Edwards nEXT300D turbomolecular high vacuum pumps with an ISO-K 100 inlet flange have a pumping speed of 300 liters per second (l/s) and an ultimate pressure of 8 x 10 mbar (6 x 10 Torr). This nEXT300D pump has an ISO KF-25 exhaust foreline flange. Optional inlet screens (coarse or fine) are available. The nEXT300D series turbo pumps require 24 to 48 VDC input power at a maximum of 200 Watts (normal operation is typically less than 160 Watts). A permanently attached DB15 combination power and control cable is standard on the pump. All nEXT300D turbo pumps have a compact onboard controller with RS232 and RS485 interfaces, five status LED's, and a 3-pin Phoenix connector socket to control either an air-cooling fan or solenoid vent valve. All that is needed is a suitable power supply and start/stop logic. For laboratory use we recommend the 200 Watt Edwards Turbo Instrument Controller (TIC) or the Turbo Active Gauge (TAG) which can both act as a power supply and remote controller for the smaller sized nEXT pumps. We also offer a variety of optional accessories, including the TIC and TAG, forced air and water cooling kits, along with solenoid operated vent valves. This nEXT300D turbo pump has Edwards part number B82200100.

Edwards nEXT300D turbomolecular high vacuum pumps with a DN100 CF, Conflat CF 6.0 inch inlet flange have a pumping speed of 300 liters per second (l/s) and an ultimate pressure of 5 x 10 mbar (3.7 x 10 Torr). This nEXT300D pump has an ISO KF-25 exhaust foreline flange. Optional inlet screens (coarse or fine) are available.The nEXT300D series turbo pumps require 24 to 48 VDC input power at a maximum of 200 Watts (normal operation is typically less than 160 Watts). A permanently attached DB15 combination power and control cable is standard on the pump. All nEXT300D turbo pumps have a compact onboard controller with RS232 and RS485 interfaces, five status LED's, and a 3-pin Phoenix connector socket to control either an air-cooling fan or solenoid vent valve. All that is needed is a suitable power supply and start/stop logic. For laboratory use we recommend the 200 Watt Edwards Turbo Instrument Controller (TIC) or the Turbo Active Gauge (TAG) which can both act as a power supply and remote controller for the smaller sized nEXT pumps. We also offer a variety of optional accessories, including the TIC and TAG, forced air and water cooling kits, along with solenoid operated vent valves. This nEXT300D turbo pump has Edwards part number B82200200.

This Edwards TAG Turbo and Active Gauge Controller Kit includes the TAG controller, the matching 200W power supply, and a 2 meter long, US plug 5-15P to C13 Connector, IEC 60320 input power cord for the power supply. The TAG is a small, low cost, 24 VDC pumping system controller, suitable for a wide range of vacuum applications. The TAG provides a serial interface for displaying the turbo pump's speed and can power nEXT85D, nEXT240D, nEXT300D, or nEXT400D turbo pumps. The TAG can also control and display vacuum pressure of a single active gauge, and run a fan for forced air cooling of the pump. The TAG controller is compatible with all nEXT turbo pumps and APG, AIM, ASG, or WRG vacuum gauges. The TAG's push button interface allows the user to easily switch between between pump speed or vacuum pressure, shown on the large LED display. This compact 24 VDC controller is ideal for use on benchtops and is also well suited for mobile platforms where space is limited, yet functionality and reliability are essential.

The TAG is a small, low cost, 24 VDC pumping system controller, suitable for a wide range of vacuum applications. The TAG provides a serial interface for displaying the turbo pump's speed and can power nEXT85D, nEXT240D, nEXT300D, or nEXT400D turbo pumps. The TAG can also control and display vacuum pressure of a single active gauge, and run a fan for forced air cooling of the pump. The TAG controller is compatible with all nEXT turbo pumps and APG, AIM, ASG, or WRG vacuum gauges. The TAG's push button interface allows the user to easily switch between between pump speed or vacuum pressure, shown on the large LED display. This compact 24 VDC controller is ideal for use on benchtops and is also well suited for mobile platforms where space is limited, yet functionality and reliability are essential.

