Common failure reasons for the prevention and elimination method sealing surface relief valve leakage due to improper manufacturing low accuracy, assembly, pipe load, etc, make the parts different heart repair or replace the unqualified parts, repackaging, eliminate pipe additional load, so that the valve is in good condition installation tilt, and the valve seat valve produce displacement, and lax contact shall be installed upright, cannot tilt spring two face is not parallel or assembled skew; Leveraged to leverage fulcrum deflection or wear and tear, and the valve seat valve contact pressure uneven repair or replace the spring, repackaging; The wearing parts, repair or replace the fulcrum eliminate the fulcrum of the migration, the contact pressure and the valve seat valve spring fracture replacement spring, replace the spring quality should comply with the requirements of the manufacturing quality, high temperature or corrosion and other factors make the change according to the causes of spring, spring relaxation if is improper selection should change the relief valve disc and seat sealing surface is damaged, sealing surface impurities, which sealing surface cannot be closed grinding sealing surface, the surface roughness is not lower than open enough ( With wrench) Relief valve purge impurities or remove the relief valve cleaning; Of impurities in the medium, more suitable for selection of rubber, plastic sealing surface of a class, or with a wrench safety seat connection thread failure or lax or repair or replace the seat, keep the thread joint don't leak valve opening pressure closely with equipment normal working pressure is too close, so that the sealing pressure is reduced, when the valve is prone to leakage based on the equipment during the vibration or pressure fluctuation intensity, and to make appropriate adjustments in the valve opening pressure sports parts jam phenomenon after find out the resistance movement parts inside of valve, suit the repair the valve opening and closing flexible ringing improper adjustment ring, the valve open time is too long or return slow VI readjust should discharge tube diameter is small, emissions back pressure is bigger, makes the valve less than the discharge pipe should be changed, the decrease of the resistance of the emissions not rev pressure when you open the opening pressure is lower than the specified value; Spring adjustment screw, a screw loosening or heavy hammer to pivot string move to adjust the opening pressure to the specified value; Fixed screw, a screw and a decrease in heavy hammer spring force or produce permanent deformation change the spring after the adjustment opening pressure is close to work, equal to or lower than the relief pressure, make the safety valve action, frequent action in advance to adjust the relief valve opening pressure to the specified value after the open pressure and room temperature adjustment for high temperature, the opening pressure reducing tighten spring adjustment screw, a screw, the opening pressure to the specified value; If belong to improper selection, can exchange with the radiator of the relief valve spring opening pressure drop caused by corrosion of strong corrosive medium, should choose cladding fluorine plastic spring or choose bellows isolation valve to open pressure for action open pressure is higher than the specified value to adjust the opening pressure disc and seat is dirt stuck or seat opened by condensation or crystallization plugging relief valve purge or cleaning, the cooling condensation and crystallization temperature of the medium, to the relief valve with hot or cold season in the bottom of the relief valve connection with blasting membrane partition outdoor freeze relief valve should be insulated or mix hot Industrial Valves movement parts have jam phenomenon has increased after the opening pressure should be examined, remove jam phenomenon back pressure increases, the pressure of work to the specified value, the safety valve does not jump to eliminate back-pressure, or back pressure balance type bellows valve relief valve selection of vibration caused by the vibration of the pipeline safety valve after find out the reason, eliminate vibration valve discharge capacity is too large to choose emissions rating of the valve as close as possible to the equipment required emissions imported tube diameter is too small or too big resistance pipe diameter should not less than the relief valve size or reduce import pipe resistance discharge pipe resistance is too large, cause excessive discharge when the back pressure, drop the disc to seat and then by the medium, to produce large frequency vibration should reduce the resistance of the discharge pipe should choose smaller stiffness spring spring stiffness is too big, improper adjustment ring, the high back pressure to adjust the coil position adjustment
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