Full Welded Forged Steel Ball Valve DN 36 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:i need help identifying a broken valve in a van?
The valve can be bent or broken under the head. Just because it looks right up top only means the stems are OK. The stems are usually OK, even if the valves are bent and broken. If it's making horrible valve noises and you're not sure, it's probably got a bent valve. Only way to know without pulling the head is to do a compression test.
Q:Heart valve replacement surgery....?
Open heart surgery is always a risk, as is any major surgery. The main risks are from infection and blood clots. The risks taper off very quickly within a few days after the surgery. Heart valve replacements are a common operation, with a high success rate. Life expectancy is generally better with a valve replacement; but not all valve problems reduce life expectancy to begin with. Sometimes the trade-offs are more of an issue with quality of life, with higher quality achieved with a functioning heart valve, so some people may be taking a medical risk to obtain higher quality of life. No one can tell you for certain what the outcome of this operation will be. The odds are very high that everything will go perfectly and he will fell better than ever before. There is a very small chance that he will end up worse To put the risks in perspective, a person i know had minor surgery to her knee - a simple 1 hour operation done at an outpatient clinic. Ten days later, a clot broke loose and she died in her sleep. I have had the same operation twice and didn't even miss more than a few hours of work. Another person i know had severe heart problems and docs said it was terminal, but an operation could prolong his life maybe 5-7 years. He had the operation and its now been almost 20 years and his cardiologist says his heart is healthy and there's no reason why he might not live another 20 years or more.
Q:1995 Chevy V6 Blazer EGR valve?
I own a shop, and a 4.3 V-6 blazer (94) that did the very same thing as yours. I started running nothing but 93 octane Amoco, or BP gasoline, and the problem has went away. The funny thing is; the gas cost more, but since I run this gas I get much more gas mileage now, so it more than makes up for the difference. I also run STP fuel injector cleaner in it every 3rd tank of gas, and put it in at 3/4 of a tank. Don't use the STP in the white bottle as it is crap! Use the one in the black bottle. You will tell a difference right away. It is important to change the PVC valve every time you change the oil filter, as this will cause it too. My Blazer cranks out about 30 miles per. gallon, and about 20 around town, so it's easy to see the difference. Advance Auto Parts carries a new gasket for the EGR valve that has a screen in it, and that too will help the problem. It might even fix the problem, I'm not sure but it is supposed to stop the problem. Go to their website and look it up. It will be in the listing with the EGR valve. I think it's made by Tomco, but not positive. Glad to help out, good Luck!!!
Q:what are valves in 2/4 stroke engines?
The intake and exhaust valves in a four stroke engine are timed to allow air intake on the the intake stroke, both closed on the compression and power stroke and the exhaust valve open on the exhaust stroke. The valves on a two stroke engine are generally automatic reed type check valves that allow for an intake stroke and close for the compression and power stroke.
Q:2007 Nissan Quest Fuel shut off valve?
2007 does not have a shut off valve. Sounds as if some one has used a non programed key Nissan Imobilizer has detected the aftermarket non programed or key with chip embedded in the key has failed. After 4 attempts the car turns on lock mode and it is tow truck time. Gather up all the keys you have they all have to be reprogramed. And it is a good time to have two complete sets of keys and remotes money allowing of course. Only computerized lock smiths and Nissan dealerships can introduce keys. Is there a red light that looks like a car with a key lighting up when you attempt to start the car?
Q:weird trumpet valves?
I think the reason why your valves are sticking is because they are building up sludge from being oiled too much, and yes, that does happen frequently. Remove the valves carefully, wipe them off thoroughly with a clean cloth, replace them correctly, and lightly oil them. Then try pushing the valves a bit before playing.
Q:Will a valve adjustment fix the leak of a bad valve stem seals?
Don't okorder.com
Q:Sticking Intake Valve?
Don't know anything about configuration of this model by number, but I can recommend you hit up your library for a copy of How to Repair Briggs Stratton Engines, by Paul Dempsey. I have 2nd edition, but I think they are currently on fourth edition. First thing I would do is pull the head and inspect the valve seats. Lap the valves if necessary. If the valve seats are good to go, then you have to look at the lifting mechanism. Does it have rocker arm, or straight push lifters? Could the cam shaft have been damaged (i.e., have you hit any stumps with it)?
Q:is it possible to *** valves to a car?
Erm.........8 plus 2 is 10, not 16. And no, it isn't possible.
Q:Removing washer hoses from shut-off valves......?
for really bad ones you can cut diagonally across the snout of the hose connector with a hacksaw until you just break thru. slow and gentle is the key here. this method removes even the most stubborn hoses.

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