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Siemens Maxum II PD PA AP Service Manual

Valves and oven components
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Maxum II
PD PA AP
Maxum II Valves and Oven
Components
Service Manual
10/2018
A5E42019844001
Oven Types
Using Small Tubing Fittings
Temperature Control Module
(TCM)
Valves
Heaters
Appendix A - Contact
Information
1
2
3
4
5
A

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Summary of Contents for Siemens Maxum II PD PA AP

  • Page 1 Oven Types Using Small Tubing Fittings Temperature Control Module (TCM) Maxum II Valves PD PA AP Maxum II Valves and Oven Heaters Components Appendix A - Contact Information Service Manual 10/2018 A5E42019844001...
  • Page 2 Note the following: WARNING Siemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems.

  • Page 3: Table Of Contents

    4.2.1 SLIV Maintenance Overview....................37 4.2.2 Liquid Injection Valve Component Locations.................38 4.2.3 Troubleshooting........................39 4.2.4 Service Procedures........................40 4.2.5 Siemens Liquid Injection Valve Specifications...............44 Model 50 Valve........................45 4.3.1 Basic Maintenance: Model 50 Valve..................46 4.3.2 Preventing Port to Port Leaks....................46 4.3.3 Maintenance Considerations....................46 4.3.4 Model 50 Valve Maintenance Procedure................48...
  • Page 4 Table of contents 4.4.2.2 M20 Intended Users.......................60 4.4.2.3 M20 Safety and Certification Information................60 4.4.2.4 M20 Procedure - Overview....................60 4.4.2.5 M20 Procedure - Maintenance Facility...................60 4.4.2.6 M20 Procedure - Figures.......................61 4.4.2.7 M20 Procedure - Cleaning of Parts..................62 4.4.2.8 M20 Procedure - Valve Cap Disassembly................63 4.4.2.9 M20 Procedure - Actuator Disassembly.................63 4.4.2.10...
  • Page 5 Typical Modular Oven Configuration...................18 Figure 1-11 Heater and RTD Tubes for the Modular Oven................19 Figure 2-1 Valco Fitting..........................21 Figure 2-2 Siemens and Valco Fittings Compared..................22 Figure 2-3 Siemens Fittings Assembly......................22 Figure 3-1 Temperature Control Module Connections.................23 Figure 4-1 Solenoid Valve Control Module (SVCM)..................27 Figure 4-2 Solenoid Control Module......................28...
  • Page 6 Table of contents Figure 4-6 Liquid Injection Valve Exploded View..................38 Figure 4-7 Liquid Injection Valve Body......................39 Figure 4-8 Orientation of Sample Flow Unit Hole..................43 Figure 4-9 Model 50 Valve..........................46 Figure 4-10 Dimensions and Flow Paths of Model 50 Valve................47 Figure 4-11 Model 50 Valve Exploded View....................48 Figure 4-12 Model 50 Valve Assembly Details....................51...

  • Page 7: Oven Types

    Oven Types Chromatographic separations of samples are carried out inside the oven zone of the Maxum II analyzer. For most separations to be performed, the oven must be kept at an elevated temperature. This means that the oven zone must have a heat source, while simultaneously preventing that heat source from being capable of igniting flammable vapors which might be present within the oven.

  • Page 8: Isothermal Air Bath Oven Heater System (Single And Split)

    Oven Types 1.1 Isothermal Air Bath Oven Heater System (Single and Split) Isothermal Air Bath Oven Heater System (Single and Split) The isothermal airbath oven is the most common oven used in the Maxum II. It is available in single and split configurations to accommodate a wide range of chromatographic applications. Because high temperatures are often necessary in order to carry out chromatographic separations, the isothermal airbath oven heater system is equipped with various safety features to prevent ignition.

  • Page 9: Figure 1-2 Timing Coil For Pressure Switch

    Oven Types 1.1 Isothermal Air Bath Oven Heater System (Single and Split) The air pressure switch is connected to the oven air flow using an extension that runs parallel to the oven air flow line. This extension line is equipped with a restrictor coil. The coil is necessary in order to create a short delay between the start of air flow and the activation of the pressure switch.

  • Page 10: Temperature Limiting

    Oven Types 1.1 Isothermal Air Bath Oven Heater System (Single and Split) 1.1.2 Temperature Limiting The temperature-control path of the oven is controlled via an RTD sensor, set-point resistor, associated circuitry and a solid-state relay. The temperature of the air itself is monitored via two independent control paths which ensure that all temperatures remain below possible ignition limits.

  • Page 11: Programmed Temperature Air Bath Oven Heater System

    Oven Types 1.2 Programmed Temperature Air Bath Oven Heater System Programmed Temperature Air Bath Oven Heater System In chromatographic applications "temperature programming" is used in special situations where incremental increases in column temperature are needed in order to reduce retention time (the time required for separation).

