Shopping Cart ( 0 )

Billing and Shipping

Sales and Service

855 882 2886

0 Items

$0.00

Welcome on our site:

Guest

Get started with your repair: Generate service RMA Request a repair estimate

‹ › ×

Edwards EXT 70H Turbo Pump, DN 100 ISO, 24 V, B72226991 / B722-26-991

Condition: Remanufactured

Call us for Availability

Item#:PN07013

Mfr Part#:B72226991 / B722-26-991

Manufacturer:Edwards Vacuum

Price upon request

Request a repair estimate Request sales quote Financing available

Remanufactured Edwards EXT 70H Turbo Pump, DN 100 ISO, 24 V, B72226991 / B722-26-991

Features:

Inlet flange: DN 100 ISO
Outlet flange: KF 16
24 V
Ready for install

Overview
Specifications
Manuals
Service & Repair

Edwards EXT 70H Turbo Pump, DN 100 ISO, 24 V, B72226991 / B722-26-991

EXT 70H / B72226991 Overview:

The Edwards EXT 70H, EXT70Hi, EXT250H and EXT250Hi pumps are compound vacuum pumps that combine a turbomolecular pump and a drag pump on a single shaft.

This Edwards EXT70H / B72226991 turbomolecular pump is made from a multi-stage axial-flow turbine which is optimised for operation in molecular flow conditions. The drag pump is made from pumping channels formed by plane rotating disks. The drag pump is designed for operation at higher pressures than conventional turbomolecular pumps. The light alloy rotor is machined from one piece to form the angled blades of the turbomolecular pump and the disks of the drag pump. The rotor blades rotate between angled stator blades which are supported by spacer rings.

The Edwards Rotor and Stator blades have an open structure at the pump inlet, and a more closed structure at the outlet. This configuration gives an optimum combination of pumping speed and compression when pumping gases of both high and low molecular weight. For the blades to be effective, their speed must be close to the thermal velocity of the gas.

The Rotor of the EXT70H therefore rotates at up to 90000 r min-1, and the rotor of the EXT250H/Hi therefore rotates at up to 60000 r min-1.

Process Gas from the inlet is compressed through each of the bladed stages of the turbomolecular pump and transferred to the drag pump. In the drag pump stages, the gas is further compressed as it is pumped around the channels formed by the separation of the disks. The inlet and outlet of each channel is separated by a close-running seal which diverts the gas through a port to the next channel, or to the pump outlet.

It is recommend that wherever possible, you cool the pump by forced-air or water-cooling. You must use water - cooling in any of the following operating conditions:

Backing pressure > 10 mbar (1000 Pa) and interstage flow 20sccm (0.3mbar l s-1, 30 Pa l s-1)
Backing pressure > 8 mbar (800 Pa) and interstage flow 30sccm (0.5mbar l s-1, 50 Pa l s-1)

The EXT 70H rotating assembly is supported at the inlet end by a frictionless magnetic bearing and by a precision ceramic ball bearing at the outlet end. The ball bearing is lubricated from an oil reservoir and wick mechanism. It is recomended to use inlet-screen and inlet-strainer protect the pump against damage which would be caused by debris which enters the pump. The inlet-screen also protects you from the sharp blades in the pump.

The EXT pump has a vent-port that you can use to vent the pump and your vacuum system to atmospheric pressure. The vent-port introduces vent gas part way up the pump rotor; this ensures maximum cleanliness. The pump is supplied with a manual vent-valve fitted to the vent-port. Edwards EXT pump can fited with optional vent-port adaptor and purge restrictor to the purge-port to control the flow rate of the purge gas and to filter the gas supply.

A&J Vacuum also repair / rebuild and service all Edwards EXT 70H / B72226991 with Edwards Scroll Vacuum Pumps Edwards Turbo Pump repair, Edwards Vane Pumps and all other Edwards Vacuum Rotary Vane pumps. Please contact us for information on service program or click here http://www.ajvs.com/service.php to go to our Service page. We also offer Emergency service upon request. For more information Please contact A&J Vacuum Services at 973-249-0854.

This item is non-returnable/non-refundable

Edwards EXT 70H Turbo Pump, DN 100 ISO, 24 V, B72226991 / B722-26-991

Edwards EXT 70H Technical Data:

Inlet Flange, DN100 ISO-K (No Groove)
Outlet FLange DN25 KF-F
Ultimate Pressure 5 x 10-9 mbar
Puming Speed for N2 65 l/sec
Minimum backing pump requirement 0.6 m3h
Recomended backing pump Edwards E2M0.7
Nominal Rotational Speed: 90000 r min

Edwards_EXT70 EXT70H Edwards EXT250 EXT250H Manual.pdf Edwards_Vacuum_EXT70_EXT250_Manual.pdf

Get started with your repair:

We can have a repair estimate ready for your equipment within the hour of submission.

Request a repair estimate

Start your equipment repair process by creating a Service RMA.

Generate Service RMA

High quality service guaranteed

A&J Vacuum Services provides repairs on all types of High Vacuum equipment. We perform Turbomolecular Pump repair, Turbo Pump Repair, Dry Pump repair, Vacuum Pump repair and Mass Spectrometer repair. Our highly trained technicians will deliver the highest quality service and satisfaction.

We operate at our own full service repair facility which allows us to quickly and economically perform all repairs in a timely manner. Our advandced machinery enables us to handle all facets of the service and repair process. AJVS utilizes industry standard vibration analysis equipment and advanced testing equipment to troubleshoot and minimize all equipment failures. Our in-house machine shop is capable of machining various components, prototypes and housing conversions as needed.

AJVS repair process:

Repair Steps

Full incoming inspection and run up time check, vibration check, drive inspection.
Full disassembly of the pump, decontamination and cleaning.
Pump is balanced utilizing state-of-the-art equipment from the world leader in equipment balancing and analysis to reduce noise and vibrations and extend bearings life.
Assembly and replacement of all necessary parts such as shafts, bushings, bearings, sleeves, O-rings, gaskets, seals, wicks, etc. Only parts that meet or surpass OEM specifications are used to ensure dependable highest quality service and log pump life.
Final test and leak check. The pump in fully assembled condition is checked for vacuum seal. Leak test to 1 x 10 -Mbar l/s. Vibrations are analyzed and test data is digitally recorded.

We can repair your: