Full Welded Forged Steel Ball Valve DN 18 inch

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10 pc
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100 pc/month

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Product Description:

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 

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 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:PCV valve = oil burning?
Maybe. What wt oil do you use?5w30 or 10w40? 10w40 in a 160,000 engine might also be what ya need. If ya live in an area that stays fairly hot ya might even try 20w 50 or straight 30 wt
Q:removing supply valve?
Stop! I'm assuming you've got threaded pipe and not soldered joints here, You need a wrench on the pipe as well. Allowing that pipe to turn can loosen the connection in the wall an cause a leak if you haven't already done so.
Q:What are the advantages of having larger valves over two smaller ones?
Larger valves will allow more volume in and out of the motor. While this does produce less HP in some cases, it in creases torque on the bottom end.
Q:blowout valve for sti plz help!?
A blowoff valve releases turbo pressure when shifting or when you're off the throttle. A BOV is basicly a vacuum tube connected to the intake manifold and two bolts(sometimes there will be a pipe to route the released intake pressure to prevent the engine from stalling), and shouldn't be too hard to change out in under 20 minutes or so, because it will void your warranty.
Q:what happen when solenoid valve is activated?
If the pressure in any one zone is different than the other zones it could be one of two reasons; either the pressure is high (usually due to one or more sprinkler heads not poping up), or its low (usually due to a leak in the pipes). Something that could cause low pressure in all the zones are an obstruction in the water line above the valves (unlikely), or a hole in the line above the valve (the water would be filling the valve box and causing damage to the lawn wherever it is located), or leaks in all the lines (again would be easy to identify from the excess water in the ground at the source of the leak). Lastly the valve itself could potentially be faulty. The solenoid inside the valve holds the valve open when electricity is applied across it. If the wires to it are damaged; if the solenoid is bad; or if the valve has any rust or dirt inside that could cause a lower than normal amount of water flow.
Q:what is the proper type valve for a main shut off inside a house?
A ball valve for water use. Gate valves fail after a period of time and also leak.
Q:bent valve stem?
Valve stems don't usually bend unless the valve hits a piston. I am assuming the rod that was bent was a push rod. The 5.2 engine is not an interference engine, so a cam timing problem would not cause the piston to hit the valve. I suppose that if you way over reved the engine a lifter could have pumped up and at a very high RPM the valves may have floated causing one or more to strike a piston. Push rods do bend for a variety of reasons, but to have a bent push rod AND a bent valve stem I would need more information to give you even an educated guess. You have the head off so look at the top of the piston and see if it looks like it was hit by the valves. Take the head to a machinist and have him check it for cracks and damaged guides. Have him check the valve spring tension also.
Q:How can I tell if my 2004 Ford Taurus a 12 or 24 valve?
the conventional suspect is a belt, maximum often a skill guidance belt, yet in some circumstances an A/C belt. purchase a can of belt dressing and spray it on the interior the belts jointly as the engine is idling, (pay attention for the fan!) you may hear the squealing quit immediately once you detect the perpetrator. next discover the reason at the back of the squeal, many times a belt this is in simple terms too unfastened. regulate the P/S or A/C unit to tighten the belt. it is going to pass some million/2 whilst depressed heavily between the two pulleys.
Q:wheres the egr valve?
You egr valve will be located on the exhaust or have a metal tube running from the exhaust the other side of it will be mounted on or near the intake. you can also look at the vacuum routing label on the hood if it is vaccum controlled it will be listed on the diagram
Q:how i fix my trumpet's third valve?
clean the valve and the tube the valve fits in. You will need to take the bottom cap off and with valve oil on a soft cloth (t shirt) wipe out the inside completely wipe down the valve with the cloth also. Clean the spring that pushes the valve back up. Use a tiny bit of vaseline and a liberal amount of valve oil on the valve. Replace everything. If this doesn't do it, take it to the repair shop.

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