Rexroth proportional control valve 4WE10F5X/EG24N9K4/M in stock.

Brand

REXROTH/German Rexroth

Rexroth solenoid valves, Rexroth piston pumps, Rexroth relief valves, Rexroth proportional valves, Rexroth vane pumps

Rexroth proportional control valves, also known as control valves, are the final control elements in industrial automation process control. They receive control signals from the control unit and, with the aid of power, change process parameters such as flow rate, pressure, temperature, and level. They generally consist of an actuator and a valve body. Based on stroke characteristics, control valves can be divided into linear and rotary stroke valves; based on the power source of their actuators, they can be divided into pneumatic, electric, and hydraulic control valves; based on their function and characteristics, they can be divided into linear, equal percentage, and parabolic characteristics. Control valves are suitable for air, water, steam, various corrosive media, slurry, oil, etc. English name: control valve; tag number usually begins with FV. Common classifications of control valves: pneumatic control valves, electric control valves, hydraulic control valves, self-operated control valves.

Basic Information on Rexroth Proportional Control Valves:

A Rexroth proportional control valve, also known as a control valve, receives a control signal from a control unit and uses power to change the flow rate of fluid. Control valves generally consist of an actuator and a valve body. Based on the power used by the actuator, control valves can be classified into pneumatic, electric, and hydraulic control valves. Additionally, based on their function and characteristics, they can be classified into linear, equal percentage, and parabolic characteristics.

Rexroth Proportional Control Valve Body Types

There are many types of Rexroth proportional control valve bodies. Commonly used body types include single-seat, double-seat, angle, diaphragm, low-flow, three-way, eccentric rotary, butterfly, sleeve, and ball valves.

When selecting a Rexroth proportional control valve, the following considerations should be taken into account:

(1) Valve Core Shape and Structure

This is mainly based on the selected flow characteristics and unbalanced forces. (2) Wear Resistance

When the fluid medium is a suspension containing a high concentration of abrasive particles, the internal material of the valve must be hard.

(3) Corrosion Resistance

Due to the corrosive nature of the medium, valves with simple structures should be selected whenever possible.

(4) Temperature and Pressure of the Medium

When the temperature and pressure of the medium are high and fluctuate greatly, valves with valve cores and seats whose materials are less affected by temperature and pressure changes should be selected. When the temperature is ≥250℃, a radiator should be added.

(5) Prevention of Flashing and Cavitation

Flashing and cavitation only occur in liquid media. In actual production processes, flashing and cavitation can cause vibration and noise, shortening the service life of valves. Therefore, when selecting valves, it is important to prevent flashing and cavitation.

Control Valve Actuator

To ensure the normal operation of the control valve, the actuator must generate sufficient output force

to guarantee a high degree of sealing and valve opening.

For double-acting pneumatic, hydraulic, and electric actuators, there is generally no return spring. The magnitude of the force is independent of its direction of operation; therefore, the key to selecting an actuator is to determine the maximum output force and the motor torque. For single-acting pneumatic actuators, the output force is related to the valve opening degree. The force exerted on the control valve will also affect its motion characteristics; therefore, force balance must be established across the entire valve opening range.

After determining the actuator's output force, select the appropriate actuator based on the process environment requirements. Pneumatic actuators should be used when explosion-proof requirements exist. For energy conservation, electric actuators should be preferred. Hydraulic actuators can be selected for high control precision, such as speed regulation of power plant transducers and temperature control of catalytic converter reactors in oil refineries.

The operating mode of Rexroth proportional control valves is only relevant when using pneumatic actuators. Its operating mode is formed by combining the direct and reverse actions of the actuator and the valve. There are four combinations: direct-direct (air-to-close), direct-reverse (air-to-open), reverse-reverse (air-to-open), and reverse-reverse (air-to-close). The control valve operating modes formed by these four combinations are air-to-open and air-to-close.

The selection of the operating mode of a control valve is mainly considered from three aspects: a) process safety; b) characteristics of the medium; c) ensuring product quality and minimizing economic losses.

Rexroth proportional control valves are classified by application and function:

a. Two-position valve: mainly used to shut off or connect the medium;

b. Control valve: mainly used to regulate the system. When selecting a valve, the flow characteristics of the control valve need to be determined;

c. Diverter valve: used to distribute or mix the medium;

d. Shut-off valve: usually refers to a valve with a leakage rate of less than one in ten thousand.

Rexroth proportional control valves are classified by main parameters:

1. Classification by pressure

(1) Vacuum valve: working pressure is lower than standard atmospheric pressure;

(2) Low-pressure valve: nominal pressure PN≤1.6MPa;

(3) Medium-pressure valve: PN2.5～6.4MPa;

(4) High-pressure valve: PN10.0～80.0MPa, usually PN22, PN32;

(5) Ultra-high-pressure valve: PN≥100MPa. 2. Classification by Medium Operating Temperature

(1) High-temperature valves: t>450℃;

(2) Medium-temperature valves: 220℃≤t≤450℃;

(3) Normal-temperature valves: -40℃≤t≤220℃;

④ Low-temperature valves: -200℃≤t≤-40℃.

