REXROTH solenoid valve 4WEH10D20/6AG24NETZ4 in stock

Brand

REXROTH/German Rexroth

Flow Direction

Other

3C Valve Category

Industry

Application Areas

Chemical, Petroleum, Mining, Electrical, General

The selection of REXROTH solenoid valves should first follow the four principles of safety, reliability, applicability, and economy. Secondly, it should be based on six aspects of the on-site working conditions (i.e., pipeline parameters, fluid parameters, pressure parameters, electrical parameters, actuation method, and special requirements).

REXROTH Solenoid Valve Selection Basis:

1. Select the solenoid valve based on pipeline parameters: nominal diameter (DN) and connection method

1) Determine the nominal diameter (DN) according to the on-site pipeline inner diameter or flow requirement;

2) Connection method: Generally, >DN50 requires a flange connection; ≤DN50 can be freely selected according to user needs.

2. Selecting Solenoid Valves Based on Fluid Parameters: Material and Temperature Group

1) Corrosive fluids: Corrosion-resistant solenoid valves and all-stainless steel valves are recommended; Ultra-clean edible fluids: Food-grade stainless steel solenoid valves are recommended.

2) High-temperature fluids: Solenoid valves made with high-temperature resistant electrical and sealing materials should be selected, and piston-type valves are preferred.

3) Fluid state: Fluids can be gaseous, liquid, or mixed, especially when the diameter is greater than DN25, these must be clearly distinguished.

4) Fluid viscosity: Generally, any viscosity can be selected below 50 cSt. If it exceeds this value, a high-viscosity solenoid valve should be selected.

3. Selecting Solenoid Valves Based on Pressure Parameters: Principle and Structural Types

1) Nominal pressure: This parameter has the same meaning as other general-purpose valves and is determined by the nominal pressure of the pipeline.

2) Working pressure: If the working pressure is low, a direct-acting or step-direct-acting principle valve must be selected; when the minimum working pressure difference is above 0.04 MPa, direct-acting, step-direct-acting, and pilot-operated valves can all be selected. 4. Electrical Selection: AC220V or DC24V voltage specifications are preferable for convenience.

5. Selection Based on Continuous Operating Time: Normally Closed, Normally Open, or Continuously Energized

1) When the solenoid valve needs to be open for a long time, and the duration is longer than the closing time, a normally open type should be selected.

2) If the opening time is short or the opening and closing times are infrequent, a normally closed type should be selected.

3) However, for some safety protection applications, such as furnace and kiln flame monitoring, a normally open type cannot be selected; a continuously energized type should be chosen.

6. Selection of Auxiliary Functions Based on Environmental Requirements: Explosion-proof, Check Valve, Manual Operation, Water-resistant (fogproof), Water Spray, Submersible.

A two-position Rexroth solenoid valve means that the valve core has two different operating positions (open and closed). Solenoid valves with two or three ports refer to valves with two or three channels on their body. For example, a two-position two-way solenoid valve has one inlet and one outlet (two channels, 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). Pneumatic directional solenoid valves have one inlet, one outlet, and one exhaust valve; hydraulic valves have one inlet, one outlet, and one return valve.

Solenoid valves, both domestically and internationally, are classified into three main categories based on their operating principle (direct-acting, step-direct-acting, and pilot-operated). Based on differences in valve disc structure and materials, and their operating principles, they are further divided into six subcategories (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 valves:

Rexroth 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 back onto the valve seat, closing the valve.

REXROTH solenoid valve features: Operates normally under vacuum, negative pressure, and zero pressure, but the nominal diameter is generally no more than 25mm.

Distributed direct-acting solenoid valve:

REXROTH solenoid valve principle: It combines direct-acting and pilot-operated principles. When there is no pressure difference between the inlet and outlet, upon 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, upon energization, the electromagnetic force actuates the pilot valve, increasing the pressure in the lower chamber of the main valve and decreasing the pressure in the upper chamber, 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.

Rexroth is committed to providing safe, precise, efficient, and cost-effective drive and control technologies for various machines and systems. The company integrates global application experience to develop innovative products, tailoring system solutions and services for customers in every segment of the mobile machinery, mechanical applications and engineering, factory automation, and renewable energy markets. Bosch Rexroth also provides customers with a wide range of hydraulic, electronic drive and control, pneumatic, gear, linear drive and assembly technologies. The company operates in over 80 countries worldwide, employing more than 37,500 professionals. In 2012, its global sales reached nearly €6.5 billion.

Business Segments

Mobile Machinery:

Construction machinery, material handling equipment, agricultural and forestry machinery, commercial/highway vehicles

Mechanical Applications and Engineering, Factory Automation:

Motion mechanisms, automotive industry, mining, oil and gas drilling (surface), stage technology, chemical industry, printing and paper processing, energy technology, material handling, glass machinery manufacturing, rubber processing, semiconductor and electronics industry, woodworking industry, horizontal directional drilling rigs, engines, plastics machinery and grinding mills, metallurgy, mining equipment, assembly and loading/unloading, dredgers, offshore engineering, processing and packaging, testing technology, recycling and waste management, marine engineering, motion simulation technology, solar energy, machine tools (cutting), hydraulic engineering, tunnel boring machines, metal forming machine tools and presses, conveying technology, fluid dynamics research, shipyard equipment, cement industry, sugar industry, pulp and paper machinery.

Renewable Energy:

Wind Energy

Product Groups

Drive Technology, Electronic Drive & Control Technology, Casting Technology, Gear Technology, Industrial Hydraulics, Linear Drive Technology, Travel Hydraulics, Assembly Technology, Pneumatics, Tightening & Welding Technology

Rexroth's Strong Sales Channels

As the Rexroth brand gains increasing recognition in China, many domestic trading companies have begun importing Rexroth products through overseas channels.

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Our company mainly deals in European and American brands and can purchase brands from any European country. For example, our advantageous 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