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: Hi. I am planning to install new kitchen faucet and noticed that there are two shut off valves under the sink. One of them is badly rusted and needs to be replaced. I noticed that it is connected to three pipes (one of which is kitchen faucet). The other is clearly water coming in. What is the third one connected to wall? Also how should I go about replacing this? Anything that I should be careful of?
- it looks like a 1/2 inch galvanized pipe out of the wall, and the valve is screwed on to it. kinda hard to see the back side of the valve and pipe. it could be a 1/2 inch copper pipe and the valve could be a compression type. anyway, you will have to cut the water off unless this is the hot line in and if so you can cut the water off at the water heater. its probably a cold line in and obviously you cant take the valve off without cutting off the main supply line some where. take off the two small lines and don't move them around to much, they are compression fittings so just reattach them to the new valve. then unscrew the valve, you may have to hold the incoming pipe but just try the valve first. take the valve to a plumbing supply, Lowe's, or home depot and get one just like it. if one place doesn't have it go to another and find the same valve. if it screws on get a small tube of pipe dope to coat the threads. if you anticipate problems get a 1/2 inch galvanized cap [if that is the pipe you have coming out of the wall] so you can plug the pipe and cut the water back on temporally. this is general info so you will have to deal with your special situation. good luck.
- Q: Im living in an a house previously own but abandonded , and im trying to get water, the thing is the pipe where the shut off valve is is dettached , and i dont know where to reattach it nor do i see the missing pipes to reassemble what does the main shut off valve attach to in my house?
- You have the main water line outside that feeds everyone. Look for a man hole cover and remove it. You should see the turn off valve there. There may be a pipe unit that the county removed so the water could not be turned back on. Call the country and ask for the water to be turned back on. If you are talking about the line after it goes onto your property then it's just a large pipe that comes into your home somewhere. They normally put a on/off valve at that point that allows you to shut the water off inside the home. If the pipe inside the house is detached from that valve then someone most likely cut it and took out a section. You would have to turn the water out at the manhole so you can open that valve and drain the water out of it. Then using a torch/solder/pipe sleeves, new pipe etc solder the replacement piece in place. Remember water in a pipe will not allow the pipe to reach soldering temp without creating steam, which can burn you. Hope that helps....
- Q: if i put a power valve on my honda xlr 125 would it make my bike have faster acceleration
- The powerband is caused by tuning an engine, they are most noticeable on a small lightweight 2-stroke. When you are riding and you change up too early you will have noticed the bike slows down and does not accelerate very well, but if you keep the rpms within a certain range it will accelerate smoothly – that is the effect of a powerband, it can be moved up or down the rev range by altering the ports and by changing the harmonics of the expansion chamber (the trumpet shape of the exhaust system). Either your garage is having a laugh at you or they are hopeless – I suspect the former. EDIT: You make it faster by tuning it –?making it less reliable and these bikes are already peaky. If you make them more peaky you will need to run them at higher revs –?higher revs = more power from available torque, therefore you do not want to move the powerband down the range or broaden it. Changing the sprockets will not improve acceleration AND top speed it is one or the other.
- Q: I think I have a bad valve steam seals because when I start the car white-grayish smoke comes out of the back of the car. When let sit for 2 or more hours start car and smoke comes out everytime. Will a valve adjusment fix the problem? Thanks
- I agree with MC. If you have a leaking valve seal, it'll just be a matter of time before the other ones start leaking, if it's a high mileage engine. You might as well pull the head(s) and have all seals replaced. The kit you but has all the seals in it, not just one. You can check the valves also while the heads are off.
- Q: I was getting something to burn and smoke up this empty 2 liter bottle for my friend's brother's science experiment. We didn't find any wood, so I took his trumpet valve oil, dripped some on a piece of wood that wouldn't burn and make it smoke up. Does burning valve oil have any negative side effects as opposed to say, regular oil? I shouldn't have been so lazy and just used vegetable oil or something haha....
- Valve oil is basically just mineral oil and various other ingredients. You can buy pure oil, and it's also the main ingredient in baby oil and other medicines. Nothing wrong with burning it.
- Q: How do I know if the valve seals need replacing? From what type of smoke can I detect?
