Full Welded Forged Steel Ball Valve DN 28 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:Is it ok to reuse valves?
hey why dont you go down to your local machine shop and ask a few questions,try and angle a cleanup job to trade for labor and experience.in other words,why dont you go ask your dadlove that commercial
Q:Idle valve for accord 2005?
Probably won't help. Idle Air Control valves are blamed probably ten times as often as they are at fault in Honda engines. It is mounted on the side of the throttle body and has a connector with wires instead of hoses. You don't mention why you are interested in the IAC valve, but if it is because of idle hunting (revving between about 500 rpm and 1500 rpm smoothly and rhythmically), a bubble in the coolant is by far the most common cause. If the coolant is changed and not bled the normal idle speed can't get hot coolant to the Fast Idle Thermo valve (FITV) so it figures the engine is cold and the valve opens to raise the idle. That raises the coolant to the FITV, which then decides the engine is warm so the valve closes, dropping the idle speed, over and over. Burping the coolant, by opening the bleed nipple on top of one of the radiator hose housings at the engine half a turn until a steady stream of coolant comes out, should stop that. Do it with the engine cold.
Q:Water pipe/ shut off valve hammering?
First check for a kinked or twisted supply connector hose. You may also have a piece of rubber gasket/washer debris stuck in the valve body (seat washer) or in the fill valve itself (from the connector compression washer). Shut off the water supply at the angle stop and disconnect the supply hose from the fill valve nipple under the toilet tank. Get a bucket and put the end of the supply connector hose/tube into the bucket and open the supply valve again. If it still hammers when unrestricted like this, the obstruction is in the anglestop valve body. The water pressure may force it out, but if it doesn't, you'll have to shut off your main water supply to clean the stop or replace it. If it doesn't hammer when unrestricted, the problem is now in the new fill valve, and is probably a deteriorated piece of the compression washer in your old supply connector hose or tube that has been pushed into the fill valve. Since it's a Fluidmaster, you can disassemble the head of the valve and remove any visible obstruction or just replace the top part.
Q:Can i smoke pot with and artificial valve?
I don't smoke anything. So pot was not an option for me. With that said I really do not have a problem with those that choose to do pot. I feel the same way about it as people that smoke. Please don't do it in my house, or in a confined area where I can't get away from it. I really do not want it around my kids. I think pot is safer then alcohol. I have known people that smoked pot. The majority of them did it to relax which meant they were hanging out at home. I feel that it should be legalized as that would kill a HUGE crime industry. Not much point in smuggling it over the borders or having secret deals with individuals when that person can run down to the local convenient store and pick it up. It could also be extra income for the governments as they could profit off it. I don't think it should be done while children are being watched. Like any substance, regardless of how mild it may be, it can impair your judgement. =)
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:Is Mitral Valve Prolapse worth worrying about?
Mitral valve prolapse is the most common cardiac problem and may affect five to twenty percent of the population. The condition is most common in women, although men are also affected. With MVP, symptoms do not begin before the early teenage years (approximately age 14 in girls and 15 in boys), but adults of any age may be affected. MVP tends to run in families, so those with blood relatives with MVP have a greater chance of also having the condition. If a person has mild MVP, he/she needs no restriction of exercise. But if the MVP is big, then it is a different thing. Because, though complications in this condition are very less, people who suffer from this condition have to take extreme care. In case of large MVP, you may have to cut down on your physical activity, have a surgery and may be put you on medications like beta blockers. If the valve is truly defective (not just 'prolapsed'), it is serious. Unfortunately, doctors have mistaken a 'differently shaped' mitral valve as a disease in itself. And this is where the non-disease comes in. In simple terms, a mitral valve that appears prolapsed is usually normal. It still is not clear to experts why some mitral valves appear prolapsed and allow some blood leakage backwards. I have an answer for that phenomenon, but the important point is that the disease is a non-disease.
Q:Noisy Xr250r motor, valves.?
I think you should check the other end of the engine too. Remove the sump and make sure the big ends have no play. Then you are good to go. Replacing the big end shells in good time is easy but if left too long then the engine is a right off. Possible also a transmission bearing is dying which you can spot at the same time.
Q:Trumpet Valves Question?
Depending on where you live in the world, humidity can cause your valves to seize. I was playing a gig in Washington, DC this summer with the US Army Band Pershing's Own and one of our horn players' rotors seized, and one of the trumpet player's valves seized too - being from Ottawa, Canada, the humidity in DC was a huge change! Also, if your top valve caps are too tight, it can cause the reaction of the valves to seem like they're locking. This happened to the 4th valve on my piccolo trumpet. Another issue to consider is the gap between your piston and the outer casing. The smaller the gap, you need an oil with less viscosity. The larger the gap, an oil with higher viscosity often works better. After owning a few different horns, I've learned which oils work better for each brand of trumpet. Just some food for thought!
Q:Ford Mechanical Selector Valve Operation?
Q:Honda civic VX.. how many valves?
it has 16 valves but less horse power than a regular Civic. This was designed to be a fuel economical model - a 'hybrid' equivilent in the early 90's

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