pilot piston gas regulator YK43X/F/Y-10/16/25/64

Yk43X/F series piston pressure reducing valve is suitable for pipelines with working temperature ≤ 80/150 ℃ for air, coal gas, liquefied gas, ammonia, oxygen, etc. This valve reduces the inlet pressure to a certain required outlet pressure through throttling of the opening and closing components, and uses the energy of the medium itself to automatically meet the predetermined requirements and adapt to the working conditions. The difference between the inlet pressure and outlet pressure of this valve must be ≥ 0.15MPa.

1. This valve consists of two main parts: a main valve and a pilot valve. The lower part of the main valve body has a lower cover, a main valve spring, and a main valve disc. The main valve disc is supported by the main valve spring to keep the main valve in a sealed state. The upper part of the main valve body has pistons, cylinder liners, etc. When the piston is subjected to medium pressure, it is guided by the cylinder liner to push the main valve disc, causing the valve to open; The valve body contains a valve spring, valve disc, diaphragm, etc. The valve spring supports the valve disc, keeping the valve in a sealed state; There are adjusting springs and bolts inside the cover of the pilot valve, which facilitate the adjustment of the required working pressure.

2. When this valve leaves the factory, the main valve and pilot valve are closed. When in use, rotate the adjusting bolt clockwise to open the pilot valve disc. The medium enters the pilot valve chamber through channel "a" and then enters channel "S". The piston is pushed by the medium pressure to open the main valve disc. The medium flows behind the valve and enters the diaphragm lower chamber through channel "B". When the pressure behind the valve exceeds the set pressure, the diaphragm is pushed to compress the regulating spring, and the pilot valve gradually closes. The medium flowing into the upper part of the piston decreases, and the piston rises, causing the main valve disc to gradually close under the action of the main valve spring. There is less medium flowing from chamber A to chamber B, and the pressure behind the valve decreases. The small change in pressure behind the valve affects the balance between the diaphragm and the regulating spring, causing the diaphragm to move up and down, pushing the pilot valve and piston to work, causing the main valve to move up and down to control the flow of medium. Therefore, the pressure behind the valve remains stable.