- A leak down test won't tell you anything about the valve stem seal. It will about the actual valve face sealing in the valve seat, but the valve is closed when performing a leak down test. The best way to diagnose worn valve stem seals is if you get a lot of oil smoke onstart up, but it goes away in a few minutes. A real giveaway on bikes is after the bike has set on the side stand overnight and when you fire it up, you get more oil smoke out of the left side muffler than on the right side muffler. That's because the oil in the valve area runs to the left side when parked on the side stand.
- Q: I had to replace the gaskets on my valve cover only to discover that the valve cover had developed a hole due to oxidation. I waited a week for a new valve cover to come in and left the engine exposed. Should I have any issues? I mean its covered but its still outside. Should I pour some oil on the exposed part of the engine?Its been already about a week.
- A clean dry towel over the exposed valve train assembly will keep the dust out. A closed hood will not stop dust from flying through the fender-wells, under the car and into the engine compartment. I have news for you: An electrochemical reaction is called corrosion. Your valve covers don't fall within that category. Valve covers are usually of stamped steel from gosh know where. I've seen and heard of oil pans rusting through on Ford cars and trucks but your issue is a first. I have a pair of 48 year old 300 hp. 327 stamped steel valve covers in the cellar with not a spec of rust on them. Along with that two pair of chrome 427 Chevrolet valve covers that are 45 years old with no rust. America has gone to hell in a hand basket when they started buying outsourced boiler plate steel.
- Q: My mum (73, non-smoker, not overweight) has been diagnosed with 2nd degree aortic valve stenosis 5 years ago. Now deteriorating. Her cardiologist sees her every 6 months and strongly recommends surgery. She is too scared as dad died during a coronary bypass op. Any tips how to gently make her feel better about the op? She heard on the radio that some valve replacements can be done via catheter, not necessitating open heart surgery and heart-lung-bypass. Is that true for aortic valves and is it likely to become mainstream soon? She lives in Germany, so I guess good centres would be Munich, Wuerzburg and Heidelberg. Any views very appreciated!
- Without surgery, a person with aortic stenosis who has angina or signs of heart failure may do poorly. Possible Complications * Arrhythmias * Endocarditis * Left-sided heart failure * Left ventricular hypertrophy (enlargement) caused by the extra work of pushing blood through the narrowed valve Aortic stenosis can be cured with surgery. After surgery there is a risk for irregular heart rhythms, which can cause sudden death, and blood clots, which can cause a stroke. There is also a risk that the new valve will stop working and need to be replaced. According to a prospective, single-center, nonrandomized study of 25 patients, percutaneous implantation of an aortic valve prosthesis in high risk patients with aortic stenosis results in marked hemodynamic and clinical improvement when successfully completed. Medium- and long-term results are unknown. When selecting the optimal therapy for individual patients, the percutaneous approach must be carefully weighed against the excellent results achieved with conventional surgery. Please note that I am not a medical professional.
- Q: My doctor detectd a heart mumer. I am 48 years old. Had a echocardiogram performed. He says that I have a sightly irregular valve and I do not need to take precautions. I run three miles a day. I have heard that this condition makes your heart more suceptiable to infection. You should take antibiotics when dental work is done. My GP is a man of few words. Just says continue as usual and nothing needs to be done unless there is further symptomns. My question: Should I follow up with a heart specialist or would it be over doing it? Should I go on antibiotics when I get dental work? Can this Slightely irregular valve get worse?
- I have the same thing. Don't stress too much about it, it may even correct itself in time. If you had an echocardiogram which I did also, if there was a bigger problem he would have told you. It's not in a doctors best interest to sugarcoat a problem you have. It could open up the chance for malpractice lawsuits. Relax and stay healthy, good for you for still exercising! Hopefully you match that with a healthy diet.
- Q: i have been told that a bad EGR valve (exhaust gas recirculation valve) could cause a car to buck or hesitate in mid range speed at low rpms, thats what my car is doing. i work at autozone and i used our code reader and there was a code that stated EGR flow malfunction anyone else have this problem ever? please help me! i dont wanna spend the $120 if i dont need to!
- Since you work at auto-zone why don't you get yourself a Haynes repair manual. I would say the egr is probably bad but the book will show you how to test the egr to make sure it's bad. It also has a lot of good trouble shooting information.
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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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