German STASTO valves STASTO models STASTO prices

STASTO 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.

STASTO 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 discharge ports are opened or closed. The inlet port remains normally open, allowing hydraulic oil to enter different discharge lines. The oil pressure then drives the cylinder piston, which moves the piston rod, thereby actuating the mechanical device. Thus, mechanical motion is controlled by switching the current to the electromagnets on and off.

STASTO valve routine maintenance

1) Pay attention to the valve storage environment; store in a dry, ventilated indoor area and block both ends of the flow path. 2) Valves should be inspected regularly; remove dirt and apply anti-rust oil to the surface. 3) Valves that have been installed and put into service should undergo regular maintenance to ensure proper operation. 4) Inspect the valve sealing surfaces for wear and repair or replace them as necessary. 5) Check the trapezoidal threads of the valve stem and stem nut for wear, and check if the packing is outdated or failed; replace as necessary. 6) Test the sealing performance of the valve to ensure its integrity. 7) Valves in operation must be in good condition, with all bolts on flanges and supports present, threads undamaged, and no looseness. 8) If the handwheel is lost, replace it promptly; do not substitute with an adjustable wrench. 9) The packing gland must not be skewed and must have the specified 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 valve lead seals and caps are intact. 12) The insulation jacket must be free of dents and cracks. 13) Avoid striking valves in operation or using them to support heavy loads.

STASTO 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 element off the valve seat, opening the valve. When de-energized, the electromagnetic force disappears, and a spring presses the closing element against the valve seat, closing the valve. Features: Operates correctly 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 element 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; the pressure in the lower chamber of the main valve rises while the pressure in the upper chamber drops, using the pressure difference to push the main valve open. When de-energized, the pilot valve uses spring force or media pressure to push the closing element downward, closing the valve. Features: Operates reliably at zero pressure difference, under vacuum, or at high pressure, but 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 element, and fluid pressure pushes the closing element 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 (higher above, lower below) around the closing element, and fluid pressure pushes the closing element downward, closing the valve. Features: Suitable for higher upper limits of fluid pressure range; can be installed in any orientation (customization required) but must meet fluid pressure difference conditions.

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