1. Do not calibrate and maintain the required period
Steam Boiler Safety Technology Supervision and Pressure Vessel Safety Technology Supervision is provided that the safety valve testing system should be implemented on a regular basis, usually at least once a year tuning and calibration, while the safety valve when the check of maintenance, to ensure that sensitive and reliable.
Once the take-off safety valve in use, the downturn will be left between the spool and the valve seat layer of water damage, time, will generate a long iron. Did not take off the safety valve sealing surface through long-term use generally will leave some debris, rust and corrosive pollution generated, so that the valve sealing performance.
From the safety valve in terms of the use of management, safety valve should be conducted annually grinding, to check the inspection and maintenance combined. Were found in the extended Unchecked remains widespread.