  • Page 12: Is Probe And Barrier

    Oven Types 1.2 Programmed Temperature Air Bath Oven Heater System 1.2.1 IS Probe and Barrier To maintain a fast measurement response, a bare-element RTD sensor is used for the temperature probe. However, this type of probe must be intrinsically safe. The probe is connected to an IS barrier mounted behind the detector cabinet as shown below.

  • Page 13: Isothermal Airless Oven Heater System

    Oven Types 1.3 Isothermal Airless Oven Heater System Isothermal Airless Oven Heater System The Maxum II airless oven is used to provide a very stable isothermal oven temperature without the need to supply air to control the oven temperature. This allows for excellent chromatographic results while reducing utility costs.

  • Page 14: Figure 1-7 Location Of Temperature Probes And Heaters In Airless Oven

    Oven Types 1.3 Isothermal Airless Oven Heater System Insert location for RTD probe (same as on opposite side) Channel for heating element Explosion-proof plugs (shown enlarged) Figure 1-7 Location of Temperature Probes and Heaters in Airless Oven The heating elements are enclosed in hollow channels running diagonally down the side of the aluminum casing.

  • Page 15: Maintenance Considerations For Airbath And Airless Ovens

    Oven Types 1.4 Maintenance Considerations for Airbath and Airless Ovens Maintenance Considerations for Airbath and Airless Ovens The following practices must be observed in order to operate, maintain and prevent compromise of the airbath oven (including programmed temperature oven) and airless ovens of Maxum II.

  • Page 16: Airbath Heater Assembly Replacement

    Oven Types 1.6 Airless Heater Replacement Airbath Heater Assembly Replacement 1. Verify work area is safe 2. Disconnect power from analyzer 3. Turn off air supply to analyzer 4. Unplug probe from converter cable at PECM 5. Remove center or left of center Mezzanine Cover 6.

  • Page 17: Figure 1-9 Airless Oven Heater Locations

    Oven Types 1.6 Airless Heater Replacement 13.The gasket needs to be set to cover the hole to get the purge in the EC to work properly. 14.Verify the temperature controller and heaters are working properly. Heaters Left Oven Heaters Right Oven Heater Retainer Caps Heater...

  • Page 18: Modular Oven Heater System

    Oven Types 1.7 Modular Oven Heater System Modular Oven Heater System The Maxum II Modular Oven provides a stable isothermal oven temperature for certain lower temperature applications. The hardware of the Maxum II Modular Oven analyzer configuration is simplified and fully modular. Two independent ovens may be installed in the Maxum II Modular Oven analyzer.

  • Page 19: Maintenance Considerations For Modular Ovens

    Oven Types 1.8 Maintenance Considerations for Modular Ovens temperature, its related control circuit or its relay, the power to the heater cannot be reactivated without powering down and restarting the analyzer. Figure 1-11 Heater and RTD Tubes for the Modular Oven Maintenance Considerations for Modular Ovens The following practices must be observed in order to operate, maintain and prevent compromise of the Maxum II Modular Oven heater system.
  • Page 20 Oven Types 1.8 Maintenance Considerations for Modular Ovens Maxum II Valves and Oven Components Service Manual, 10/2018, A5E42019844001...

  • Page 21: Using Small Tubing Fittings

    " tubing used for the detectors. The first, (Valco or Swagelock) use a metal-to-metal seal that results from compressing a ferrule. The second, (Siemens) uses a PTFE seal and a compression ring to create a seal. Assembling Valco and Swagelock Fittings The ports are machined for a 1/16”...

  • Page 22: Figure 2-2 Siemens And Valco Fittings Compared

    Figure 2-2 Siemens and Valco Fittings Compared Assembling Siemens Fittings The Siemens fitting has a PTFE seal insert that fits over the tube , and is held inside a compression ring. 1. Slide the nut over the tubing. 2. Slide the PTFE seal over the tubing and towards the tip of the nut.

  • Page 23: Temperature Control Module (Tcm)

    Temperature Control Module (TCM) Overview The Temperature Control Module (TCM) is identical to the Base3 DPM except that it includes only the temperature-control components. This is useful when extra temperature-control functions are needed. Location ID Switch in the A Location ID Switch is also included, and functions as described in Base3 DPM section.

  • Page 24: Replacing A Tcm

    General Analyzer Shutdown Procedure in the 1. Back up and shut down the unit using the Maxum Edition II Analyzer General Maintenance Manual (A5E42019842001) from the Siemens web site (http://support.industry.siemens.com/cs/products? dtp=Manual&pnid=17741). 2. Open the electronics enclosure door. 3. Disconnect the RTD temperature input cables (top rear of unit, if present).
  • Page 25 8. Reconnect the RTD temperature input cables (top rear of unit, if present). General Analyzer Startup Procedure in the Maxum Edition II 9. Follow the steps in the Analyzer General Maintenance Manual (A5E42019842001) from the Siemens web site (http://support.industry.siemens.com/cs/products?dtp=Manual&pnid=17741). Maxum II Valves and Oven Components...
  • Page 26 Temperature Control Module (TCM) 3.1 Replacing a TCM Maxum II Valves and Oven Components Service Manual, 10/2018, A5E42019844001...

