Pressure Reducing Valves
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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:Also, Is a pneumatic control valve an ATC or an ATO; is it a FO or FC valve?
- THere are a large number of types of valves; ball, gate, globe, needle, etfc. I suggest you look up valves on wikipedia. ATO = air to open; the valve has a pneumatic operator with a spring returning it to closed when the air pressure is removed ATC is the reverse FO = fail open; if the actuator fails the valve will be open. Actuators are made ATO, ATC, and air to move either way [no spring]. The latter would be your FLP. Control valves, by which I mean a proportioning valve or valve with a variable open area, with a 3-15 psi control input, are usually ATO.
- Q:Friends,is there anyone know about LinX(Linear Exchage)Valve,how they work.thanks in advance
- A valve is a device that regulates the flow of substances (either gases, fluidized solids, slurries, or liquids) by opening, closing, or partially obstructing various passageways. Valves are technically pipe fittings, but usually are discussed separately. Valves are used in a variety of applications including industrial, military, commercial, residential, transportation. Plumbing valves are the most obvious in everyday life, but many more are used. Many valves are controlled manually with a handle attached to the valve stem. If the handle is turned a quarter of a full turn (90°) between operating positions, the valve is called a quarter-turn valve. Butterfly valves, ball valves, and plug valves are often quarter-turn valves. Valves can also be controlled by devices called actuators attached to the stem. They can be electromechanical actuators such as an electric motor or solenoid, pneumatic actuators which are controlled by air pressure, or hydraulic actuators which are controlled by the pressure of a liquid such as oil or water. Actuators can be used for the purposes of automatic control such as in washing machine cycles, remote control such as the use of a centralized control room, or because manual control is too difficult; for example, the valve is huge. Pneumatic actuators and hydraulic actuators need pressurized air or liquid lines to supply the actuator: an inlet line and an outlet line. Pilot valves are valves which are used to control other valves. Pilot valves in the actuator lines control the supply of air or liquid going to the actuators. The fill valve in a commode water tank is a liquid level-actuated valve. When a high water level is reached, a mechanism shuts the valve which fills the tank. In some valve designs, the pressure of the flow fluid itself or pressure difference of the flow fluid between the ports automatically controls flow through the valve. In an open valve, fluid flows in a direction from higher pressure to lower pressure.
- Q:Model 28 BS 12.5 HP engine intake valve sticks. Please advise.When under a full load like tall grass, it runs great, but when the load is not as heavy, the intake valve sticks open, spewing gas back through the carb and mis-firing.
- Are you sure that the valve is sticking or is the carburetor flooding?
- Q:Okay, I got a 347 stroker and I noticed a spot that was leaking under one of my valve cover gaskets. So I went ahead and bought new gaskets. But before I replaced the gaskets I noticed that my valve cover bolts wasn't tight. So I basically went out for nothing and get new gaskets. Anyways since I couldnt return them, I went ahead and changed the gaskets. And I tightened all of them pretty tight. And I noticed that I still have an oil leak at the same valve cover gasket at the same place. Why is this? I also used cork gaskets, did I tighten them too hard? How hard should you torque valve cover bolts/
- cork gaskets have to swell use rv gasketseal around bolts and corners
- Q:The water inlet valve on my Kenmore washer leaks. Is there an easy way to replace it? Last time it broke they charged me over $100 to fix it.
- see if you can find a manuel on it also try tracing the wires that go to the valve and back track from there. there is also water level switches and tempture switches that might be messed up
- Q:i believe it's to do something to the valve guide to make it the right clearance n not go straight to the valve seat right? or is valve seat next?
- Once the valve guide is installed, it has to be reamed to fit the valve stem. After it has been reamed to fit the valve stem, the new valve needs to be seated in. (The valve seat should have already been done by this point) This can be done with a machine tool, or it can be ground in by hand with valve grinding compound. Once this is accomplished, the valve is removed, everything is cleaned thoroughly, and the valve is reinstalled with the spring and keeper. Normally you would do all the operations to all the valves at the same time. (That is, you don't grind in one valve, then go back and ream another valve stem. You do all the operations required at one time. So you would install all the valve guides, then ream them all, then grind or face the valve seats, then check the valve contact area, then remove all the valves, clean the head and valves up, and then reasemble into a completed head unit.)
- Q:where in the engine is the heater control valve located on a 2001 toyota corolla
- standing okorder / sign up and post in the 8th gen corolla forum. great ppl. been a member for years.
- Q:My fortuner stalls without warning, but restarts quickly, according to Toyota service center, we need to replace the suction valve, can someone please tell me how a suction valve work
- you need to be more specific. there are 100 things on a car that could be called a suction valve. Right off the top of my head the only valve that could do that is a EGR valve. If it gets stuck open the car will stall, but it will start back up after the valve closes again. The OBD will tell you if the EGR valve is bad, but other than that I can't say.
- Q:I just installed three anti-siphon valves(jar top,orbit) for a sprinkler system the main water line is 3/4 then goes into my manifold (pvc)3/4 schedule 40,usually when you turn on the water it comes to a stop where you re valves begin then you either open them manually or their set up through you re timer, the problem im having when i open the main water line the water goes straight through the valves without me even opening them my question is can it be to much pressure or what can the problem be? any info helps thank you
- As George mentioned, I'm wondering if you installed them backwards; it happens (I've done it anyway). The other unlikely possibility is that these valves default to open unless they are powered closed (so try powering them to close). If they power to shut-off and open when they lose power, then you probably want to send them back (you will end up with a flood every time your system goes down). The other possibility is you got a bad batch of valves. I would: - Go to manufacturers website and check their FAQ section - Go to manufacturers website and check the specs on your valve model (normally closed?) - Call the manufacturer with valve in front of you and have them trouble-shoot
- Q:My car had white smoke coming out from the exhaust.After talking to my mechanic, he said that the valve seat is faulty in which i suspected earlier. He also told that my car need to be overhauled. What would a faulty valve seat cause my engine?
- It's the doctrine of alternative and end result. You made unhealthy offerings and are actually paying the penalties. If you had constant the EGR valve proper whilst the investigate engine gentle got here on, you do not need had the tickets. Cost of an EGR valve is beautiful small. But you selected now not to try this. When the plate ran out, you knew it was once out, and made the alternative to hold riding. When you obtained the primary price ticket you might have stopped then, and constant the vehicle and obtained present so there could be no MORE tickets. Again you made a alternative now not to try this, and hold riding, and get extra tickets. How lengthy could it have taken for you, or your husband, to make a sensible mobilephone name to the courts and give an explanation for your clinical situation? The courts could have gladly given you an extension to your look. But once more you made a alternative to disregard it till there was once a warrant on your arrest. Even now you've gotten made a alternative to invite a number of strangers at the Internet as an alternative than name the courtroom approach or authorized help to discover your choices. So, welcome to the exclusive global of penalties. Good Luck.
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Pressure Reducing Valves
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