basic knowledge of automation valve actuator pressure regulator

pressure regulator ( Also called air receiver) Used to regulate or restrict to the actuator air source. A typical automatic pressure regulator valve as shown in figure 5. 49. Although many factories to provide air pressure between 60 to 80 opsi, but some actuators under the pressure operation produces internal failure. Such as 5. 3 section, one-way movement actuators are limited to the lower air pressure range ( Usually restricted to 40 pei or 2. 8bar) And need to install the pressure regulator.

using one-way movement or two-way movement of the actuator factory one of the most common problem is that some technical staff are used to in all automation valves ( No matter how something door type) Install the pressure regulator, limiting the to all of the actuator pressure. However some actuators, such as the enclosed Qian cylinder actuators, better operation under high pressure, and provide greater thrust, fast travel speed and better ability to resist deviation, etc. In addition, the executing agency shall set up Lan pressure regulator will lead to the possibility of error adjustment or increase a possible failure of facilities. Manufacturers usually carry labels on actuator, is used to inform the user of the actuator pressure limit. As usual, pressure regulator can only be installed in the low pressure on the operation of the actuator.

when an electrical signal must be sent to indicate or opening and closing of the Industrial Valves or actuator stroke center, an electric switch is adopted at facilities called limit switch one by one. Limit switches are normally used for voice alarm or operating lights, small d electrical or electromagnetic Industrial Valves. A typical signal - - open and signals Closed limit switch structure as shown in figure 5. 50. And CAM limit switch, limit switch installed directly on the actuator or rotating transfer, and use the activated by locking plate or similar institutions and broken arm moving stem or shaft connection. Limit switches there are two types: single pole double throw type, it can make a signal to the - After grazing; Bipolar type double throw, it can make the two signals for receiver. CAM limit switch using a widget to operate any place between two and six switches, dc or ac all can use.

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