Edwards ATEX 1 EHR Instruction Manual

Liquid ring vacuum pumps

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A750-04-880

Issue F Original

Instruction Manual

ATEX Category 1, 2 and 3 EHR

and SHR Liquid Ring Vacuum Pumps

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Page 1 A750-04-880 Issue F Original Instruction Manual ATEX Category 1, 2 and 3 EHR and SHR Liquid Ring Vacuum Pumps...
Page 2 The relevant technical documentation has been compiled in accordance with Annex VII Part B. In response to a reasoned request by the national authorities, Edwards Ltd undertakes to provide relevant information on the partly completed machinery (via email).
Page 3 The relevant technical documentation has been compiled in accordance with Annex VII Part B. In response to a reasoned request by the national authorities, Edwards Ltd undertakes to provide relevant information on the partly completed machinery (via email).
Page 4 The relevant technical documentation has been compiled in accordance with Annex VII Part B. In response to a reasoned request by the national authorities, Edwards Ltd undertakes to provide relevant information on the partly completed machinery (via email).
Page 5: Table Of Contents
Check the leak tightness of the system ................26 3.16.1 General requirements ....................26 3.16.2 Use of flammable sealing/seals flush liquids: ATEX Category 1, 2 and 3 pumps ......27 © Edwards Limited 2012. All rights reserved. Page i Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 6 Recommended sealing liquid and seals flush supply system configurations: sheet 1 of 2 ....19 Recommended sealing liquid and seals flush supply system configurations: sheet 2 of 2 ....20 Page ii © Edwards Limited 2012. All rights reserved. Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 7 Maximum radial shaft loads and maximum inlet/outlet loads and moments ......... 16 Maintenance plan .......................32 Fault finding ......................34 Associated publications Publication title Publication number Vacuum pump and vacuum system safety P400-40-100 © Edwards Limited 2012. All rights reserved. Page iii Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 9: Introduction
Introduction Scope and definitions This manual provides installation, operation and maintenance instructions for the Edwards ATEX Category 1, 2 and 3 Liquid Ring Vacuum Pumps (abbreviated to ‘liquid ring pump(s)’ or ‘pump(s)’ in the remainder of this manual). ATEX Category 1 model pumps are denoted by a “S” suffix on the pump designation, ATEX Category 2 model pumps are denoted by a "C"...
Page 10: The Liquid Ring Pump
ATEX Category 1, 2 and 3 pumps are suitable for use only on the application for which this pump is supplied. Please consult Edwards for any changes in application. Page 2 © Edwards Limited 2012. All rights reserved. Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 11: Atex Directive: 94/9/Ec (Europe): Atex Category 1, 2 And 3 Pumps Only
The pump has a T4 classification and is suitable for pumping flammable materials that have an auto-ignition temperature greater than 135 C. Refer to Section 2 of this manual for the necessary pump operating conditions. © Edwards Limited 2012. All rights reserved. Page 3 Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 12 If you use a sealing liquid reservoir to provide the seals flush supplies, you may also fit an optional level  switch to the reservoir. Page 4 © Edwards Limited 2012. All rights reserved. Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 13: Normal Operation
Use of the pump with a sealing liquid or seals flush liquid which does not comply with the requirements of  Section 2.6. Pumping of, or use of, the pump in the presence of explosive dust atmospheres.  © Edwards Limited 2012. All rights reserved. Page 5 Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 14: Applications
You must ensure that the pump is suitable for your application. If you have any doubts as to the suitability of the pump for your application, refer to the Edwards guidelines on vacuum pump and vacuum system safety (see the Associated Publications at the end of the contents list at the front of this manual).
Page 15: Technical Data