This is an input power cord (mains cable), 115 VAC, 2 meters long, with US plug 5-15P to C13 Connector. It is used on the Edwards TIC turbo instrument controller and TIC relay box. It is also used on the 200W external power supply (part number P106340) which powers the TAG turbo and active gauge controller (the TAG does not have an internal power supply). Replaces Edwards part number B8J200813, A50507000 or D40013120, and is the same as our part number P102990). This power cord is used on:Edwards TIC Turbo Instrument Controller Edwards TIC Relay BoxEdwards TAG Turbo and Active Gauge Controller 200W External Power SupplyEdwards nXDSi Dry Scroll Pumps

This Edwards 200W external power supply provides 24 VDC @8A to the TAG turbo and active gauge controller (part number P106255). The external 200W power supply is required since the TAG does not have its own internal power supply. This power supply comes with a permanently attached cable that connects to the TAG controller. The input AC cable for this power supply is sold separately (part number P106129). This 200W Edwards power supply has part number D39592800. This power supply is for:TAG Turbo and Active Gauge Controller

This Edwards 100W TIC Turbo Instrument Controller can control and power a nEXT85D turbo pump, and is recommended to control nEXT730D, nEXT930D, or nEXT1230H turbo pumps. This controller does not have active gauge support and is Edwards part number D39711000. Edwards TIC Turbo Instrument Controllers are a series of 100W and 200W compact controllers which can be used with any Edwards nEXT turbo pump. The TIC connects to, and controls, the turbo pump through the pump's attached DB15 serial cable. Through the same cable, the TIC is able to supply 24 VDC pump power to the smaller nEXT pumps. TIC controllers feature a large, clear graphics display, easy-to-use control interface via a touch sensitive keypad, and a DB9 RS232/485 interface for control and data monitoring on a remote PC with user supplied software. TIC's require 100-240 VAC input power and can be rack mounted or used on a benchtop. The TIC does not come with an input power cable (we suggest part number P106129). All TIC variants have support for a forced air cooling fan and a solenoid operated vent valve through a Phoenix 4 pin connector (mating end is supplied with the TIC). When connected through the DB25 logic interface to an Edwards Relay Box (part number P106081), the TIC can also control a backing pump, flange heater band, and a 24 VDC backing line valve. TIC controllers are available with or without active gauge control. Supported gauges are APG, AIM, ASG, or WRG series gauges (IGC and Barocel models are not supported).

This Edwards 200W TIC Turbo Instrument Controller can control and power a nEXT230D, nEXT300D, or nEXT400D turbo pump. This controller does not have active gauge support and is Edwards part number D39712000. Edwards TIC Turbo Instrument Controllers are a series of 100W and 200W compact controllers which can be used with any Edwards nEXT turbo pump. The TIC connects to, and controls, the turbo pump through the pump's attached DB15 serial cable. Through the same cable, the TIC is able to supply 24 VDC pump power to the smaller nEXT pumps. TIC controllers feature a large, clear graphics display, easy-to-use control interface via a touch sensitive keypad, and a DB9 RS232/485 interface for control and data monitoring on a remote PC with user supplied software. TIC's require 100-240 VAC input power and can be rack mounted or used on a benchtop. The TIC does not come with an input power cable (we suggest part number P106129). All TIC variants have support for a forced air cooling fan and a solenoid operated vent valve through a Phoenix 4 pin connector (mating end is supplied with the TIC). When connected through the DB25 logic interface to an Edwards Relay Box (part number P106081), the TIC can also control a backing pump, flange heater band, and a 24 VDC backing line valve. TIC controllers are available with or without active gauge control. Supported gauges are APG, AIM, ASG, or WRG series gauges (IGC and Barocel models are not supported).

