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Ball Valves

Certification and inspection documents

Fully Welded Ball Valve with Filter Arrangement supports pipeline isolation and flow routing. Selection focuses on the sealing arrangement, fluid conditions, piping interfaces and operating requirements.

Nominal size
DN50-DN1000
Pressure rating
PN10-PN25
Service temperature
-20 °C~120 °C~250 °C
Model
GLQ61F,GLQ361F

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.

Selection of a ball valve with a filter arrangement combines isolation requirements with filter pressure loss and servicing. Define particle characteristics, filtration grade, dirt capacity and cleaning method, and consider the effect of blockage on flow and operation.

A fully welded body uses welded joints to form the pressure-containing shell with fewer detachable body joints. Review shell inspection, end-connection welding procedures and the maintenance approach after installation. Body construction and pipeline end connections are separate design decisions.

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.

Welded ends must suit pipe material, wall thickness and the construction procedure. Heat effects, protection of internal seals and post-weld cleanliness are important. Set welding parameters and inspection methods for the actual materials and joint.

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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