Butterfly Valve DN300 Turbine Type with Hand wheel BS4531

Butterfly Valve DN300 Turbine Type with Hand wheel BS4531 System 1

Butterfly Valve DN300 Turbine Type with Hand wheel BS4531

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Min Order Qty:: 1 set

Supply Capability:: 5000 set/month

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1. Manual Wafer Butterfly Valve Description：
A butterfly valve consists of body ,stem ,disc , actuator (manual actuator, worm-gear actuator , aerodynamic actuator or electric actuator) , and wafer type butterfly valve can implement the process for turning on turning off and regulating the flow by the circumrotation of stem and disc that is droved by actuators.

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.

2.Main Features of the Manual Wafer Butterfly Valve

1. Small in size and light in weight, easy instillation and maintenance. It can be mounted wherever needed
2. Simple and compact construction, quick 90 degrees on-off operation
3. Minimized operating torque, energy saving
4. Flow curve teeing to straight line, excellent regulation performance
5. Long service life, standing the test of tens of thousands opening/closing operations
6. Bubbles-tight sealing with no leakage under the pressure test
7. Wide selection of materials, applicable to various mediums
8. The material of valve body: cast iron, cast steel, cast stainless steel and so on.Soft seat. Replaceable. Increase of service life.
9Double half shaft without pin.Square and short neck. Easy to stick scutcheon and cost saving.
3. Manual Wafer Butterfly Valve Images：

4.Manual Wafer Butterfly Valve Specification：
Size: DN50-DN1000
End flange: ANSI B 16.1,EN1092,AS2129
Face to face: ANSI B 16.10
Top flange: ISO 5211
Normal pressure: PN1.0/1.6MPa(150/200PSI)
Body: CI/DI/WCB/ALB/CF8/CF8M
Disc: DI/ALB/Rubber lined Disc/1.2501/1.4529/CF8/Hastelloy Alloy/Monel
Stem: 410/416/304/431/17-4PH/316/monel
Seat: NBR/Hypalon/EPDM/Neoprene/NR/Wear-Resistant EPDM/Viton/Silicon/Heat-Resistant EPDM/White EPDM/EPDM(NSF)/PTFE
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 have a 1997 Toyota Corolla. My check engine light has been on. I tried to get my car smogged and it failed. I then got an oil/air filter change and just yesterday I replaced the EGR valve which was the result given after 2 diagnostic tests. The mechanic gave me my car and the check engine light was off, I've only driven about 5miles and the light is back on. I have to pass smog asap to register my vehicle. I plan on calling the mechanic back and telling him the light is on, but could it just be a sensor?: Let's start from the top. Your check engine light has been on and you took it to be smogged and you probably didn't know that the check engine light on is an automatic fail. So you get the oil/air filter changed without a reason, just because. Next, the diagnostic tests point to the EGR valve so you have a mechanic replace it, that is instead of having the mechanic figure out the real problem The mechanic could have replaced the valve or not, but you didn't get the old one from him, so you don't know if it's been replaced. He disconnected the battery so the light went out. Now it's back on so the problem isn't fixed. Could it be a sensor. Well, sure, but proper testing would tell you if it was. My GUESS is the EGR valve and ports where the EGR attaches just need to be cleaned out but without proper testing, that is just a guess. My suggestion is find a different mechanic, one who doesn't just disconnect the battery to turn the check engine light off, and don't go in telling this new mechanic what you think the problem is because you don't know.

Q: What are the names of the main arteries and valves?????????REALLY NEED ANSWERS TODAY!!!!!!!!!!!: Main arteries: Aorta (oxygenated blood from heart to body), Pulmonary Artery (DEoxygenated blood from heart to lungs). Main Valves: Tricuspid valve (separated right atrium and ventricle to ensure correct flow of blood), Bicuspid Valve( separates left atrium and ventricle), Aortic Valve( ensures blood flow from left ventricle into aorta). hey sorry only saw ur question today:P hope it helps!

Q: i have a leak on the front of that valve cover and the oil is going down to the headers,,how can i fix the problem.?how do i install da gasket do i need any special things??thanx for tha help: have a new gasket install !!