  • Page 27: Valves

    Valves Solenoid Valves 4.1.1 Solenoid Valve Control Module (SVCM) The Solenoid Valve Control Module (SVCM) provides pneumatic interface to control flow to the oven sampling and column valves. Solenoid valves are suitable for air, nitrogen and helium on the pressure side and vacuum on the vent side. The electronic enclosure has space for up to three modules.

  • Page 28: Figure 4-2 Solenoid Control Module

    Valves 4.1 Solenoid Valves Mechanical Each SVCM incorporates 8 solenoid valve circuits for driving 3-way and 4-way solenoid valves. The SVCM is mounted in the Controller Enclosure on the manifold block. It can also be mounted in a Division 2 purged enclosure. Up to 3 SVCM assemblies can be mounted in the Maxum II.

  • Page 29: Table 4-1 Digital Output Solenoid Valve Groups

    Valves 4.1 Solenoid Valves Digital Control Channels On present Maxum II analyzers, the solenoid control circuitry is on the PECM. Digital outputs assigned to each solenoid valve are shown in the table below. If a digital output is 0 the valve is OFF;...

  • Page 30: Replacing A Solenoid Valve

    General Analyzer Shutdown Procedure in the 1. Back up and shut down the unit using the Maxum Edition II Analyzer General Maintenance Manual (A5E42019842001) from the Siemens web site (http://support.industry.siemens.com/cs/products? dtp=Manual&pnid=17741). 2. Open electronic enclosure door (using a 4mm (5/32”) Allen wrench if necessary).

  • Page 31: Liquid Injection Valve

    6. Reattach the cable to the solenoid. General Analyzer Startup Procedure in the Maxum Edition II 7. Follow the steps in the Analyzer General Maintenance Manual (A5E42019842001) from the Siemens web site (http://support.industry.siemens.com/cs/products?dtp=Manual&pnid=17741). Liquid Injection Valve The Siemens Liquid Injection Valve (SLIV) is used to automatically inject a fixed quantity of liquid sample fol‐...
  • Page 32 Sample Injection ples that contain a lot of solids, which would clog a dia‐ phragm valve, can be measured using a Siemens Liquid Injection Valve. With the use of a temperature control circuit, the vaporizer temperature can be changed for different boiling point samples to insure complete vapor‐...

  • Page 33: Figure 4-3 Sliv Installation Details

    Valves 4.2 Liquid Injection Valve Vaporization System The vaporization tube is inserted with an aluminum sleeve and into the heater assembly. The carrier gas is preheated by routing it along the outside of the heated vaporizer and then into the vaporizer. The vaporization temperature can be set independently of the oven temperature, and is set based on the sample composition.

  • Page 34: Figure 4-4 Sliv Heater And Probe Connections In The Electronics Cabinet

    4.2 Liquid Injection Valve Temperature Control The Siemens Liquid Injection Valve Heater Module probe is connected to a Base Detector Personality Module (DPM) Temperature Controller. Most Base DPM boards have two temperature control circuits so there is normally an extra one for the SLIV. If not, then a Temperature Control Module (TCM), part number A5E02645925002, is added to the analyzer.
  • Page 35 Valves 4.2 Liquid Injection Valve Sample Flow Unit The sample flow unit is located in the middle section (body) of the valve between the vaporizer and the actuator piston. It is isolated from the vaporizer and actuator by lens-shaped Teflon gaskets.

  • Page 36: Figure 4-5 Vaporization Temperature

    Filter Requirements The tappet and gaskets will wear faster if the sample contains solid particles. In these cases, a filter is required upstream of the injection. Siemens recommends a filter with the following characteristics: ● 98% for 0.3-μm particles with liquid samples ●...

  • Page 37: Sliv Maintenance Overview

    Valves 4.2 Liquid Injection Valve 4.2.1 SLIV Maintenance Overview Schedule This section provides routine maintenance and repair procedures for the liquid injection valve. A 6-week preventive maintenance schedule is recommended for servicing the valve; however, the schedule you choose will depend upon the: ●...

  • Page 38: Liquid Injection Valve Component Locations

    Valves 4.2 Liquid Injection Valve ● A sample that contains non-volatile or easily polymerized components (salts, proteins, monomers etc.) can deposit residues in the vaporizer (16), in the injection hole, on the sample flow unit (15), and on the injection stem (6). Therefore, these parts should be cleaned regularly if the sample contains materials which are not vaporized.

  • Page 39: Troubleshooting

    Valves 4.2 Liquid Injection Valve Groove for sample-flow unit Label for Dosing Volume Alignment Groove for attaching to Groove for Control Cylinder O-ring using hex set screws Figure 4-7 Liquid Injection Valve Body 4.2.3 Troubleshooting Faults, Causes, Remedies Fault Causes Remedy All peaks appear smaller Sample flow unit (15) or injection...