This Edwards 100W TIC Turbo Instrument Controller can control and power a nEXT85D turbo pump, and is recommended to control nEXT730D, nEXT930D, or nEXT1230H turbo pumps. This controller has support for up to 3 active vacuum gauges and is Edwards part number D39721000. Edwards TIC Turbo Instrument Controllers are a series of 100W and 200W compact controllers which can be used with any Edwards nEXT turbo pump. The TIC connects to, and controls, the turbo pump through the pump's attached DB15 serial cable. Through the same cable, the TIC is able to supply 24 VDC pump power to the smaller nEXT pumps. TIC controllers feature a large, clear graphics display, easy-to-use control interface via a touch sensitive keypad, and a DB9 RS232/485 interface for control and data monitoring on a remote PC with user supplied software. TIC's require 100-240 VAC input power and can be rack mounted or used on a benchtop. The TIC does not come with an input power cable (we suggest part number P106129). All TIC variants have support for a forced air cooling fan and a solenoid operated vent valve through a Phoenix 4 pin connector (mating end is supplied with the TIC). When connected through the DB25 logic interface to an Edwards Relay Box (part number P106081), the TIC can also control a backing pump, flange heater band, and a 24 VDC backing line valve. TIC controllers are available with or without active gauge control. Supported gauges are APG, AIM, ASG, or WRG series gauges (IGC and Barocel models are not supported).

This Edwards 200W TIC Turbo Instrument Controller can control and power a nEXT230D, nEXT300D, or nEXT400D turbo pump. This controller has support for up to 3 active vacuum gauges and is Edwards part number D39722000. Edwards TIC Turbo Instrument Controllers are a series of 100W and 200W compact controllers which can be used with any Edwards nEXT turbo pump. The TIC connects to, and controls, the turbo pump through the pump's attached DB15 serial cable. Through the same cable, the TIC is able to supply 24 VDC pump power to the smaller nEXT pumps. TIC controllers feature a large, clear graphics display, easy-to-use control interface via a touch sensitive keypad, and a DB9 RS232/485 interface for control and data monitoring on a remote PC with user supplied software. TIC's require 100-240 VAC input power and can be rack mounted or used on a benchtop. The TIC does not come with an input power cable (we suggest part number P106129). All TIC variants have support for a forced air cooling fan and a solenoid operated vent valve through a Phoenix 4 pin connector (mating end is supplied with the TIC). When connected through the DB25 logic interface to an Edwards Relay Box (part number P106081), the TIC can also control a backing pump, flange heater band, and a 24 VDC backing line valve. TIC controllers are available with or without active gauge control. Supported gauges are APG, AIM, ASG, or WRG series gauges (IGC and Barocel models are not supported).

This Edwards 1m long extension power and communication cable connects between any nEXT turbo pump and either the TIC (Turbo Instrument Controller) or TAG (Turbo & Active Gauge Controller). It is used to increase the distance between the pump and controller. This extension cable has D-Sub 15 pin connectors on either end, one male, one female. Edwards nEXT Turbo pumps have a permanently attached 0.3m long power and communication cable. This 1 meter extension cable increases the overall length of the pump-to-controller cable to 1.3 meters. This 1 meter long extension power and communication cable has Edwards part number D39700835. This Edwards extension power and communication cable is compatible with TIC or TAG Controllers and these nEXT pumps:

This Edwards 2m long extension power and communication cable connects between any nEXT turbo pump and either the TIC (Turbo Instrument Controller) or TAG (Turbo & Active Gauge Controller). It is used to increase the distance between the pump and controller.This extension cable has D-Sub 15 pin connectors on either end, one male, one female. Edwards nEXT Turbo pumps have a permanently attached 0.3m long power and communication cable. This 2 meter extension cable increases the overall length of the pump-to-controller cable to 2.3 meters. This 2 meter long extension power and communication cable has Edwards part number D39700836. This Edwards extension power and communication cable is compatible with TIC or TAG Controllers and these nEXT pumps:

