Butterfly Valve DN200 Wafer Type BS Standard

Butterfly Valve DN200 Wafer Type BS Standard

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1. Manual Wafer Butterfly Valve Description：
A butterfly valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk. Operation is similar to that of a ball valve, which allows for quick shut off. Butterfly valves are generally favored because they are lower in cost to other valve designs as well as being lighter in weight, meaning less support is required. The disc is positioned in the center of the pipe, passing through the disc is a rod connected to an actuator on the outside of the valve.

2.Main Features of the Manual Wafer Butterfly Valve
1.Square and short neck. Easy to stick scutcheon and cost saving.Nominal bore mm 20 25 32 40 50 65 80 100 125 150 200
2. The material of valve body: cast iron, cast steel, cast stainless steel and so on.
3. Pressure grade: 1.6Mpa, 4.0Mpa, 6.4Mpa
4. Connecting type: flange coupling
5. Temperature range: normal temperature -20---230ºC the thermal slug type -60---450ºC
6. Operation form: automatic open or close
7. Flow characteristic: equal percentage, linearity
8. Leakage: single-base valve: 0.01* rating Kv
9. double-base valve, sleeve valve: 0.5%* rating Kv

10.Cast hole. Flange connection meet ANSI 125/150# DIN PN10/16 BS4504 PN10/16 in the meanwhile.
11.Soft seat. Replaceable. Increase of service life.
12.Double half shaft without pin.
3. Manual Wafer Butterfly Valve Images：

Butterfly Valve DN200 Wafer Type BS Standard

4.Manual Wafer Butterfly Valve Specification：

5.FAQ
1. What is manual wafer butterfly valve?
A: Wafer style is the more common of the two and is less expensive than the lug style. The wafer style butterfly valve is just about the standard. It ís so common that no one even bothers to use the word "wafer" when ordering a butterfly valve. It is taken for granted that if a butterfly valve is ordered, a wafer style will be received.

2. How about the Installation of the Wafer Style Butterfly Valve?
A: Butterfly valves are installed by inserting the valve between two flanges using bolts or studs and nuts to hold it all together. This type of installation, of course, makes it impossible to disconnect just one side of the piping system from the valve. That benefit is received using the lug style valve.

3. What is the working principle of manual wafer butterfly valve?
A: A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The "butterfly" is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is fully open, the disc is rotated a quarter turn so that it allows an almost unrestricted passage of the fluid. The valve may also be opened incrementally to throttle flow.

Q: i was filling the tire on my car and the valve stem completely came out when i finished, quickly deflating the tire. i could push it back in but then the process repeated itself when i tried refilling it again. is there part of the stem i'm not seeing. the stem that i saw was long and straight and threaded. advise, thoughts? thanks.: are okorder /... to see a picture of one The valve is threaded into the stem The stem has threads inside and out ,internal threads are for the schrader valve and external threads are for the stem cap If the stem came out there is damage to the stem and it needs to be replaced ,but if the valve came out try using a schrader tool to screw it back in

Q: I have a question over my car. When a valve cover gasket(s) has a leak, will it still leak even after car has been off for a few days. It has also been starting to smoke after it has been on for 5 minutes. I don't move it. Thanks.: Hi so it has serious engine issues time to get this investigated by a mechanic.

Q: Around the relief valve there is water leaking it is not the valve it's self or the threads it's around the out side of it. The valve is on top of the heater: Hi, Unless the valve released isn't seating properly then you're better off to just replace it, maybe it's stuck thats where pressure is being released?

