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

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Configuration Options
Features
Accessories
Resources
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Overview

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)

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Products

	Description	Compatibility	rankScore	Body Configuration	Actuation	Port Size	Availability	Price
LPV1-25-AK-CNVS Poppet Valve, LoPro, NW25 ISO-KF, Angle Ports, Viton Seals, Pneumatic $425 15 Weeks	LPV1-25-AK-CNVS Poppet Valve, LoPro, NW25 ISO-KF, Angle Ports, Viton Seals, Pneumatic	UNIVERSAL	1.0	Angle	Pneumatic	NW25	15 Weeks	$425
LPV1-25-AK-MNVN Poppet Valve, LoPro, NW25 ISO-KF, Angle Ports, Viton Seals, Manual $384 15 Weeks	LPV1-25-AK-MNVN Poppet Valve, LoPro, NW25 ISO-KF, Angle Ports, Viton Seals, Manual	UNIVERSAL	1.0	Angle	Manual	NW25	15 Weeks	$384
LPV1-40-AK-CLVS Poppet Valve, LoPro, NW40 ISO-KF, Angle Ports, Viton Seals, Pneumatic, w/Limit Switch $519 15 Weeks	LPV1-40-AK-CLVS Poppet Valve, LoPro, NW40 ISO-KF, Angle Ports, Viton Seals, Pneumatic, w/Limit Switch	UNIVERSAL	1.0	Angle	Pneumatic	NW40	15 Weeks	$519
LPV1-40-AK-CNVS Poppet Valve, LoPro, NW40 ISO-KF, Angle Ports, Viton Seals, Pneumatic $464 15 Weeks	LPV1-40-AK-CNVS Poppet Valve, LoPro, NW40 ISO-KF, Angle Ports, Viton Seals, Pneumatic	UNIVERSAL	1.0	Angle	Pneumatic	NW40	15 Weeks	$464
LPV1-40-AK-MNVN Poppet Valve, LoPro, NW40 ISO-KF, Angle Ports, Viton Seals, Manual $412 15 Weeks	LPV1-40-AK-MNVN Poppet Valve, LoPro, NW40 ISO-KF, Angle Ports, Viton Seals, Manual	UNIVERSAL	1.0	Angle	Manual	NW40	15 Weeks	$412
LPV1-40-IK-CLVS Poppet Valve, LoPro, NW40 ISO-KF, Inline Ports, Viton Seals, Pneumatic, w/Limit Switch $638 15 Weeks	LPV1-40-IK-CLVS Poppet Valve, LoPro, NW40 ISO-KF, Inline Ports, Viton Seals, Pneumatic, w/Limit Switch	UNIVERSAL	1.0	Inline	Pneumatic	NW40	15 Weeks	$638
LPV1-40-IK-CNVS Poppet Valve, LoPro, NW40 ISO-KF, Inline Ports, Viton Seals, Pneumatic $557 15 Weeks	LPV1-40-IK-CNVS Poppet Valve, LoPro, NW40 ISO-KF, Inline Ports, Viton Seals, Pneumatic	UNIVERSAL	1.0	Inline	Pneumatic	NW40	15 Weeks	$557
LPV1-40-IK-MNVN Poppet Valve, LoPro, NW40 ISO-KF, Inline Ports, Viton Seals, Manual $504 15 Weeks	LPV1-40-IK-MNVN Poppet Valve, LoPro, NW40 ISO-KF, Inline Ports, Viton Seals, Manual	UNIVERSAL	1.0	Inline	Manual	NW40	15 Weeks	$504
LPV1-50-AK-CLKS Poppet Valve, LoPro, NW50 ISO-KF, AnglePorts, Kalrez Seals, Pneumatic, w/Limit Switch $1,420 15 Weeks	LPV1-50-AK-CLKS Poppet Valve, LoPro, NW50 ISO-KF, AnglePorts, Kalrez Seals, Pneumatic, w/Limit Switch	UNIVERSAL	1.0	Angle	Pneumatic		15 Weeks	$1,420
LPV1-50-AK-CNVS Poppet Valve, LoPro, NW50 ISO-KF, Angle Ports, Viton Seals, Pneumatic $638 15 Weeks	LPV1-50-AK-CNVS Poppet Valve, LoPro, NW50 ISO-KF, Angle Ports, Viton Seals, Pneumatic	UNIVERSAL	1.0	Angle	Pneumatic	NW50	15 Weeks	$638
LPV1-50-AK-MNVN Poppet Valve, LoPro, NW50 ISO-KF, Angle Ports, Viton Seals, Manual $574 15 Weeks	LPV1-50-AK-MNVN Poppet Valve, LoPro, NW50 ISO-KF, Angle Ports, Viton Seals, Manual	UNIVERSAL	1.0	Angle	Manual	NW50	15 Weeks	$574
LPV1-50-IK-CNVS Poppet Valve, LoPro, NW50 ISO-KF, Inline Ports, Viton Seals, Pneumatic $731 15 Weeks	LPV1-50-IK-CNVS Poppet Valve, LoPro, NW50 ISO-KF, Inline Ports, Viton Seals, Pneumatic	UNIVERSAL	1.0	Inline	Pneumatic	NW50	15 Weeks	$731
LPV1-50-IK-MNVN Poppet Valve, LoPro, NW50 ISO-KF, Inline Ports, Viton Seals, Manual $661 15 Weeks	LPV1-50-IK-MNVN Poppet Valve, LoPro, NW50 ISO-KF, Inline Ports, Viton Seals, Manual	UNIVERSAL	1.0	Inline	Manual	NW50	15 Weeks	$661

