Full Welded Forged Steel Ball Valve DN 44 inch
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- 100 pc/month
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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.
（Ⅰ）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.
（Ⅱ）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.
（Ⅲ）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 GB、GB/T JB、JB/T JIS customize |
Test Standard | API 6D customize |
Face to Face | API 6D customize |
Pressure-teperature rating | ASME B 16.34-2004 customize |
Marking | 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 9001、ISO 14001、API 6A、API 6D、TS CE、API607/6FA/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.
- Q:hi im 13 years old and i am having my tricuspid valve repaired or replaced the doctors do know what they are going to do yet.what is the success rate of the operation ?and whats the survival rate of the operation ?all other info would be appreciatedthanksalex
- Any type of valve surgery involves exposing the aorta of the heart, therefore it is a form of open heart surgery. Over time, this has become a relatively basic procedure for heart doctors and it has a success rate of almost 80-95%. There is a chance that you might need another surgery afterwards, but that only happens in about 5-10% of patients that get the surgery. The survival rate for this operation is very high and only 5-10% of patients experience any negative effects during the surgery. This includes infection, stroke, allergic reaction, or bleeding. I will keep you in my prayers Alex. Best of luck to you!
- Q:If my understanding is correct, in a standard combustion engine as you press the gas pedal the speed of everything increases: the cam shafts spin faster (and thus the valves move faster), the pistons move faster...EVERYTHING goes faster. That sounds like an optimal system in theory, so what is the benefit of having the valves be able to be intelligently out of phase (for lack of a better phrase) with the rest of the system?
- Valve timing is a compromise. You can optimize valve timing for a certain RPM, but it will be wrong for every other rpm. Advancing a cam helps bottom end, and retarding a cam helps top end. Actually changing duration and lift is more difficult, but can be done, and IS being done. The benefit is to widen the torque curve, helping both power and economy
- Q:my valves got dirty long story how do you clean them
- Remove the valves, wash them and the horn in warm (NOT hot) water with liquid dish soap. Dry with a clean towel, then oil and reassemble.
- Q:I need a ball valve that when you shut it off it sends a signal to a light that indicates that it is off.
- Shouldn't be a problem. all that's needed is a valve with elect contacts on valve stem. should be able to get one with two sets of contacts for on and off...
- Q:Last year an echo revealed severe aortic valve regurgitation with low ef of 37 but ecg was normal. i am 36 yrs old. I have noticed that i often have chest pain when i lie on my left (especially after a heavy drinking or if my bp is high) but the pain subsides when i lie on my right or back. Is it possible that my aortic valve only leaks when i lie on my left side, if so, can I continue living a normal life without needing valve replacement surgery if avoid lieing on my left side. or i'm i fooling myself, is the heart damage progressing silently?
- Hello, You don't tell us *why* your doctors think, you developed this problem with your aortic valve in the first place? Has there been any infection of the valve with germs, (bacterial endocarditis)? Did you have Rheumatic Fever as a child? Were you born, with stenosis or regurgitation of your aortic valve? Do you have abnormally early, clogging-up of your artery-linings with cholesterol?
- Q:After shutting off the hot and cold water lines to my washer to remove the unit from my laundry room i noticed a small leak coming from the hot water valve as if the valve is not completely closing. The valves themselves should be roughly 10 years old and were extremely tight when attempting to close them, my question is how big of a job is this to replace the water valve? Is it as simple as turning off the main water to the house and replacing the valve or are these typically soldered on? Currently i just ran the hose for the hot water to the drain line to prevent water from leaking onto the floor so is this something that is a fairly non issue once i hook the lines back up to the washer and turn them back on? Or is this something i should get addressed asap?
- Of course, the best solution is to replace the valve. Valves are either soldered on or attached to the pipe with compression fittings. If the pipe is copper and you see a silver band of metal between the pipe and the valve, that's probably solder. In this case, it would be best to let a plumber replace the valve. Otherwise, if your valve is attached with a compression fitting, you can get a new valve at your local home improvement store in the plumbing section. I recommend getting a 1/4 turn, steel ball valve. These are very simple and reliable valves. When you remove the old valve, be sure to also remove the compression washer and shoulder nut as well. You'll want to use the new ones that come with your valve. I also recommend using Teflon tape to wrap the threads of your new valve, at least two times in the direction of nut tightening. This will reduce the chance of leakage through the threads. Tighten the compression washer between the valve and the shoulder nut snugly. Make sure the valve is off. Turn the water on and check for leaks. If you see periodic drips, tighten the shoulder nut until the dripping stops. The other cheap and dirty alternative is to get a cap for your existing valve. These are also available in the plumbing section of your home improvement store. They run about $2-3, I believe, and are threaded onto the faucet where your hose attaches. That will keep your leaking valve from dripping all over the place.
- Q:i have an old 79 malibu and its only got a 267 in it. I wouldnt buy new valve covers because its not worth it to me but i was thinking i could clean the ones i got up a little bit. i was thinking of painting them. What kind of paint should i use? and one other thing is the gaskets. I figure while i have them pulled off i should put new gaskets on. I read up about getting all the old stuff off but i was curious still about it. I was just looking at some average ones made of cork for 10 bucks. Do i lay the sealer downthen put the gasket on , then put the valve cover on?
- the best thing i could tell you is clean them good and when you put the gasket on dosent matter if its cork or not, but the silicon ones are better, is that to make sure that the mounting surface's are clean. and have no oil on them otherwise your gonna have a leak. as for the pain clean em good and it really dont matter which paint
- Q:okay so i recently brought a trumpet and the valve keys were getting stuck. i used the valve oil and it worked. but then when i put the valve key back in and tried blowing through no sound came out. i think it's because i didnt put it back in right. now my question is how do i put it in right? i tried everything but it's still not making a sound. thanks,
- The first thing you should check is the order of the valves. take them all out and look on the sides of them for a number. One should have a 1 on it, another will have a 3 and the other one will probably be unmarked but that's obviously the one in the middle. On the outside of your trumpet there will be a 1 and a 3. The valve with the 1 on it goes in the slot that has a 1 on the outside, etc. Make sure you put these in right. if it's still not playing after you put the valves in and they're secured, twist the tops of the valves where the pearls are clockwise until they don't turn anymore. This should fix your problem.
- Q:hi i want to now what a BOV (blow off valve) i no what it does but i dont no the instalation process what pipes and stuff are invalved and were does it go next to the turbo of air intake
- Most are designed to install on the intake/turbo piping. They're for the release of pressure surges to keep the turbo safe. Most stock bovs are not capable of raised boost which is why many buy aftermarket ones.
- Q:and i want to but over size valve seatscan i do it in a 1991 chevy chenynne k2500
- just age mostly and any Machine shop is where to take it an d talk with them
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Full Welded Forged Steel Ball Valve DN 44 inch
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 10 pc
- Supply Capability:
- 100 pc/month
OKorder Service Pledge
OKorder Financial Service
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