EDWARDS E2M40 Rotary Vacuum Pumps Instruction Manual

E2M40 and E2M80 Rotary Vacuum Pumps

Declaration of Conformity

Associated publications
Publication title
Vacuum pump and vacuum system safety
Vibration isolators
MF mist filters and CP catchpots
E1M40/80, E2M40/80 external oil filtration system adaptor kit
EOF external oil filtration system

Trademark credits
Fomblin® is a registered trademark of Ausimont SpA.

Introduction

1.1 Scope and definitions
This manual provides installation, operation and maintenance instructions for the Edwards E2M40 and E2M80 Rotary Vacuum Pumps. You must use your pump as specified in this manual.
Read this manual before you install and operate your pump. Important safety information is highlighted as WARNING and CAUTION instructions; you must obey these  instructions. The use of WARNINGS and CAUTIONS is defined below.

WARNING
Warnings are given where failure to observe the instruction could result in injury or death to people.
CAUTION
Cautions are given where failure to observe the instruction could result in damage to the equipment, associated equipment and process.
The units used throughout this manual conform to the SI international system of units of measurement.
The following warning symbols are on the pump:
Warning – refer to accompanying documentation.
Warning – risk of electric shock.
Warning – hot surfaces.

Warning – do not block the pump outlet.
Figure 1 – The rotary vacuum pump (E2M40 shown)

1.2 Description
Note: The following section refers to Figure 1 unless stated otherwise.
The E2M40 and E2M80 pumps are two-stage oil-sealed, high-vacuum pumps designed for reliable, long-term operation in both laboratory and industrial environments. A  four-pole three-phase motor provides direct-drive through a flexible coupling. The pumps are free-standing mounted on steel runners.
These pumps are not suitable for use with Hazardous substances. These would include:

• Pyrophoric gases.
• Oxygen >25% unless filled with PFPE oil.
• Chemically Active e.g. Azide forming compounds
• Corrosive gases.
• Flammable mixtures.

The E2M pumps are two-stage, oil-sealed, sliding-vane vacuum pumps.
Lubrication is provided by a sliding vane oil pump. Oil is drawn into the pump through a wire mesh strainer. The oil is pumped to a spring-loaded distributor valve. The  distributor valve directs a lightly-pressurised supply of oil to the main vacuum-pump and by-passes the excess back to the oil reservoir. Some of the excess oil is re-directed  through a large area, fine-pore filter and some through a relief-valve. When you switch off an E2M40 or E2M80 pump with the gas ballast control closed, the spring loaded  distributor valve provides oil and air subpack protection.
You can inspect the level and condition of oil in the oil box through an oil- level sight-glass (7). An oil filler-plug (6) is fitted at the top of the oil box. An oil drain-tap (8) is  fitted at the bottom of the oil box.
The inlet-port flange (4) is compatible with ISO40 or NW40 fittings. The outlet-port (5) has an NW25 flange.
The gas-ballast control (11) allows you to control the introduction of gas- ballast when pumping high vapour loads.
Refer to Section 1.3 for more information about gas-ballast.
Refer to Section 7 for details about vibration isolators and other recommended accessories.

1.3 Gas-ballast
To pump high vapour loads, gas-ballast is delivered into the pump to prevent condensation of the vapour carried by the pumped gases. This system reduces oil contamination and pump corrosion caused by condensed vapour from the pumped gases.
You can introduce air or an inert gas into the low vacuum stage of the pump through the gas-ballast inlet (Figure 6, item 3). A filter/silencer is fitted in the gas-ballast system,  to prevent the entry of dust into the pump and to improve silencing. You can control the gas-ballast either manually or remotely.
For manual control, use the gas-ballast control (Figure 6, item 4). The pumps are supplied with an open gas-ballast inlet (Figure 6, item 3). If you leave this inlet open to the  atmosphere, then:

• With the gas-ballast control (Figure 6, item 4) open, when you switch the pump off, the pressure inside the pump will rise to atmospheric pressure
• With the gas-ballast control closed, when you switch off the E2M40 and E2M80 pumps the vacuum will be maintained inside the pump.

