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Pneucon Globe Installation, Maintenance And Operation Manual

2 way control valves and diaphragm actuator
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Document No. : PVIM/110/01
Revision No. : 00
Date.
: 01.06.2019
INSTALLATION, MAINTENANCE AND OPERATION
MANUAL OF GLOBE 2 WAY CONTROL VALVES
AND DIAPHRAGM ACTUATOR.
06/19
1 of 23

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  • Page 1 Document No. : PVIM/110/01 Revision No. : 00 Date. : 01.06.2019 INSTALLATION, MAINTENANCE AND OPERATION MANUAL OF GLOBE 2 WAY CONTROL VALVES AND DIAPHRAGM ACTUATOR. 06/19 1 of 23...

  • Page 2: Table Of Contents

    Document No. : PVIM/110/01 Revision No. : 00 Date. : 01.06.2019 Contents Section Description Page. General Warnings Storage and Handling Pre-Installation Installation Control Valve Maintenance 9-18 Actuator Maintenance 19-20 Actuator to Valve Assembly Mounting Accessories / Schematic Line Diagram of Accessories Troubleshooting 06/19 2 of 23...

  • Page 3: General

    Date. : 01.06.2019 1. GENERAL The Globe 2 way control valve range is a linear rising stem design which is suitable for a wide range of process control applications. This proven design is manufactured in accordance with international control valve standards and can be supplied with a wide range of trim design options ranging from low capacity types, standard designs through to multi stage severe service options.

  • Page 4: Warnings

    The valve must not be used on any other application, without a review by Pneucon Valve. g) The valve is not suitable for fire safe service and is not certified for this application or duty.

  • Page 5: Storage And Handling

    Following receipt of the equipment, it should be inspected for any transit damage. Any damage found should be photographed and a copy of the photograph, together with notification of the damage found sent to Pneucon Valve. b. Any flange or valve protectors should be left fitted until immediately prior to installation in the pipework.

  • Page 6: Pre-Installation

    For this requirement please contact Pneucon Valve for a more detailed procedure and details of flushing kit to be supplied.

  • Page 7: Installation

    Document No. : PVIM/110/01 Revision No. : 00 Date. : 01.06.2019 5. INSTALLATION The valve is supplied with a flow direction arrow either cast on to the body, • detailed on a separate arrow plate or detailed on the nameplate. It is very important that the valve is installed into the pipework with the correct flow direction.
  • Page 8 Document No. : PVIM/110/01 Revision No. : 00 Date. : 01.06.2019 For control valves supplied with butt weld end connections welding into the • pipework shall be undertaken by qualified welders and approved weld procedures. Any subsequent local post weld heat treatment should be carried out in accordance with the approved procedure.
  • Page 9 These factors need to be considered in determining when and how frequently a control valve should be inspected and maintained. For further recommendations for specific applications please contact Pneucon Valve. With regards to the soft parts used within the construction of a control valve and pneumatic diaphragm actuator assembly the following are some general guidelines for periods when these various parts should be replaced.
  • Page 10 Revision No. : 00 Date. : 01.06.2019 6.3 Disassembly Of Globe 2 Way Control Valve with Contoured, Microspline & Multistep Trim (Metal To Metal) 1. Remove the gland Stud Nut (Part No - 15), Gland Pusher (Part No - 13) & Gland (Part No - 12).
  • Page 11 Revision No. : 00 Date. : 01.06.2019 6.4 Disassembly Of Globe 2 Way Control Valve with Cage Guide Trim 1. Remove the gland stud nut (Part No - 20), Gland Pusher (Part No - 18) & Gland (Part No - 17).
  • Page 12 Document No. : PVIM/110/01 Revision No. : 00 Date. : 01.06.2019 Replacing Pressure Balanced Seal 6.5.1 PTFE Seals in Trim Sizes up to 6” Remove the Grub Screw (Part No - 09)for the Retainer nut. Remove the Retainer Nut (Part No - 07) from the Plug Stem Assembly.
  • Page 13 Document No. : PVIM/110/01 Revision No. : 00 Date. : 01.06.2019 6.5.3 Disassembly Of Globe 2 Way Control Valve with Cage Guided Trim (Grafoil Design) 1. Remove the gland stud nut (Part No - 19), Gland Pusher (Part No - 17) &...
  • Page 14 6.7.2 Assembly with Contoured, Spline Micro or Multistep Trims Apply sealing compound to the seat • (5) and screw into body (1). The seat ring should be tightened using a seat tool (contact Pneucon Valve for further details) Install the plug (4) and stem (9) • assembly Place body joint (3) in body recess •...
  • Page 15 Document No. : PVIM/110/01 Revision No. : 00 Date. : 01.06.2019 6.7.3 Assembly with Cage Guided Trim • Place seat gasket (3) in body and install seat (4) • Place cage gasket (10) in body(1) and place cage (12) in body •...
  • Page 16 Document No. : PVIM/110/01 Revision No. : 00 Date. : 01.06.2019 Assembly with Cage Guided Trim and Graphite Pressure Balance Seal 6.7.4 Place seat gasket (5) in body and fit seat (4) • Place cage gasket (10) in body (1) and place cage (6) in body •...
  • Page 17 Document No. : PVIM/110/01 Revision No. : 00 Date. : 01.06.2019 Gland Packing Assembly 6.8.1 PTFE Gland Packing Assembly 1. All the parts should be cleaned and examined for damage before the packing box assembly. 2. Insert first Packing Spacer (Part No - 08). 3.
  • Page 18 Document No. : PVIM/110/01 Revision No. : 00 Date. : 01.06.2019 6.9 SEAT AND PLUG LAPPING PROCESS. Lapping of the plug to the seat (if required) is normally carried out during the control • valve assembly and without the actuator fitted The valve bonnet should be fitted with the gland parts and the stem installed with a •...

  • Page 19: Actuator Maintenance

    Document No. : PVIM/110/01 Revision No. : 00 Date. : 01.06.2019 7 Actuator Maintenance PDC Actuator Disassembly and Assembly 1. Open the Window Cover (Part No - 22). 2. Using the Spring Adjuster (Part No - 12) to release the Spring Compression (Part No - 08).
  • Page 20 Document No. : PVIM/110/01 Revision No. : 00 Date. : 01.06.2019 7.2 PDO Actuator Disassembly and Assembly 1. Open the Window Cover (Part No - 19). 2. Using the Spring Adjuster (Part No - 12) to release the Spring Compression (Part No - 08).

  • Page 21: Actuator To Valve Assembly

    Document No. : PVIM/110/01 Revision No. : 00 Date. : 01.06.2019 8 Actuator to Control Valve Assembly Fitting Actuator to Valve 1. Ensure that the actuator is correctly assembled and calibrated. 2. Lower the actuator over the plug stem and gland flange to seat squarely on the valve bonnet.

  • Page 22: Mounting Accessories / Schematic Line Diagram Of Accessories

    Document No. : PVIM/110/01 Revision No. : 00 Date. : 01.06.2019 8.2 MOUNTING ACCESSORIES 1. Control valve assemblies generally comprise of a valve, actuator and instrumentation. The instrumentation normally includes a positioner and airset but can also include other accessories e.g. volume booster, solenoid valve, air lock, quick exhaust valve and limit switches.

  • Page 23: Troubleshooting

    Document No. : PVIM/110/01 Revision No. : 00 Date. : 01.06.2019 9. TROUBLESHOOTING Control valve normally require seldom attendance, except for routine check on the control valve response in respect of the input signals received from the controller. The following details some of the problems associated with the control valve operation: PROBLEMS REASON...

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