Q: I was just informed that my 4 year old daughter has been diagnosed with mild mitral valve regurgitation. I have been researching, but only find the information to apply to adults, not children.What general course is taken when dealing with children with this condition and what should I expect? Her pediatrician was treating her symtoms as asthma with breathing treatments, but, I was not comfortable and took her to my family physician, who sent her for the echo, which discovered this.I'm more or less just looking at our options...: I am not completely familiar with this specific heart problem but my son was born with a CHD (congenital heart disease) called Tetralogy Of Fallot and has had 2 open-heart surgeries. He is only 2 years old but is and has been doing fantastic. I do know a few other parents with children with mitral valve regurgitation and they have had to have mitral valve replacements. When and or if this needs to be done depends on how severe the regurgitation is. You can go a LONG time with regurgitation of any valve. My son actually currently doesn't have ANY Pulmonary valve what so ever right now and hasn't sence his last surgery when he was 9 months. We are not looking for him to have a Pulmonary valve placement until he is about 5-7, so that will be 4-6 years with no Valve at all at 100% complete regurgitation!!!!! Hope fully your daughters isn't too bad and you can wait a few years for her to have a new valve. Children are more likely to reject valves and the sooner it is put in the sooner she will need a new mitral valve replacement. Pretty much anybody that gets a valve replacement will have to keep getting them every 10-20 years of their life depending on what kind of valve you choose, when it is placed and how good they do. Good luck to you and your daughter - heart kids are the strongest!!!!

Q: Water is seeping up around relief valve threads. Tried tightening but could not get it any tighter.: Shut off the cold water supply to the water heater and also shut the gas supply or the heater control. Drain the water heater (this will drain all your house hot water as well). Open a hot water sink valve to let air enter. Drain the water until the water is lower than the threads. Cut or unsolder the joints needed to remove the threaded fitting. Remove the fitting, and bring it to a local plumbing supply house and get a new one. Install the new one with teflon tape. Shut the sink hot valve. Open the cold water supply valve on the water heater slowly. Check for any leaks. If its leaking, start over. If not resolder the copper joints together, and remember to purge the air through your sink again. Or just call a plumber or an HVAC company.

Q: How do you remove a richdel sprinkler valve, when I turn the body of it, it doesn't unscrew, it just turns in place.: if the valve itself has gone bad, then you can actually replace it without haveing to remove it. richdells are now called irritrol valves. they are not that hard to replace the guts and top part of the valve. if you can find the same valve off the internet or a landscape store, just take apart the old one and replace the insides with the parts from the new valve, and replace the top piece with solenoid as well. if you cant find the same kind of valve, just dig up a nice hole and cut the pipes and replumb it. thats pretty easy too. the more room you have on the pipe to cut, the easier it will go. but richdells are now irritrols. the parts will be the same, just have a different label. ive seen the richdells last over 20 years though good luck and hope this helps

Q: I've been working on cars since around march of 2012. I new. I have a set of 305 heads that were really dirty. It came from a 79 camaro that never had an Oil change. I took the valves out and the valves are pretty burnt. I was wondering If I cleaned them up would they still be good to use? The edges aren't rough or anything. Just let me know what is need to know please. The heads I know are still good.: hey why dont you go down to your local machine shop and ask a few questions,try and angle a cleanup job to trade for labor and experience.in other words,why dont you go ask your dadlove that commercial

Q: I drive a 08 lancer and I want to add a SRI. Can I produce the blow off valve sound like a turbo?: lololol (not at question just at other responses). NO u can't dude, a blow off valve is a pressure release system for turbos, Its purpose is to prevent compressor surge, its is a vacuum-actuated valve designed to release pressure in the intake system of a turbocharged car when the throttle is lifted or closed, any built up pressure from the impeller once the throttle is lifted the blow off valve releases the air to the atmosphere, you can buy different trumpets for a different sounds effect, engines that are have a turbo but no blow off valve have what is called a diverter valve that recycles the air pressure back into the air intake... If you mean a Fujita SRI exhaust system then it will just have a nicer deep tone, not a harsh high-pitched sound like the other rice burner exhaust systems..

Q: we are researching fluid power (pneumatics and hydraulics) in my high school engineering class. Does anyone know another name for a valve? I've been able to find different types, but I can't come up with any different names for a valve. Anyone have any ideas?: Valve comes from latin valva. There is not other name for it in engineering, but some times is referred as a cock, if the valve is used as shutoff valve, it is also known as shutoff cock. For irrigation, sometimes large gate valves are also known as gates. I can give you many names for the type of valves but I can't think of any other name that replaces valve.

Q: the ac replacement valve seems to be leaking i was wondering what is the average cost of having it replaced..: The ac replacement valve? Well, what you can do is to get the new ac to replace the old ac.

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