For remote control, fit a solenoid-operated gas-ballast control valve (available as an accessory from Edwards, refer to Section 7) to the gas- ballast inlet and open the gas- ballast control. Connect the gas-ballast valve to your control system so that the valve is closed when the pump is switched off and if the electrical supply to the pump is interrupted. Under these circumstances, when the pump is switched off, the vacuum will be maintained inside the pump.
For more information about the use of gas-ballast, refer to Sections 3.9 and 4.1.

Technical data

2.1 Operating and storage conditions
Table 1 – Operating and storage conditions

Normal surface temperature of the pump (at ultimate vacuum, ambient temperature of 20°C) Maximum humidity (operation) Ambient temperature range (storage)| 50 to 70°C
90% RH
-30 to 70°C

2.2 Performance
Note: Where total pressures are shown in the technical data tables, measurements were taken using an untrapped total pressure capacitance diaphragm gauge on a header, as specified by Pneurop standards.

Table 2 – Performance data

| | E2M40| E2M80
---|---|---|---
Maximum Displacement m3111
50 Hz electrical supply| | 43.| 80
60 Hz electrical supply| | 51.| 96
Maximum Speed – Pneurop 50 Hz electrical supply| | 37| 74
60 Hz electrical supply| | 44| 90
Motor rotational speed
50 Hz electrical supply| | 1,410| 1,420
60 Hz electrical supply| | 1,720| 1,720
Ultimate vacuum without gas-ballast| mbar| 1 x 10-4| 1 x 10-4
(partial pressure)| Pa| (1 x 10-2)| (1 x 10-2)
without gas-ballast| mbar| 1 x 10-3| 1 x 10-3
(total pressure)| Pa| (1 x 10-1)| (1 x 10-1)
with full gas-ballast| mbar| 5 x 10-3| 5 x 10-3
(partial pressure)| Pa| (5 x 10-1)| (5 x 10-1)
Maximum permitted outlet pressure| bar gauge| 0.5| 0.5
(at full pump throughput)| Pa| (1.5 x 105)| (1.5 x 105)
Maximum water vapour inlet pressure| mbar| 7| 5
| Pa| (7 x 102)| (5 x 102)
Maximum water vapour pumping rate| kgh-1| 0.2| 0.3
Maximum gas-ballast flow| m3111| 2.| 1.

Figure 2 – Dimensions E2M40 (mm)

Figure 3 – Dimensions E2M80 (mm)

2.3 Mechanical data
Table 3 – Mechanical data

Dimensions
Degree of protection (IEC 34-5:1981) Pump inlet-port
Pump outlet-port| See Figure 2 (E2M40 pumps) and Figure 3 (E2M80 pumps)
IP55
15040 or NW40
25 mm flange, suitable for NW25 fittings
| E2M40| E2M80
Maximum mass (kg)
Vibration severity t
Noise level at 1 metre (dB(A)) ‘| 81.5
Class 1C
65| 130
Class 1C
70

†Measured at the inlet port to ISO 2372 (1974)

• The noise level was measured in accordance with ISO2151 and with the pump running at ultimate pressure.
  Running at higher inlet pressures will increase the noise level.

2.4 Electrical data: three-phase motors
For motor wiring information refer to the wiring diagram supplied in the motor terminal box. You can configure the dual voltage motors to operate with either the high range or low range electrical supply.
We endeavour to supply dual voltage motors preset to the highest of the selectable voltages.
For motor current information please refer to the motor rating plate.

Table 4 – Electrical data (three-phase motors)

2.5 Lubrication data
Note: An Edwards Health and Safety Data Sheet for the following oil is available on request.

Table 5 – Lubrication data
Hydrocarbon pumps: recommended oil
PFPE prepared pumps: recommended oil
Fomblin 06/6

4.0

To operate your pump when the ambient temperature is outside the limits specified in Section 2.1, or to optimise your pump performance when you pump condensable  vapours, you may need to use a different oil.

Installation

3.1 Safety
You must ensure that the pump is suitable for your application. If you have any doubt about the suitability of the pump for your application, refer to the Edwards guidelines  on vacuum pump and vacuum system safety. (See Associated Publications at the end of the contents list).