Common Classification Method of Rexroth Proportional Control Valves

This classification method is based on principle, function, and structure, and is currently the most commonly used classification method both domestically and internationally. It is generally divided into nine main categories:

Linear Stroke Pneumatic Control Valves

Linear Stroke Pneumatic Control Valves

(1) Single-seat control valve;

(2) Double-seat control valve;

(3) Sleeve control valve;

(4) Angle control valve;

(5) Three-way control valve;

(6) Diaphragm valve;

(7) Butterfly valve;

(8) Ball valve;

(9) Eccentric rotary valve. The first six are linear stroke, and the last three are rotary stroke. These nine types of products are also the most basic products, also known as ordinary products, basic products, or standard products. All sorts of special and specialized products are improvements and variations based on these nine categories.

Rexroth proportional control valves can be categorized by application as follows:

(1) Soft-seal shut-off valve;

(2) Hard-seal shut-off valve;

(3) Wear-resistant control valve;

(4) Corrosion-resistant control valve;

(5) All-PTFE corrosion-resistant control valve;

(6) All-corrosion-resistant alloy control valve;

(7) Emergency shut-off or venting valve;

(8) Anti-clogging control valve;

(9) Corrosion-resistant and anti-clogging shut-off valve;

(10) Insulated jacketed valve;

(11) High pressure drop shut-off valve;

(12) Small flow control valve;

(13) Large diameter control valve;

(14) High adjustable ratio control valve;

(15) Low-S energy-saving control valve;

(16) Low-noise valve;

(17) Miniature control valve;

(18) Lined (rubber, PTFE, ceramic) control valve;

(19) Water treatment ball valve;

(20) Caustic soda valve;

(21) Phosphate ammonium valve;

(22) Chlorine control valve; (23) Bellows-sealed valve…

4WEH10S4X/6EW220-50NZ5L

4WEH10S4X/6EG24NZ5L

4WEH10S4X/6EW220-50NEZ5L

4WEH10S4X/6EG24NEZ5L

4WEH10S4X/6EW220-50NETZ5L

4WEH10S4X/6EG24NETZ5L

4WEH10S4X/6EW220-50NTZ5L

4WEH10S4X/6EG24NTZ5L

4WEH10V4X/6EW220-50NZ5L

4WEH10V4X/6EG24NZ5L 4WEH10V4X/6EW220-50NEZ5L

4WEH10V4X/6EG24NEZ5L

4WEH10V4X/6EW220-50NETZ5L

4WEH10V4X/6EG24NETZ5L

4WEH10V4X/6EW220-50NTZ5L

4WEH10V4X/6EG24NTZ5L

4WEH10W4X/6EW220-50NZ5L

4WEH10W4X/6EG24NZ5L

4WEH10W4X/6EW220-50NEZ5L

4WEH10W4X/6EG24NEZ5L

4WEH10W4X/6EW220-50NETZ5L 4WEH10W4X/6EG24NETZ5L

4WEH10W4X/6EW220-50NTZ5L

4WEH10W4X/6EG24NTZ5L

4WEH16E6X/6EW220-50NZ5L

4WEH16E6X/6EG24NZ5L

4WEH16E6X/6EW220-50NEZ5L

4WEH16E6X/6EG24NEZ5L

4WEH16E6X/6EW220-50NETZ5L

4WEH16E6X/6EG24NETZ5L

4WEH16E6X/6EW220-50NTZ5L

4WEH16E6X/6EG24NTZ5L 4WEH16E6X/6EW220-50NETS2Z5L

4WEH16E6X/6EG24NTS2Z5L

4WEH16F6X/6EW220-50NZ5L

4WEH16F6X/6EG24NZ5L

4WEH16F6X/6EW220-50NEZ5L

4WEH16F6X/6EG24NEZ5L

4WEH16F6X/6EW220-50NETZ5L

4WEH16F6X/6EG24NETZ5L

4WEH16F6X/6EW220-50NTZ5L

4WEH16F6X/6EG24NTZ5L

4WEH16F6X/6EW220-50NETS2Z5L 4WEH16F6X/6EG24NTS2Z5L

4WEH16G6X/6EW220-50NZ5L

4WEH16G6X/6EG24NZ5L

Our company mainly deals in 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's subsidiary), MOOG (USA), ASCO (USA), MAC (USA), NUMATICS (USA), PARKER (USA), VICKERS (USA), ROSS (USA), Norgren (UK), OMAL (Italy), ATOS (Italy), CAMOZZI (Italy), UNIVER (Italy), and Camozzi (Italy).