Classification of Rexroth solenoid valves and their introduction

Create Date: 2024-8-30 12:03:23|Source: Rexroth/Rexroth

1. Direct-acting solenoid valve

Principle: When the normally closed type is energized, the electromagnetic coil generates electromagnetic force to lift the open part from the valve seat and open the valve; When the power is off, the electromagnetic force disappears, the spring presses the opening on the valve seat, and the valve is open.

Features: It can work normally under vacuum, negative pressure and zero pressure, and the diameter is generally not more than 25mm.

2. Step-by-step direct-acting solenoid valve

Principle: When the inlet and outlet reach the starting pressure difference, after the power is applied, the electromagnetic force pilot small valve, the pressure of the lower chamber of the main valve rises, the pressure of the upper chamber decreases, and the pressure difference is used to push the main valve upward; When the power is off, the pilot valve uses spring force or medium pressure to push the shut-off and move down to close the valve.

Features: It can also operate when there is zero pressure difference or vacuum and high pressure, but the power is large and must be installed horizontally.

3. Indirect pilot operated solenoid valve

Principle: When energized, the electromagnetic force opens the pilot hole, the pressure of the upper chamber drops rapidly, and a low and high pressure difference is formed around the open part, and the fluid pressure pushes the open part to move upwards and the valve opens; When the power is off, the spring force opens the pilot hole, and the inlet pressure quickly forms a low and high pressure difference around the closing valve through the bypass hole, and the fluid pressure pushes the opening to move down and open the valve.

Features: small size, low power, high upper limit of fluid pressure range, can be installed arbitrarily but must meet the fluid pressure difference conditions.

Classification of Rexroth solenoid valves and their introduction

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