WARNING
Obey the safety instructions given below and take note of appropriate precautions. If you do not, you may cause injury to people and damage to equipment.
Obey the safety instructions listed below when you install the pump, especially when you connect the pump into an existing system. Details of specific safety precautions are  given at the appropriate point in the instructions.

• The installation of your pump must be performed by a suitably trained and supervised technician
• Wear the appropriate safety-clothing when you come into contact with contaminated components
• Vent and purge your vacuum system before you start installation work
• Ensure that the installation technician is familiar with the safety procedures which relate to the pump-oil and the products handled by the pumping system. Take suitable  precautions to avoid the inhalation of oil mist and excessive skin contact with pump-oil, as prolonged exposure can be harmful
• Disconnect the other components in the pumping system from the electrical supply so that they cannot be operated accidentally.

3.2 System design considerations
Consider the following points when you design your pumping system:

• Use a suitable valve to isolate the pump from your vacuum system if you need to allow the pump to warm up before you pump condensable vapours or if you need to  maintain vacuum when the pump is switched off
• Avoid high levels of heat input to the pump from the process gases, otherwise the pump may overheat and seize
• If you use the pump in a high ambient temperature and have a high gas throughput, the temperature of the pump-body may exceed 70°C. You must fit suitable guards to  prevent contact with hot surfaces
• Make sure that the exhaust pipeline cannot become blocked. If you have an exhaust-isolation valve, make sure that you cannot operate the pump with the valve closed
• Provide for a purge of inert gas when you shut down the pumping system, to dilute dangerous gases to safe concentrations. A suitable solenoid operated gas-ballast  control valve for introduction of purge-gas into the pump is available as an accessory (see Section 7).

3.3 Unpack and inspect
WARNING
Use suitable lifting equipment to move the pump. The mass of the pump is between 81.5 kg and 130 kg.

• Remove all packing materials, remove the pump from its packing-box, remove the protective covers from the inlet and outlet-ports and inspect the pump
• If the pump is damaged, notify your supplier and the carrier in writing within three days; state the Item Number of the pump together with your order number and your  supplier’s invoice number
• Retain all the packing materials for inspection
• Do not use the pump if it is damaged.
  Check that your package contains the following items:

3.4 Locate the pump

WARNING
Use suitable lifting equipment to move the pump. The mass of the pump is between 81.5 kg and 130 kg.
Attach your mechanical lifting equipment to the lifting eyes on the pump.
Provide a firm, level platform for the pump. Locate the pump so that the oil- level sight-glass is visible and the oil filler-plug, oil drain-tap, disposable oil-filter and gas-ballast  control are accessible.
If your pump will be located inside an enclosure, make sure that there is adequate ventilation at both ends of the pump, so that the ambient temperature around the pump  does not exceed 40°C. There must be a minimum space of 25 mm between the pump and the enclosure walls.
In addition, ensure that the location of the pump and the intended routing of connecting parts i.e. process line, exhaust line and power cables will not present any physical  hazards. For example: trip hazards to personnel.

3.5 Fill the pump with oil
3.5.1 Recommended pump oils

WARNING
If you use a hyrdocarbon oil in this pump, you must not use the pump to process oxygen in concentrations greater than 25% in volume. If you do, there is a risk of fire or  explosion in the oil-box of the pump.
When the ambient temperature is 12°C or higher, we recommend that you use Edwards Ultragrade 70 oil. This tested and proven oil will give you the best performance,  maintenance intervals and pump life. Otherwise, use another oil with the specification VG ISO 68.
If you pump oxygen or other dangerous gases and vapours, you must use a chemically inert and stable oil (such as perfluoropolyether). For information on pumping  dangerous gases and vapours, refer to the Edwards guidelines on vacuum pump and vacuum system safety (see Associated Publications at the end of the contents list).

