Butterfly Valve Turbine Type DN250 with Hand Wheel BS Standard

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100 set
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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.

2.Main Features of the Manual Wafer Butterfly Valve
1.Simple and compact construction. Small in size and light in weight. Easy transportation, installation and maintenance.
2. Quick 90 degrees on-off operation. Minimized operating torque ,energy saving.
3. Excellent sealing performance with no leakage. Long service life.
4. Wide selection of materials ,applicable for various media..
5. Flow curve tending to straight line. Excellent regulation performance.
6. Bubbles-tight sealing with no leakage under the pressure test
7. Wide selection of materials, applicable to various mediums
3.Manual Wafer Butterfly Valve Images:
 Butterfly Valve Turbine Type DN250 with Hand Wheel BS Standard
 Butterfly Valve Turbine Type DN250 with Hand Wheel BS Standard
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)
Disc: DI/ALB/Rubber lined Disc/1.2501/1.4529/CF8/Hastelloy Alloy/Monel
Suitable temperature: -10~120
Medium: Fresh water, sewage, sea water, air, vapor, food, medicine, oils, alkalis, salt etc. 
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.

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Q:in a blowback paintball gun, what does the valve do & how does it work?
The majority of blowback paintball guns use a pin valve, which is opened when struck by the hammer. The hammer is held in the back position, with the spring compressed, by a sear. When the trigger is pulled, the hammer is propelled forward by the spring, into the valve. These sorts of markers generally use a “stacked tube” design, in which the valve and hammer is contained in the lower tube, while the bolt, which is connected to the hammer, is in the upper tube. The gas released by the valve is then simultaneously channeled up to the bolt to fire the paintball, and back to push the hammer back into the ****** position (hence the name “blowback”). Poppet valves are usually easy to replace and require little, if any, maintenance. The downside to this design, however, is its high operating pressure, which leads to a larger recoil and arguably less accuracy. The valve is usually designed to accommodate a specific operating pressure. Low pressure valves provide quieter operation and increased gas efficiency when tuned properly. However, excessively low pressure can decrease gas efficiency as dramatically as excessively high pressure. The volume of gas released by the valve directly affects the paintball's velocity. The velocity adjuster alters the pretension on the hammer spring which controls how long the pin valve is held open for, or more correctly how much gas must be released to push it back into the ****** position. EDIT - Sorry but wouldn't even know where to start on designing a valve.
Q:Valves Knocking?
Have you checked or replaced the knock sensor? Its not the valves you're hearing, the engine is pinging due to overadvanced ignition timing. If you've futzed with the distributor, put it back where its supposed to be. Then check the sensor and wiring, which is on the side of the engine block. Use spark plugs with one heat range cooler will help the pinging. And you've got to run at least 2 tanks of high octane before you see the effects. Change vacuum lines, fuel and air filters and O2 sensors as well.
Q:valve oil mass order?
I wouldn't bother with that. I would go to Woodwind/Brasswind, and get their brand of valve oil. Very economically sound, and a very good product. Why go to all the trouble of getting bulk stuff and trying to put it into those little bottles. Get the company brand stuff. It works wonderfully and is half the price. Sometimes you pay for the names al cass, or holton, when all you are getting is just oil.
Q:inner tube valve (Specialized) too large for the hole in rim (Bontrager)?
Your rim is drilled for Presta valves, and the inner tubes you are trying to use have Schrader valves. Either buy the correct inner tube or drill the hole larger to accommodate the larger valve
Q:92 Chevy Silverado 1500 question and head and valves?
About $1,200 to $1,500 depending on the shop labor rate. But the job is almost pure labor and (with the exception of the machine work on the heads) almost any novice mechanic can do it. You could save yourself a bundle if you are capable of removing the heads yourself and then reassembling the engine with the reconditioned heads. The machine work to do the valve job (depending on the automotive machine shop you take the heads to) will only cost about $180 to $200 per head and that includes hot tank cleaning, magnaflux checking for cracks, resurfacing the heads, reaming and replacing the valve guides, resurfacing the valves and valve seats, and installing new valve seals. Your only other expense then would be the top end gasket set (head gaskets, exhaust and intake manifold gaskets, and valve cover gaskets), a new thermostat and gasket, fresh anti-freeze, and a fresh oil change and filter. You can ask the machine shop any questions you have concerning the tightening sequence and torque specifications of the heads and intake manifold and they will give you that information. If you are not sure you can do the job yourself or you don't have the tools, maybe you have a family member or a friend who is a do-it-yourself mechanic who will help you. The most critical part of doing the job yourself is to be careful to torque the heads and intake manifold to the proper specifications and in proper sequence.
Q:What causes Emergency Valve on Boiler to Leak?
The TP valve will naturally wear out over time, if it has never popped open the washer inside of it has hardened, when you opened it it didn't seat properly when it closed back up, causing the drip. This is not an unusual or dangerous condition, the TP valve will usually wear out before the boiler does, it can be quickly and easily replaced. The valve will still function with a leak, but this reduces the efficiency of the boiler. DO NOT, under any conditions, DO NOT plug the leak by plugging the opening on the valve, this creates the potential for a very dangerous condition, let it drip until it can be replaced.
Q:Tricuspid Valve surgery?
Any type of valve surgery involves exposing the aorta of the heart, therefore it is a form of open heart surgery. Over time, this has become a relatively basic procedure for heart doctors and it has a success rate of almost 80-95%. There is a chance that you might need another surgery afterwards, but that only happens in about 5-10% of patients that get the surgery. The survival rate for this operation is very high and only 5-10% of patients experience any negative effects during the surgery. This includes infection, stroke, allergic reaction, or bleeding. I will keep you in my prayers Alex. Best of luck to you!
Q:Gas Shut off Valve??
Do you have a meter some where outside of the house? The shut off valve is usually real close to that. It is the type that you have to take a wrench to turn it off. I'm not trying to insult you I'm just trying to help. There will be a narrow bar on it and it will be pointing parallel to the pipe at that point. You will have to use a crescent wrench and turn it 1/4 turn until it is cross ways to the pipe. Good Luck
Q:function of idle air control valve?
As long as the eng check light isn't on then it will harm nothing. If the light is on but the van runs good it's because the computer is running in a fixed parameters ( emergency mode ) and it's not running at top potential.
Q:Trumpet valve problems!!!?
There's a good chance that the casein is bent from being dropped. Or the valve guides are wore out. Hopefully the later because it's the least expensive. New ones can be ordered. If the casing is bent maybe a repair tech can do some straightening or possibe have the casing re-honed.

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