  • Page 40: Service Procedures

    Valves 4.2 Liquid Injection Valve Fault Causes Remedy The space between the stem (6) and the inside The sample contains dissolved salts The deposits in the vaporizer (16) wall of the vaporizer (16) is filled by deposits. and other nonvolatile materials. may be removed mechanically (drill/ This can block the supply of carrier gas.
  • Page 41 Valves 4.2 Liquid Injection Valve 5. Unscrew the sample line and pneumatic actuation control lines from the liquid injection valve. 6. (If removing entire valve) Disconnect the carrier gas inlet line from the carrier inlet tube (18), and disconnect the column from the vaporizer (16) outlet inside the oven and then remove the valve.
  • Page 42 O-Ring Replacement The silicone O-rings of the pneumatic drive should be regularly greased with a high-quality lubricant such as DuPont Krytox EG2000 or equivalent (Siemens part number G87004). Procedure 1. Carefully remove the two large O-rings (4) and the small O-ring (8) out of the valve body (7) and control piston (3) using a small screwdriver or a needle.
  • Page 43 Valves 4.2 Liquid Injection Valve 5. Insert the sample flow unit (15) into the valve body (7) over the stem (6). See the Liquid Injection Valve Body (Page 39) illustration. Note that the stem hole through the sample flow unit is tapered. This tapering is not readily apparent when looking at the uninstalled sample flow unit, but it will be visible when it is installed on the stem.

  • Page 44: Siemens Liquid Injection Valve Specifications

    (if these were disconnected during removal). Replacing the Dosing Stem Although it is possible to replace the control piston (3) and stem (6) without disassembling the valve body (7), Siemens recommends that the valve body be disassembled and serviced whenever the stem is replaced. 4.2.5...

  • Page 45: Model 50 Valve

    Valves 4.3 Model 50 Valve Table 4-6 Siemens Liquid Injection Valve Vaporization temperature 60 to 350°C (140 to 662°F) depending on application and temperature class Injection volume 0.1 to 9.5 μl Sample temperature -20 to +150°C (-4 to 302°F) Material in Contact with Sample Stainless steel, mat.

  • Page 46: Basic Maintenance: Model 50 Valve

    Maintenance Considerations If customer maintenance personnel are not technically trained to repair the Model 50 valve on site, it is recommended that the valve be returned to Siemens for service, repair, or direct replacement. To repair the Model 50 valve on site, the customer must have the necessary maintenance tools and replacement parts.
  • Page 47 Valves 4.3 Model 50 Valve All foreign contamination adhering to valve must be removed using cleaning solvent, such as hexane, acetone, or methanol and a dust/lint free cloth. After cleaning Model 50 valve components, shake or blow with clean air the excess cleaning fluid from the individual components.

  • Page 48: Model 50 Valve Maintenance Procedure

    4.3.4 Model 50 Valve Maintenance Procedure If customer maintenance personnel are not technically trained to repair the Model 50 valve on site, it is recommended that the valve be returned to Siemens for service, repair, or direct replacement. Valve Removal 1.
  • Page 49 8 and 9. Refer to Figure 6-2 for port locations. Note If the valve is to be sent back to Siemens for service, then skip to the "Valve Reinstallation" portion of this procedure to install the replacement valve.
  • Page 50 13.Tighten the screws down evenly (2.5mm Allen wrench) to 6 to 8 inch-pounds of torque. (It is recommended to use the torque wrench available from Siemens, PN 1631005-001, which is calibrated at 7.2 inch pounds). Remove the assembled valve from the valve fixture.
  • Page 51 4.3 Model 50 Valve Valve Reassembly Use the Valve Assembly Fixture, Siemens PN 2020281-001, properly align the Diaphragms when rebuilding the Model 50 Valve. The fixture consists of a base (1), 2 guide pins (2) and a diaphragm placement disc (3). This fixture will allow the user to place the diaphragm in the center of the valve.
  • Page 52 Use a torque wrench with a 2.5mm hex bit to 6 to 8 inch-pounds of torque. (It is recommended to use the torque wrench available from Siemens, PN 1631005-003, which is calibrated at 7.2 inch pounds). Remove the assembled valve from the valve fixture.

  • Page 53: Model 50 Valve Specifications

    Valves 4.3 Model 50 Valve Valve Reinstallation 1. Reinstall the valve in the oven and connect all tubing. Note Best practice is to seat the fittings in a Valco fitting and not in the Model 50 Valve ports. This will help increase the life of the valve and reduce the chances of causing the center plate to bulge from over tightening the fittings.

  • Page 54: Model 20 Valve

    Maintenance Considerations If customer maintenance personnel are not technically trained to repair the Model 20 valve on site, it is recommended that the valve be returned to Siemens for service, repair, or direct replacement. To repair the valve on site, the customer must have the necessary maintenance tools and replacement parts.
  • Page 55 Valves 4.4 Model 20 Valve It is possible to remove the valve cap of the Model 20 valve while the valve is installed in the Maxum oven. However, there may be situations where the user wishes to remove the valve from the oven.

