Pressure Reducing Valve
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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: What is it for? I was given a data set which is a result of antisurge valves testing every 2 seconds or so. (more than 1000 rows, measurements by time) I have no idea how to start analysis of the data like that. Can anyone help?
- An anti-surge valve is a valve that automatically opens to produce a flow through a centrifugal compressor to prevent surging of the compressor at a low flow rate. At surge conditions, there is no forward flow in the compressor and the compressor shaft will move foreword and backwards against the thrust bearing. This is damaging to the compressor and causes a terrible noise, that once you hear a surging compressor, you will never forget it. On an air compressor, the surge control valve will discharge to the air through a muffler. For process gas, it will discharge to another part of the process. The answer to your question depends on whether the data relates to the flow through the anti-surge valve of the compressor. It could even be a record of how fast the surge control valve operates. Based on this, no one can give you an answer for certain. TexMav
- Q: i was thinkin i needed rings cause my car was smokin like hell and had a bad compression test on one cylinder. anyways i got the head off and my valves are caked with black **** all down one side and the others are completely white. i dont know if when the car turns off if they're supposed to seal but four of them were about a quarter inch off the head. before i tested everything i was smokin like hell and barely runnin and you could hear a knockin sound in the exhaust at the rear of the car. could the head be the problem or still sound like rings??
- Bad rings cause excess blow by in the crankcase causing vapors (heavy) to come from the dipstick tube as well as the valve cover. I can smell the exhaust smell in the breather vapors not just oily smell. Valves mostly cause smoking out the tailpipe as oil enters the cylinder and burns. excess oil usage is common as well. A compression test will indicate bad rings as one or 2 cylinders will read much lower on the gauge. valves can be seen as bad compression as well but often show more in the leak down in the gauge. the condition you stated of the valves is from oil entering the cylinder heads and burning. this is usually valve guides.
- Q: the valve stem?
- you cant get used one out and re-use it they tear up when you remove them unless their the ones with the nuts on them that bolt in,pull in types cant be re-used ,any parts store sells those in a pack of 4 or most tire shops will give you one if you ask them for it,good luck
- Q: I think on old AC units They had a different valve than the shrader. It might be called a king? Anyway, I can't get my gauge to read the pressure. The needles don't move at all. How can I measure, refill this type of HVAC?
- no offense,but i'm a little concerned that you have gauges and the knowhow to check freon,but dont know about different types of service / access valves.apply any advice at your own risk......anyway,,if you remove the large cap that covers the stem of the service valve you need to [ with gauges already connected] turn the stem clockwise to open it so your gauge can read the pressure,[ they make a special service valve wrench for this purpose,an adjustable wrench usually will work,but be careful not to strip the square end of the stem if its old and doesnt want to turn],,only turn the stem one or two times around,,DO NOT keep turning it clockwise until it stops or you will close the valve off....when finished checking with gauges,be sure to turn stem counterclockwise until it stops turning,,then you can safely remove gauges..if you remove gauges without turning stem counterclockwise,the the freon will blow out of the valve when gauges are removed,,not a pleasant experience,, be sure to where gloves and goggles,esp if you arent used to doing this......dan
- Q: i have a mitsubishi eclipse 1993 and its running too lean my old smog paper said the hc's (hydrocarbons) are too high. would a egr valve temp sensor make it do that if its fualty? or could it be someting else?
- To man Hcs means you car is running Rich not Lean but yes an EGR can cause that an egr takes the exaust gasses and recirculates it back into the manifold soo if your lettn a few hcs outta the exhaust valve then the erg would recirculate it but there is plenty of other reasons for your car to runn to rich
- Q: I have replaced the rubber washer in the valve and when I pull up on the float arm everything seems to stop then shortly thereafter air bubbles start coming out of the bottom of the fill tube. How could air be getting thru the valve without water which would cause the shutoff valve to tighten?
- air in supply line
- Q: I went to turn the water off with the shut-off valve so that I could do some work on the toilet tank (replacing old and leaky fill valve) but the water won't shut off. I'm assuming that I'll need to replace the shut-off valve itself but could anything else be causing the problem? The funny thing is, the leaky fill valve that I wanted to replace has now stopped hissing and leaking and the tank seemingly fills fine. But of course the water can't be turned off completely.Just wanted to check make sure that there aren't anything else I should do or consider before I went off to replace the shut-off valve.Thanks
- No. Very simply if the toilet shut-off valve doesn't stop the water flow, it is faulty and should be replaced. However, the shut-off valve is only used to service the toilet, and if your toilet is operating okay, don't mess with it. If you're not that ambitious, the next time you need to service the toilet would be an opportune time to change the valve. Good luck and God Bless!! Steve
- Q: The atrioventricular valves will be open whenA. Atria are in diastole and ventricles are in systole B. Pressure in the ventricles is greater than the pressure in the great arteries C. The ventricles are being passively filled D. The ventricles are in isovolumetric contraction
- Answer: (c) The ventricles are being passively filled. During diastole, a normally-functioning mitral valve opens as a result of increased pressure from the left atrium as it fills with blood (preloading). As atrial pressure increases above that of the left ventricle, the mitral valve opens. Opening facilitates the passive flow of blood into the left ventricle. Diastole ends with atrial contraction, which ejects the final 20% of blood that is transferred from the left atrium to the left ventricle. This amount of blood is known as end diastolic volume (EDV), and the mitral valve closes at the end of atrial contraction to prevent a reversal of blood flow. Mitral valve also opens when right ventricle is passively filled.
- Q: i ha valveve a knock on the driver side .and i have to remove the intake manafold to get to the valve
- valves don't knock and you can't get to them through the inlet manifold if it's the lifter you may be able to get it by taking the valve cover off but even then you sometimes can't and have to remove the camshaft
- Q: I want to find a cheap valve that will let me take a breath in from one place then exhale through a tube going out so that i can attach an airbag to the breathing end and make a little diving lung.
- Creating a proper valve system for the creation of a diving lung is not as simple as you think. You require carefully balanced directional pressure regulation valves. A simple one-way valve (AKA check valve) would remain open and release all the air from the airbag as soon as the airbag was subjected to water pressure.
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Pressure Reducing Valve
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- -
- Supply Capability:
- -
OKorder Service Pledge
OKorder Financial Service
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