Trunnion Mounted Flanged Ball valves A105 CL150 12’’ with Metal to Metal Seat 

 Trunnion Mounted Ball Valve CL150 12’’

A105 Body metal to metal seat

Data Sheet

Three piece construction;

Side entry;

Thick forged steel body and bonnet.

We used A193 B7/A194 2H to connect the body and bonnet. Our bolts are all whole thread, which is with firm tensile strength. not like some defective bolts with non-thread in the middle as used by some small factories.

Primary sealing: Upstream. When the pressure differential is lower or there is no pressure differential, the floating seat will move axially along the valve under the spring action and push the seat towards the ball to keep tight sealing. When the pipeline pressure P increases, the force exerted on the area A2 of valve seat is higher than the force exerted on the area A1, A2-A1=B1. Therefore, the force on B1 will push the seat towards the ball and realize tight sealing of the upstream part.

Secondary sealing: Downstream. When the pressure differential is lower or there is no pressure differential, the floating seat will move axially along the valve under the spring action and push the seat towards the ball to keep tight sealing. When the valve cavity pressure P increases , the force exerted on the area A4 of valve seat is higher than the force exerted on the area A3, A4- A3=B1. Therefore, the force on B1 will push the seat towards the ball and realize tight sealing of the upstream part.

This ball valves 12″(DN300) is designed with sealant injection device on stem and seat. When the seat ring or stem O ring is damaged due to accident, the corresponding sealant can be injected by the sealant injection device to avoid medium leakage on seat ring and stem. If necessary, the auxiliary sealing system can be used for washing and lubricating the seat to maintain its cleanliness.

This ball valve is metal to metal designed. Both seat and ball is metal surfaced with Nickel specially for wearing. That is seat material is SS316+Ni55， and ball material is SS316+Ni60. Its design is for high temperature and naturally fire-proof， not like plastic seat that may be metal or damaged easily while fire happens.  More，we also often use other types of metal powder like stellite（STL） and Tungsten Carbide（TCC）as better choice for customers.

This trunnion pipeline ball valve adopts the trunnion ball structure, so as to achieve lower torque under operating pressure.

Trunnion mounted ball valve is a new generation of high performance ball valve. It is labor-saving operation：ball is supported by upper and lower stems to reduce friction and eliminate the formation of the ball and the sealing seat driven by the inlet pressure to prevent excessive torque due to huge sealing load.