This Edwards 5m long extension power and communication cable connects between any nEXT turbo pump and either the TIC (Turbo Instrument Controller) or TAG (Turbo & Active Gauge Controller). It is used to increase the distance between the pump and controller. This extension cable has D-Sub 15 pin connectors on either end, one male, one female. Edwards nEXT Turbo pumps have a permanently attached 0.3m long power and communication cable. This 5 meter extension cable increases the overall length of the pump-to-controller cable to 5.3 meters. This 5 meter long extension power and communication cable has Edwards part number D39700837. This Edwards extension power and communication cable is compatible with TIC or TAG Controllers and these nEXT pumps:

This Edwards logic interface cable interconnects a TIC Turbo Instrument Controller and a TIC Relay box. This male-to-female 25 pin D-Sub cable is 2 meters long. It allows the TIC to control powering the backing pump, an intake flange heater band (bakeout band), and an isolation valve. This logic interface cable has Edwards part number D39700833. This logic interface cable is compatible with:TIC Turbo Instrument Controller (P106075, P105874, P106074, P106128)TIC Relay Box (P106081) The TIC Turbo Instrument Controller and TIC Relay Box are compatible with these turbo pumps:nEXT85DnEXT240DnEXT300DnEXT400DnEXT730DnEXT930DnEXT1230H

This Edwards TIC relay box acts as the control interface between the TIC controller and the mains backing pump, turbo pump flange heater band, and a backing line isolation valve. This relay box does not have any setpoint relays. The relay box can be used on a benchtop or rack mounted alongside the TIC controller. The TIC relay box connects to the the TIC Turbo Instrument Controller with the 25 pin D-Sub, logic interface cable (part number P1012534). The relay box accepts input power from100-240 VAC. The Edwards input (mains) power cable (part number P106129) is sold separately. Maximum rating for powering the backing pump is 240 VAC@10A, and 240 VAC@1A for the heater (bakeout) band. The backing pump and heater band connections are individually fused. Note that the backing pump and heater band must be rated for the same voltage as the input voltage supplied to the relay box. The isolation valve control has a maximum rating of 24 VDC@0.5A and is energised whenever the backing pump is running. This Edwards relay box has part number D39711805.

This Edwards ACX axial air cooling fan unit is designed to mount to the bottom of nEXT240D, nEXT300D, or nEXT400D series turbo pumps and provides forced-air flow colinear to the pump’s shaft. It operates on 24 VDC. While it can be powered by the pump's Phoenix connector socket (the pump includes a mating connector), this cooling fan is typically powered by a remote TIC turbo instrument controller, a TAG turbo and active gauge controller, or a suitable user supplied 24 VDC power supply, leaving the pump's connector socket available to power a solenoid vent valve (TAV5/TAV6). This kit includes a 3 meter long power cable with an unterminated (bare wire) end, and screws for attaching the fan unit to the bottom of the pump. This ACX axial air cooling fan kit has Edwards part number B58053185.

This Edwards ACX axial air cooling fan unit is designed to mount to the bottom of nEXT240D, nEXT300D, or nEXT400D series turbo pumps and provides forced-air flow colinear to the pump’s shaft. It operates on 24 VDC. It has an attached 0.25 meter long cable, terminated with a Phoenix plug which is connected directly into the pump's Phoenix connector socket. A similar axial fan unit (part number P105875) comes with a 3 meter long unterminated cable which is a better solution for powering the fan unit via a remote TIC or TAG controller, or a suitable user supplied 24 VDC power supply, leaving the pump's connector socket available to power a solenoid vent valve (TAV5/TAV6). This kit includes screws for attaching the fan unit to the bottom of the pump. This ACX radial air cooling fan kit has Edwards part number B58053180.

