ASCO solenoid valve SCG531B001MS available now.

Brand

ASCO/USA

Flow Direction

Other

3C Valve Category

Industrial

Application Areas

Chemical, Petroleum, Energy, Electrical, General

ASCO solenoid valves are electromagnetically controlled industrial devices, fundamental components of automation used to control fluids. They are actuators, not limited to hydraulic or pneumatic systems. Used in industrial control systems to adjust the direction, flow rate, speed, and other parameters of the medium. Solenoid valves can be used with different circuits to achieve the desired control, ensuring both precision and flexibility. There are many types of solenoid valves. Different solenoid valves play different roles in different parts of the control system. Commonly used ones include check valves, safety valves, directional control valves, and speed control valves.

ASCO Solenoid Valve Working Principle

An ASCO solenoid valve has a sealed chamber with through holes at different positions. Each hole connects to a different oil pipe. In the middle of the chamber is a piston, and on either side are two electromagnets. When the coil of one electromagnet is energized, the valve body is attracted to that side. By controlling the movement of the valve body, different drain holes are opened or closed. The inlet hole is always open, allowing hydraulic oil to enter different drain pipes. The oil pressure then pushes the piston in the cylinder, which in turn drives the piston rod, which in turn drives the mechanical device. Thus, the mechanical movement is controlled by controlling the current to the electromagnets.

Main Classifications of ASCO Solenoid Valves

Three main categories

(1) Direct-acting solenoid valve:

ASCO solenoid valve principle: When energized, the electromagnetic coil generates electromagnetic force to lift the closing element from the valve seat, opening the valve; when de-energized, the electromagnetic force disappears, and the spring presses the closing element onto the valve seat, closing the valve. ASCO solenoid valve characteristics: It can operate normally under vacuum, negative pressure, and zero pressure, but the nominal diameter is generally no more than 25mm.

(2) Step-by-step direct-acting solenoid valve:

ASCO solenoid valve principle: It is a combination of direct-acting and pilot-operated principles. When there is no pressure difference between the inlet and outlet, after energization, the electromagnetic force directly lifts the pilot valve and the main valve closing element sequentially upwards, opening the valve. When the inlet and outlet reach the starting pressure difference, after energization, the electromagnetic force pilots the small valve, the pressure in the lower chamber of the main valve rises, and the pressure in the upper chamber drops, thus using the pressure difference to push the main valve upwards; when de-energized, the pilot valve uses spring force or medium pressure to push the closing element downwards, closing the valve.

ASCO solenoid valve characteristics: It can reliably operate under zero pressure difference, vacuum, or high pressure, but the power is relatively large, requiring horizontal installation. (3) Pilot-operated solenoid valve:

ASCO solenoid valve principle: When energized, electromagnetic force opens the pilot orifice, causing a rapid drop in pressure in the upper chamber. This creates a pressure differential around the closing element, with the pressure lower at the top and higher at the bottom. The fluid pressure pushes the closing element upward, opening the valve. When de-energized, spring force closes the pilot orifice. The inlet pressure quickly passes through the bypass orifice, creating a pressure differential around the closing element, with the pressure lower at the bottom and higher at the top. The fluid pressure pushes the closing element downward, closing the valve.

ASCO solenoid valve characteristics: High upper limit of fluid pressure range; can be installed arbitrarily (customization required), but must meet fluid pressure differential conditions.

2. Based on differences in valve structure, materials, and operating principles, solenoid valves are divided into six subcategories: direct-acting diaphragm structure, step-by-step direct-acting diaphragm structure, pilot-operated diaphragm structure, direct-acting piston structure, step-by-step direct-acting piston structure, and pilot-operated piston structure. 3. Solenoid valves can be classified by function: water solenoid valves, steam solenoid valves, refrigeration solenoid valves, cryogenic solenoid valves, gas solenoid valves, fire-fighting solenoid valves, ammonia solenoid valves, gas solenoid valves, liquid solenoid valves, miniature solenoid valves, pulse solenoid valves, hydraulic solenoid valves, normally open solenoid valves, oil solenoid valves, DC solenoid valves, high-pressure solenoid valves, explosion-proof solenoid valves, etc.

2. Solenoid valves can be divided into three main categories based on material:

1) Stainless steel solenoid valves: These are the most common type of solenoid valve. Stainless steel is popular due to its high quality and stable operation.

ASCO solenoid valves are widely used in textiles, printing, chemicals, plastics, rubber, pharmaceuticals, food, building materials, machinery, electrical appliances, surface treatment, and other production and research departments, as well as in everyday facilities such as bathrooms, canteens, and air conditioning systems.

2) Brass solenoid valves: Some users with less demanding requirements may choose brass solenoid valves. These valves are relatively inexpensive and suitable for ordinary working environments.

ASCO solenoid valves are generally suitable for media such as liquids, water, gas, hot water, oil, and methane.

3) Plastic Solenoid Valves: In some special workplaces and with special media, such as acidic or alkaline environments, brass and stainless steel solenoid valves are easily corroded. Therefore, plastic solenoid valves made of special materials (engineering plastics PVC, CPVC, UPVC, ABS, or PTFE, etc.) have particularly excellent corrosion resistance.

ASCO solenoid valves are suitable for drinking water, various untreated sewage, rainwater, seawater, and various acid, alkali, and salt solutions, organic solvents, etc.

2. Solenoid valves can be divided into on/off solenoid valves and proportional solenoid valves according to their function.

1) On/off solenoid valves: These valves function as switches; when current flows, the solenoid valve controls the opening and closing of the circuit or oil circuit.

2) Proportional solenoid valves: The output pressure varies depending on the input current. Changing the input current changes the output pressure of the solenoid valve; they are mostly used in hydraulic systems.

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The company mainly deals with European and American brands and can source brands from any European country. For example, our key German brands include: BURKERT, DEMAG, HAWE, REXROTH, HYDAC, PILZ relays, FESTO, IFM sensors, E+H, HEIDENHAIN, P+F sensors, SICK, TURCK, and HIRSCHMANN industrial switches. German brands: Hengstler, Murr, Schmersal, Samson, EPRO (Emerson Group)

American brands: MOOG, ASCO, MAC, NUMATICS, PARKER, Vickers, Helón (Norgren)

Italian brands: OMAL, ATOS, CAMOZZI, UNIVER, Camozzi