Full Welded Forged Steel Ball Valve DN 32 inch

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Design Features of full welded forged steel ball valve

The body of ball valve is full welded,selects high quality forged material,and adopts the advanced forged forming technology to form two semi-spheres which are welded into a whole in the middle of the body.This welding technology differentiates the ball valve form others,and makes the valve more spherically,so the valve structure is more compacter,lighter and stronger.Besides,the middle direct welding realize highly accurate valve body manufacturing,makes fully and completely sealing between the seat and ball.The full welding instead of bolts completely avoids the outside leakage,so ball valve is the ideal product for under-ground,offshore working platform and under-sea equipments.

Adopting fixed plates or trunnion to support the ball

The top and bottom of the ball is supported by upper and lower fixed plates or stem and trunnion,and the ball is accurately placed in the center of the ball valve to achieve complete seals and precise movements.When plate adopted,the force exerted by the medium to the ball is distributed via the plate to the left and right bodies,so that the stem does not bear the blending moment from the medium,but only the torque from the ball rotation during the opening/closing of the valve.The low-friction PTFE Teflon composite bearings installed between the ball axis and fixed plate and between the stem and the trunnion can absorb ball moving action caused by the pressure of the medium.This structure brings stable actions and easy operations for the ball valves,and the required operation torque can be reduced,so smaller actuators can be used,and the cost is cut down.

ball valve seat is floating structure,means the seat can move along the medium direction,so that the seat can fit against the ball all the time.
Double piston effect structure seat of full welded forged steel ball valve
Seat design is special double pistons effect structure,it can ensure the seal wherever the medium flows into the ball valve.

Seat multistage seal strucute of full welded forged steel ball valve
As following graphic instruction,on seat bearing ring,set two soft sealing rings(A and B)and metal sealing spherical surface which can seal with the ball.Seat ring A is spring loaded,which seals the surface with the ball tightly to the surface to form an initial seat;When there is pressure generated from medium,the piston force is generated to make seal ring A elastically deformed and seal ring B fit the surface of the ball surface due to the piston effect caused by area difference,thus the second seal forms.When the medium pressure is rising.It will generate huge pressure to seal ring A and seal ring B,so the two seals have a greater elastic deformation,then metal seal ball surface compact with ball surface to form the third level of metal to metal seal.

Secondary seat seal device of full welded forged steel ball valve
As the above graphic instruction,the secondary seal device(seat grease injection valve)can be chosen according to the actual working condition,medium requirement,seal requirement,etc.Seat ring grease injection valve is a one-way valve,installed on the body,which can prevent the leakage and inject grease under the outside force.When secondary seal is required,there is a grease injecting channel and hole on the seat ring.The grease can form a seal between the seat and the ball,and then stop the leakage.

Standards Applied of full welded forged steel ball valve

Design   Standard

 API   6D customize 

Connection   Standard

 ASME   B 16.25-2007  ASME B 16.5  ASME B 31.4  ASME B   31.8  DIN  GBGB/T  JBJB/T JIS customize   

Test   Standard

 API   6D customize 

Face   to Face

 API   6D customize 

Pressure-teperature   rating

 ASME   B 16.34-2004 customize 


 MSS   SP-25 customize 

FAQ of full welded forged steel ball valve:

Q1:I can’t find the type of steel check valve which I need. what can I do?

The chart above only lists out some common composition of steel check valve parts.We may provide other different parts material composition according to the customer's request or the actual valve working condition.


Q2:Which certification do your products pass?

  Our products are in accordance with ISO 9001ISO 14001API 6AAPI 6DTS CEAPI607/6FA/BS6755.


Q3:How can I place an order?

  The only one thing you should do is to tell us the sepecification about type quantity and  mode of transportation, then we will send you quotation within 24 hours.

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Q:electronic valves from the '60s uses?
It sounds like 1960's 70's 80's radio and tv valves. pcl 85, pl504, py800, ef80, pcl82, maybe. I through away about 100 of them about 10 years ago. I wish i would have kept them. They are of interest to vintage radio and tv collectors. Could try selling a few at a time number should be on the glass. Still used in high quality audio amps and output stage of guitar amps for warm quality sound. Good luck.
Q:i can't pump my presta valve...?
You have to re seat the pump nozzle and try again. Sometimes you have to push down on the valve to unseat the stem, it gets stuck fast and wont let air in.
Q:natural gas furnace valve not opening?
I don't know if this will help without seeing your furnace but this is similar to what happened when I light ours in the fall.Where the pilot light is if you have one there is a wire sensor and that gets dirty sometimes and needs cleaned at the tip by the pilot,on ours it connects to the gas valve and signals it to open.Good luck to you hope this helps,it also could be a bad valve.
Q:control valve selection?
There are numerous articles online that address this question from choosing the correct size to the correct actuator. Here are just a few:
Q:I can't fix my 3rd valve slide! Help?
Be sure that it is aligned correctly when you place it back in the valve casing. When you are putting it back in, it has to turn until you hear a click, indicating that the valve guide has fallen in the right space. This aligns the valve with all the ports. (The valve guide is a small plastic piece located under the valve spring. This valve guide must snap into a little notch inside the casing. When it does, the valve will be perfectly aligned. You will know when the valve guide is in the right place because you will feel and hear a click and the valve will not rotate any longer.) After thorough cleaning, oiling, and correct valve placement, if you still notice it sticking, take it to a repair shop to have it chemically cleaned. They are typically very good and will ensure your trumpet is in proper playing condition.
Q:Heart Valves?
A good friend of mine ignored his bad cold symptoms and was diagnosed with pneumonia when it already affected his heart valves.
Q:what do the valves of an engine do?
the valves of the cylinder head let fuel in and exhaust gasses out as well as closes off the combustion chamber of the cylinder head allowing the engine to build compression for the firing of the cylinder. improperly adjusted valves can cause a list of problems. one if to tight of clearence is set the valves will not seat all the way and compression will be low as well as to much fuel and so forth. other issue is that it is hard on the camshaft lobes. too loose of a clearence the valve will not open up far enough to allow the appropriate amount of fuel in causing a run issue as well as not enough exhaust gas being pushed out.
Q:Riding with a Schrader/Presta valve adapter?
I own a 1998 Bandit 1200S. These bikes have inherently noisy valves. As has already been said, loose is much better than tight. You can run with loose valves for a while without any major damage resulting (unless the screw comes out of the rocker and lodges in an oil passage...very rare) If you don't hear a clicking then the valves are tight and major damage can occur. The Bandit does not have shim under/over bucket. The valves can be adjusted with a $10 tool from Suzuki (or one can be made for a couple of bucks). I adjusted my own, as a novice mechanic, and it isn't that difficult however you should synch the carbs after the service which requires a $30 - $100 set of gauges. Don't forget the feeler gauges either. Along with the Suzi tool, Guages and new gaskets from Suzuki you should have a shop manual or haines manual that will describe the process as well as appropriate tools like a torque wrench. This can also be time consuming for a beginner with many pit falls along the way and you have to measure with the engine cold, that means at least 24 hours since the last start up. The long and the short...You can ride it for a while and (most likely) will not have a problem.
Q:Mitral valve repair surgery?
From what i've got study having it repaired rather than replaced has a much greater helpful restoration consequence. The survival fee is in the mid ninety's % clever so curiously like an rather secure surgical operation. Hoping she has a rapid restoration.
Q:What's the different between (P.S.V. & Relief Valve)?
psv is a pressure sensitive valve the other is sspring loaded and will fail in time

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