Basic can be said to be the pressure reducing valve, pressure regulating valve valve working principle is as follows: high pressure medium through a small hole in a relatively large cavity filling realize the decompression, is actually by intercepting the reduced pressure, both sides of the diaphragm or piston side is out of the mouth, is human to stress, and control the pore size of the stem and diaphragm (piston) are linked together, such as long as give a fixed pressure, so the oral cavity pressure is equal to the pressure, the think of the given pressure can have a spring or air or hydraulic source to provide.
According to the purpose and function, main parameters, pressure, medium working temperature, special purpose (that is, special valve), drive energy, structure and other ways to carry out the classification, the most common classification is according to the structure of the control valve is divided into nine categories, six straight stroke, three for angular stroke.
Pressure relief valve according to the characteristics of use: compact pressure relief valve, medium flow pressure relief valve, conventional high pressure relief valve, two pressure relief valve, low pressure large flow pressure relief valve.
Compact pressure reducing valve: PR series compact pressure reducing valve, single stage diaphragm pressure reducing structure, stainless steel diaphragm pressure transmission, stable output, suitable for pure gases, corrosive gases and non-corrosive gases; Characteristic: corrugated diaphragm ensures accurate pressure regulation; Metal-metal diaphragm seal; Spring loading to adjust the pressure; Inner filter screen; Optional panel installation.
Medium flow pressure reducing valve: PM series medium flow pressure reducing valve, single stage diaphragm pressure reducing structure, stainless steel diaphragm pressure transmission, stable output, mainly used in medium flow gas system;
Conventional high pressure reducing valve: PH series of conventional high pressure reducing valve is mainly used for high input pressure system, piston pressure reducing structure, stable performance, maximum pressure inlet up to 6000pSIg, outlet pressure 0~ 2500pSIg, suitable for pure gas, standard gas, corrosive gas, etc. Features, safe and reliable piston pressure induction design; Inner filter screen; Optional panel installation.
Secondary pressure reducing valve: PD series secondary pressure reducing valve, secondary diaphragm pressure reducing structure, stainless steel diaphragm pressure transmission, stable output pressure, suitable for pure gas, corrosive gas and non-corrosive gas; Features provide continuous accurate outlet pressure; Two-stage reduced pressure structure; Corrugated metal diaphragm for pressure regulating with high precision and sensitivity; Inner filter screen; Face plate installation can be used.
Low pressure and large flow pressure reducing valve: PL series low pressure and large flow pressure reducing valve, single stage diaphragm pressure reducing structure, stainless steel diaphragm pressure transmission, stable output, mainly used in low pressure and large flow gas system; The large diameter corrugated diaphragm improves the pressure sensitivity. Metal-metal diaphragm seal; High flow, minimum pressure drop; Optional panel installation. The principle of pressure regulating valve is to use the principle of the spring force and pressure balance, when the spring pressure is less than the pressure valve closed, when the pressure is greater than the spring's elastic rubber diaphragm voltage regulator at the bottom of the compressed air force of diaphragm, push the diaphragm upward arch bend left the seat and make the air into the chamber, the unloading piston under the action of air pressure, push the discharge valve from the valve seat, and by the air compressor gas filling the cavity of the air through the drain valve and vent the atmosphere air compressor idling.