3.5.2 Filling procedure
Fill the pump with oil as described below. Refer to Figure 1 for the item numbers in brackets.

1. Remove the oil filler-plug (6).

2. Pour oil into the pump until the oil-level just reaches the MAX mark on the bezel at the top of the sight-glass (7).
   If the oil-level goes above the MAX mark, open the oil drain-tap (8) and drain the excess oil from the pump.
   When the oil-level falls to the MAX mark close the oil drain-tap (8).

3. After a few minutes, recheck the oil-level. If the oil-level is now below the MAX mark, pour more oil into the pump.

4. Refit the oil filler-plug (6). Tighten the plug firmly by hand. Do not over-tighten.

3.6 Electrical installation: three-phase motors
3.6.1 Connect the pump to your electrical supply
WARNING
Ensure that the electrical installation of your pump-motor conforms with your local and national safety requirements. It must be connected to a suitably fused and protected  electrical supply and a suitable earth point.

CAUTION
If your pump-motor can be used with more than one voltage range, you must ensure that the motor is configured for your electrical supply voltage. If you do not, you may damage the motor.
Note: The pump will restart automatically when the electrical supply is restored after an interruption. If you do not want the pump to restart automatically, use electrical  control equipment which must be reset manually.
We recommend that you connect the electrical supply to the motor through a starter or circuit breaker which has thermal over-current protection which can be adjusted to  suit the full-load current ratings shown on the motor rating plate. The fuse ratings must be calculated by a qualified person. The supplier of your thermal over-current  protection device may specify fuse ratings to ensure correct operation of the over-current protection device. Ensure that the fuse you use is suitable for the rated currents given on the motor rating plate.

1. Remove the cover from the motor terminal box.

2. Check your electrical supply voltage and frequency. If necessary, configure the motor to operate with your electrical supply. For motor wiring information refer to the  wiring diagram supplied in the motor terminal box.

3. Remove the 20 mm diameter plugs from the cable-entry hole that you will use for the electrical supply cable.
   Choose the most suitable hole for your application.

4. Fit a suitable cable-gland and nut to the entry hole. After the supply cable is fitted, the cable-gland must be a protective seal to the standard of IP44 in IEC 529 or better.

5. Pass the motor electrical supply cable through the cable-gland.

6. Connect the cables to the terminals as shown in the wiring diagram supplied in the motor terminal box.

3.6.2 Check the direction of rotation
CAUTION
Ensure that the pump-motor rotates in the correct direction. If it does not, the pump and your vacuum system can become pressurised.

1. Watch the motor cooling-fan through the motor fan-cover.
2. Switch-on the electrical supply to the motor for a few seconds and switch off.
3. Check that the motor cooling-fan rotates in the direction shown by the arrow on the motor mounting-plate. If the direction of rotation is incorrect:
   • Isolate the pump from the electrical supply
   • Remove the terminal-box cover and swap wires L1 and L3. Refer to the wiring diagram supplied in the motor terminal box
   • Refit the cover to the terminal-box
   • Connect the pump to the electrical supply
   • Check the direction of rotation again.

3.7 Connect the pump inlet to your system
3.7.1 General information
Take note of the following information when you connect the pump to your vacuum system Refer to Section 7 for details of the accessories mentioned below.

• For optimum pumping speeds, ensure that the pipeline connected to the inlet-port is as short as possible and has an internal diameter not less than the inlet-port diameter
• Support the vacuum pipelines to prevent loading of the coupling-joints
• If necessary, incorporate flexible bellows in your system pipelines to reduce the transmission of vibration and to prevent loading of coupling-joints. If you use flexible  bellows, you must ensure that you use bellows which have a maximum pressure rating which is greater than the highest pressure that can be generated in your system.  You must use flexible bellows if your pump is mounted on vibration isolators. We recommend that you use Edwards flexible bellows
• Use a suitable valve to isolate the pump from your vacuum system if you need to pump condensable vapours or maintain vacuum when the pump is switched off
• Use a suitable inlet catchpot if you pump condensable vapours or if you use the pump for very dusty applications
• Ensure that sealing surfaces are clean and scratch-free.

