Model Drawings, CAD & Specs Availability Price
Poppet Valve, LoPro, NW25 ISO-KF, Angle Ports, Viton Seals, Pneumatic
$384
Poppet Valve, LoPro, NW25 ISO-KF, Angle Ports, Viton Seals, Manual
$347
Poppet Valve, LoPro, NW40 ISO-KF, Angle Ports, Viton Seals, Pneumatic
$420
Poppet Valve, LoPro, NW40 ISO-KF, Angle Ports, Viton Seals, Manual
$373
Poppet Valve, LoPro, NW40 ISO-KF, Inline Ports, Viton Seals, Pneumatic
$504
Poppet Valve, LoPro, NW40 ISO-KF, Inline Ports, Viton Seals, Manual
$457
Poppet Valve, LoPro, NW50 ISO-KF, Angle Ports, Viton Seals, Pneumatic
$578
Poppet Valve, LoPro, NW50 ISO-KF, Angle Ports, Viton Seals, Manual
$520
Poppet Valve, LoPro, NW50 ISO-KF, Inline Ports, Viton Seals, Pneumatic
$662
Poppet Valve, LoPro, NW50 ISO-KF, Inline Ports, Viton Seals, Manual
$599

Configuration Options

Description
   LPV1 Vacuum Isolation Valve, Single Stage, Low Profile

Specifications

  • Type
    Low-profile, Single-stage, Bellows-sealed Poppet Valve
  • Vacuum Range
    Atmosphere to 1.0 x 10-9 Torr
  • Port Size
    NW25, NW40, NW50
  • Helium Leak Rate
    1.0 x 10-9 std cc/sec
  • Cylinder Volume
    1.2 - 6.4 in3, depending on configuration
  • Cylinder Air Pressure
    90 psig ± 30 psig
  • Limit Switch Rating
    5A - 250 VAC
  • Single Pole, Single Throw
    5A - 30 VDC
  • Blow-By Pressure
    80 - 45 psi, depending on configuration
  • Actuation Time
    0.12 - 0.45 sec, depending on configuration
  • Maximum Internal Spring Closing Pressure
    38-60 psia, depending on configuration
  • Maximum Bakeout Temperature
    150°C
  • Typical Life
    1,000,000 cycles
  • Weight
    1.6 - 6.4 pounds, depending on configuration

Features

TIG Fusion-welded Bead-blasted Body

Another standard feature is a TIG fusion-welded, bead-blasted body made of high grade, corrosion resistant, 304 stainless steel for significantly fewer entrapment areas, resulting in less contaminant build-up. In the event of power or air loss, the pneumatic LoPro Valve will automatically spring to close. Actuation can be pneumatic or manual.

LoPro™ Valve Options

The LoPro Valve is available in both angle and inline versions. Port sizes include outside diameters of 1, 1½, and 2 inches and standard port interfaces include KF flanges, CF flanges, and weld stubs. For leak-tight operation, elastomer seals are available in Viton® for typical vacuum operating conditions, in Kalrez® or Chemraz® for higher temperature conditions and increased chemical resistance, and in Buna-N or Silicone.

How to Rebuild an Isolation Valve

Learn how to replace the internal assembly on an MKS Isolation valve. We will be replacing the internals in the MKS valve LPV1-40-AK-CNVS. The process is similar for most MKS isolation valves. 

Need help?

Contact an Applications Specialist by sending us an email