full welded forged steel ball valve PN 2.5 Mpa

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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:Fast fast question about aquarium check valves?
Adequate the purpose you let a tank cycle in the first place is due to the fact of Bactria needs to grow that will maintain your water clear. As for overstocked. I consider your proper on the threshold of being over stocked. Just preserve the tank walking a lil longer and spot if it clears up. But when your 15 gallon tank has the filter from the ten gallon tank that could be why to you dont have sufficient water moving around to scrub it
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Cb400 Hawk
Q:how many valves does a human heart have?
The four valves in the heart are: * The two atrioventricular (AV) valves, which are between the atria and the ventricles, are the mitral valve and the tricuspid valve. * The two semilunar (SL) valves, which are in the arteries leaving the heart, are the aortic valve and the pulmonary valve. Possible Complications:- * Arrhythmias (abnormal heart rhythms), including atrial fibrillation and lethal arrhythmias * Clots to other areas * Endocarditis (infection of the heart valve) * Heart failure * Pulmonary emboli (blood clots in the lungs) * Stroke
Q:what are valves in 2/4 stroke engines?
I can tell you right now crazydrunk couldn't have provided the right answer. If he knew what he was talking about, He'd know if the car is advertising the number of valves, and its 16 valves, thats 4 Cylinders, with 4 valves in each cylinder. Two for intake and two for exhaust. The intakes are usually the bigger ones. Simply divide the number of valves by 4 and you'll get the number of cylinders. 24 valve is 6 cylinder and 32 valves is 8. 2 stroke engines are commonly found in old motorcycles, lawn mowers, leaf blowers, genorators and small gas engines like that. 4 stroke engines are found in anything that runs on gas and is over 1000lbs, usually and diesel is above that but runs on heat ignition, rather than spark ignition.
Q:will installing an egr valve?
Possibly. If you don't go out then you need to have someone hook up a code reader and clear the SES light.
Q:Isuzu Rodeo OBDII code P0440: EVAP purge valve solenoid?
I have seen many of the Rodeo's purge valves malfunction causing rough idle and that clicking coming from the valve. It is not normal behavior for that purge valve. Double check all hoses for any hair line cracks, they tend to crack on the bottom side alot. Otherwise replace the purge valve it make a huge differnce in the vehicles idle and performance. Also a intake cleaning service helps quite a bit too, most lube centers and shops can do it for about 50-60$. That cleans all the carbon out of your intake plenum, port runners, valves. It may help the valve to stop malfunctioning also, have seen that service clear all codes and bring back lost power and rough idles clear up.
Q:my valve cap is leaking slowing how do i fix it on my 95 jeep cherokee?
The cap on the valve is just a dust cap designed to keep dirt out of the valve. To determine if the valve is leaking, move the car until the valve is at the bottom pointing up. Put a little water into the valve and watch for bubbles. Bubbles confirm the valve is leaking. You could try replacing the core with a little valve wrench (you will lose all the air in the process) or go to a service center and have them replace the valve. You cannot replace the valve yourself. If no bubbles, you have a leak in the tire or where the tire joins the wheel. Any tire service center can find and fix the leak.
Q:What is a flow valve?
google repairing flow valve on ice maker it is there.
Q:valve and burner pipe connection on gas grill?
The connection between the valves and the burner are always a loose fit on an average gas grill. The regulator controls the pressure of the propane between the tank and the valves. The valves control the flow of gas. The propane leaving the valve is forced through a tiny orifice as it exits. This tiny orifice serves two purposes. It increases the pressure and velocity of the escaping gas, which helps speed it in the right direction. This, in turn, sets up the venturi effect. The venturi effect is a fancy way of saying that the system, from the valves to the burner, is designed to pull in air. There are usually little rectangular shaped vents in the burner tubes located where the burner tube connects with the valve. These vents allow air to be drawn into the system in order to ensure that the propane has enough oxygen to obtain complete combustion. Too much air is better than not enough. The second purpose of the orifice in the valve is that it doesn't allow the flame to travel back down the line toward the tank. The orifice is to small to allow enough oxygen to be sucked in to the closed part of the system to support combustion. Very good safety feature. Plus, the propane exiting the valve, even on high, is so minimal that a roaring fire from just the flow from the valves is improbable, maybe impossible. Gas grills are safe. People are dangerous. The main thing is to make sure you see a flame somewhere within the first 2 to 3 seconds after turning the valves to on. If you don't see any flame after 2 to 3 seconds, turn the valves to off, give the grill a chance to air out. You can even fan it with a newspaper or something. You just want to ensure that you are never trying to light propane that has had a chance to build up and mix with oxygen. After airing the grill out, either figure out what the problem is or try lighting it again. They aren't that complicated. Go ahead and get that grill fired up. The kids are hungry. Hope this helped.
Q:Any way to fix a leaky CPVC valve?
Turn off the main water to your house. Turn that valve to open. Then tighen the nut on it (slightly), see if the valve will close , if yes; then tighten it a little more, then see if the valve will close. If yes - that should do it. If the nut is so tight that the valve will not close, then loosen the nut just a tad. That should do it, ......... now, turn the valve off. Turn back on the main water to your house -- and see if that works.

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