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DQSV Rubber-Lined Butterfly Valve
DQSV · Corrosion resistance

Rubber-Lined Butterfly Valve

A lined butterfly valve for water, wastewater and compatible chemical or slurry applications. Check the lining material against medium composition, concentration and temperature.

SIZE RANGEDN50 ~ DN2000
PRESSURE RATINGPN6 ~ PN16 / Class150
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Confirm the selected configuration and operating limits with DQSV before ordering.

Rubber-Lined Butterfly Valve specifications
Size RangeDN50 ~ DN2000
Pressure RatingPN6 ~ PN16 / Class150
Temperature Range-20°C ~ 120°C
Body MaterialWCB / CF8 / CF8M / QT450 / high-nickel cast iron etc.
Lining MaterialEPDM / NBR / FKM / PTFE / NR etc.
Connectionwafer type / flanged / lug type
Applicable Mediumwater, wastewater, acid and alkali solutions, seawater, saltwater, pulp, ore slurry, gas etc.
Actuationmanual(handle / worm gear)/ pneumatic / electric

Body and construction

Rubber-Lined Butterfly Valve — Fully rubber-lined body · Rubber-covered internal surfaces and disc provide tight bidirectional sealing and wear and corrosion resistance.
Fully rubber-lined body · Rubber-covered internal surfaces and disc provide tight bidirectional sealing and wear and corrosion resistance.
Rubber-Lined Butterfly Valve — Concentric disc · Centered geometry supports easy operation and low flow resistance in large-bore lines.
Concentric disc · Centered geometry supports easy operation and low flow resistance in large-bore lines.

Drive options

Rubber-Lined Butterfly Valve — Manual handle or worm gear drive
Manual handle or worm gear drive
Rubber-Lined Butterfly Valve — Pneumatic actuator (rapid cycling)
Pneumatic actuator (rapid cycling)
Rubber-Lined Butterfly Valve — Electric actuator (remote control)
Electric actuator (remote control)

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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