  • Page 56: Diagnostic Procedures

    Valves 4.4 Model 20 Valve Valve Cap Belleville Washers (6 total) Allen Screws (3 total) Teflon Disc Seal Diaphragm Dacron Cushion Diaphragm Plungers (6 total) 12. Air Loaded (Upper) Piston 13. Valve Plunger Body 14. Cylinder Base 15. Spring Loaded (Lower) Piston 16.

  • Page 57: Model 20 Valve Cap Maintenance Procedure

    Model 20 Valve Cap Maintenance Procedure If customer maintenance personnel are not technically trained to repair the Model 20 valve on site, it is recommended that the valve be returned to Siemens for service, repair, or direct replacement. Within the following procedures, the numbers in parenthesis are callouts. They denote parts referenced in the lists contained in the figure in section 6.5.2;...
  • Page 58 Note To assure proper tightness in the following two steps, it is recommended to use the torque wrench available from Siemens, PN 1631005-002, which can be adjusted over the range of torque measurements listed below. Maxum II Valves and Oven Components...

  • Page 59: Disassembly And Cleaning

    Siemens. Recommended tools will include an ultrasonic cleaner and a clean workstation with lint-free cloth. It may be easier and less expensive to replace a valve or return it to Siemens for service rather than perform Maxi-Maintenance. Maxum II Valves and Oven Components...

  • Page 60: M20 Intended Users

    If customer maintenance personnel are not technically trained to repair the valve on site, it is recommended that the valve be returned to Siemens for repair or direct replacement. In addition to training, the customer must have a clean work environment available for rebuilding and cleaning the valve.

  • Page 61: M20 Procedure - Figures

    Valves 4.4 Model 20 Valve 4.4.2.6 M20 Procedure - Figures The following figures are intended for use as a reference throughout the procedure. The numbers in the diagrams relating to individual components are referenced in parentheses in the procedure steps. Valve Cap Allen Screws (3 total) Belleville Washers (6 total)

  • Page 62: M20 Procedure - Cleaning Of Parts

    Valves 4.4 Model 20 Valve Valve Cap Belleville Washers (6 total) Allen Screws (3 total) Teflon Disc Seal Diaphragm Dacron Cushion Diaphragm Plungers (6 total) Ferrule Top Ferrule Bottom Connector Port Tubing Air Loaded (Upper) Piston Valve Plunger Body Cylinder Base Spring Loaded (Lower) Piston Allen Screws (3 total) Belleville Washers (6 total)

  • Page 63: M20 Procedure - Valve Cap Disassembly

    Valves 4.4 Model 20 Valve It is important for proper procedures to be used when cleaning valve and detector parts. All foreign contamination adhering to the part should be removed using an appropriate cleaning solvent, such as hexane, acetone, or methanol and a dust/lint free cloth. Use of an ultrasonic cleaner is often helpful.
  • Page 64 Valves 4.4 Model 20 Valve 1. Using even finger pressure around edges of plunger valve body (13), push valve plunger body against cylinder valve base (14). All six plungers should rise. 2. Release plunger valve body (13). The six plungers should drop. If plungers do not drop, check for oil film on plungers.

  • Page 65: M20 Procedure - Actuator Reassembly

    Valves 4.4 Model 20 Valve 4.4.2.10 M20 Procedure - Actuator Reassembly Note It is extremely important that, when reassembling the actuator, that the assembly area be clean and dust free. Hands of maintenance personnel must be clean and not oily and tools must also be clean.

  • Page 66: M20 Procedure - Valve Cap Reassembly

    Note To assure proper tightness in the following two steps, it is recommended to use the torque wrench available from Siemens, part number 1631005-002, which can be adjusted over the range of torque measurements listed below. Maxum II Valves and Oven Components...

  • Page 67: Model 20 Valve Specifications

    Valves 4.4 Model 20 Valve 9. Referring to the following screw tightening rotation sequence, securely tighten the three Allen screws (3) that connect the valve cap (1) to the valve plunger body (13). One at a time, tighten each screw to first torque. Then continue with the next torque value until the final value is reached.

  • Page 68: Model 20 Ht Valve

    Model 20 High Temperature Valve can be found in the Model 20 High Temperature Valve Repair Manual, which can also be found on the Maxum II Documentation CD. It may be easier and less expensive to replace a valve or return it to Siemens for service rather than perform Maxi-Maintenance. 4.5.2...

  • Page 69: M20Ht Safety And Certification Information

    Valves 4.5 Model 20 HT Valve 4.5.3 M20HT Safety and Certification Information This procedure is not likely to directly impact the safety systems of the analyzer. However, care must be exercised at all times when working with the analyzer. Since the valve is located in the oven of the Maxum II, appropriate care must be taken to ensure that the environment is safe to perform the work.

  • Page 70: M20Ht Procedure - Figures

    Valves 4.5 Model 20 HT Valve 4.5.6 M20HT Procedure - Figures The following figures are intended for use as a reference throughout the procedure. The numbers in the diagrams relating to individual components are referenced in parentheses in the procedure steps. Outer (Large) Bal-Seals (2 total) Plungers (6 total) Spring Loaded (Lower) Piston...