Q: This happens when the sprinklers are ON and goes on for a minute after the sprinklers go off. Should I replace the whole valve or do I need to check the diaphram or solenoid head? In addition to leaking, I have noticed a more potential problem - water hammer. As soon as the sprinkler goes off, I hear this loud banging noise from the pipes underground. Water pressure is fine ~ 50. My guess is air inside the pipes is causing this. Is this because of faulty valve which is leaking?Also, any difference between the valves that are sold in Lowe's and Home Depot to that of commercial valve? My lawn guy says commercial valves last a long time.: The water hammer is due to the sudden closure of the control valve. They don't turn off slowly. The sudden shutoff of the valve causes the inertia of the water to slam against the end of the sprinkler pipe. You can device from a well stocked hardware store to place in you water line to reduce or eliminate the hammer. As for the leaking problem, I disassembled the control valve and found the diaphragm out of position. On mine, there is a very, very small key on the diaphragm that aligns it with the case. Also check for debris in the solenoid valve seat and anywhere else in the valve. I can't address commercial vs residential valves other than if the valves are brass, they are more durable.

Q: ok im buying an aftermarket blow off valve for my car. the car itself is taken apart completely and i have no idea wht vacuum lines go where. i know tht the top nipple of the bov has to be connected to the throttle body but it has 5 lines. does it matter what line is connected to it?: Don't do it. First of all, if you knew enough about turbo charging or supercharging, blow off valves, bypass values, hooters, etc., then you would have known we need to know the size of engine, model of turbo, piping diameter, etc. The actual control lines are not that complex. By using your tongue you can tell what each line is ported to, and then you just need to know if you blow off valve is operated by vacuum or lack of vacuum. They make both types. And your throttle body will have ports on both sides of the plate. And yes, it does very much matter. Turbo charging is not for the novice to fool around with.

Q: Check engine light came on. Had a diagnostic exam run. EGR Valve is gone. Do I REALLY need to replace this valve, or will the car run just fine without it? 1999 Chevy Malibu.: EGR or ''Exhaust Gas Recirculation'' system assists the engine during warm up (from cold start to operating temperature). By circulating hot exhaust gases through ''channels and ports'' in the intake manifold, heads, etc. the engine heats up faster and more evenly. Without it warm-up may take a little longer and it may run a little rough until it has warmed up.

Q: What are the function of reed valves on a motorcycle?: GuardrailJim and Badobses---, you both got it almost right. You other guys, take a lesson. First, Jim Bad should have said fuel is pulled into the crankcase, through the reed valves. The crankcase is a small sealed off area on a two stroke, just larger than the flywheels. Old days, the piston skirt was used for a valve, opened when the piston was on the way up, closed on the way down. Both systems use the piston skirt to open and close the exhaust port, which opens when the piston is on the way down on the power stroke, normally about half way, give or take a bit. Intake, into the combustion chamber starts when the transfer ports open, which is a bit after the exhaust port opens, and closes just a bit after the exhaust closes. With the reed valve, mixture is pulled into the crankcase at any time the case pressure goes below atmospheric. Also stops, by the reed valve, as soon as pressure goes over atmospheric. This lets the engine induce a fair amount more mixture than was possible with a piston port, and no blow back of mixture through the carb. This is a simplification of a very complicated piece of air flow. One will know chap I know, who also built some of the best, if not the best 2 stroke exhaust went back to college, got a Doctrate on accoustics before starting design of his expansion chamber systems, and THEY WORKED! Sorry, I did not mention disk valve engines the first time, in effect kin to the piston port, except they are timed for opening and closing to be at proper time to get maximum flow into the crankcase. Less blow back than with a piston port. Between piston port and reed in power, all else equal. Reed valves are all-round best. Cheers, Tomcotexas.

Q: How do you know if you need a new EGR valve or if you just need to clean it?: You obviously had a parts store diagnosis so maybe you should ask the person that put the idea in your head that the EGR was a problem for the answer. Did you know that an EGR code can be caused by numerous other problems.