Safety valves are devices that automatically, without the aid of any energy other than the energy of the working fluid, release a certain amount of fluid so as to prevent the preset pressure from being exceeded.
They are used in energy facilities for water production.
Safety valves are manufactured with nominal diameters DN 50 to DN 150 (mm), calibration pressure up to 16 (bar) and fluid temperature of 150 (° C).
In normal operation of the plant, the safety valves are closed and provide the necessary sealing.
When the pressure increases above the permissible value, the set safety valve automatically opens and discharges the excess working fluid, as a result of which the pressure decreases below the permitted value. After draining the fluid, the safety valve closes and remains in that position until the pressure rises above the permissible value again.
The tightening nut is used to compress the spring, ie. to adjust the magnitude of the force in the spring, thus defining the valve opening pressure. The connection dimensions of the flanges are according to SRPS M.B6.011 and DIN 2501.
The housing, the shut-off body, the spring and the plain bearing supports are made of structural steel, and the shut-off body supports and the sealing surface on the housing are made of stainless steel.
The sliding sleeves are made of special grey cast iron, and the spring is made of suitable steel for springs.
Depending on the working temperature of the fluid, the sealing elements are made of EPDM or special EPDM.
Full specification find below