  • Page 71: Figure 4-18 Cross Section View Of Model 20 Htv

    Valves 4.5 Model 20 HT Valve Outer (Large) Bal-Seals (2 total) Plungers (6 total) Spring Loaded (Lower) Piston Cylinder Base Valve Plunger Body Air Loaded (Upper) Piston Large Belleville Washers (3 total) Inner (Small) Bal-Seal Actuator Air Input Valve Cap Teflon Disc Seal Diaphragm Nomex Cushion Diaphragm Allen Screws (6 total)

  • Page 72: Figure 4-19 Exploded View Of Model 20 Htv

    Valves 4.5 Model 20 HT Valve Outer (Large) Bal-Seals (2 total) Inner (Small) Bal-Seal Plungers (6 total) Actuator Air Input Spring Loaded (Lower) Piston Valve Cap Cylinder Base Teflon Disc Seal Diaphragm Valve Plunger Body Nomex Cushion Diaphragm Air Loaded (Upper) Piston Allen Screws (6 total) Large Belleville Washers (3 total) Belleville Washers (12 total)

  • Page 73: M20Ht Procedure - Cleaning Of Parts

    Valves 4.5 Model 20 HT Valve 4.5.7 M20HT Procedure - Cleaning of Parts All parts must be inspected for cleanliness, including catalyst or polymer buildup on the valve cap. Before re-assembly, faces of the plunger valve body (17) should be wiped clean using hexane, acetone, or methanol and a lint free cloth.

  • Page 74: M20Ht Procedure - Actuator Disassembly

    Valves 4.5 Model 20 HT Valve 4. Inspect the Teflon seal disc diaphragm (33) and the Nomex cushion diaphragm (34). Examine valve cap base seal (33) and cushion diaphragm (34) subassemblies for dirt, contamination or breaks. Regardless of whether damage or contamination is evident, discard old seal and cushion, and replace them with new component(s).

  • Page 75: M20Ht Procedure - Actuator Re-Assembly

    Valves 4.5 Model 20 HT Valve 7. Place cylinder valve base (16) in upright position. Insert a 6-32 hex threaded standoff screw into the center-threaded hole and pull to remove air loaded piston (18) and spring-loaded piston (15). Note In the following step, DO NOT use more than 30 psig (210 kPa) of air pressure when using this method.

  • Page 76: Figure 4-20 Assembling Bal-Seal (13) On Piston (15)

    Valves 4.5 Model 20 HT Valve 5. Apply a bead of Krytox 240 AC lubricant, or equivalent, in both Bal-Seal grooves of air- loaded piston (18). Figure 4-20 Assembling Bal-Seal (13) on Piston (15) 6. Using the pads of your fingers (or an "O" ring as a cushion), install the small spring loaded Bal-Seal (20) in air loaded piston (18) groove with associated spring facing up.

  • Page 77: Figure 4-21 Installing Bal-Seal (20) In Piston Groove (18)

    Valves 4.5 Model 20 HT Valve 12.Position valve upright with the three ports on the left. Place assembly guide tool (Part Number T11000) on the valve, with the cutout on the lip of assembly tool over the upper tube fitting. Refer to Figure 6-6. 13.Lift piston and Bal-Seal assembly and orient assembly with the upper piston index guide pin towards the maintenance person.
  • Page 78 Valves 4.5 Model 20 HT Valve Figure 4-23 Inserting Piston Assembly (15 and 18) into Base (16) 1. Align plunger valve body (17) and insert piston index guide pin into one of the three bottom plunger valve body holes. 2. Rotate plunger valve body (17) to align the plunger valve body screw holes with cylinder valve base (16) threaded holes.

  • Page 79: M20Ht Procedure - Valve Cap Re-Assembly

    To assure proper tightness in the following two steps, it is recommended to use the torque wrench (PN 1631005-002) and bit (PN 1631005-701) which are available from Siemens and can be adjusted over the range of torque measurements listed below.

  • Page 80: Model 20 High Temperature Valve Specifications

    Valves 4.5 Model 20 HT Valve 9. Referring to the following screw tightening rotation sequence, securely tighten the three Allen screws (35), that connect the valve cap (32) to the valve plunger body (17). One at a time, tighten each screw to first torque. Then continue with the next torque value until the final value is reached.

  • Page 81: Model 11 Valve

    Valves 4.6 Model 11 Valve Model 11 Valve This section presents information to disassemble, clean, and rebuild the Model 11 Valve (including the Model 11 Low Dead Volume Valve). The Model 11 valve (M11) is available in two primary types, the standard Model 11 Valve and the Model 11 Low Dead Volume (LDV) valve.