Table 5 - Performance Data Maximum inlet capacity See Tables Maximum outlet pressure 1.1 bar absolute, 1.1 x 10 Shaft power See Tables © Edwards Limited 2012. All rights reserved. Page 7 Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 16 Performance specifies the suction capacity (m ) and shaft power (kW) for the specified inlet pressures (100 mbara, 200 mbara and 800 mbara). Page 8 © Edwards Limited 2012. All rights reserved. Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 17 Performance specifies the suction capacity (m ) and shaft power (kW) for the specified inlet pressures (33 mbara, 100 mbara and 200 mbara). © Edwards Limited 2012. All rights reserved. Page 9 Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 18: Noise And Vibration Data
ATEX Category 2 pumps configured for internal seals flush supplies and ATEX Category 3 pumps only require a sealing liquid supply, as the seals flush supplies are provided internally from the sealing liquid ring. Page 10 © Edwards Limited 2012. All rights reserved. Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 19: Use Of Water Based Sealing Liquid/Seals Flush Liquid
Maximum temperature ATEX Category 1 and 2 pumps configured for external seals flush supplies only. † Contact your supplier or Edwards if you want to use a sealing liquid with higher density/viscosity. © Edwards Limited 2012. All rights reserved. Page 11...
Page 20: Materials Of Construction
(SG) of 0.8. For specific applications, different materials of construction and seals flush liquid with lower specific heat and specific gravity please refer to the System Manual or consult Edwards. Materials of construction Table 12 - Materials of construction: process contact parts: EHR (S/C/D) pumps...
Page 21 Sealant Polyester urethane Polyester urethane Manual valves Ball Ball - Body Stainless steel 316 Stainless steel 316 - Seals PTFE PTFE © Edwards Limited 2012. All rights reserved. Page 13 Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 22 SHR1300, 2300, 1400, 2400, 1750, 2750, 1950, 2950, 21200, 11500, 21500, 11850, 21850 SHR12500, 22500 †† ≥ PREN = % Cr + 3.3% Mo + 16% N Page 14 © Edwards Limited 2012. All rights reserved. Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 23: Installation
The maximum loads and moments imposed by your system pipelines on the inlet and outlet connections must  not exceed those specified in Table © Edwards Limited 2012. All rights reserved. Page 15 Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 24: Safety
4100 SHR 1750S/C/D, 2750S/C/D, 1950S/C/D, 2950S/C/D 5800 SHR 21200S/C/D, 11500S/C/D, 21500S/C/D, 9400 1330 11850S/C/D, 21850S/C/D SHR 12500S/C/D, 22500S/C/D 14500 1770 1080 Page 16 © Edwards Limited 2012. All rights reserved. Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 25: Use Of Flammable Sealing/Seals Flush Liquids: Atex Category 1, 2 And 3 Pumps
Introduce an inert gas into the system to reduce the oxygen concentration,  Shut down the pump.  © Edwards Limited 2012. All rights reserved. Page 17 Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 26: Sealing Liquid And Seals Flush Supply System Design
Sections 3.5.2 3.5.4 for more details. The sealing and seals flush liquid supplies to the pump are clean.  Page 18 © Edwards Limited 2012. All rights reserved. Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 27: Recommended Sealing Liquid And Seals Flush Supply System Configurations: Sheet 1 Of 2
A750-04-880 Issue F Figure 1 - Recommended sealing liquid and seals flush supply system configurations: sheet 1 of 2 © Edwards Limited 2012. All rights reserved. Page 19 Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 28: Recommended Sealing Liquid And Seals Flush Supply System Configurations: Sheet 2 Of 2
Mandatory safety device on ATEX Category 1 pumps and ATEX Category 2 pumps which use a sealing liquid which has a boiling point higher than 100 C and total recirculation systems. Page 20 © Edwards Limited 2012. All rights reserved. Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 29: Total Recirculation Sealing Liquid And Seals Flush Supply System
If the pump is not to be used immediately, replace the protective covers. Store the pump in suitable conditions, as described in Section 6.1. © Edwards Limited 2012. All rights reserved. Page 21 Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 30: Locate The Pump
Fit your motor to the pump as specified in the manufacturer’s manual supplied with your motor. Ensure that the motor is suitable for use with the pump. Page 22 © Edwards Limited 2012. All rights reserved. Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 31: Fit A Drive And Transmission
Refer to the System Manual for the size and location of the earth (ground) stud on the pump. © Edwards Limited 2012. All rights reserved. Page 23 Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 32: Connect The Sealing Liquid And Seals Flush Pipelines
