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DQSV Pneumatic Diaphragm Cut-Off Valve
DQSV · Shutoff & isolation

Pneumatic Diaphragm Cut-Off Valve

A pneumatic diaphragm cut-off valve for two-position switching in gas, liquid and steam service. Specify air supply, control requirements and accessories with the process conditions.

SIZE RANGEDN15 ~ DN200(customizable)
PRESSURE RATINGPN1.6 ~ PN6.4MPa(customizable)
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Confirm the selected configuration and operating limits with DQSV before ordering.

Pneumatic Diaphragm Cut-Off Valve specifications
Valve Typeshutoff valve(two-position switching)
Nominal DiameterDN15 ~ DN200(customizable)
Nominal PressurePN1.6 ~ PN6.4MPa(customizable)
Body MaterialWCB / CF8 / CF8M / CF3M etc.
Medium Temperature-40°C ~ 450°C(depending on material)
Applicable Mediumgas, liquid, steam, corrosive media etc.
Connectionflanged
Air Supply Pressure0.4 ~ 0.7MPa
Control Modeon/off type(two-position shutoff)
Optional Accessoriespositioner / limit switch / solenoid valve / filter pressure regulator etc.

Body and actuator

Pneumatic Diaphragm Cut-Off Valve — Pneumatic diaphragm actuator · Spring and diaphragm operation with air-to-open or air-to-close action and selectable fail position.
Pneumatic diaphragm actuator · Spring and diaphragm operation with air-to-open or air-to-close action and selectable fail position.
Pneumatic Diaphragm Cut-Off Valve — Straight-through shutoff body · Metal or soft seats provide tight shutoff for interlock protection.
Straight-through shutoff body · Metal or soft seats provide tight shutoff for interlock protection.

Actuator and accessories

Pneumatic Diaphragm Cut-Off Valve — Pneumatic diaphragm actuator (air supply 0.4–0.7 MPa)
Pneumatic diaphragm actuator (air supply 0.4–0.7 MPa)
Pneumatic Diaphragm Cut-Off Valve — Optional positioner, solenoid valve and limit switch
Optional positioner, solenoid valve and limit switch

Product features

  • Rapid shutoff

    Stable sealing for frequent cycling or continuous regulation.

  • Reliable operation

    Critical areas can receive treatments for wear, corrosion and high temperature service.

  • Interlock integration

    Selection calculations and custom configurations are available for the specified operating conditions.

  • Reliable sealing

    Compact construction supports site installation and subsequent maintenance.

  • Fast response

    Stable sealing for frequent cycling or continuous regulation.

  • Accessible maintenance

    Critical areas can receive treatments for wear, corrosion and high temperature service.

Construction features

Rapid shutoff
Modular body, bonnet and sealing assemblies support maintenance and spare part replacement.
Reliable operation
Wetted parts can be selected for the medium, including stainless steel, alloy steel, fluoropolymer or rubber linings, and hard alloys.
Interlock integration
Actuation configurations include manual, electric, pneumatic, diaphragm and self-operated options, subject to the selected valve configuration.
Reliable sealing
Modular body, bonnet and sealing assemblies support maintenance and spare part replacement.
Fast response
Wetted parts can be selected for the medium, including stainless steel, alloy steel, fluoropolymer or rubber linings, and hard alloys.
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