full welded forged steel ball valve PN 16 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.
（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 have a valve seat pop out and it did some damage my question is can it be fixed i took it to a machine shop the guy look at me with a little confusion he said it cant be done anyone out there have another answer
- It depends on the amount of damage. Before they relocated the oil cooler it blocked airflow to one cylinder and the exhaust valve ran hot. The valve guide wore, the valve started hitting the seat off center and the valve head would break off to bounce around inside the cylinder, often putting a hole in the top of the piston and dropping debris into the case. The cheapest solution was to find a used motor to put in. If there's no damage to the piston, you might be able to repair the head but that valve bouncing around usually does a fair amount of damage.
- Q: The pump is working fine on the presta valve on my back tire, but it is not working on the other presta valve. It seems like the the presta valve isn't sticking out far enough out of the tube for the pump to be able to lock in on it. What could be causing this?
- to apply the adapter, you need to first unscrew the presta valve, then placed the adapter on and pump up the tire, then take the adapter off and tighten the presta valve to close it. I consider the different answer that that's recommended to replace the tubes so as that the presta valve does not come aside. New tubes are inexpensive - approximately $6 or so. you need to purchase a spare, too, merely in case you flat. in case you do no longer understand the thank you to alter the tubes, your community motorbike save can do this for you and clarify the technique so as which you're able to do it your self interior the destiny and sell you the tire levers (and patch kit in case you want) you will ought to do it. reliable success!
- Q: my pcv valve tube is broken in half I replaced it with a rubber hose does it have to be whole
- The PCV valve is part of the engines emission control system. It controls the evacuation of the crankcase by applying engine vacuum to the crankcase and introducing the vapors drawn off into the engine. If the PCV valve and especially it's hose cracks or breaks, the engine will have a bad vacuum leak. The engine will loose a great deal of power. Many transmissions have a vacuum modulator that adjusts the shift points based upon engine vacuum levels. Normally low vacuum is associated with WOT (Wide Open Throttle) and so the tranny will delay upshifts when WOT is detected. Astrobuf
- Q: I would like to know about the signal pneumatic valves are drivesn (PWM,PCM?) and about their bandwidth and bit rate. Where can i find info?Thanx!!
- Go to the FESTO website. they should have all the answers for you in the downloadable litriture.
- Q: how do i adjust the valve lash my book sys to torque to 136 in lbs but my wrench is only in ft lbs
- valve lash is a small gap between roker arm and valve bridge or valve top its main reson if any meatel heat then expend. it proper gap according to manual book intake valve gap less according to exhaust valve and fuel intake and exhaust out depend on valve gap you aslo called valve lash use for fuel setting.how time fuel in and how time exhaust out.
- Q: Is a Head gasket the same thing as the valve cover gasket, on my honda civic si?
- Depending on the material..If it is cork..you should change it every time..if it is neopreme..it can be reused...but what I don't understand is why do them seperatly..you have to take the valve cover off to replace the head gasket.
- Q: What is the purpose of the LNG Vs Propane Valve that has to be installed on Gas Stoves/Ovens before use ? How can I set it myself for Propane ? What negligible effects would I experience if I hook a stove up to Propane while the valve is set-up for LNG ?Thank You !
- The difference is the size of the orifice. I've never changed it myself but I don't think it could be too difficult, however I've always had a professional do it for me. The reason for this is that propane and natural gas (methane) have very different Btu contents. Propane has a much higher Btu content and the orifice for propane is smaller. There is also a small difference in pressures of the supplied gas as pointed out below, but it is small. If you hook up propane while having the natural gas orfice installed, you may experience problems with incomplete combustion (soot) and the appliance getting hotter than design due to too many Btu's. LNG (Liquid Natural Gas) is a cryogenic form of methane. It is generally stored at -250 deg F. It is not used for domestic fuel.
- Q: I started out playing trombone in middle school, then switched to euphonium as my main instrument. (I still play trombone for marching and jazz band, but I'm a little better at euphonium.) That being said, should I get rotary valve trombone or the one with axial flow? I only have a student trombone right now... And I have a professional Besson euphonium.
- First, you should know that a valve trombone is different from what you're talking about. Valve trombones have three or four valves, much like a baritone or euphonium. What you're thinking of is called a symphonic tenor trombone, tenor-bass trombone (less common), or a tenor trombone with an f-attachment. The difference between the axial flow and traditional rotary valve on the trombone is one of feel. The axial valve is designed to provide less of a change in resistance between playing the horn with and and without the valve pressed down. Some people prefer that resistance. Either way, the quality of the entire horn is going to be a better indicator than the valve section by itself. Your best bet is to go to a local music store and ask to try out all the professional models - pick which one feels and sounds the best to your style of playing.
- Q: Water is seeping up around relief valve threads. Tried tightening but could not get it any tighter.
- lift few times pressure relief release, just to check if it is not jammed and it is not holding too high pressure. 1. prepare thread tape or goo, if no experience - goo is better, available in hardware and plumbing stores, you need just few drops 2. cut off water supply to the heater 3. relieve pressure in the heater (just open any hot water tap (fawcet) and let water out) 4. remove the valve completely, 5. with wire brush clean the thread, check for damage to the thread on the cistern as well and clean it too 6. wind several layers of teflon tape or well grease with plumbers hot water goo 7. remount the valve 8. close hot water tap which was used to release the pressure 9. open water supply to the heater 10. open hot water faucet to let the air out, close when stop gurgling and water pour out 11. check for leaks, if no leaks - JOB WELL DONE! 12 if any leaks find, repeat 1 to 4, wind few more layers of teflon tape, if goo was used - you need to use tape as well then. 12. repeat 7 to 11 and that is all...
- Q: im looking for the egr valve on a 97 mazda 626 its not in top of engine like other cars where can it be?????o and its a 4 cylinder
- okay your gonna look at your intake manifold. Then locate where your air intake connects to the throttle body. Look around the throttle body and you should see the egr valve it will be hidden by your air intake but if you look hard enough you'll find it and also if you see in vacuum lines running around there, they will point you in the right direction because your egr valve has two vacuum lines that run to it. hopefully that helps.
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full welded forged steel ball valve PN 16 Mpa
- 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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