3.10 Connect the sealing liquid and seals flush pipelines WARNING Edwards cast iron pumps are treated with a corrosion inhibitor. To avoid contamination flush with a suitable fluid. WARNING On an ATEX Category 2 pump configured for internal seals flush supplies and on an ATEX Category 3...
Page 33: Connect The Process Outlet
If you have fitted a motor to the pump (as described in Section 3.8.2) connect the electrical supply to the motor in accordance with the manufacturer’s instructions. © Edwards Limited 2012. All rights reserved. Page 25 Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 34: Check The Direction Of Pump Rotation
Check the direction of rotation of the pump as follows: 1. Edwards preferred method would be to visibly check the fan on the motor for direction of rotation. If this is not possible, temporarily remove any guard over the drive coupling or belt.
Page 35: Use Of Flammable Sealing/Seals Flush Liquids: Atex Category 1, 2 And 3 Pumps
3.16.2 Use of flammable sealing/seals flush liquids: ATEX Category 1, 2 and 3 pumps Note: The acceptable pressure rise limit depends on your application. Contact Edwards for advice. If you use a flammable sealing/seals flush liquid (see Section 3.3), you must ensure that the system is sufficiently leak tight, otherwise there will be a risk of explosion during pump operation.
Page 37: Operation
4. On ATEX Category 1 and 2 pumps configured for external seals flush supplies only: open the seals flush supply valve (2). 5. Start the pump. 6. Open any isolation-valves (if fitted) in the process inlet pipelines. © Edwards Limited 2012. All rights reserved. Page 29 Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 38: Cavitation And Fluid Hammer
A750-04-880 Issue F 7. Slowly open the flow regulating valve (12) until the required sealing liquid flow rate is obtained. Refer to Tables and 7. Edwards recommend that a flow meter is installed. Cavitation and fluid hammer WARNING Do not operate the pump without sealing liquid in the pump. If you do, there may be a risk of explosion.
Page 39: Maintenance
The pump may have overheated if it was misused, if it malfunctioned or if it was in a fire. Edwards Material Safety Data Sheets for fluorinated materials used in the pump are available on request: contact your supplier or Edwards.
Page 40: Inspect The Pipelines And Connections
2. If your system incorporates a temperature transmitter, check that the temperature transmitter operates correctly to shut down your system when the temperature of the sealing liquid ring in the pump is too high. Page 32 © Edwards Limited 2012. All rights reserved. Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 41: Calibrate The Atex Safety Devices: Atex Category 1 And 2 Pumps
Table 16 to assist you in basic fault finding. If you are unable to rectify a fault when you use this guide, call your supplier or your nearest Edwards Service Centre for advice. © Edwards Limited 2012. All rights reserved.
Page 43: Storage And Disposal
Every 10 days or less, turn the pump drive shaft through three or four revolutions, to turn the pump and  prevent seizure. When required for use, prepare and install the pump as described in Section © Edwards Limited 2012. All rights reserved. Page 35 Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 44: Long-Term Storage
Safely dispose of the pump, sealing/seals flush liquid and any components in accordance with all local and national safety and environmental requirements. Page 36 © Edwards Limited 2012. All rights reserved. Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 45 Sealing/seals flush liquid that has been contaminated with dangerous substances.  Used water-based sealing liquid, or components contaminated with used water-based sealing liquid.  © Edwards Limited 2012. All rights reserved. Page 37 Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 47: Service And Spares
The majority of these centres employ Service Engineers who have undergone comprehensive Edwards training courses. Order spare parts and accessories from your nearest Edwards company or distributor. When you order, state for each part required: Model and Item Number of your equipment ...
Page 49: Safety Related Parts Of Control Systems
Your control circuit must incorporate a manual reset device which you must use to manually reset the system in order to start it again, after a trip has occurred. © Edwards Limited 2012. All rights reserved. Page 41 Edwards and the Edwards logo are trademarks of Edwards Limited.

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Edwards ATEX 1 EHR Instruction Manual

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