Rexroth proportional relief valve, DBET-61/100G24K4V

DBET-61/100YG24K4V, REXROTH Solenoid Valve The German Rexroth hydraulic pressure reducing valve is a pneumatically controlled pressure regulating and relief combination valve with outlet pressure feedback. It has the characteristics of both a pressure regulating valve and a relief valve, thus it can simultaneously replace both.

Compared to setting separate pressure regulating and relief valves in the pneumatic system, the system is simplified and the structure is compact.

It also eliminates the pressure difference between the pressure regulating valve and the relief valve, ensuring that the air pressure in the system can be more accurately regulated and stabilized at the required set pressure value.

• DBET-61/100YG24K4V, REXROTH Solenoid Valve

• The German Rexroth hydraulic pressure reducing valve is a pneumatically controlled pressure regulating and relief combination valve with outlet pressure feedback. It has the characteristics of both a pressure regulating valve and a relief valve, thus it can simultaneously replace both.

  Compared to setting separate pressure regulating and relief valves in the pneumatic system, the system is simplified and the structure is compact.

  It also eliminates the pressure difference between the pressure regulating valve and the relief valve, ensuring that the air pressure in the system can be more accurately regulated and stabilized at the required set pressure value.

• The German Rexroth hydraulic pressure reducing valve is a specialized device for automatically reducing the working pressure of pipelines. It is used in pneumatic circuits to regulate the pressure of compressed air, keeping the set pressure value nearly constant.

  The working principle of the German Rexroth hydraulic pressure reducing valve is explained below.

• Rexroth solenoid valves are used in hydraulic systems to control the opening and closing of hydraulic circuits or to change the direction of fluid flow. They typically have a valve core that slides under the electromagnetic force of a coil.

  When the valve core is in different positions, the passage of the solenoid valve also changes. The number of working positions of the valve core determines the number of ports on the valve body, which determines the number of passages.

  After the solenoid valve is installed, all interfaces should be aligned. The working position refers to the position of the valve core.

The valve core is in position A when the coil is not energized and in position B when the coil is energized. The different positions of the valve core either open or close the respective interfaces.

• A two-position solenoid valve from Rexroth (Germany) means that the valve core has two different working positions (open and closed).

  Two-way and three-way solenoid valves refer to solenoid valves with two or three channels on the valve body; for example, a two-position two-way solenoid valve has one inlet and one outlet (two channels, the most common); 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; a hydraulic solenoid valve has one inlet, one outlet, and one return oil.

Solenoid valves, both domestically and internationally, are theoretically classified into three main categories (direct-acting, step-direct-acting, and pilot-operated). Based on differences in valve disc structure and materials, and their underlying 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). **Rexroth Direct-Acting Solenoid Valve (Germany):** **Principle:** When energized, the solenoid coil generates electromagnetic force to lift the sealing element from the valve seat, opening the valve. When de-energized, the electromagnetic force disappears, and the spring presses the sealing element back onto the valve seat, closing the valve. **Features:** Operates normally under vacuum, negative pressure, and zero pressure, but the nominal diameter generally does not exceed 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, upon energization, the electromagnetic force directly lifts the pilot valve and the main valve's sealing 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, causing the pressure in the lower chamber of the main valve to rise and the pressure in the upper chamber to fall. The pressure difference then pushes the main valve upwards.

  When de-energized, the pilot valve uses spring force or medium pressure to push the sealing element downwards, closing the valve.

• Features: Reliable operation even at zero pressure difference, vacuum, or high pressure, but requires higher power and necessitates horizontal installation.

• Working Principle of Rexroth Hydraulic Pressure Reducing Valve

• No pilot signal input; normally closed.

  When compressed air from the pilot air path enters chamber B, this valve begins to operate. The output pressure is controlled by the air pressure entering the pilot air port CP; the outlet pressure is set by adjusting this pressure. Compressed air entering control chamber B through port CP pushes the piston, along with its valve core, upward along the axial direction, overcoming the force of spring 7 and compressing it.

• DB represents pilot-operated relief valve; DBD represents direct-acting relief valve; ZDB represents stacked pilot-operated relief valve; ZDBD represents stacked direct-acting relief valve

• 10 represents 10 nominal diameter

• 5 is uncertain! It should indicate an adjustment method: such as a handle or hex bolt!

• 52 should be a Rexroth series number!

• 315 indicates the highest set pressure level is 31.5 MPa

• Y indicates control oil discharge

• M indicates no one-way valve

• DBET-61/100YG24K4V, REXROTH solenoid valve

Brand

Bosch Rexroth

Series

DBET