24BI1-B10H-T-LH Hydraulic Directional Valve

24BI1-B10H-T-LH Hydraulic Directional Valve

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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Product details

The 24BI1-B10H-T-LH is a typical solenoid-operated directional hydraulic valve, widely used in the hydraulic system of various construction machinery, machine tools, and industrial equipment to control the direction of oil flow, thereby realizing the reversing, starting, or stopping of actuators.

Its model code is generally broken down according to domestic hydraulic component naming conventions as follows:

· 24: Indicates a 2-position, 4-way structure, meaning the spool has two working positions and four main ports (P, T, A, B).

· B: Subplate mounting. The valve body is mounted via its bottom face, with the ports sealed against a manifold or subplate using O-rings.

· I1: Usually indicates a wet-type solenoid and design sequence number (I stands for wet-type, integral rectifier type, or AC self-rectifying solenoid; 1 is the sequence number). This construction allows the solenoid armature to operate immersed in oil, providing better heat dissipation, lubrication, and reduced shifting shock.

· B (in B10H): Re-emphasizes subplate mounting, and also serves to separate the nominal size code.

· 10: Nominal size 10 mm, corresponding to the standard size 10 subplate mounting dimensions.

· H: Spool function H-type. For a 2-position 4-way valve, the H-type spool in its initial position typically interconnects all ports (P, A, B, T), allowing pump unloading and leaving the actuator in a floating condition. It is often used in hydraulic system circuits where unloading or prevention of pressure trapping is required.

· T: Spring-offset/return. The spool is held in the initial function position by a spring under normal conditions; it shifts to the other position when the solenoid is energized, and automatically returns to the original position when de-energized.

· LH: Auxiliary function marking, commonly meaning with indicator light (L) and emergency manual override button (H) (also called a locking or non-locking manual plunger), facilitating manual operation of this hydraulic valve during commissioning or emergencies.

24BI1-B10H-T-LH Hydraulic Directional Valve Full Introduction

1. Model Code Explanation

- 24: 2-position 4-way spool configuration

- B: Plate mounting connection

- I: AC wet-type solenoid (integrated rectifier, standard AC220V)

- 1: Type I1 spool function

- B10: Nominal port size DN10 (10mm)

- H: Rated working pressure 31.5MPa

- T: Spring return & centering design

- LH: Threaded port with separate drain port L

2. Main Technical Specifications

- Rated pressure: 31.5MPa; Rated flow: 40L/min

- Max back pressure on T return port: 6.3MPa (T port must connect to return line)

- Medium: Mineral hydraulic oil, operating temp -20℃~+70℃

- Solenoid: Standard AC220V, 40W; optional DC24V

- Mounting: Standard plate installation for NG10 manifold

3. Operating Principle

The AC wet solenoid drives the spool axially to switch oil paths. When energized, spool shifts to reverse oil flow; when power cuts off, dual springs reset the spool automatically to change actuator movement direction. It can be converted to 2-position 2-way valve by blocking A or B port, while T port must remain open for oil return.

4. Features & Applications

Features

Long service life, low leakage, compact manifold layout, strong contamination resistance, fast switching response.

Applications

Machine tools, textile & papermaking machinery, injection molding equipment, light construction machinery, and pilot control for large hydraulic valves.

5. Installation Guidelines

Install horizontally; limit T-port backpressure strictly; equip ≤30μm oil filter; protect solenoid coil from moisture and overvoltage.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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Address: Ningbo, China

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