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.
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 


 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:Does anyone know what those valves are/do in my picture?
I'm a licensed Plumber and this is what those are for....if you doubt me contact Delta and speak with their customer service reps... Those are Isolation valves that plumbers use to turn off the water to you shower to make repairs within the shower valve its self (O rings...mixing cartridge, etc).....otherwise the water would have to be shut off to the whole house when making a repair. That and if you look closely they are NOT part of the valve its self....the look like valves that are attached (Threaded) to the Hot Cold inlets on the valve. My first guess...that is a Delta, Monitor, Shower Valve. Maybe a Moen positemp...but I'm pretty sure its a Monitor Series Delta valve. They're are BOTH very similar.
Q:Timing Belt and Bent Valve?
if ur timing belt cuts off on the highway then one or more of your valves will be bent and its realy expensive to fix and if fixed engine wont be the same happend to my friends accord so the best thing you do is get a new engine and have instaled,, go to spanish mechanic they fix good for realy cheap
Q:roman tub valve ?
Remove the valve and take it to a plumbing supply store. Home Depot and the like may have what you're looking for; but you're more likely to find it at a plumber's supply. They are the only ones I've ever found who carry odd bits.
Q:Hot water running only in Shower with Single-knob valve?
Single Knob Shower Valve
Q:i have a 96 mitsubishi galant and when you press the accelerator it rattles in the valve cover?
You might not need new valves or valve guides. Mitsubishis, along with many other vehicles, use hydraulic lifters which give off a ticking sound. They're located between the rocker arm, or in the rocker arm, and the head of the valve. It's very common and will not harm the engine. However, if the sound you're hearing is more of a rattling, like putting some nuts and bolts in a glass jar, you may need to pull the valve cover off and inspect for yourself to make sure that the rocker arms do not have any play to them while they are pushing on the valves. If there is any play in the rocker side to side, you may need to replace those rockers. However, if there is any play up and down you may just need to replace the lifter. To better check if you need new valves or valve guides run through this checklist: Are you burning oil? Have you done a compression test (both wet and dry)? And if so, were the compression numbers within spec? Have you felt a loss in power/idle quality/gas mileage? Is your oil level correct/using the correct oil/non-FRAM oil filter? At your next oil change, instead of using the recommended 5W-30 engine oil, try switching to something a little heavier, such as 10W-30, to cancel out the effect of possible lifter tick. Do not use a FRAM oil filter if you have in the past since they're filters tend to have additives that are unnecessary and may cause the engine harm.
Q:89 Dodge Ramcharger Valve Cover?
The covers will fit from mid sixties all the way thru 91. They are 5 bolt covers and are all over the place. 273, 318, 340, 360 cid.
Q:ATV head (valve seats)?
Get a valve job - cut the valve seats and lap the valves.
Q:Blocking off your egr valve???
i own a repair shop,and it wont give you much more horse power if any,all it does is stop the egr valve from working ,the kit allows you to remove the valve and put a block off plate on it,some say it helps a little i haven't noticed much of a difference in the vehicles that have them on,they just don't recirculate the exhaust gases like they should,which causes any car to fail an emissions test,that's about it,good luck,i hope this help,s.
Q:Mitral Valve Prolapse?
My 8 yr. old son was thought to have this at birth, thankfully he out grew it It can cause your heart to beat rapidly, especially during physical activity. There are different types also, but mainly a valve in your heart is not formed correctly causing it not to seal witch creates the back flow of blood. Look up MVP on the web and you can find tons of info. on it! Also, make sure to have a sonogram and speak to a great cardiologist!
Q:Why do some baritones have 3 valves and others have 4?
The forth valve on the baritone is the same as the trigger on a trombone - it lowers the pitch 2 1/2 tones to extend the range downward, to assist in improving intonation, and to solve so tricky fingering problems. You can learn baritone quite easy, if you relate what you know on the trombone to it. Here is a quick lesson on valve playing. Trombone position Baritone valves 1 Open 2 2 3 1 4 1 2 5 2 3 6 1 3 7 1, 2 3 Trigger 4 On high F#, you must play 2 3 On High G, you must play 1 2 Good Luck! It is a great and wonderful instrument to learn, and will help you trombone playing, too!

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