Design features
double-offset disc motion that reduces seat contact during most of the stroke
Final dimensions, materials, ratings and documentation depend on the approved configuration.
Butterfly valves / LIANGGU
Double Offset Performance Butterfly Valve
This model is a butterfly valve distinguished by double-offset disc motion that reduces seat contact during most of the stroke. For a project quotation, share the required size, pressure designation, materials, seating, connections and quantity. Final suitability is confirmed against the approved specification.
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Explore product details ↓ PRODUCT DETAILS
Understand this valve.
Working principle
a shaft rotates the disc through a quarter turn; seat geometry, differential pressure, flow direction, line velocity, cycle frequency, and actuator torque determine shutoff and control performance; verify cycle frequency and shaft bearing load
Typical applications
process water, hydrocarbons, utilities, ship systems, and frequent-cycle isolation
Selection priorities
flange compatibility, cycle frequency, shaft bearing load, actuator torque, seat material, and pressure direction
SPECIFICATION REVIEW
Define the required configuration.
Manufacturer-listed options remain subject to the selected design and service. They are not fixed specifications for every configuration.
| Size / DN or NPS | Project-specific — include in your RFQ |
|---|---|
| Pressure designation | Project-specific — include in your RFQ |
| Common material options | Manufacturer optionCarbon steel, low-temperature steel, stainless steel, alloy steel, or another approved alloy after service and fabrication review |
| End connection & standard | Manufacturer optionFlanged or butt-welded ends matched to the approved piping class and selected product design |
| Actuation & accessories | Manufacturer optionManual, geared, electric, pneumatic, or hydraulic operation only where the selected design and duty support it |
| Design standards | Manufacturer optionAPI 609 may apply to double-flanged, lug, or wafer butterfly configurations; testing, pressure design, interfaces, and actuator requirements must be specified separately |
| Lead time & documentation | Confirmed in the written quotation |
Other materials & project configurations
Listed materials are common options, not an exhaustive range. Share the required grade and service conditions so we can review suitability, manufacturing feasibility and availability.
Catalogue information supports the enquiry. Approved technical documents define the final supply.
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