Spring slightly open closed safety valve

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Spring micro-open closed safety valve is suitable for oil, gas, air, water and other media equipment…

Productoverview:
A41H series Spring micro open type safety valve closed Suitable for the work temperature are less than 300 of the oil gas, air, water and other media of the equipment or pipeline. Type A41y-p/r is suitable for the work temperature are less than 200 corrosion of the equipment or pipeline, as the overpressure protection device. The standard flange jb/t...... 94/ series.
Two, work principle:
A41H series Spring micro open type safety valve closed Is an open by the inlet static pressure automatic pressure relief protection device, it is one of the most important safety accessories for pressure vessel, its function is: when the container pressure exceeds a certain value, depending on the pressure of medium itself automatically open the valve, rapid discharge of a certain number of media. When the pressure within the container is reduced to the allowable value, the valve is automatically closed, the pressure inside the container is always lower than the allowable pressure limit, automatically prevent possible overpressure due to accidents, so the safety valve is also known as the ultimate protection device for pressure vessels.
Three, Spring micro open type safety valve closed Structural characteristics:
1, spring micro open type safety valve has the advantages of simple structure, good sealing performance, accurate open pressure, discharge capacity, back seat pressure difference is small, easy to adjust.
2, the nozzle type seat: the seat for a cut of the nozzle seat that reaches the speed of sound at the outlet of the steam flowing through the valve, discharge coefficient, surfacing Stellite seating, erosion abrasion resistance, long service life.
3, thermal elastic disc: disc design for thermal elastic structure, using the medium pressure tiny deformation, improve the sealing ability, overcome the safety valve setting of the pressure is near before discharge phenomenon in the medium pressure. The valve sealing surface using advanced laser quenching technology, improve the hardness, wear resistance, impact resistance.
4: by adjusting the adjusting nut adjusting nut, adjust the amount of compression spring, the valve can conveniently and quickly get accurate setting pressure.
5, the back pressure adjustment set: auxiliary mechanism adjustment valve back pressure, through adjusting the back pressure adjustment, can get the right back seat pressure. When raised, the back pressure reducing valve. Cut, make the valve back pressure increased.
Four, spring micro open closed safety valve installation instructions:
1, the valve must be installed vertically, and best installed directly in the container or pipe joints. The import of the inner diameter of the joint should not be less than the safety valves.
2, the safety valve must be installed the export of appropriate expansion joint, to prevent the discharge pipe thermal expansion safety valve to bring unnecessary heat stress. The discharge pipe diameter than the valve outlet should be of large diameter and length as short as possible, avoid turn. Discharge pipe and expansion joint weight should not be in the safety valve should be fixed on the building.Distance between the center lines of the discharge tube and the valve between the as short as possible. For each set of safety valve should be installed separately discharge tube.
Exit 3, muffler to have enough area, prevent the discharge capacity of the valve back pressure effect.
The common faults and causes of five safety valve:
1, safety valve leakage: (1) valve spool and valve seat contact surface is not tight; (2) valve spool and valve seat contact surface dirt; (3) stem deflection.
2, the safety valve to the required pressure is not open: (1) to remove the spool and the valve seat, do manual exhaust test; (2) spring to adjust the pressure of the spring type safety valve is too large, should be re adjusted; (3) lever type safety valve of the hammer to move backwards, should be moved to the original constant pressure hammer the position, with the limit screw fastening.
3, does not require a pressure relief valve opening: (1) spring to adjust the pressure of the spring type safety valve spring failure is not enough, or lack of elasticity, should be reset or replace safety valve; (2) the lever type safety valve hammer hammer should be moving forward, to move to the original constant pressure position, with limited motion screw fastening.
Six, Spring micro open type safety valve closed The main components of materials:

Seven, Spring micro open type safety valve closed Dimensions and connection dimensions:

Eight, notice: (national standard)
1, A: product name, type, nominal diameter B, medium temperature, and the pressure range of C, whether there are accessories, delivery, special requirements so that we can correct for your selection.
2, if the unit has been selected by the design Zhongwei company valve type, please according to the parameters of the valve and direct sales center in great order.
3, when you use the occasion is very important or complicated, please provide the design drawings and detailed parameters, our engineers will concentrate on your expert review and analysis.