Self operated pressure regulating valve

1 ZZYP-16C DN150Self operated pressure regulating valveProduct Description: This utility model has a novel structure, versatile combinations, clever design, unified and coordinated appearance, easy operation, small space occupation, balanced motion, good rigidity, compact connection between valves, wide selection range, high sensitivity, and good adjustability. The nominal diameter of the inlet and outlet of the valve group can be different, that is, one inlet diameter can be equipped with several nominal diameters of outlets, with good applicability, wide range of use, and long service life. Simultaneously possessing the characteristics of corrosion resistance, oxygen resistance, and flame retardancy, it has the advantages of safety, reliability, high efficiency, and energy saving. It is not installed alone on the pipeline, but is installed in conjunction with other valves or pipelines in the system. There are usually two types of pressure reduction: single channel pressure reduction and dual channel pressure reduction. Users can order according to their needsManual ball valve in front of pressure reducing valve for various gases and low viscosity liquids, pressure gauge filter in front of valve (media confirmed to be free of particles can be omitted), self operated pressure reducing valve, pressure gauge after valve, automatic ball valve bypass ball valve. Note: As needed, check valves and safety valve bypass pipes can also be installed after the valve group. They can be arranged on the same horizontal plane as the self operated valve or on the same side according to the site spaceIt is characterized in that at least one is installed in the middle of the main pipeline, each connected to the flow regulating valve through a flame retardant pipe behind the valve. Globe valves or ball valves are installed on both sides of the flow regulating valve, and pressure gauges are installed on the side of the globe valve or ball valve. A filter is installed at the head of the main pipeline, and a flow orifice plate, safety valve, and check valve group are installed at the tail of the main pipeline. The main pipeline is connected to a branch pipeline composed of globe valves or ball valves, flow regulating valves, flame retardant pipes behind the valve, and self operated pressure regulating valves. The end of the branch pipeline is connected to the pressure gauge of the main pipeline. In a regulating system composed of multiple regulating valves, there are types such as selective regulating system, split range regulating system, and linkage regulating system. The selection of the regulating system is based on production needs, selecting one of the multiple regulating valves to be controlled by a regulator; The split range regulation system considers two or more regulating valves as one, and controls the regulation of two regulating valves in sections by the output of one regulator; The linkage regulation system considers two or more regulating valves as a whole, with one regulator controlling two or more regulating valves simultaneously throughout the entire output range, rather than segmented regulation. The high flow characteristics of several simultaneously operated regulating valves are significantly different from those of a single regulating valve. Mode 1 of regulation: Selection of regulating valve group: with bypass or without bypass Reduce the leakage of hazardous media. 2. Difficult to rinse slurry. 3. Usually used for regulating valve groups with DN ≥ 80. 4. Intermittent operation of regulating valve group 2. Selection of regulating valve position. The regulating valve positions include gas open (FC), gas closed (FO), and hold type (FL). Gas Open (FC): When the instrument air supply is interrupted, the valve closes. FO: When the instrument air supply is interrupted, the valve opens. Retaining type (FL): When the instrument air supply is interrupted, the valve is in the position immediately before the air supply interruption. 3. The selection of cut-off valves in the regulating valve group should be good sealing, low resistance, and easy to open and close valves, such as gate valves, plunger valves, ball valves, butterfly valves, etc. 4. The selection of bypass valves in the regulating valve group should include globe valves, gate valves, plunger valves, or high sealing butterfly valves with regulating functions. When the DN of the cut-off valve is ≤ 50, choose a globe valve or throttle valve with the same size as the cut-off valve. When the cut-off valve DN=80, choose a cut-off valve with the same size as the cut-off valve. When the DN of the cut-off valve is ≥ 80, choose a gate valve, plunger valve, or high sealing butterfly valve that is one size smaller than the cut-off valve. 5. The selection of the purge valve in the regulating valve group is located upstream of the regulating valve and downstream of the shut-off valve. Generally, a DN=20 gate valve or ball valve is selected. Abstract: This relates to a pressure regulating valve group that can automatically perform pressure reduction and stabilization functions in the process of controlling gas media. Solved the problems of low safety factor, loose structure, and uneven quality that existed in previous valve groups; At least one is installed in the middle of the main pipeline, each connected to the flow regulating valve through a flame retardant pipe behind the valve. Stop valves or ball valves are installed on both sides of the flow regulating valve, and pressure gauges are installed on the side of the stop valves or ball valves. Filters are installed at the head of the main pipeline, and flow orifice plates, safety valves, and check valves are installed at the tail of the main pipeline. This utility model has a compact structure, versatile combinations, agile design, convenient operation, and high safety factor; This valve group occupies small space, has balanced motion, good rigidity, compact connection between valves, wide selection range, and high sensitivity.

