Pressure regulating equipment
(a) the set pressure, followed by high to low principle, according to the steps of a a, namely: cut pressure - releasing pressure, work pressure.
(two) after setting the pressure, it is necessary to test its closing pressure, verify its performance, whether to meet the requirements.
(three) the pressure is set to meet the requirements of the rear can open the valve, before this can not open the export valve, to prevent accidents.
(four) precision instruments shall be protected in order to prevent pressure fluctuations and damage to the instrument.
(five) in the 1 1 adjustment equipment debugging, if need not interrupted gas supply, should first pass through the bypass manual control pressure, pressure control valve, a handheld pressure gauge, time to observe the pressure change, so that the pressure to maintain the required pressure range, the pressure is set to complete, the slow opening regulator outlet valve, after adjusting the pressure of 24, and then close the bypass valve.
(VI) if adjusting transformer which adopts a 2 a 0 opened and closed type, and the two are required to debug, opening a road, off a road (alternate), alternate road should import and export valve pressure relief to, to avoid pressure regulating device membrane and the spring is compressed, resulting in fatigue.
(VII) if adjusting the voltage regulator mouth with two automatic switching supply, according to the main and auxiliary road set pressure parameters. Then two import and export valve kept open state, automatic switching surge performance requirements are higher, general stabilization precision is less than or equal to 2.5%, close precision is less than or equal to 10. Test automatic switching: the main road pressure to improve (simulation fault), so that the main road pressure and high and cut off valve action, cut off the main road gas, stop gas supply, observe whether the side road can be set up to start the gas supply. After passing inspection, and the main road cut off valve reset, the main road adjustable pressure regulator pressure transferred back to the original settings, such a main and an auxiliary regulating pressure for pressure set, based on gas supply of the main road, side road reserve, at the time of the failure of a main road, road Deputy adjustable voltage regulator self started to realize the uninterrupted continuous gas supply, this kind of mode is often used in key public welfare, industry and Commerce producing gas.
(eight) a series of monitoring and adjusting voltage regulators are used in series to monitor and control the type of the monitoring and control of the regulator. 1 to check whether the pressure signal is correct, if the pressure signal tube is connected to the working pressure regulator, the correct connection. 2 the two voltage regulator of the pressure spring are pressed to the most tight pre regulator (monitor regulator) of the pressure spring to cut off the pressure to cut off the pressure, commissioning and cut off valve. 3 adjustment valve. 4 before the release of the pre release regulator (monitor regulator) of the pressure spring, so that the middle pressure to the outlet pressure set value 10%. 5 after the release of the pressure regulator (working pressure regulator), the pressure spring, so that the pressure to the rear of the export pressure set value (at this time the middle pressure will rise to equal to the pressure of imports). Note: this test should be carried out under the condition of the large flow of exports.
(nine) after the commissioning of the regulator, the use of a foam agent to check the place of the interface and the loose in the process of debugging. There is no gas leak.
Safety measures
(a) the equipment housing or the surface of the box body is sprayed with warning signs such as the prohibition of fireworks, the prohibition of the collision and the number of the equipment, or the suspension warning signs.
(two) check and measure whether the electrostatic device meets the requirements of the parameters, and whether the device is functioning properly at all levels.
(three) during the commissioning process, no fireworks are forbidden to prevent the generation of static electricity, and to prohibit the collision, knock on the pipe and equipment;
(four) the valve should be opened slowly, and the valve is not allowed to open the hard drive.
(five) the regular inspection and maintenance of the emergency cut off valve shall be tested, checked and maintained at least once a week on the cut off valve.