Hydraulic Rotary Valve

I. Product Introduction

The hydraulic rotary valve is a rotary-type hydraulic control valve, divided into two main categories: two-position three-way rotary valve and three-position four-way rotary valve. It relies on valve core rotation to switch oil circuit flow direction, suitable for hydraulic system oil circuit direction change and on/off control. With wear-resistant and pressure-resistant structure and convenient operation, it is suitable for high-pressure hydraulic energy storage, construction machinery hydraulic circuits, and well control hydraulic applications. Manual rotation completes oil circuit switching, providing stable and durable operation.

II. Model Description

(1) Valve Body Code: Three-position four-way rotary valve code, two-position three-way rotary valve code

(2) Control Method: S - Manual control

(3) Nominal Pressure: Unit MPa

(4) Nominal Diameter: Unit mm

III. Full Series Technical Parameters

1. Model 23zS21-25 Two-Position Three-Way Hydraulic Rotary Valve

Nominal Diameter: 25mm

Nominal Pressure: 21MPa

Rated Flow: 160L/min

2. Model 34zS21-25 Three-Position Four-Way Hydraulic Rotary Valve

Nominal Diameter: 25mm

Nominal Pressure: 21MPa

Rated Flow: 160L/min

3. Model 34ZS21-40 Three-Position Four-Way Hydraulic Rotary Valve

Nominal Pressure: 21MPa

Nominal Diameter: 40mm

Rated Flow: 380L/min

IV. Structure Components

1. Valve Body Housing: Integrated forged valve body, high pressure-bearing strength, suitable for 21MPa high-pressure oil circuit long-term operation.

2. Rotary Valve Core: Precision-machined oil circuit channels, rotary switching of oil circuit on/off and direction change, excellent sealing.

3. Manual Control Assembly: Equipped with manual rotary handle; manual rotation switches valve body working positions.

4. High-Pressure Sealing: High-pressure resistant combination seals, eliminating high-pressure oil circuit internal leakage and external seepage.

5. Positioning Lock Structure: Precise position positioning, rotary spot on self-locking, preventing operational valve core self-displacement.

V. Product Features

1. Manual rotary control, no external electronic control or air source power needed, suitable for field and no-energy oil circuit direction change.

2. Rated pressure 21MPa, suitable for high-pressure hydraulic systems and accumulator hydraulic pipeline integration.

3. Clear position differentiation, complete two-position three-way and three-position four-way types, meeting oil circuit diversion, direction change, and shut-off requirements.

4. Large flow capacity, small oil circuit flow resistance, low pressure loss, suitable for large-flow hydraulic circuits.

5. Light rotary operation, wear-resistant and erosion-resistant valve core, long service life, easy later-stage maintenance.

6. Standardized interface specifications, adaptable to conventional hydraulic pipeline connections, strong installation adaptability.

VI. Application Fields

Widely used in hydraulic energy storage systems, drilling well control hydraulic equipment, construction machinery hydraulic oil circuits, machine tool hydraulic stations, and industrial and mining hydraulic tooling equipment. Used for manual oil circuit direction change, media diversion, and oil circuit isolation, suitable for high-pressure accumulator complete hydraulic unit integration.

VII. Usage Precautions

1. Strictly follow the valve body marked flow direction and position for rotary operation; do not forcefully wrench the handle to avoid valve core displacement and damage.

2. Valve body rated pressure is 21MPa; overpressure use is prohibited to prevent valve body cracking and seal failure oil leakage.

3. Select based on pipeline flow and diameter; 25mm diameter for conventional oil circuits, 40mm diameter for large-flow oil circuit conditions.

4. Clean pipeline impurities and iron filings before connecting oil circuits to prevent hard particles from wearing valve core sealing surfaces and causing internal leakage.

5. Position switching must rotate fully in place, relying on positioning structure locking, to avoid half-open states causing oil circuit pressure stabilization failure.

6. Regularly apply lubricating grease during long-term use to ensure smooth valve core rotation and reduce rotary operation resistance.