二、 ZZYP-16C DN150Self operated pressure regulating valveDuring installation, pay attention to the following points: (1) The condenser must be higher than the actuator of the pressure regulating valve and lower than the connecting pipe behind the valve (the base note valve) or in front of the valve (the top note valve) to fill the condenser with condensate. (2) The pressure tapping point shall be at a proper position away from the pressure regulating valve. The top note valve shall be more than 2 times the pipe diameter, and the base note pressure regulating valve shall be more than 6 times the pipe diameter. (3) For the convenience of on-site maintenance and operation, there should be appropriate space around the pressure regulating valve, and stop valves and bypass manual valves should be installed before and after the valve, as shown in Figure 5. Installation plan for pressure regulating valve group: The dashed line in the figure represents another allowable direction for pipeline inlet and outlet (4). If the diameter of the pressure regulating valve is too large (DN ≥ 100), a fixed bracket should be provided. (5) The direction of medium flow should be consistent with the arrow on the valve body, and the center of the front and rear pipelines should be aligned with the center of the two flanges of the pressure regulating valve to avoid excessive stress on the valve body. (6) A filter should be installed in front of the valve to prevent impurities from clogging the medium. (7) The regulating valve should be installed in environments where the ambient temperature does not exceed -25 ℃~55 ℃. 2. The operating procedure for using gas or low viscosity liquid at room temperature: (1) Slowly open the front and rear shut-off valves of the valve. (2) Loosen the exhaust plug until gas or liquid overflows from the actuator. (3) Then tighten the exhaust plug again, and the pressure regulating valve can work. The required pressure value can be obtained by adjusting the pressure regulating disc. When adjusting, pay attention to the pressure indication value, and the action should be slow, without causing the valve stem to rotate along with it. The operating procedure when using steam: (see Figure 4) (1) Unscrew the drain screw from the condenser. (2) Twist the exhaust plug of the actuator. (3) Use a leak head to add water through the injection port until the exhaust hole flows out (4). Tighten the exhaust plug and continue adding water until it overflows the injection port. (5) Tighten the injection port screw. (6) Slowly open the front and rear shut-off valves of the pressure regulating valve. (7) Adjust the pressure regulating disc and observe the pressure reading until it reaches the required level. 3. After the maintenance control valve is put into operation, the maintenance workload is generally very small. Usually, it is only necessary to observe whether the pressure readings before and after the valve meet the required process values. In addition, observe whether there is leakage in the stuffing box and actuator. If there is leakage, tighten or replace the stuffing box and diaphragm. Ordering instructions: 1. Product name and model, 2. Caliber, 3. Whether accessories are included for us to correctly select for you, 4. Operating pressure, 5. Temperature of the medium used. 2、 If the company's model has already been selected by the design unit, please order directly from our sales department according to the model. 3、 When the usage situation is very important or the environment is complex, please provide design drawings and detailed parameters as much as possible, and our valve company experts will review and control them for you. If you have any questions: Please: We will do our best to provide you with high-quality service. We provide comprehensive and professional "valve system solutions" and are also willing to help users solve problems encountered in production.