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Floating Stainless Steel Ball Valve

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  • Last update:

    2019-06-25 01:51

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Company Profile
Hunan Primatherm Valve Co.,Ltd








Shuige Industrial Zone, Liandu District, Lishui City, Zhejiang Province, China


http://www.primathermvalve.com/ http://pazefamen.chinashenhe.com/

Product details

It’s very easy to be contacted for the Primatherm floating stainless steel ball valve with the things made of metal or iron during the productive process.In order to make the floating stainless steel ball valve alway keep rustless,the easiest way should be as per followings:

The first:All the finished forgings should be cleaned after pickling.If any sand hole,it should be welded by the argon arc welding,then solution treatment after being polished.

The second:Afterthe hydralic test being done for the finished product,it should be cleaned by the water with anti-rust powder.

The third:It should be packed with wooden case during transporting,do not contact the metal things.

The fourth:It shoud be maintained on a regular basis after being assembled in the pipe,for example:Often use the lubricating oil under the stem and open&close appropriately the valves several times,making the ball、stem、sealing face not easy to be assimilative.

There’re Full Bore and Reduced bore for the floating stainless steel ball valve.However which structure,both the flow resistance coefficient of ball valve are very low.

Especially the called “Full bore”type,because the channel diameter is equal to the inner diameter,the loss of internal diameter local resistance is only the frictional resistance of pipes of the same length,that is,in all of valves,it’s the lowest for the flow resistance of this kind of ball valve.In the rocket launch and test systems,it’s requested to be as low as possible for the resistance of conveying pipe

There’re two ways to reduce the resistance of the pipeline system:one is to lower the fluid velocity,it will need to increase the the pipe diameter and valve bore,which will cause a unfavorable effect for the economic of pipeline system.Especially for the low temperature conveying system(liquid hydrogen,it’s quite unfavorable.

(1) To reduce the local resistance of valves,the ball valve will be the best choice.

(2) It’s open and close fast、convenient for the ball valve.

As the ball valve could be full open or closed just only need to turn 90°with lever, it’s very easy to realize quick open and close.It could be realized by quick open and close,the time for some structures can be just 0.05~0.1s,to make sure it could be used in the automatic system.When making quick open and close,there’s no impact for the operation.

(3) Good sealing performance for the ball valves.

The most seats of ball valve are made of PTFE,vice sealing made of the metal and non-metallic material,it’s usually called soft seat.Generally speaking,it’s easy to guarantee the sealing performance of soft seat and not so high requirement for the machining precision and surface roughness of sealing surface.

(4) Long using life for the ball valve.

Due to the good self-lubrication of PTFE,it’s a small abrasion for the friction with ball.Also,due to the improvement of the technology of ball machining,it lowers the roughness to extend the using life of ball valve.

Part Name

ASTM Material





A351 CF8

A351 CF8M

A351 CF3M


A351 CF8

A351 CF8M

A351 CF3M


A182 F304

A182 F316

A182 F316L


A276 304

A276 316

A276 316L

Seat Ring


Body Gasket




Bonnet Stud

A193 B8

A193 B8

A193 B8

Bonnet Nut

A194 8

A194 8

A194 8



Gland Flange

A182 F304

A182 F316

A182 F316L

Gland Bolt

A193 B8

A193 B8

A193 B8

Stop Plate

Carbon Steel+ZN

Carbon Steel+ZN

Carbon Steel+ZN


Carbon Steel


Plywood Case Seaworthy Package



Operation Available

Lever,Gear,Pneumatic,Motorized etc


Fire-safe Design,Blow-out Proof Stem,Anti-Static,Nace MR01-75

Design Standard

API 6D,API 608,ASME B16.34

Fire Safety


Test Standard

API 598,API 6D

Bore Type

Full Bore,Reduced Bore

1. Body material could be optional
2. Ball material could be optional

1. Q:How about your usual delivery time?

A: The cargos are usually delivered within 30-45 days depends on the sizes&qtys,but we never sacrifice the quality just in order to catch the delivery time.

2. Q:What’s your guarantee time?

A: We guarantee our products with 18 months after shipment or 12 months after installed on pipeline.

3. Q:How about packing?

A: All we used are the standard seaworthy package,plywood case to protect our valves well.