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Home/Products/Ball Valves/Certification and inspection documents

Ball Valves

Certification and inspection documents

Ball Valve with Position Indicator supports pipeline isolation and flow routing. Selection focuses on the sealing arrangement, fluid conditions, piping interfaces and operating requirements.

Nominal size
DN15-DN100
Pressure rating
PN16
Service temperature
-20 °C~120 °C~250 °C
Model
QT41F-16C/P/R

Configuration and suitability depend on the specific model documentation.

Product overview

Certification and inspection documents

Service conditions

A ball valve opens or closes the pipeline by rotating a ported ball. Port geometry, seats and stem sealing determine its operating behavior. Selection should consider differential pressure, fluid cleanliness and cycling duty together.

A pointer or scale assists position identification; the relation between position and flow still depends on internal geometry and system differential pressure. Check indicator-to-shaft correspondence, control duty and repeatability requirements.

Construction and description

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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