Agilent / Varian Vacuum Pump Isolation Valve (VPI)

Penerangan

Agilent Vacuum Pump Isolation Valves (VPI) are electrically connected in parallel with the mechanical pump, and close rapidly when power is interrupted to prevent oil backstreaming or particle migration into your vacuum system. These protection valves also vent the pump from the inlet side to push any debris towards the outlet, preventing it from being swept into the system when pumping is restarted. The body design and right-angle configuration provide maximum conductance.

Features

• Reliable, repeatable seals with lock-over-center mechanism
• Fast-acting, immediate protection of your vacuum system from oil or contaminant migration in case of power failure, valve closes in less than 30 milliseconds
• Provides venting of the pump at the pump inlet, flow direction is maintained; oil/debris are not swept into the system
• Remains closed until pump inlet pressure returns to system pressure for continued protection and easy restart
• Operates with atmospheric pressure and is activated upon loss of electrical power, no compressed air required for operation
• Provides maximum conductance, no reduction of pumping speed

Specifications

Materials	Body: 6061-T6 aluminum Piston: 2024 aluminum Seals: viton
Leak rate	Body and seal: < 1 x 10-9 std cc/sec He
Closing time	< 30 milliseconds
Power	7 watts @ 115 VAC
Conductance	NW25 – 13 l/s NW40 – 33 l/s
Temperature range	Valve: 0˚ to 100˚ C Solenoid 0˚ to 50˚ C

Ordering Information
 
Description          Voltage               Part Number                    Shipping Weight lb (kg)
NW25                  120 VAC              VPI251205060                 5.0 (2.3)
                            133 VAC              VPI251335060                 5.0 (2.3)
                            220 VAC              VPI252205060                 5.0 (2.3)
                            266 VAC              VPI252665060                 5.0 (2.3)
NW40                  120 VAC              VPI401205060                 5.0 (2.3)
                            133 VAC              VPI401335060                 5.0 (2.3)
                            220 VAC              VPI402205060                 5.0 (2.3)
                            266 VAC              VPI402665060                 5.0 (2.3)
 
Accessories
Piston kit, NW25                            VPI25PSTNKIT                  1.0 (0.5)
Rebuild kit, NW25                          VPI25RBLDKIT                  1.0 (0.5)
Piston kit, NW40                            VPI40PSTNKIT                  1.0 (0.5)
Rebuild kit, NW40                          VPI40RBLDKIT                  1.0 (0.5)
 
Replacement solenoid
                            120 VAC              VPISOL1205060               1.0 (0.5)
                            133 VAC              VPISOL1335060               1.0 (0.5)
                            220 VAC              VPISOL2205060               1.0 (0.5)
                            266 VAC              VPISOL2665060               1.0 (0.5)
Seals kit, NW25/40                          VPISEALSKIT                  1.0 (0.5)

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