Safety valve basic system and operation method:
1. Is to check the safety valve 2. Pressure gauge 3. Check valve 4. Pressure relief valve
Safety valve testing for closed pressure relief valve "4", gradually open the check valve "3" make the medium pressure is connected to check the safety valve, pressure gauge "2" pressure gradually increased, to safety valves open, indicating the maximum pressure value is opening pressure or the pressure setting, if higher than the predetermined value, unscrew the spring, such as too low, tighten the spring, value until the meet the requirements.
Additional function:
The actual use of the check valve in Taiwan based on an increase of some of the additional components, including: multi file pressure gauge switch. Only in this way can according to different pressure safety valve selection pressure gauge, lest often split for pressure gauge; through adding pressure sensor in the pipeline, so that the pressure value into electrical signals, with numbers reflect the pressure value, more intuitive; or access recorder and record opening pressure for future reference.
In order to save energy and improve the work efficiency, through the automatic clamping chuck fixed and remove the safety valve, automatic clamping chuck are manual, pneumatic, hydraulic, and so on. In order to prevent impurities in the media in the check damage to the safety valve sealing surface, in the check valve before access to filters, etc.. Some calibration table without the pressure medium source, because of the check valve with different medium and different pressure ranges, by the user according to the needs of self with or connected to the existing pressure source. For example: compressed air cylinders or pressure nitrogen cylinder, or buy with the corresponding pressure of the compressor. Some users have pressure source pipe, you can directly access. In order to stabilize the pressure, usually in front of the system, the gas storage pressure vessel is connected in parallel. Some calibration units have been equipped with electric or pneumatic compressor, its own source of pressure. Some equipped with manual pressure pump to carry out water medium check. Figure 4.3 and Figure 4.2 for common safety valve test bench.
