Full Welded Forged Steel Ball Valve DN 18 inch
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- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 10 pc
- Supply Capability:
- 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: The water won't drain around my outside shutoff valve. The faucet at the valve is not dripping any water. Could it be underground problem?
- i don,t understand your Question.
- Q: Im looking for a new BBb tuba. i would like six valves at 4+2. but if not looking for 6 valve BBb tuba
- I don't know how long you've been playing tuba but 6 valve BBb tubas are virtually non-existent. No current brass instrument manufacturer will have that in their line-up. Tubas with 6 valves are already rare and are pretty much limited to F tubas. If you want a 6 valve BBb (I don't know why you even need/want that many valves) then your best option would be to buy a 5 valve BBb tuba and having it modified to include a 6th valve. Either way, expect to pay a minimum of $10000 (ten thousand) for the instrument.
- Q: What is the functional difference between the following:1. Blow Off Valve2. Dump Valve3. Bypass Valve4. Diverter Valve
- My Dive save gave me the prospect to aim on the I3 interior the pool. Any sturdy dive save could. that's high priced kit which you will have for an prolonged time. It needs to in good condition authentic and paintings for you. besides, cooperative dive shops benefit a lot greater in a satisfied customer than they lose by applying letting you are trying on the BCD. I for you may t walk right into a dive save with out popping out with greater kit. LOL
- Q: 1990 Pontiac Sunbird 2.0L Fuel Injected has EGR Valve, I can suck and blow through the hose connected to it, an I supposed to be able to do this, or not...? It looks old, like it's been on the car forever...
- It recirculates the fumes and the air--but a cracked hose is a nightmare if vacuum leak develops--fix it--just get a new hose and happy motoring
- Q: The hot water in my bathroom is leaking from the faucet. I've shut off the valve below the sink, but it continues to dribble out. Also, there appears to be some rust build-up. Could that account for a failing valve?
- It sounds like your shutoff valve is not working properly. You need to shut off the hot water at the main valve where it comes out of the water heater (this will shut off all hot water in the house); drain the line (there's a little knob on the main shutoff valve you can twist that will allow the water in the pipe to drip out), then replace the shutoff valve. The shutoff valve is probably threaded pipe and can be loosened using two wrenches (hold the pipe with one wrench and twist the nut with the other - you want to conteract the twisting motion on the pipe so the pipe does not weaken and burst, which is why the one wrench needs to hold the pipe). once the valve is removed, clean the pipe threads with a wire brush and cleaning solvent to remove the rust and install the new valve. Be sure to read the manufacturer's directions to see if you need to wrap the threads with teflon tape first. When the valve is replaced, you can turn on the main hot water valve at the water heater; then use the new shutoff valve when you prepare to repair or replace the faucet. I would expect the faucet is leaking due to worn out washers, you can take it apart and tell. I susupect the rust you see is a result of the leak and not the other way around.
- Q: The valve on my radiator has numbers on it to determine the amount of air/steam leaving the heating system. what number should i put it on and how would i determine it
- I would think the easiest way would be to put a thermometer on the radiator (with the bulb in the air flow), turn the heat on to one setting and record the temperatures each half hour for about 4 hours. Then, turn the adjustment to a higher (or lower) number and repeat that. That way, you'd know which way to turn to set it. Of course, the level at which you'd be comfortable would be found by trying different settings. Assuming the adustment is a valve, valves in the USA will open by turning counter-clockwise. Closing is, of course, clockwise. Hope that helps. EDIT: I received your email - I don't mind at all! OK, so you have only one valve for all the radiators. Without knowing anything else, I'd say you just removed the part called the bonnet (the upper half of a valve). It shouldn't matter which number it's set on if it's reinstalled correctly. When a valve is removed, the best way to put back is to open it slightly (turn counterclockwise to a low number), then reinstall the bonnet. Once it's back in, it should work like normal. If that doesn't work, perhaps you can get a plumber or a local handyman to check it. As to the upper ones being airlocked, it really sounds like there is a blockage in the supply line. I am assuming this is steam-heat radiator that is supplied by a boiler-type heating unit?
- Q: 1990 Pontiac Sunbird, I took a piece of hose going to the egr valve to try and see if it is working properly, but with car off, I can suck through, and blow out into hose going to egr valve, and it doesn't seem like there's any seal stopping air flow either way...is it supposed to, or what is this supposed to do?
- a good egr valve should be tested when idle. when idle, remove the hose on the egr valve and replace it with a hand-held vaccum pump. by applying pressure, the engine should idle rough or die. if so, the egr is working properly. if it doesn't respond or it doesn't hold any pressure, the egr is bad. if it holds pressure but there is no sign of rough idle, egr is clogged. (my husband is an automotive technician/smog technician)
- Q: this valve used in the refinery.
- This is a 'Trip and Throttle' (T T) valve that is maintained in a 'Fully Open' postion during normal turbine operation. It is maintained open by a Hydraulic Control system that, should any of many shutdown conditions occur, the hydraulic oil will be dumped to its reservoir by the operation of a Solenoid valve, actuated by the shutdown signal, and the T T valve will immediately close, stopping the steam flow to the turbine speed control steam chest in a safe manner. The valve handwheel is then operated to ensure that the valve remains fully closed until the system is ready for re-start. The valve cannot be opened again until the shutdown condition has been rectified and the hydraulic system reset to restore the oil pressure to the valve. The valve however, can then only be re-opened manually and slowly until the turbine is brought to the 'Minimum Speed Control' Governor setting. When settled down at this condition and the steam chest valves are under the control of the Governor, the T T valve is swung wide open. This latches the valve in the fully open position until another shut down occurs,
- Q: I jsut got my valve cover replaced on my car what does that do?
- It just covers up ur valves. Keeps them from getting damaged by other moving parts. And you could say that it keeps most of the oil in it so that the valves can be lubricated. Valves are moving parts so yes they do need oil to help reduce heat and wear!
- Q: My baritone is somewhat new, the first valve isn't going down, I've tried nearly everything and I want to avoid taking school instrument to a music store to repair.
- I have played for over 30 years and have a few to many horns. But I love to play. Sounds like its time for a bath. Take your horn to the bath tub. Fill the tub with warm water and a little DAWN dish soap. Lisen to me and buy DAWN, not something else. Palmolive tasts nasty, and the others do not cut the grease on the horn. Gently take out the valves and all slides. Lay them on an old towel. Lay the horn in the tub on an old towel so you dont scratch the tub. Let it soak. While the body soaks. Wash the valves. The valve might unscrew off the top stem. This would be great because you do not want to get the felt or corks wet. Be very gentle and careful, use an old white sock to scrub the old oil off the valve. Now that the valves are washed, rinse the valves with clean water. Now, take the old white sock that you just used and twist it. Then you can feed this into the valve case on your horn. Pull it through each of the three valves a few times. If you are realy good to your horn, you may even buy a snake made for cleaning trombones and baritones and run it through every pipe on the horn. Now rinse and dry everything. There should be no oil or grease left on the horn or the slides. If you find any go back and wash it off. First grease up the slides with slide grease or lanolin. Then oil (not grease) the valves with a good quality valve oil such as Blue Juice, Holton or Al Cass. Use just a few drops of oil on each valve. You place 2 (Two) drops on at a time and gently slide the valve into the horn. Spin and with any luck it will play like a dream. Now, you need to stop eating before you play. And never oil the valves through the hole in the bottom, that is where all the dirt is going. If you must, oil through the leadpipe. I remove the valves after I play and oil them. They are always ready to play this way.
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Full Welded Forged Steel Ball Valve DN 18 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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