High Performance Safty 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

♦ 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


♦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.

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Q:where are angle valves used ?
I okorder.com/... I hope that I adequately answered your question. Wingman
Q:A customer has a G. E. SmartWater waterheater 7 the drain valve leaks, is there a gasket that can be serviced?
If it is a regular brass valve, you will have to drain the tank first, then replace the washer in the valve with one rated to be used for hot water. You replace the washer just as in any valve by removing the bonnet and stem. there you will see the washer. You may want to clean the area of any calcium carbonate that may had developed on the seat before putting it back together. If you decide to replace the valve, it is a 3/4 inch male NPT hose bib valve rated for hot water service. Personally, I've always thought that if I ever had to change one of those valves, that I would replace ti with a good ball valve that had a threaded hose end screwed into the discharge end for better drain flow. The whimpy valves that they put on water heaters is pathetic! If you use your favorite search engine and just search for water heater drain valve, you will find all kinds of cool replacement valves!
Q:Technical requirements when deciding upon a control valve are?
1] I assume that by control valve you mean a variable orifice valve, not an on/off valve. 2] An answerer to your other question listed Metallurgy, temperature, pressure and shutoff requirement To which I note that if you need a tight shutoff you should not trust a control valve to do that, but should add an on/off valve in series. Also, metallurgy covers corrosion requirements but not obviously so 3] To which I add: flow rate [or Cv] and pressure drop fail open or fail closed response time signal input [3-15 psi, 4-20 mA, 1-5V, etc] connections [ie, fitting type] packed vs sealed might need to look at hard seat materials and/or replaceable seats, to control erosion reliability, ease of maintenance, availability of spares, timing on that vendor permanence [ie, are they entering bankruptcy ?] Cost
Q:a technician has just replaced a valve guide, what's the next step?
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:leaky valve cover gasket problem, ok or not?
Valve cover gasket start leaking over time. That is normal. The thick oily gunk is from years of engine neglect. It doesn't happen over night. It's a good idea to clean the engine once in a while. As for the valve cover gaskets, they should be replaced (should have long ago) to prevent any more oily gunk from building up.
Q:EGR Valve drivability issues?
the egr valve can make the vehicle stall it can make it load up with fuel and make the engine miss fire
Q:what is a car valve?????
Cylinder head valves come in many designs and combinations. Their may be two, three or four valves in the head and combustion chamber that open and to let air and fuel in while the piston compresses the mixture and is ignited near top dead center. When the piston is near bottom dead center the exhaust valves open where the piston pushes the spent gasses out underneath the open exhaust valve. As the piston nears the top of the exhaust stroke, the intake valve opens to allow the air/fuel to enter the combustion chamber and cylinder bore. As the piston sweeps down vacuum is created in the cylinder and more fuel / air enters. When the piston reaches the bottom of the intake stroke, the intake valve closes in preparation for the compression stroke. Go to the Wikipedia Encyclopedia ot How Stuff Works to see how a four stroke engine operates. You'll see what the valves look like and how they work.
Q:My grandfather? Valve replacement??
It's a fairly common procedure. Though there are risks since it does involve open heart surgery, most bounce back quickly with recovery time depending on age and health history. I am sure he will feel much better post surgery. Good luck.
Q:Would a ERG valve cause sputtering or hesitating on my pontiac firebird?
An EGR valve being open will cause mostly idle problems and light throttle/initial take-off problems...mostly when you have a high manifold vacuum is when you end up with problems because of a sticking EGR valve. Just remove the valve and clean it by soaking it in something like B-12 Chemtool. I can garuntee you that valve is probably disgustingly full of carbon depending on the year.
Q:Butterfly Valve?
Why would you want to do that? The butterfly valve is a very important part of your engine. It is what gives your foot the ability to control engine RPM's. Therefor don't be stupid and mess with something that you will possiblly regret later

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