Basic technical requirements of the pump valve: 1) Setting pressure is greater than 3. 0 mpa steam safety Industrial Valves or medium temperature greater than 235 ° C with safety Industrial Valves, air or other gas should be able to prevent discharge medium erosion spring directly. 2) Gear pump steam safety valve must contain wrench, when medium pressure setting pressure of 75% above, can use spanner to disc, the action of the wrench on the valve should not get in the way. 3) To toxic or flammable medium with relief valve closed the relief Industrial Valves must be used, and to prevent the cover and shielding gasket leaking. 4) In order to prevent the adjusting spring organization is loose, the amount of compression and changed has good pressure, must be a locking device and seal. 5) Gear pump seat should be fixed in the body, not loose, the rev. Safety valve should set limits on the height of the organization. 6) Gear pump valve even if the damage, should be able to achieve the rated capacity, when damage to the spring, disc, etc. Parts can't fly out of the body. 7) To have additional back pressure relief valve, shall, according to the change of the size of the pressure and set back pressure balancing mechanism. 8) Gear pump to the pilot operated relief valve shall be respectively to the pilot valve and main valve for sealing and open action test, should meet the requirements of the performance of the prescribed standards.
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