version:

Contact us

TEL:0086-577-67319888

FAX:0086-577-67311771

EMAIL:sales@ydcb-valve.com

http://www.ydcb-valve.com

QQ

Call me!

API Ball Serials

News center

 >> 

Home

Your position:

·

Standards:Ball valve
·Design and Manufacture: API 6D, ASME B16.34(BS5351),
   API 608,MSS-SP-72
·Face To Face Dimension: ASME B16.10, API 6D
·Flange Connection Dimension: ASME B16.5
·BW Connection Dimension: ASME B16.25
·Test And Inspection: API 598, API 6D
·Fire-safe Design: API 607/6FA
Application
Floating ball valves are suitable for use on various kindsof pipelines of Class 150 to Class 1500, PN16 to Pn100, and JIS 10K to JIS 20K to turn on or off the pipeline medium, of which the operation types include manual, worm gear and pneumatic orelectric actuators.
Reliable seat seal
The structure design of elastic sealing ring has been adopted for floating ball valves. This seat design featuresa bigger sealing pressure ratio between the ring surface and the ball when medium pressure gets lower, where the contacting area is smaller. Thus, the reliable seal is ensured. When the medium
pressure gets higher, the contacting area between seat ring andball becomes bigger as the  sealing ring transforms elasticallyto undertake the bigger force pushed by the medium withoutany damage.
 Fire  safe  design
With the valve heated in a fire application, the nonmetalmaterial parts such as seat sealing ring of PTFE, stem back seatgasket, gland packing, and the sealing gasket between bodyand bonnet might disintegrate or be damaged due to high temperature. YuanGao specially designed structure of auxiliary
metal to metal seal is provided to effectively prevent both internaland external leakage of the valve. As required by Customers, YuanGao floating ball valves with design can meet the requirement
Of API 607, API 6FA, BS 6755 and JB/T 6899.
 Reliable stem seal
 The blow-out proof design has been adopted for the stem to ensure that even if the pressure in the body cavity is risen acc-idently and the packing flange becomes invalid,the stem may not be blown out by medium. The stem features the design with a backseat, being assembled fromunderneath. The sealing force against the backseat gets higher as the medium pressure becomes higher. So the reliable seal of the stem can be assured under variable medium pressure. 
 Reliable stem seal
V type packing structure has been employed to effectively transform the pushing force of the gland flange and the medium
pressure into the sealing force against the stem.