LoPro™ Low-profile, Single-stage, Bellows-sealed Poppet Valves

LoPro™ single-stage bellows vacuum isolation valves have a small footprint that fits easily into existing, and new, vacuum systems. A formed stainless-steel bellows prevents outgassing, virtual leaks, and particle entrapment between bellows convolutions that extends the valves life cycle over a conventional O-ring shaft sealed valve. The bellows' stroke length is optimized to assure a long cycle life while maintaining high conductance.

NW25 - NW50
HV pump and line isolation applications
1,000,000 cycle rating (clean environments)

See All Features

Description	Compatibility	Body Configuration	Actuation	Port Size	Price
LPV1-25-AK-CNVSPoppet Valve, LoPro, NW25 ISO-KF, Angle Ports, Viton Seals, Pneumatic	UNIVERSAL	Angle	Pneumatic	NW25	$447
LPV1-25-AK-MNVNPoppet Valve, LoPro, NW25 ISO-KF, Angle Ports, Viton Seals, Manual	UNIVERSAL	Angle	Manual	NW25	$404
LPV1-40-AK-CLVSPoppet Valve, LoPro, NW40 ISO-KF, Angle Ports, Viton Seals, Pneumatic, w/Limit Switch	UNIVERSAL	Angle	Pneumatic	NW40	$545
LPV1-40-AK-CNVSPoppet Valve, LoPro, NW40 ISO-KF, Angle Ports, Viton Seals, Pneumatic	UNIVERSAL	Angle	Pneumatic	NW40	$488
LPV1-40-AK-MNVNPoppet Valve, LoPro, NW40 ISO-KF, Angle Ports, Viton Seals, Manual	UNIVERSAL	Angle	Manual	NW40	$433
LPV1-40-IK-CLVSPoppet Valve, LoPro, NW40 ISO-KF, Inline Ports, Viton Seals, Pneumatic, w/Limit Switch	UNIVERSAL	Inline	Pneumatic	NW40	$670
LPV1-40-IK-CNVSPoppet Valve, LoPro, NW40 ISO-KF, Inline Ports, Viton Seals, Pneumatic	UNIVERSAL	Inline	Pneumatic	NW40	$585
LPV1-40-IK-MNVNPoppet Valve, LoPro, NW40 ISO-KF, Inline Ports, Viton Seals, Manual	UNIVERSAL	Inline	Manual	NW40	$530
LPV1-50-AK-CLKSPoppet Valve, LoPro, NW50 ISO-KF, AnglePorts, Kalrez Seals, Pneumatic, w/Limit Switch	UNIVERSAL	Angle	Pneumatic		$1,491
LPV1-50-AK-CNVSPoppet Valve, LoPro, NW50 ISO-KF, Angle Ports, Viton Seals, Pneumatic	UNIVERSAL	Angle	Pneumatic	NW50	$670

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Configuration Options

Please see the LPV1 datasheet for product 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.

Accessories

Replacement Solenoids

Description	Compatibility	Price
100008164Solenoid Valve, Replacement, 24 VAC, 50-60 Hz, 6 Watt	UNIVERSAL	$221
100008165Replacement Solenoid Valve, 120 VAC, 50-60 Hz, 7.5 Watt	UNIVERSAL	$233
100008167Solenoid Valve, Replacement, 220-240 VAC, 50-60 Hz, 7.5 Watt	UNIVERSAL	$189
100008163Solenoid Valve, Replacement, 24 VDC, 7 Watt	UNIVERSAL	$179
100008166Solenoid Valve, Replacement, 208 VAC, 50-60 Hz, 7.5 Watt	UNIVERSAL	$153
100008539Solenoid Valve, Replacement, 12 VDC, 7 Watt	UNIVERSAL	$111

Valve Seals

Description	Compatibility	Price
100002219Kalrez Seal Set, LoPro Single-Stage Valve, NW40 Port	UNIVERSAL	$662
100002215Buna-N Seal Set, LoPro Single-Stage Valve, NW25 Port	UNIVERSAL	$24.26
100002220Kalrez Seal Set, LoPro Single-Stage Valve, NW50 Port	UNIVERSAL	$745
100002218Kalrez Seal Set, LoPro Single-Stage Valve, NW25 Port	UNIVERSAL	$448
100002221Silicone Seal Set, LoPro Single-Stage Valve, NW25 Port	UNIVERSAL	$37
100002216Buna-N Seal Set, LoPro Single-Stage Valve, NW40 Port	UNIVERSAL	$24.26
100002217Buna-N Seal Set, LoPro Single-Stage Valve, NW50 Port	UNIVERSAL	$51
100002222Silicone Seal Set, LoPro Single-Stage Valve, NW40 Port	UNIVERSAL	$37
100002223Silicone Seal Set, LoPro Single-Stage Valve, NW50 Port	UNIVERSAL	$60
100002224Viton Seal Set, High Cycle and LoPro Single-stage Valves, NW25 Port	UNIVERSAL	$47
100002225Viton Seal Set, High Cycle and LoPro Single-stage Valves, NW40 Port	UNIVERSAL	$45
100009145Chemraz Seal Set, LoPro Single-Stage Valve, NW25 Port	UNIVERSAL	$299
100009146Chemraz Seal Set, LoPro Single-Stage Valve, NW40 Port	UNIVERSAL	$426
100002226Viton Seal Set, High Cycle and LoPro Single-stage Valves, NW50 Port	UNIVERSAL	$23.10
100009147Chemraz Seal Set, LoPro Single-Stage Valve, NW50 Port	UNIVERSAL	$567

Limit Switches

Description	Compatibility	Price
100002227Limit Switch Kit, High Cycle, LoPro, LoPro 2-stage Valves, NW25	UNIVERSAL	$168
100002228Limit Switch Kit, High Cycle, LoPro, and LoPro 2-stage Valves, NW40	UNIVERSAL	$158
100002229Limit Switch Kit, High Cycle, LoPro, and LoPro 2-stage Valves, NW50	UNIVERSAL	$168

Internal Rebuild Kits

Description	Compatibility	Price
100010103Valve Rebuild Kit with Viton Seal Set, Lopro Single and Two Stage Pneumatic Valves, NW40	UNIVERSAL	$385
100010128Valve Rebuild Kit with Viton Seal Set, LoPro Single-Stage Manual Valves, NW25	UNIVERSAL	$285
100010102Valve Rebuild Kit with Viton Seal Set, Pneumatic Lopro Single & 2-stage Valves, NW50	UNIVERSAL	$616
100010104Valve Rebuild Kit with Viton Seal Set, Lopro Single, 2-stage Pneumatic Valves, NW25	UNIVERSAL	$368
100010129Valve Rebuild Kit with Viton Seal Set, LoPro Single-Stage Manual Valves, NW40	UNIVERSAL	$399
100010130Valve Rebuild Kit with Viton Seal Set, LoPro Single-Stage Manual Valves, NW50	UNIVERSAL	$882

Resources

LoPro™ Low-profile, Single-stage, Bellows-sealed Poppet Valves

LoPro™ Low-profile, Single-stage, Bellows-sealed Poppet Valves

Configuration Options

Specifications

Features

TIG Fusion-welded Bead-blasted Body

LoPro™ Valve Options

How to Rebuild an Isolation Valve

Accessories

Replacement Solenoids

Valve Seals

Limit Switches

Internal Rebuild Kits

Resources

Literature

Manuals

Drawings & CADs

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