  • Page 82: Valve Operation

    Valves 4.6 Model 11 Valve 4.6.1 Valve Operation The Model 11 valve can be applied in proc‐ ess chromatographs as a liquid or vapor sample valve, column switching valve, or a column backflush valve. It provides the uni‐ form sample volume, high reliability (500,000 cycle life on clean gas), low inter‐...
  • Page 83 Valves 4.6 Model 11 Valve Figure 4-25 Model 11 Valve, LDV Version Exploded View The two actuating pistons are spring loaded in a manner that assures that all six passages are momentarily closed during the switching operation (both energized and de-energized). This feature prevents unwanted mixing of gases during the switching cycle.

  • Page 84: Figure 4-26 Model 11 Operational Diagrams

    Valves 4.6 Model 11 Valve Figure 4-26 Model 11 Operational Diagrams Maxum II Valves and Oven Components Service Manual, 10/2018, A5E42019844001...

  • Page 85: Model 11 Maintenance Overview

    Additional procedures related to the Model 11 Valve can be found in the Model 11 Valve Repair Manuals, which can also be found on the Maxum II Documentation CD. It may be easier and less expensive to replace a valve or return it to Siemens for service rather than perform Maxi-Maintenance.

  • Page 86: Diagnostic Procedures

    This condition requires disassembly of the entire valve (maxi-maintenance). It is recommended that the valve be returned to Siemens for service. Maxum II Valves and Oven Components Service Manual, 10/2018, A5E42019844001...

  • Page 87: M11 Procedure - Maintenance Facility

    Valves 4.6 Model 11 Valve 4.6.6 M11 Procedure - Maintenance Facility When cleaning the valve and associated components, it is imperative that the maintenance be performed in a clean and contaminant free facility. Components should be placed on a lint free cloth to prevent impurities from contaminating the valve and/or components.

  • Page 88: M11 Procedure - Figures

    Valves 4.6 Model 11 Valve 4.6.7 M11 Procedure - Figures The following figures are intended for use as a reference throughout the procedure. The numbers in the diagrams relating to individual components are referenced in parentheses in the procedure steps. Valve Body O-Ring 10.

  • Page 89: Figure 4-28 Model 11 Valve Cap Exploded View

    Valves 4.6 Model 11 Valve 1. Screw (3 total required) 2. Belleville Washer (6 total required) 3. Valve Cap 4. Teflon Seal Disc 5. Dacron Cushion Disc 6. O-Ring 7. Plungers (6 total required) Figure 4-28 Model 11 Valve Cap Exploded View This end toward valve cap This end toward pistons Figure 4-29...

  • Page 90: Figure 4-30 Valve Body Exploded View

    Valves 4.6 Model 11 Valve Valve Body O-Ring 10. Spring 11. Air Loaded Piston 12. O-Ring 13. O-Ring 14. Spring Loaded Piston 15. Compensation Plate 16. Compression Spring 17. Compression Plate To Valve 18. Retaining Base 19. Retaining Ring Clip 20.

  • Page 91: Mini-Maintenance Procedures (Valve Cap And Fittings)

    Valves 4.6 Model 11 Valve P49510 S52000 P49500 V16052 B00065 H10648 Figure 4-32 Assembly of Compression Spring V16022 Apply Loctite Piston Spring Pressure Points Figure 4-33 Greasing of Spring Pressure Points 4.6.8 Mini-Maintenance Procedures (Valve Cap and Fittings) 4.6.8.1 M11 Procedure - Valve Cap Disassembly 1.

  • Page 92: Figure 4-34 M11 - 4 Exploded View Of Model 11 Valve Body

    Valves 4.6 Model 11 Valve 4. If the valve is a sample valve flush the sample lines through the valve with an inert gas such as the carrier gas to remove any residual sample that may pose a danger do the user. 5.

  • Page 93: M11 Procedure - Cleaning Of Parts

    Valves 4.6 Model 11 Valve Disassembling the Valve Cap 1. Relieve the pressure on the base Allen Set Screw (21) by turning it counterclockwise until it turns easily. 2. Remove the three Allen head cap socket screws (1) and separate the cap (3) from the valve body (8).

  • Page 94: M11 Procedure - Valve Cap Cleaning And Re-Assembly

    Valves 4.6 Model 11 Valve It is possible and often better to use an appropriate detergent, such as Alconox® for cleaning instead of solvent. However, after cleaning with a detergent, it is necessary to rinse the part thoroughly with deionized water (distilled water is also acceptable) in order to remove detergent residue.
  • Page 95 9. It is recommended that appropriate torque wrenches be used for this step (available from Siemens – PN’s 1631005-002 and 1631005-003). Install valve cap (3) using the three 10-32 Allen screws (1). Screws must be tightened evenly in sequence 1, 2, 3, 1 sequence.

  • Page 96: Maxi-Maintenance Procedures (Valve Body)

    Valves 4.6 Model 11 Valve 4.6.9 Maxi-Maintenance Procedures (Valve Body) 4.6.9.1 M11 Procedure - Valve Body Disassembly 1. Remove the six plungers (7) by inverting valve body (8) and then shaking it. Plungers should fall into the palm of the hand. If a plunger(s) is stuck and does not fall out, delay removing it until after the spring loaded and air loaded pistons (14 and 11) are removed.

