Full Welded Forged Steel Ball Valve DN 40 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: I saw some other answers. I figure the relief valve needs replacing, ok no problem, but exactly how much pressure are we talking about here? what is the correct procedure to shut this thing down to replace the valve?
- Same thing happened to me, but with an oil boiler. Shut off power to water heater. Find the drain valve on bottom of unit, attach hose if it has a fitting. If you have an open sump pump in you basement, just drain into there, or you can fill buckets and keep emptying them. Use a pipe wrench to take of pressure relief valve. Take the valve to a good hardware store, or plumbing supply place so they can match it. Put teflon tape on threads of new valve (thats all i used, no leaks) and install then refill tank, you may have to manually hold down the water feed line. turn on power, and open all faucets to bleed out the air.
- Q: Since the valve drain is usually open, I am wondering if placing the cap on the drain has made my water heater dangerous.
- You said it is the plastic drain valve. The pressure relief valve definitely is not made of plastic. A cap on the plastic drain valve at the bottom of the tank is not dangerous. If the bronze relief valve near or on the top of the tank has a drain pipe on it and that is the one you capped then, yes, you need to remove the cap and replace the valve as soon as possible.
- Q: Hi, I have Orbit valve for a section of my yard. The pressure is really low when I turn it on with my remote. When I turn it on manually at the valve, the water pressure is much higher.
- Its possible the valve stem is corroded with stuff not letting it actuate properly open. Turn water off and unscrew the valve then actuate it electrically while watching for a full stroke. Make sure flow control is all the way open when inspecting valves stroke. Remember where you had it set when done or readjust. Also check the solenoid for corrosion and clean linkages. I would clean and coat with petroleum jelly. My guess is valve seat is gummed up so lube the stem and work it manually till it slides open and closed easy then test with the solenoid. Good luck!
- Q: Or is our money stinky? is the $59 we paid not equivalent to that paid by xbox360 ps3? Please help!! I am sick of getting killed every 5 minutes. Is VAC false advertising?
- Well first off Activision fired infinity ward so chances are slim to none (they hired Bungie, guys who created halo).. valve doesnt have a thing to do with the game and generally Activision are lazy asses so id count the chances around 1 in 100
- Q: What are the benefits of changing new cylinder heads and exhaust valves in the Main engine of the vessel? I am now studying a vessel which has a problem with their main engine. Frequent repair of cylinder heads (they usually weld it) and exhaust valves are the ones they do. I need to further give the benefits to be submitted to the vessel's management for them to buy new cylinder heads and exhaust valves as a replacement for the welded ones.
- The only reason to change out a cylinder head is because the exhaust valves have been burnt or the valves in general have been used to a point they don't seat any longer. Which means the engine compression to fire the cylinders on compression stokes is too low to be efficient to operate. Or the cylinder head has a crack in it and leaks water or the compressed gasses from the engine compression blow into the water jacket through the cracks causing the coolant to blow out and the engine to overheat.
- Q: Friends,is there anyone know about LinX(Linear Exchage)Valve,how they work.thanks in advance
- A valve is a device that regulates the flow of substances (either gases, fluidized solids, slurries, or liquids) by opening, closing, or partially obstructing various passageways. Valves are technically pipe fittings, but usually are discussed separately. Valves are used in a variety of applications including industrial, military, commercial, residential, transportation. Plumbing valves are the most obvious in everyday life, but many more are used. Many valves are controlled manually with a handle attached to the valve stem. If the handle is turned a quarter of a full turn (90°) between operating positions, the valve is called a quarter-turn valve. Butterfly valves, ball valves, and plug valves are often quarter-turn valves. Valves can also be controlled by devices called actuators attached to the stem. They can be electromechanical actuators such as an electric motor or solenoid, pneumatic actuators which are controlled by air pressure, or hydraulic actuators which are controlled by the pressure of a liquid such as oil or water. Actuators can be used for the purposes of automatic control such as in washing machine cycles, remote control such as the use of a centralized control room, or because manual control is too difficult; for example, the valve is huge. Pneumatic actuators and hydraulic actuators need pressurized air or liquid lines to supply the actuator: an inlet line and an outlet line. Pilot valves are valves which are used to control other valves. Pilot valves in the actuator lines control the supply of air or liquid going to the actuators. The fill valve in a commode water tank is a liquid level-actuated valve. When a high water level is reached, a mechanism shuts the valve which fills the tank. In some valve designs, the pressure of the flow fluid itself or pressure difference of the flow fluid between the ports automatically controls flow through the valve. In an open valve, fluid flows in a direction from higher pressure to lower pressure.
- Q: Ok. I have to ask cause I have been in hospital all weekend after having a moment on saturday when my heart decided to start racing. Woke up 4.30am on saturday morning cause of blood test which kinda showed I could have had a heart attack which was scarey and though I was discharged today I got told I had a leaking aortic valve. What does this mean and what is going to happen. I am honestly really worried cause it cant be good
- The valves of your heart valve are not closing properly. Very common thing. May or may not require surgery. May or may not be related to you having a fast heart beat. Ask your dr to tell you what the racing heart was about. They would have a record if it was significant. Or your doctor may want you to wear a monitor for 1-2 days to help to catch this so it can be identified.
- Q: how do you adjust the hyd. valves when motor is running?? thanks, jerry swain
- that's puzzling to discover 0 clearance even as the lifters are not any more pumped up. it truly is how I actually have continuously lashed small block chevys, even with the actual undeniable actuality that it may get messy. get rid of one million valve hide, start up engine. Tighten the first rocker nut till the push rod stops spinning lower than the rocker. Then decrease backpedal a million/4-a million/2 turn. Repeat for each and each of the others. This works nicely with new valve practice factors to boot to boot used parts. the downside is oil would drip on warm headers.
- Q: I have presta valves on my mountain bike now and only Presta valves can fit through the hole in the rim where the valve goes. If i want to start using Shrader valve tubes, because they are way more common and i can get them at Walmart, is it ok if i bore out the hole in my rim in order to get the Shrader valve to fit
- Yes you can. Many people have done so. Make sure you file the hole after drilling so you will not have any burrs. BTW most tubes come from China so if you want to put in walmart specials or from a reputable bike shop it will do the job. If you want to put presta valves again, then you can buy a grommet that reduces the hole size. If you have an expensive bike and want to keep it original, then I advise not to drill
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Full Welded Forged Steel Ball Valve DN 40 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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