German Murr valves Murr models Murr prices

Murr valves are electromagnetically controlled industrial devices. They are basic automation components for fluid control, classified as 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 precision and flexibility. There are many types of solenoid valves, each serving different functions at various positions in the control system; the most common types include check valves, safety valves, directional control valves, and speed control valves.

Murr valve operating principle

The solenoid valve contains a sealed chamber with ports opened 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 in the oil 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.

Murr valve routine maintenance

1) Pay attention to the storage environment of the valve; 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 proper operation. 4) Inspect the valve sealing surface for wear and perform repairs or replacements as necessary. 5) Check the trapezoidal threads of the valve stem and stem nut for wear, and inspect the packing for expiration or failure, replacing them as needed. 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 skewed or lack pre-tightening clearance. 10) If the valve operates in a harsh environment prone to contamination by rain, snow, dust, or sand, install a protective cover on the valve stem. 11) Keep the scale on the valve complete, accurate, and clear; ensure the valve lead seal and cap are intact. 12) The insulation jacket should be free of dents and cracks. 13) Avoid striking valves in operation or using them to support heavy loads.

Murr 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 a force that lifts the closing member off the valve seat, opening the valve. When de-energized, the electromagnetic force disappears, and a spring presses the closing member against the valve seat, closing the valve. Characteristics: 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: This type combines direct-acting and pilot-operated principles. When there is no pressure difference between the inlet and outlet, energization 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, energization causes the electromagnetic force to act on the pilot small valve, increasing the pressure in the lower chamber of the main valve and decreasing the pressure in the upper chamber, 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. Characteristics: It can operate reliably at zero pressure difference, vacuum, or high pressure, 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. This creates a pressure difference (lower above, higher below) around the closing member, and the fluid pressure pushes the closing member upward, opening the valve. When de-energized, the spring force closes the pilot hole. Inlet pressure rapidly builds up in the chamber through the bypass hole, creating a pressure difference (lower below, higher above) around the closing member, and the fluid pressure pushes the closing member downward, closing the valve. Characteristics: 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 Murr valves, Murr safety valves, Murr globe valves, Murr control valves, Murr solenoid valves, Murr ball valves, Murr proportional valves, Murr diaphragm valves, Murr butterfly valves, Murr hydraulic transmission valves, Murr check valves, Murr pressure reducing valves, Murr relief valves, Murr sequence valves, Murr balance valves, Murr throttle valves, and Murr directional control valves. All products are original imports from Germany. Customers are welcome to inquire and place orders.