This Edwards ACX radial air cooling fan unit is used on nEXT240D, 300D, and 400D series turbo pumps and provides air flow perpendicular to the pump. It operates on 24 VDC. It has an attached 0.25 meter long cable, terminated with a Phoenix plug which is connected directly into the pump's Phoenix connector socket. A similar radial fan unit (part number P106343) comes with a 3 meter long unterminated cable which is a better solution for powering the fan unit via a remote TIC or TAG controller, or a suitable user supplied 24 VDC power supply, leaving the pump's connector socket available to power a solenoid vent valve (TAV5/TAV6). This kit includes screws for attaching the fan's 90 degree mounting bracket to the bottom of the pump. This ACX radial air cooling fan kit has Edwards part number B58053170.

This Edwards ACX radial air cooling fan unit is used on nEXT240D, 300D, and 400D series turbo pumps and provides air flow perpendicular to the pump. It operates on 24 VDC. While it can be powered by the pump's Phoenix connector socket (the pump includes a mating connector), this cooling fan is typically powered by a remote TIC turbo instrument controller, a TAG turbo and active gauge controller, or a suitable user supplied 24 VDC power supply, leaving the pump's connector socket available to power a solenoid vent valve (TAV5/TAV6). This kit includes a 3 meter long power cable with an unterminated (bare wire) end, and screws for attaching the fan's 90 degree mounting bracket to the bottom of the pump. This ACX radial air cooling fan kit has Edwards part number B58053175.

This Edwards fine screened centering ring (1.1 mm mesh) is used to filter the vacuum flow and keep objects from being sucked into the nEXT240D or nEXT300D turbo pump. This screen has a flange size of ISO-K 100. Depending on the gas used, some pump speed reduction will occur when using this screen. This coarse screen centering ring has Edwards part number B81000809. This screen fits:nEXT240D with ISO-K 100 inlet, Edwards pump part number: B81200100nEXT300D with ISO-K 100 inlet, Edwards pump part number: B82200100

This Edwards fine screened centering ring (1.1 mm mesh) is used to filter the vacuum flow and keep objects from being sucked into the nEXT240D or nEXT300D turbo pump. This screen has a flange size of CF 6.0 Inch. Depending on the gas used, some pump speed reduction will occur when using this screen. This coarse screen centering ring has Edwards part number B80000822. This screen fits:nEXT240D with CF 6.0 inch (DN 100 CF) inlet, Edwards pump part number: B81200200nEXT300D with CF 6.0 inch (DN 100 CF) inlet, Edwards pump part number: B82200200

This Edwards coarse screened centering ring (2.5 mm mesh) is used to filter the vacuum flow and keep objects from being sucked into the nEXT240D or nEXT300D turbo pump. This screen has a flange size of ISO-K 100. Depending on the gas used, some pump speed reduction will occur when using this screen. This coarse screen centering ring has Edwards part number B81000808. This screen fits:nEXT240D with ISO-K 100 inlet, Edwards pump part number: B81200100nEXT300D with ISO-K 100 inlet, Edwards pump part number: B82200100

This Edwards coarse screened centering ring (2.5 mm mesh) is used to filter the vacuum flow and keep objects from being sucked into the nEXT240D or nEXT300D turbo pump. This screen has a flange size of CF 6.0 Inch. Depending on the gas used, some pump speed reduction will occur when using this screen. This coarse screen centering ring has Edwards part number B80000821. This screen fits:nEXT240D with CF 6.0 inch (DN 100 CF) inlet, Edwards pump part number: B81200200nEXT300D with CF 6.0 inch (DN 100 CF) inlet, Edwards pump part number: B82200200

This Edwards water cooling unit fits the nEXT240D, nEXT300D and nEXT400D turbo pumps. It attaches to the side of the pump with two included bolts. This water cooling block has push-fit connectors for the supply and discharge hoses (10mm OD plastic hose). The hose connections may be unscrewed and removed to make use of the integrated G 1/4” threads. This water cooling kit is needed when using a flange heater band with a CF flanged pump. Edwards nEXT turbo pumps also benefit from water cooling when there are high gas throughputs, cyclic operations and/or high ambient temperatures. In order to ensure long trouble-free operation, the cooling water must be clean and not contain any oils, greases or suspended solids. This water cooling kit has Edwards part number B80000815.