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Configuration Options

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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	Avail.	Price
100008164 Solenoid Valve, Replacement, 24 VAC, 50-60 Hz, 6 Watt	UNIVERSAL	15 Weeks	$210
100008165 Replacement Solenoid Valve, 120 VAC, 50-60 Hz, 7.5 Watt	UNIVERSAL	14 Weeks	$221
100008167 Solenoid Valve, Replacement, 220-240 VAC, 50-60 Hz, 7.5 Watt	UNIVERSAL	15 Weeks	$180
100008163 Solenoid Valve, Replacement, 24 VDC, 7 Watt	UNIVERSAL	14 Weeks	$168
100008166 Solenoid Valve, Replacement, 208 VAC, 50-60 Hz, 7.5 Watt	UNIVERSAL	15 Weeks	$145
100008539 Solenoid Valve, Replacement, 12 VDC, 7 Watt	UNIVERSAL	15 Weeks	$105

Valve Seals

Description	Compatibility	Avail.	Price
100002219 Kalrez Seal Set, LoPro Single-Stage Valve, NW40 Port	UNIVERSAL	4 Weeks	$630
100002215 Buna-N Seal Set, LoPro Single-Stage Valve, NW25 Port	UNIVERSAL	4 Weeks	$23.10
100002220 Kalrez Seal Set, LoPro Single-Stage Valve, NW50 Port	UNIVERSAL	4 Weeks	$709
100002218 Kalrez Seal Set, LoPro Single-Stage Valve, NW25 Port	UNIVERSAL	4 Weeks	$426
100002221 Silicone Seal Set, LoPro Single-Stage Valve, NW25 Port	UNIVERSAL	3 Weeks	$35
100002216 Buna-N Seal Set, LoPro Single-Stage Valve, NW40 Port	UNIVERSAL	4 Weeks	$23.10
100002217 Buna-N Seal Set, LoPro Single-Stage Valve, NW50 Port	UNIVERSAL	4 Weeks	$22
100002222 Silicone Seal Set, LoPro Single-Stage Valve, NW40 Port	UNIVERSAL	4 Weeks	$35
100002223 Silicone Seal Set, LoPro Single-Stage Valve, NW50 Port	UNIVERSAL	4 Weeks	$57
100002224 Viton Seal Set, High Cycle and LoPro Single-stage Valves, NW25 Port	UNIVERSAL	4 Weeks	$27
100002225 Viton Seal Set, High Cycle and LoPro Single-stage Valves, NW40 Port	UNIVERSAL	4 Weeks	$24
100009145 Chemraz Seal Set, LoPro Single-Stage Valve, NW25 Port	UNIVERSAL	4 Weeks	$284
100009146 Chemraz Seal Set, LoPro Single-Stage Valve, NW40 Port	UNIVERSAL	4 Weeks	$405
100002226 Viton Seal Set, High Cycle and LoPro Single-stage Valves, NW50 Port	UNIVERSAL	4 Weeks	$22
100009147 Chemraz Seal Set, LoPro Single-Stage Valve, NW50 Port	UNIVERSAL	4 Weeks	$540

Limit Switches

Description	Compatibility	Avail.	Price
100002227 Limit Switch Kit, High Cycle, LoPro, LoPro 2-stage Valves, NW25	UNIVERSAL	4 Weeks	$160
100002228 Limit Switch Kit, High Cycle, LoPro, and LoPro 2-stage Valves, NW40	UNIVERSAL	4 Weeks	$150
100002229 Limit Switch Kit, High Cycle, LoPro, and LoPro 2-stage Valves, NW50	UNIVERSAL	4 Weeks	$160

Internal Rebuild Kits

Description	Compatibility	Avail.	Price
100010103 Valve Rebuild Kit with Viton Seal Set, Lopro Single and Two Stage Pneumatic Valves, NW40	UNIVERSAL	4 Weeks	$366
100010128 Valve Rebuild Kit with Viton Seal Set, LoPro Single-Stage Manual Valves, NW25	UNIVERSAL	4 Weeks	$271
100010102 Valve Rebuild Kit with Viton Seal Set, Pneumatic Lopro Single & 2-stage Valves, NW50	UNIVERSAL	4 Weeks	$586
100010104 Valve Rebuild Kit with Viton Seal Set, Lopro Single, 2-stage Pneumatic Valves, NW25	UNIVERSAL	4 Weeks	$350
100010129 Valve Rebuild Kit with Viton Seal Set, LoPro Single-Stage Manual Valves, NW40	UNIVERSAL	4 Weeks	$380
100010130 Valve Rebuild Kit with Viton Seal Set, LoPro Single-Stage Manual Valves, NW50	UNIVERSAL	4 Weeks	$840

Resources

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

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

Overview

Products

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

LoPro™ Soft-start Bellows Vacuum Isolation Valves

Cv™ Compact Bellows Vacuum Isolation Valves

CRV Corrosion Resistant Vacuum Isolation Valves

ECv Electric Bellows Vacuum Isolation Valves

LoPro™ Soft-start Bellows Vacuum Isolation Valves

Cv™ Compact Bellows Vacuum Isolation Valves

CRV Corrosion Resistant Vacuum Isolation Valves

ECv Electric Bellows Vacuum Isolation Valves

Need help?

Product Comparison

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

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

Overview

Products

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

Related Products

Need help?