  • Page 97: M11 Procedure - Valve Body Cleaning

    - Cleaning solution as described in the section of this chapter titled, Cleaning of Parts. Where indicated, use only Krytox 240AC grease (Siemens part # G87004) If a strong detergent solution is used, all cleaned parts must be thoroughly rinsed with deionized water or distilled water to remove detergent residue before reassembly of valve body.

  • Page 98: Model 11 Valve Specifications

    Valves 4.6 Model 11 Valve 9. Insert both pistons (14 and 11) into the bottom of cylinder. Use retaining ring pliers to install the pistons with the guide pin in the hole of the valve body (8). Refer to Figure 7-5. NOTICE Exercise care not to damage the O-rings when sliding them past the lower retaining ring groove.

  • Page 99: Model 11 Low Dead Volume Valve (Ldv) Specifications

    Valves 4.6 Model 11 Valve Minimum sample pressure before it is neces‐ 34.5 kPa (5 psig) sary to apply vacuum assistance to lower chamber: Maximum leak rate between ports: Less than 1 μl per minute Material in contact with sample: 316 stainless steel and TFE, standard.

  • Page 100: Live T Switch

    Valves 4.7 Live T Switch Live T Switch The Live T Switch is a valve-less switch that can be used in place of a valve for switching columns. The Live T switch is virtually maintenance free since it has no moving parts, no temperature limitations and the sample only comes into contact with metal parts inside the switch.

  • Page 101: Valco Rotary Valves

    Valves 4.8 Valco Rotary Valves Switching Configuration: Split Vapor Injection Carrier Gas: Nitrogen EPC 2-1 Carrier Inlet Pm(-) EPC 3-1 T-Piece Inlet (end of A- or Pre Column) Pm(+) EPC 3-2 T-Piece Outlet (Inlet of B- or Main Column) Valco Rotary Valves 4.8.1 Valco A4 C6UWE Valve Specifications Many of the parameters for these valves are application dependent.
  • Page 102 Valves 4.8 Valco Rotary Valves Maxum II Valves and Oven Components Service Manual, 10/2018, A5E42019844001...

  • Page 103: Heaters

    Heaters Air Bath Oven Heaters The air bath oven can be setup for a High Power Configuration or Medium Power Configuration. This table describes the differences between the two configurations. The high power heater has a red insulation cover and the medium power has a gray insulation cover. Configuration Heater and Temperature Control Hardware HIGH POWER CONFIGURATIONS...

  • Page 104: Figure 5-1 1400 Watt Air Bath Heater

    Heaters 5.1 Air Bath Oven Heaters Figure 5-1 1400 Watt Air Bath Heater Programmed Temperature Heater Assembly with Deflector Medium Wattage Heater Assembly (2021680-001) (2021284-002) Maxum II Valves and Oven Components Service Manual, 10/2018, A5E42019844001...
  • Page 105 Heaters 5.1 Air Bath Oven Heaters Heater White Ω Heater Gray Connector White Ω Temperature Probe White Ω Connector White Black Ω Black White Ω White Safety Ground Lead Mounting Flange Temperature Set Point Probe Air Inlet Heater Oven Temperature Shutdown and Temperature Limit Probe Heated Air Outlet Figure 5-2...

  • Page 106: Airless Oven Heaters

    Heaters 5.2 Airless Oven Heaters Airless Oven Heaters The airless oven configuration uses the medium power relay configuration. There are two heaters located in each oven. They slide in from the front of the oven through a diagonal shaft in each side of the oven. The wiring connections are located on the top end of the heater which sticks out of the top of the oven in the purged area of the mezzanine.

  • Page 107: Figure 5-4 Airless Oven Heater Locations In Mezzanine Area

    Heaters 5.2 Airless Oven Heaters Figure 5-4 Airless Oven Heater Locations in Mezzanine Area Maxum II Valves and Oven Components Service Manual, 10/2018, A5E42019844001...
  • Page 108 Heaters 5.2 Airless Oven Heaters Maxum II Valves and Oven Components Service Manual, 10/2018, A5E42019844001...

  • Page 109: Appendix A - Contact Information

    ● For MAXUM Edition II and MicroSAM Procedures and Updates, use the browser search function (Ctrl-F) to search for the part number or name of this product. SIOS - Siemens Industry Online Support The foundation for product information is the SIOS site at http://support.industry.siemens.com/ cs/products. Searching for Manuals The following address starts a search for Maxum II manuals: http://support.industry.siemens.com/cs/products?dtp=Manual...

  • Page 110: Contacts

    Appendix A - Contact Information A.2 Contacts Contacts Register at the Siemens Industry Online Support (SIOS) website: https://support.industry.siemens.com International Siemens AG Siemens Industry, Inc. I IA SC PA PM Process Analytics 5980 West Sam Houston Parkway North Oestliche Rheinbrueckenstrasse 50...

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