This is a 110 VAC Edwards intake flange heater for nEXT240D and nEXT300D turbo pumps with CF 6.0 inch flange (DN 100 CF). This heater band may only be used on CF flanged pumps outfitted with either water cooling or forced air cooling. The intake flange may be baked up to 120 °C if the turbo pump is water cooled, 115 °C if the turbo pump is fan cooled. This flange heater (bakeout band) accelerates the degassing of the pump to enable it to achieve lower pressures. It may also be used to protect the pump from condensation of contaminants. The band heater has an attached power cable terminated with a C19 power entry plug (male C19). This Edwards intake bakeout flange heater band has part number B58052773.

This is a 240 VAC Edwards intake flange heater for the nEXT240D and nEXT300D turbo pumps with CF 6.0 inch flange (DN 100 CF). This heater band may only be used on CF flanged pumps outfitted with either water cooling or forced air cooling. The intake flange may be baked up to 120 °C if the turbo pump is water cooled, 115 °C if the turbo pump is fan cooled. This flange heater (bakeout band) accelerates the degassing of the pump to enable it to achieve lower pressures. It may also be used to protect the pump from condensation of contaminants. The band heater has an attached power cable terminated with a C19 power entry plug (male C19). This Edwards intake bakeout flange heater band has part number B58052774.

This is an Edwards replacement oil cartridge for nEXT240D, nEXT300D, and nEXT400D turbo pumps. It provides lubrication for the bearing at the bottom of the pump. The oil cartridge can be replaced on-site. Access to the oil cartridge is gained by removal of the four M4 button head screws at the base of the pump. Removal and replacement of the oil cartridge requires Edwards oil cartridge tool kit (part number P106357). Download the service toolkit manual and follow the instructions for replacing the oil cartridge. This Edwards oil cartridge has part number B80000811. It is recommended to change both the oil cartridge and bearing at the same time. The bearing and oil cartridge (part number P106360) can be serviced on-site by any service engineer trained by Edwards, and also requires the Edwards bearing replacement tool kit (part number P106358). Follow the service interval specified in the pump's manual.

This Edwards oil cartridge tool kit is required to remove and replace the oil cartridge on nEXT240D, nEXT300D, and nEXT400D turbo pumps. The oil cartridge can be replaced on-site. Download the service toolkit manual and follow the instructions for replacing the oil cartridge. This Edwards oil cartridge has part number B80000811. It is recommended to change both the oil cartridge and bearing at the same time. The bearing and oil cartridge (part number P106360) can be serviced on-site by any service engineer trained by Edwards, and also requires the Edwards bearing replacement tool kit (part number P106358). Follow the service interval specified in the pump's manual.

This is an Edwards replacement bearing and oil cartridge kit for nEXT240D, nEXT300D, and nEXT400D turbo pumps. The bearing and oil cartridge are typically replaced at the same time and can be serviced on-site by any service engineer trained by Edwards. Replacement of the oil cartridge and bearing requires the Edwards oil cartridge tool kit (part number P106357) and the bearing tool kit (part number P1012517). Follow the service interval specified in the pump's manual and the installation instructions in the service manual. This Edwards bearing and oil cartridge kit has part number B80000810. This bearing and oil cartridge kit fits:Fits: nEXT240D turbo pumpsFits: nEXT300D turbo pumps

