Brake pneumatic valve testing steps

brake pneumatic valve is also called the pneumatic brake pneumatic valve, pneumatic valve or smoke damper brake pneumatic valve is to prevent the backflow medium pipeline. Pump suction off hand of pneumatic valve also belong to brake valve class. Open-close part by medium flow and power to open or closed, to prevent the backflow medium pneumatic valve is called brake pneumatic valve. As part of the automatic pneumatic valve, a one-way flow of pipeline is mainly used for medium, only allowed to medium flows in one direction, in order to prevent accidents. Brake pneumatic valve's role is only allowed to medium flows in one direction, the direction and stop the flow. This pneumatic valve is normally automatic work, in a direction of flow of fluid pressure, pneumatic valve open; In the opposite direction of fluid flow, the fluid pressure and pneumatic disc from the overlap of pneumatic disc on the pneumatic seat, thereby cutting off flow.
with pneumatic valve is brake belong to this type of pneumatic valve, pneumatic suction gate valve including pneumatic swing gate valve and pneumatic valve lift gate.
brake pneumatic valve in a large number of work at the same time, its product quality is very important. To keep the normal operation of pneumatic valve gate is the work of the guarantee, if you can in your spare time through a variety of testing methods of the pneumatic valve for quality inspection, in order to achieve the purpose of safety work. Then the brake pneumatic valve is how to test?
we usually put the most simple method to measure the brake of the pneumatic valve is divided into three steps:
pathways play opened a, pneumatic valve, water ( Or kerosene) Full of pneumatic valve cavity, pressure and pressure to the strength test requirements, check the pneumatic valve, pneumatic valve cap, gasket, packing with and without leakage.
2, shut up smoke damper pneumatic valve, pneumatic valve at the side of the pneumatic valve brake pressure to the nominal pressure, on the other side to check with and without leakage.
3, the brake pneumatic valve upside down, test the opposite side. Through the above three simple steps can be analyzed from basic working state of the pneumatic valve is abnormal.
of course, more complicated inspection method, the following points out that the method is in view of the potential problems more complex, the basic steps can be divided into two steps:
pneumatic valve, brake test pressure from nominal pressure. Mpa - Mpa, the commonly used pressure pneumatic valve, pneumatic valve strength test pressure for the nominal pressure. Times. Pneumatic valve seal test pressure, equal to the nominal pressure. Times.
, brake pneumatic valve test bench is usually a pressure parts above, the following have a pipe connected with hydraulic test pump. The pneumatic valve after compaction, hydraulic test pump work, from the hydraulic test pump pressure gauge, can read Numbers of pneumatic valve under pressure. Brake pressure water filling, pneumatic valve, air in the pneumatic valve line net. Testing the upper pressure plate, a vent, with a small pneumatic valves open and close. Air net logo is, vent out all of them are in the water. After close the vent, began to step up. Booster process slowly, not sharp. After reaching specified pressure, keep minutes, pressure is not qualified.