Working principle of German REXROTH solenoid directional valve

Brand

REXROTH/Germany Rexroth

Flow Direction

One-way

3C Valve Category

Industrial

Application Areas

Medical & Health, Food/Agricultural Products, Chemical Industry, Agriculture, Forestry, Animal Husbandry & Fishery, Comprehensive

Working Principle of REXROTH Solenoid Directional Valves

Rexroth Solenoid Valves, Rexroth Piston Pumps, Rexroth Relief Valves, Rexroth Proportional Valves, Rexroth Vane Pumps

REXROTH solenoid directional valves come in a wide variety. Based on the number of working positions and passages, they can be divided into 2-position 3-way, 2-position 4-way, 3-position 4-way, etc.; based on their reset and positioning methods, they can be divided into spring-reset, ball-position, and non-reset spring types; based on the connection between the valve body and the solenoid, they can be divided into flange connection and threaded connection; based on the structure of the solenoid, they can be divided into dry type and wet type. Each type has AC, DC, and integrated forms, and requires various power supply voltages, resulting in many structural differences.

A two-position Rexroth solenoid valve means the valve core has two different operating positions (open and closed). Two-way and three-way solenoid valves refer to valves with two or three ports on the valve body; for example, a two-position two-way solenoid valve has one inlet and one outlet (two ports, the most common type); a two-position three-way solenoid valve controls liquids with one inlet and two outlets (one normally open and one normally closed); a pneumatic directional solenoid valve has one inlet, one outlet, and one exhaust port; a hydraulic solenoid valve has one inlet, one outlet, and one return port.

Domestic and international solenoid valves are classified into three main categories based on their operating principle (direct-acting, step-direct-acting, and pilot-operated), and further subdivided into six subcategories based on differences in valve disc structure and materials, as well as differences in operating principles (direct-acting diaphragm structure, step-direct-acting diaphragm structure, pilot-operated diaphragm structure, direct-acting piston structure, step-direct-acting piston structure, and pilot-operated piston structure).

Direct-acting solenoid valve:

Principle: When energized, the solenoid 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 back onto the valve seat, closing the valve.

Features: Can operate normally under vacuum, negative pressure, and zero pressure, but the nominal diameter is generally no more than 25mm.

Distributed 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 directly lifts the pilot valve and the main valve closing element sequentially, opening the valve. When the inlet and outlet reach the starting pressure difference, energizing pilot valves causes the electromagnetic force to increase the pressure in the lower chamber of the main valve and decrease the pressure in the upper chamber, thus 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 element downwards, closing the valve.

4WRKE16E-125L3X6EG24EK31A1D3M

4WRKE16E-200L3X6EG24EK31A1D3M

4WRKE25E350L3X6EG24EK31A1D3M

4WRKE25E500L3XH6EG24EK31A1D3M

4WREE10E50-2XG24K31A1V

4WREE10E75-2XG24K31A1V

A10VSO18DFR131R－PPA12N00

A10VSO28DFR131R－PPA12N00

A10VSO45DFR131R-PPA12N00 A10VSO58DFR131R-PPA12N00

A10VSO71DFR132R-VPB22U99

4WE6D6X/OFEG24N9K4 4WE6D62/EG24N9K4 4WE6D6X/OFEG24N9K4/B18 4WE6D51/AG24NZ4

4WE6B61/EG24N9K4 4WE6B62/EG24N9K4 4WE6D62/EG24N9K4 4WE6Y62/EG24N9K4

4WE6J62/EG24N9K4 4WE6E62/EG24N9K4 4WE6M62/EG24N9K4 4WE6H62/EG24N9K4 4WE6G62/EG24N9K4 4WE6L62/EG24N9K4 4WE10Y33/CG24N9K4 4WE10D33/CG24N9K4

4WE10C33/CG24N9K4 4WE10L33/CG24N9K4 4WE10U33/CG24N9K4 4WE10J33/CG24N9K4

4WE10E33/CG24N9K4 4WE10G33/CG24N9K4 4WE10H33/CG24N9K4 4WE6Y62/EW230N9K4 The Rexroth solenoid directional valve has a sealed chamber with through-holes at different positions, each connecting to a different oil pipe. Inside the chamber is a piston, flanked by two electromagnets. When the coil of one electromagnet is energized, the valve body is attracted to that side. Controlling the movement of the valve body opens or closes different drain holes. 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 moves the piston rod, which in turn drives the mechanical device. Thus, controlling the flow of current to the electromagnets controls the mechanical movement.

The Rexroth solenoid directional valve is an electromagnetically controlled industrial device, a fundamental component of automation for controlling fluids. It is an actuator, not limited to hydraulic or pneumatic systems. It is 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, each playing a different role in the control system. Common types include check valves, safety valves, directional control valves, and speed control valves.

1. REXROTH solenoid directional valve features: High upper limit of fluid pressure range, can be installed arbitrarily (customization required), but must meet fluid differential pressure conditions.

2. Solenoid valves are divided into six subcategories based on differences in valve structure, materials, and operating principles: 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 are 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.

4. According to materials, they can be divided into three main categories:

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

Solenoid Valves

*This series of products is widely used in production and research departments of textiles, printing, chemicals, plastics, rubber, pharmaceuticals, food, building materials, machinery, electrical appliances, surface treatment, etc., as well as in daily life facilities such as bathrooms, canteens, and air conditioning.

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

*This series of products is generally suitable for media such as liquids, water, gas, hot water, oil, and methane.

3) Plastic Solenoid Valves: In some special workplaces and for solenoid valves used 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 such as PVC, CPVC, UPVC, ABS, or PTFE) have particularly excellent corrosion resistance.

Our company mainly deals in European and American brands and can source brands from any European country. For example, our leading 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, ROSS

British brands: Norgren

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