Full Welded Forged Steel Ball Valve DN 44 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:Hoe do you install a sprinkler valve?
Most valves are either 3/4 or 1 with female connections. Use the same size male adaptors with teflon tape wraped around the threads and screw it into the valves. Take a photo before you start to refer to when rewiring.
Q:how to adjust the valves on a 20 horse power griggs and stratton rideing mower?
On that model number the valve clearances or as follows. Inlet valve...0.010... Exhaust valve..0.013. Set cold. Set hot... Inlet 0.002 and exhaust 0.003. Set piston on the rock.. That is: Piston at TDC (Top Dead Center) on the compression stroke. Undo the bolt or bolts a 1/4 and set the feeler gauges between the tappet and adjust so the feeler is a stiff pull. Tighten the lock-nut or nuts and repeat for the next valve. Good to go. mmalky: 50 years of diagnosing and fixing large and small mower engines.
Q:a valve-job question?
MOST modern engines have hydraulic lifters, which pretty much eliminates the need to have any periodic valve adjustments. You can take stock heads to a shop and put two grand into them and make better flow and bigger valves and more power, or actually buy a set of performance heads for less and make more power. the only time your valves would need to be set is when putting together a new engine, or taking apart the one you have and replacing say a head gasket or something. (in which case you would have a shop go through the heads and make sure they are up to factory specs. If your engine is running fine, and you have kept the oil clean and the motor in good tune, follow the recommended maintenance intervals in your owners manual. a valve adjustment is not going to give you horsepower.
Q:I need a one way filler valve?
schrader okorder.com
Q:pulmonary valve stenosis in my eight month old daughter.?
I don't know if it's the same but my son had aortic stenosis when he was born. After many tests it just went away and no they did not have to do a catherization. Never caused him any problems either.
Q:Articifical Heart Valves -?
There are three of these things: the caged-ball which utilizes a metal cage to house a metal ball, tilting-disc valves, which have a single circular occluder controlled by a metal strut. They are made of a metal ring covered by a tissue, into which the suture threads are stitched, in order to keep the valve in place once implanted and there's bileaflet valves, which consist of two semicircular leaflets that rotate about struts attached to the valve housing which is the most recent type, eh? So heart valves are considered to be extremely durable. They're made of either pyrolytic carbon or titanium coated with pyrolytic carbon, and the sewing ring cuff is Teflon or polyester or dracon (probably dacron :P). They key to the materials chosen is durability because of the constant fluid flow. I see this as pure engineering, not medicine, specifically fluid mechanics: like if there are rare complications for example thrombus formation is a debilitating side effect of high shear stresses created by design of the valves. Ideal heart valve from an engineering view would produce minimal pressure drops of course have small regurgitation volumes because it's supposed to minimize turbulence and regulate the flow.
Q:Installing kitchen faucet/shut off valves?
can't get your picture to load. is it the hot? is there a dishwasher a wee bit away from sink? is there something water related on the other side of the wall?
Q:Does a valve have to be completely opened or closed?
If its open all the way it would be hotter so I dont think it would hurt nto keep it half way
Q:Valve cover oil leak?
The valve cover gasket is not as big of a deal, if it gets really bad you will just start smelling a lot of burining oil. The head gasket can become a major issue, especially since coolant also flows through more internal part of the gasket. The question you need to ask is if the leak is closer to the top (valve cover) or farther down the block?
Q:water inlet pressure relief valve?
It sounds like a cold water relief valve, also known as a thermal expansion valve. It leaks when your city pressure exceeds 100psi (factory setting) or the set pressure. Code requires pressure to be below 80 psi. A Watts 530C will do the trick. It is adjustable. It will cost you about $30.00 - $40.00 + labor to remove old install new. If it is a pressure reducing valve, a new one will cost about $125.00. It lowers your pressure when it exceeds max allowable per the plumbing code, 80 psi here in Florida. I use the Watts 1 25AUB-Z3 Pressure Reducing Valve for these applications and set it at 60 psi.

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