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Floating Ball Valve

Floating Ball Valve

Size range : 1/2"-10"
Class: 150LB-600LB
Temperature : ≤150 ℃
Materials : WCB,CF8/CF8M,CF3/CF3M

Technical specification
●Design Standard: API 608,API 6D,BS5351
●Face To Face: ANSI B16.10
●Flange ends: ANSI B16.5
●Test & Inspection: API 598

Features of floating ball valves:

1. Reliable Seat Seal

The structure design of elastic sealing ring has been adopted for floating ball valves. This seat design features a 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 and ball becomes bigger as the sealing ring transforms elastically to undertake the bigger force pushed by the medium without any damage.

2. Fire Safe Design 

With the valve heated in a fire application, the non-metal material parts such as seat sealing ring of PTFE, stem back seat gasket, gland packing, and the sealing gasket between body and bonnet might disintegrate or be damaged due to high temperature. CHAODA’s specially designed structure of auxiliary metal to metal seal is provided to effectively prevent both internal and external leakage of the valve. As required by customers, CHAODA’s floating ball valves with fire safe design can meet the requirement of API 607, API 6FA, BS 6755 and JB/T 6899.

3. 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 accidently 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 from underneath. 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. 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.The traditional packing flange design has been improved to be of two piece structure, i.e., being as a gland flange and gland, the latter contacts the gland flange with spherical surface. Thus, the gland remains vertical always, and is lined internally with a PTFE bush to prevent the galling against and friction between the stem, which can also reduce the operation torque of the valve.Based on customers’ requirement, a packing tightening design may be employed to obtain more reliable stem packing seal, which is loaded by bevelling spring.

4. Anti-static Feature

The traditional packing flange design has been improved to be of two piece structure, i.e., being as a packing flange plate and a follower, the latter contacts the flange plate with spherical surface. Thus, the follower remains vertical always, and is lined internally with a PTFE bush to prevent the galling against and friction between the stem, which can also reduce the operation torque of the valve.

If you have any enquiry about quotation or cooperation,please feel free to email us at info@weke-valves.com or use the following enquiry form. Our sales representative will contact you within 24 hours. Thank you for your interest in our products.