German affco valves affco models affco prices

affco 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 media direction, flow rate, speed, and other parameters. Solenoid valves can be combined with different circuits to achieve desired control, ensuring precision and flexibility. There are many types of solenoid valves, each serving different functions within a control system; the most common include check valves, safety valves, directional control valves, and speed control valves.

affco valve operating principle

The solenoid valve contains a sealed chamber with ports at various positions, each connected to different oil lines. A piston is located in the center of the chamber, with electromagnets on both sides. When the coil on one side 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. The oil inlet port remains normally open, allowing hydraulic oil to enter different discharge lines. The oil pressure then pushes the piston in the hydraulic cylinder, which drives the piston rod, and the piston rod actuates the mechanical device. Thus, mechanical motion is controlled by switching the current to the electromagnets on and off.

affco 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 debris, and coated with anti-rust oil on their surfaces. 3) Valves that have been installed and applied should undergo regular maintenance to ensure proper operation. 4) Inspect the valve sealing surface for wear and repair or replace it as necessary. 5) Check the trapezoidal threads of the valve stem and stem nut for wear, and check if the packing is outdated or failed, replacing them as necessary. 6) Test the sealing performance of the valve to ensure its integrity. 7) Valves in operation should be in good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 lost, 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) Scales on the valve should remain complete, accurate, and clear; check the valve lead seals and caps. 12) Insulation jackets should be free of dents and cracks. 13) Avoid striking valves in operation or using them to support heavy loads.

affco valve classification

Solenoid valves are divided into three main categories based on their operating principle: 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: 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 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, 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. The resulting pressure difference pushes the main valve upward. When de-energized, the pilot valve uses spring force or media pressure to push the closing member downward, closing the valve. Characteristics: Can operate reliably at zero pressure difference, under vacuum, or at high pressure, but requires higher power and must be installed horizontally. 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 fluid pressure pushes the closing member upward, opening the valve. When de-energized, the spring force closes the pilot hole. Inlet pressure rapidly enters the upper chamber through the bypass hole, creating a pressure difference (lower below, higher above) around the closing member, and fluid pressure pushes the closing member downward, closing the valve. Characteristics: Has a higher upper limit for fluid pressure range and can be installed in any orientation (customization required), but must meet fluid pressure difference conditions.

Weidou Intelligent Technology specializes in selling German affco valves, affco safety valves, affco globe valves, affco control valves, affco solenoid valves, affco ball valves, affco proportional valves, affco diaphragm valves, affco butterfly valves, affco hydraulic transmission valves, affco check valves, affco pressure reducing valves, affco relief valves, affco sequence valves, affco balance valves, affco throttle valves, and affco directional control valves. Original German imports. Welcome inquiries and orders from customers.