Pressure Reducing Valves
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Application:
A pressure relief valve (PRV) is a safety device that relieves overpressure in a vessel or system. When the pressure of vessel or system increased beyond the specified design pressure or maximum allowable working pressure, PRV will be opened automaticly to relief the overpressure for proteding the vessel or system. The PRV will be closed if the pressure reached specified design pressure so that to ensure the normal operation and protect the vessel or system.
Our Pressure Relief Valve has been designed and manuractured according to following Standard:
♦ ISO 4123-1 Safety Devices for Portection Against Excessve Pressure
♦ API STD 526 Flanged Steel Pressure Relief Valves
♦ API STD 527 Seat Tightness of Pressure Relief Valves
♦ ASME Boiler and Pressure Vessel Code Section VIII Division 1, Rules for Construction of Pressure Vessels
Peformance:
♦ Type: Conventional, Bellows
♦ Size:1" D 2"- 8" T 10"
♦ Class:150lb~2500lb
♦ Temperature:-268~+538°C
♦ Fluid: Gas, Steam, and Liquid
♦ Material: Carbon steel, Stainless steel, Alloy steel
♦ The allowable tolerance of the set pressure: ≤±3%
♦ Overpressure: ≤10%(gas)/≤20%(liquid)
♦ Blowdown: ≤10%(gas)/≤20%(liquid)
♦ Tightness: conforms to API STD 527
Features:
♦The solid nozzle is screwed into the body, which makes the maintenance easy.
♦ The shape of the disc holder has been designed to enhance the effect of the fluid thrust for an instant lift of the disc.
♦ Blowdown control is provided with adjustable nuzzle ring only.
♦ The adequate terials and clearance between disc holder and guide , spindle and adjusting screw assures disc to lift successfully.
♦ The surface of both the disc and the nozzle seat are deposited with Stellite. Excellent flatness and surface finish of the seating surfaces by precision machining and lapping assure pressure relief valve to have high degree of seat tightness and long using life.
♦ The bellows of balanced bellows pressure relief valves can not only avoid and effect of variable back pressure in the system , but also protect spring and other trim components from corrosive media.
♦ Materials are chosen carefully , and the manufacture of the spring and the bellows has strict technological process. Each of them is tested and checked strictly.
- Q: i have a valve seat pop out and it did some damage my question is can it be fixed i took it to a machine shop the guy look at me with a little confusion he said it cant be done anyone out there have another answer
- Replacing the valve seat can be done, but if there is enough damage, it still may be risky. Swapping the head for a rebuilt one is much safer. You turn in the old head as a core, and no one will even care that is may not be rebuildable. They are only $159, exchange.
- Q: i just replaced the head gaskets on my 1991 Acura Legend and When i put the timing belt on somehow it slipped and came loose I than tried to start it(not knowing it came loose) and it cranked hard and strong but no start. I just retimed the engine and put new timing belt set on it and when i started it the car blows grayish blackish smoke from the exhaust and has a really crazy idle. Could the valves be bent
- Misfiring at low engine speeds. Usually, this would happen if you have had a leaking exhaust manifold gasket for a while which would actually cause the valve to get burned from high temperature. An actual BENT VALVE is easily spotted if you remove the valve cover to the suspect area and relieve the stress on the valve stem when the engine is at TDC on this cylinder. If there is too much play , or lash, between the cam and the valve stem, then the valve is not closing and is therefore, BENT!!
- Q: I accidentally pushed the pressure release valve on my hot water heater last night. It ran for a while, and did not stop. I turned the water off, the valve on the cold water piper above the water heater, and it stopped running. Will this stop running at some point? The overflow tray fills too quickly for me to drain it. When I turn the water back on it starts pouring out again. HELP!!!
- Tap that valve gently a couple of times with a hammer. Those valves are rarely used and sometimes stick. Remember, I said gently. If that doesn't make it close, replace the valve. Keeping the cold water shut off prevents the heater from filling. If there's enough pressure in there to keep allowing hot water out, it will eventually lower the water level in the tank and could damage the heater. Here's how to fix it. If it's a gas heater, turn the thermostat to pilot. Open the drain and lower the water level in the tank, or use this opportunity to drain it completely and flush the system. Remove the old TP (temp and pressure) valve and take it to the hardware store to use as an example for a new one. Replace the valve and hook up the drain. Close the drain valve near the bottom of the tank and open the cold water valve on the top. You can leave the TP open until water starts to come out of it, to allow you to burp the system. Now, turn the heater back on and set the temp to 120 degrees f. I'm a little concerned that the heater is not plumbed to drain into the house plumbing or at least to the outside where it won't cause any water damage. Good luck.
- Q: Does a diverter valve even make a sound at all?
- Diverter Valve Sound
- Q: How do you ajust valves on a 1955 chevy 265 cu, in engine. I Believe they are hydralic valves.
- There are books at the library . ask around your local car clubs this can be done but it's going to take some doing .Motor manuals have the ins and outs. I would read up on it first , Did you mean hydraulic lifters. I used to have my heads done for me then just Replace and adjust the lifters.
- Q: My vehicle has 160,000 miles and has burned 2 quarts of oil at 3000 miles. Someone told me to change the PCV valve because sometimes a bad PCV valve can cause oil consumption. I appreciate your assistance.
- Pcv Valve Symptoms Ford
- Q: I noticed when I pulled my pcv valve off the valve cover the entire guts were missing. what would this make the car run like?
- It would just make a bunch of oil pool up in the intake. If it was plugged it could damage seals.
- Q: When you regulate flow with a valve in a fluid circuit, obviously the flow changes. But mathematically, it changes in function to what? the minimum cross-sectional area? I mean it has to have something to do with some integral of sth (since a valve can change the cross-sectional area of a portion of the tube with length of almost zero and the flow would still change dramatically). I have no idea how to work this through. Can you tell me what changes when you close a valve, which makes the total flow change?Please answer asprecisely as possible, this is for a college essay! thanks in advance!
- The flow coefficient is a measurement usually given for a valve fully open, identified in the specs as the Cv. It basically tells you how much flow you'll get through the valve for a given pressure differential across it, or conversely how much your pressure will drop if you force a certain volume through it. Some valve types are effectively orifices (gate valves) or short lengths of pipe (non-full-port ball valves), others like solenoid types have more complicated internal paths the reduce flow because of the fluid having to change directions in addition to squeezing through orifices.
- Q: we are having diffaculty with our spa and our jacuzzi. sometimes when we try and heat the spa the pool gets heated.first of all we would like to make sure the valve diagram is right because sometimes also the spa dumps about half into the pool. frustfrated can any one help?
- You have one or more faulty valves or you've got them turned the wrong way for the operation you want. You also may have a check valve that's going bad. The problem is that I'd have to see the setup around the pump and filter to even get an idea of what goes where. My pool has electric activators for the valves that allow automatic operation from inside the house. I adjusted one incorrectly once and it activated the valve backwards, and I had to readjust it.
- Q: what is engine valve timining ?
- The valve's are in the head or head's and they need to be lined up with your crankshaft in order for the engine to be in time , if they was'nt in time with the crank they would hit at the wrong time and your engine would be junk.
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Pressure Reducing Valves
- Ref Price:
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- Loading Port:
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- Payment Terms:
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