3.7.2 Connect to ISO40 fittings
From the fitting pack, use the two ISO40 Co-seal halves, ISO40/NW40 seal, bolts and washers. Connect to your ISO40 fittings as shown in Figure 4.
3.7.3 Connect to NW40 fittings
From the fitting pack, use the NW40 Co-seal half, ISO40/NW40 seal, the ‘C’ clamp and the bolts and washers. Connect to your NW40 fittings as shown in Figure 5.

Figure 4 – Connect inlet to ISO40 fittings

Figure 5 – Connect inlet to NW40 inlet fittings

3.8 Connect the pump outlet to your system

WARNING
Connect the pump outlet to a suitable treatment plant to prevent the discharge of dangerous gases and vapours to the surrounding atmosphere. Use a catchpot to prevent the  drainage of contaminated condensate back into the pump.
Connect the pump outlet-port to your outlet accessories or your exhaust treatment plant using the NW25 fittings (supplied).
Take note of the following information before you connect to the pump outlet. Refer to Section 7 for details of the accessories mentioned below.

• The exhaust system must be configured so that the maximum pressure at the pump outlet does not exceed 0.5 bar gauge (1.5 bar absolute, 1.5 x 10 5 Pa) at full pump  throughput.
• In the following circumstances, we recommend that you fit an oil mist filter to the pump outlet:
• if you use the pump with the gas-ballast control open
• if you operate the pump with an inlet pressure greater than 10 mbar for extended periods or
• if you frequently pump down from atmospheric pressure.
  The mist filter will trap the oil exhausted from the pump: you can re-use the oil if it is not contaminated.

3.9 Gas-ballast inlet connection
As shown in Figure 6 (item 3), the pump has two gas-ballast inlets. We supply the pump with a blanking plug fitted to one inlet: the other inlet is open. You can use either of  the inlets, but you must fit the blanking plug to the inlet you do not use.
You can leave the gas-ballast inlet open to the atmosphere. Alternatively, you can fit a gas-ballast control valve, (available as an accessory, refer to Section 7), for remote  control of the gas-ballast supply. In either case, adjust the gas-ballast control (Figure 6, item 4), to regulate the flow rate of the gas-ballast supply.
For more information about the use of gas-ballast, refer to Sections 1.3 and 4.1.

3.10 Leak-test the system
Leak-test the system and seal any leaks found after you have installed the pump, to prevent leakage of substances out of the system and leakage of air into the system.

Operation

WARNING
We do not recommend that you use the E2M40 and E2M80 pumps to pump hazardous substances.
4.1 Gas-ballast control
Use the gas-ballast control (Figure 1, item 11) to change the amount of air (or inert gas) introduced into the lowvacuum stage of the pump.
Use of the gas-ballast will prevent the condensation of vapours in the pump.
The condensed vapours would contaminate the oil.
Turn the gas-ballast control fully clockwise:

• to achieve ultimate vacuum
• to pump dry gases.

Turn the gas-ballast control anti-clockwise to open. Use the gas-ballast control fully open:

• to pump high concentrations of condensable vapour
• to decontaminate the oil.
  When you operate the pump with the gas-ballast control open, there is an increased rate of oil loss from the pump.

4.2 Start-up procedure
WARNING
Do not block the pump outlet or allow the outlet pressure to rise above 1.5 bar absolute. If you do, the oil box may fracture: this may cause injury to people.
If the oil is contaminated, or if the pump temperature is below 13°C, or if the supply voltage is more than 10% below the lowest voltage specified for the motor, the pump may operate at reduced speed for a few minutes.

1. Switch on the electrical supply to the pump.

2. Check that the oil-level in the sight-glass drops slightly (3 to 5 mm) after start-up. This shows that the pump has primed with oil.

3. If the pump fails to prime, operate the pump with the inlet open to atmosphere for approximately 30 seconds.
   Then isolate the inlet and check that the oil-level drops 3-5 mm.

4. If you want to achieve ultimate vacuum, to pump condensable vapours or to decontaminate the pump oil, refer to the procedures in Sections 4.3, 4.4 and 4.5 respectively. Otherwise, open the vacuum system isolation-valve.

© Edwards Limited 2014. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.

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