German PMV valve PMV model PMV price

PMV valves are electromagnetically controlled industrial devices. They are basic automation components for fluid control, belonging to the category of actuators, and are not limited to hydraulic or pneumatic applications. They are used in industrial control systems to adjust the direction, flow rate, speed, and other parameters of the medium. Solenoid valves can be combined with different circuits to achieve desired control, ensuring both control precision and flexibility. There are many types of solenoid valves, each playing a role at different positions in the control system; the most common types include check valves, safety valves, directional control valves, and speed control valves.

PMV valve operating principle

The solenoid valve contains a sealed chamber with through-holes at different positions, each connected to different oil pipes. A piston is located in the center of the chamber, with two electromagnets on either side. When the coil of one magnet is energized, the valve body is attracted to that side. By controlling the movement of the valve body, different oil discharge ports are opened or closed, while the oil inlet port remains normally open. Hydraulic oil enters different discharge pipes, and the oil pressure pushes the piston of the hydraulic cylinder. The piston then drives the piston rod, which in turn drives the mechanical device. Thus, mechanical motion is controlled by switching the current to the electromagnets on and off.

PMV valve routine maintenance

1) Pay attention to the valve storage environment; it should be stored in a dry, ventilated indoor area, with both ends of the flow path blocked. 2) Valves should be inspected regularly, cleaned of dirt, and coated with anti-rust oil on their surfaces. 3) Valves that have been installed and put into service should undergo regular maintenance to ensure normal operation. 4) Inspect the valve sealing surface for wear and perform repairs or replacements as necessary. 5) Check the wear condition of the trapezoidal threads on the valve stem and stem nut, and whether the packing is outdated or failed, and perform necessary replacements. 6) Test the sealing performance of the valve to ensure its integrity. 7) Valves in operation should be in good condition, with all bolts on flanges and supports present, threads undamaged, and no looseness. 8) If the handwheel is missing, it should be replaced promptly; do not use an adjustable wrench as a substitute. 9) The packing gland must not be tilted or lack pre-tightening clearance. 10) If the valve operates in a harsh environment prone to contamination by rain, snow, dust, sand, etc., a protective cover should be installed on the valve stem. 11) The scale on the valve should remain complete, accurate, and clear; check the valve lead seal and cap. 12) The insulation jacket should have no dents or cracks. 13) Avoid striking valves in operation or using them to support heavy loads.

PMV valve classification

Solenoid valves are divided into three main categories based on their operating principles: 1) Direct-acting solenoid valve. Principle: When energized, the electromagnetic coil generates an electromagnetic force that lifts the closing member off the valve seat, opening the valve; when de-energized, the electromagnetic force disappears, and the spring presses the closing member against the valve seat, closing the valve. Features: It can operate normally under vacuum, negative pressure, and zero pressure conditions, but the nominal diameter generally does not exceed 25mm. 2) Step-by-step direct-acting solenoid valve. Principle: It combines direct-acting and pilot-operated principles. When there is no pressure difference between the inlet and outlet, energizing the valve causes the electromagnetic force to lift the pilot small valve and the main valve closing member sequentially, opening the valve. When the pressure difference between the inlet and outlet reaches the starting differential pressure, energizing the valve activates the pilot small valve, causing the pressure in the lower chamber of the main valve to rise and the pressure in the upper chamber to drop, thereby using the pressure difference to push the main valve open; when de-energized, the pilot valve uses spring force or medium pressure to push the closing member downward, closing the valve. Features: It can operate reliably under zero pressure difference, vacuum, or high pressure conditions, but it has higher power consumption and requires horizontal installation. 3) Pilot-operated solenoid valve. Principle: When energized, the electromagnetic force opens the pilot hole, causing the pressure in the upper chamber to drop rapidly, forming a pressure difference (lower above, higher below) around the closing member. Fluid pressure pushes the closing member upward, opening the valve; when de-energized, the spring force closes the pilot hole, and the inlet pressure rapidly builds up in the chamber through the bypass hole, forming a pressure difference (higher above, lower below) around the closing member. Fluid pressure pushes the closing member downward, closing the valve. Features: It has a higher upper limit for fluid pressure range and can be installed in any orientation (customization required), but the fluid pressure difference conditions must be met.

Weidou Intelligent Technology specializes in selling German PMV valves, PMV safety valves, PMV globe valves, PMV control valves, PMV solenoid valves, PMV ball valves, PMV proportional valves, PMV diaphragm valves, PMV butterfly valves, PMV hydraulic transmission valves, PMV check valves, PMV pressure reducing valves, PMV relief valves, PMV sequence valves, PMV balance valves, PMV throttle valves, and PMV directional control valves. All products are original imports from Germany. Customers are welcome to inquire and place orders.