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Home/Products/Butterfly Valves/Certification and inspection documents

Butterfly Valves

Certification and inspection documents

Butterfly Valve with Position Signal supports pipeline isolation and flow control where the configuration suits the duty. Selection focuses on the sealing arrangement, fluid conditions, piping interfaces and operating requirements.

Nominal size
DN50-DN500
Pressure rating
0.6MPa-1.6MPa
Service temperature
≤80 °C; 0 °C ~80 °C
Shell test pressure
1.5 MPa (nominal pressure 1.0 MPa) 2.4 MPa (nominal pressure 1.6 MPa)

Configuration and suitability depend on the specific model documentation.

Product overview

Certification and inspection documents

Service conditions

A butterfly valve changes the available flow area as its disc rotates about the stem. Its compact rotary arrangement is widely used for pipeline isolation. Flow-control duty also requires assessment of disc position, differential pressure, flow response and actuator control capability.

Construction and description

Position signals communicate operating status to monitoring systems. Define switching position, contacts or output, power and wiring. Review indication or alarm functions separately from actual isolation capability.

Match the operator to the valve load and site operating method. Manual operation needs accessible clearance. Frequent cycling or remote control also calls for assessment of output capability, duty and position feedback.

Define fluid composition and continuous and start-stop operating conditions, then assess body, internals and seals as a combination. Particles, deposits and cleaning affect sealing surfaces and mechanisms; plan maintenance for the actual service.

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