This is an Edwards bearing replacement tool kit for nEXT240D, nEXT300D, and nEXT400D turbo pumps. This tool kit is required to remove and replace the bearing at the base of the pump. To access the bearing, the oil cartridge must be removed first which requires the Edwards oil cartridge tool kit (part number P106357). The bearing and oil cartridge can be serviced on-site by any service engineer trained by Edwards. Follow the service interval specified in the pump's manual and the installation instructions in the service manual. This Edwards bearing and oil cartridge kit has part number B80000805. This bearing tool kit is used on:nEXT240D turbo pumpsnEXT300D turbo pumps

This Edwards TAV5 venting valve can be installed in any nEXT85D, 240D, 300D, 400D, 730D, 930D, or 1230H series turbo pump. This is a normally open (N/O) valve and operates at 24 VDC. This TAV5 solenoid valve comes with a 3 meter long power cable with unterminated (bare wire) end, and has a BSPP (G) 1/8" fitting for connection into the pump's vent port. This valve can be powered by the pump's accessory port (nEXT85D, nEXT730D, nEXT930D, or nEXT1230H) or the connector socket (nEXT240D, nEXT300D, or nEXT400D), a TIC Controller, or a separate 24 VDC power supply. For use with an 85D, 730D, 930D or 1230H nEXT turbo pump, the accessory extension cable is required (part number P1012520), which has an accessory connector on one end and is unterminated on the other. For 240D, 300D, and 400D pump's, the valve's unterminated power wire is connected to the pump's (24 VDC) Phoenix connector socket (the mating phoenix plug is supplied with the pump). This normally open valve can be used as a power failure venting valve. When a power failure occurs, this valve closes and vents the pump and the forevacuum line and thus keeps oil vapor from diffusing back from the forevacuum line.

This Edwards TAV6 venting valve can be installed in any nEXT85D, 240D, 300D, 400D, 730D, 930D, or 1230H series turbo pump. This valve operates at 24 VDC, and comes with a 3 meter long power cable with unterminated (bare wire) end, and has a BSP 1/8" fitting for connection into the pump's vent port. This valve can be powered by the pump's accessory port (nEXT85D, nEXT730D, nEXT930D, or nEXT1230H) or the 3 pin Phoenix connector socket on nEXT240D, nEXT300D, or nEXT400D pumps (the mating phoenix plug is supplied with the pump). This valve can also be directly wired to a TIC Controller, or a separate 24 VDC power supply. For use with a nEXT85D, nEXT730D, nEXT930D, or nEXT1230H turbo pump, the accessory extension cable is required (part number P1012520), which has an accessory connector on one end and is unterminated on the other. This normally open valve can be used as a power failure venting valve. When a power failure occurs, this valve closes and vents the pump and the forevacuum line and thus keeps oil vapor from diffusing back from the forevacuum line. .

This Edwards vent or purge port adapter is used to convert the G 1/8 inch (BSPP) female vent or purge port on any nEXT turbo pump to a KF10 NW10 flange. An alternative vent valve to the TAV5 or TAV6 valve, or a vent or purge pipeline may then be fitted to this flange. This vent port adapter is supplied with a flow restrictor (when used on the vent port), and an O-ring to seal the adapter to the pump. When used in the purge port, use the PRX10 purge restrictor (part number P1012056) to limit the purge gas flow rate. This adapter has Edwards part number B58066011. This Edwards vent port adapter is suitable for use on these turbo pumps:nEXT85DnEXT240DnEXT300D

This Edwards purge gas restrictor sets the flow rate of dry purge gas through the purge port on any nEXT turbo pump. An inert purge gas is used to protect the bearing and motor from corrosion. In order to use this purge restrictor, the vent port adapter (part number P106356) must be used to adapt the G 1/8" (BSPP) purge port to a KF10 NW10 flange. The PRX10 purge restrictor is a special KF10 centering ring with a filter and restrictor built in. This purge restrictor, as supplied, is adjusted to restrict the flow rate of dry nitrogen at a supply pressure of 25 sccm. The supply pressure can be increased to increase the flow rate. Please see the accessories download for additional information about calibrating the purge restrictor. This Edwards PRX10 purge restrictor has part number B58065001.