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DQSV High-Temperature Metal Hard-Seal Butterfly Valve
DQSV · High temperature & pressure

High-Temperature Metal Hard-Seal Butterfly Valve

A metal-seated butterfly valve for high temperature service. Select body and sealing materials against the combined pressure and temperature requirements of the application.

SIZE RANGEDN50 ~ DN2000
PRESSURE RATINGPN16 ~ PN40 / Class 150 ~ Class 300
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Confirm the selected configuration and operating limits with DQSV before ordering.

High-Temperature Metal Hard-Seal Butterfly Valve specifications
Nominal DiameterDN50 ~ DN2000
Nominal PressurePN16 ~ PN40 / Class 150 ~ Class 300
Working Temperature-196°C ~ 650°C(depending on material)
Body MaterialWCB / CF8 / CF8M / CF3 / CF3M / WC6 / LCB / Monel / Inconel etc.
Sealing Materialalloy steel(stainless steel + Stellite alloy)/ nickel alloy etc.
Leakage ClassANSI Class VI(zero leakage)
Connectionflanged / wafer type / lug type
Applicable Mediumwater, steam, oil products, gas, corrosive media etc.

Body and construction

High-Temperature Metal Hard-Seal Butterfly Valve — Triple offset metal seating · Metal-to-metal sealing for heat, wear and erosion resistance.
Triple offset metal seating · Metal-to-metal sealing for heat, wear and erosion resistance.
High-Temperature Metal Hard-Seal Butterfly Valve — Laminated or Stellite sealing assembly · Stellite hardfacing for corrosion resistance and the specified -196–650°C range; confirm the selected configuration.
Laminated or Stellite sealing assembly · Stellite hardfacing for corrosion resistance and the specified -196–650°C range; confirm the selected configuration.

Optional actuators

High-Temperature Metal Hard-Seal Butterfly Valve — Manual or worm gear actuation
Manual or worm gear actuation
High-Temperature Metal Hard-Seal Butterfly Valve — Electric actuator (remote control)
Electric actuator (remote control)
High-Temperature Metal Hard-Seal Butterfly Valve — Pneumatic actuator (rapid cycling)
Pneumatic actuator (rapid cycling)

Product features

  • Compact construction

    Stable sealing for frequent cycling or continuous regulation.

  • Low-effort operation

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

  • Large-bore service

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

  • Reliable sealing

    Compact construction supports site installation and subsequent maintenance.

  • Convenient installation

    Stable sealing for frequent cycling or continuous regulation.

  • Accessible maintenance

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

Construction features

Compact construction
Modular body, bonnet and sealing assemblies support maintenance and spare part replacement.
Low-effort operation
Wetted parts can be selected for the medium, including stainless steel, alloy steel, fluoropolymer or rubber linings, and hard alloys.
Large-bore service
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.
Convenient installation
Wetted parts can be selected for the medium, including stainless steel, alloy steel, fluoropolymer or rubber linings, and hard alloys.
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