APR2000 Pilot diaphragm steam pressure reducing valve

The valve is a pilot diaphragm pressure reducing valve; With high Cv value, it can also give full play to its excellent performance under the conditions of high inlet pressure and large steam load.  

The steam pressure reducing valve regulates the flow of the medium by controlling the opening of the opening and closing parts in the valve body, thus reducing the pressure of the medium. At the same time, the opening of the opening and closing parts is adjusted by the pressure behind the valve to keep the pressure behind the valve at a certain level. In this range, when the inlet pressure changes continuously, keep the outlet pressure within the set range to protect the subsequent domestic and production appliances. The steam pressure reducing valve is generally installed horizontally and controlled by the pressure behind the valve. When the pressure sensor detects that the valve pressure indicator increases, the valve opening of the pressure reducing valve decreases; When the pressure of the pressure reducing valve is detected, the valve opening of the pressure reducing valve increases to meet the control requirements.

The pressure reducing ratio of steam pressure reducing valve is higher than the system value; It should be able to respond to positive or negative control signals even under large or small flow. These valves should be selected according to the useful control range, i.e. 20% to 80% of the large flow. Generally, it is equal or has equal ratio. These types of valves have the flow characteristics and flow range required for proportional control.

Classification of steam pressure reducing valve：

According to the structure, it can be divided into diaphragm type, spring diaphragm type, piston type, lever type and bellows type; According to the number of seats, single seat and double seat can be manually operated; According to the position of the valve disc, it can be divided into positive action type and reaction type. There are many types of pressure reducing valves, including pilot piston pressure reducing valve, membrane pressure reducing valve, bellows pressure reducing valve, proportional pressure reducing valve, self-operated pressure reducing valve, direct-acting piston pressure reducing valve, back pressure regulating valve, etc. They are suitable for different working media.

Function of steam pressure reducing valve：

The pressure reducing valve is an intelligent valve that uses the energy of the medium to regulate and control the pressure of the pipeline. It is used for industrial water supply systems such as domestic water supply and fire water supply. The outlet pressure of the main valve can be adjusted by the pressure reducing pilot valve of the regulating valve. The outlet pressure does not change due to the change of inlet pressure and inlet flow. The outlet pressure can be safely and reliably maintained at the set value, and the set value can be adjusted as required to achieve the purpose of reducing pressure. The valve has accurate pressure reduction, stable performance, safety and reliability, convenient installation and adjustment, and long service life.

The pressure reducing valve mainly controls the fixed outlet pressure of the main valve. The outlet pressure of the main valve does not change with the change of the inlet pressure, and the outlet pressure does not change with the change of the outlet flow of the main valve. It has the function of improving system operation conditions and potential water saving. According to statistics, its water-saving effect is about 30%. It is applicable to industrial water supply, fire water supply and domestic water pipe network system. It is widely used in high-rise buildings, areas where the water pressure of urban water supply network is too high, mines and other occasions to ensure that the water intake points in the water supply system can obtain appropriate domestic water pressure and flow.

■ Characteristic

● The maximum pressure reduction ratio is 20:1, which can be reduced by one time without the cost of two times

● The use of large size diaphragm increases the pressure area of the main valve body, with large flow and significant controllability

● The spherical main valve has good sealing performance, greatly reducing valve seat leakage

● The main moving parts are made of solid stainless steel, with simple structure and convenient maintenance and inspection