taiwan DOFLUID hydraulic directional valve

3 week ago

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3 year

Product details

I. Brand Background

DOFLUID (Donghui)is a renowned Taiwanese manufacturer of hydraulic components, established in 1983. Specializing in the R&D and production of hydraulic valves, solenoid valves, proportional valves, and other products, DOFLUID is known for its high precision, reliability, and long service life. Its products are widely applied in industrial machinery, agricultural equipment, construction machinery, and other fields.

II. Core Functions of Hydraulic Directional Valves

Hydraulic directional valves (Directional Control Valves) are used to control the flow direction of hydraulic oil in systems, enabling the start, stop, or directional change of actuators (e.g., hydraulic cylinders, motors). Key functions include:

1. Directional Control: Switching oil paths to alter hydraulic oil flow.

2. Pressure Regulation: Some models integrate pressure-reducing capabilities.

3. Flow Control: Adjusting actuator speed via throttle orifices.

III. Classification of DOFLUID Hydraulic Directional Valves

1. By Operation Method

• Manual Directional Valves: Operated via handles or levers, suitable for simple systems.

• Solenoid Directional Valves: Utilize solenoids to drive valve spool movement, enabling remote automation.

• Types: 2-position 2-way, 2-position 3-way, 3-position 4-way, 3-position 5-way, etc.

• Voltage: Common options include 24V DC, 110V AC, and 220V AC.

• Pilot-Operated Directional Valves: Controlled by hydraulic signals for high-pressure or large-flow applications.

• Electro-Hydraulic Directional Valves: Combine solenoid and pilot valves for rapid response and large-flow control.

2. By Structural Design

• Spool Valves: Valve spools slide within the body, offering good sealing and wide application.

• Rotary Valves: Valve cores rotate to switch oil paths, compact but with relatively poor sealing.

• Poppet Valves: Use conical surfaces for sealing, suitable for high-pressure systems.

IV. Typical Product Specifications (Solenoid Directional Valve Example)

【表格】

Parameter Description

Port Size 6mm, 10mm, 16mm, 25mm, etc., corresponding to different flow requirements.

Rated Pressure Typically 21MPa (3000PSI), with high-pressure models up to 35MPa (5000PSI).

Flow Range 10L/min to 200L/min, depending on the model.

Mounting Style Plate-mounted (ISO standard), pipe-mounted, or cartridge-mounted.

Protection Grade IP65 (dust and waterproof), suitable for harsh environments.

Temperature Range Operating: -20°C to +80°C; Storage: -40°C to +100°C.

V. Applications

1. Industrial Machinery: Injection molding machines, die-casting machines, presses.

2. Agricultural Equipment: Tractors, harvesters, hydraulic systems.

3. Construction Machinery: Excavators, loaders, cranes.

4. Logistics Equipment: Forklifts, stackers, hydraulic controls.

5. Marine & Offshore Engineering: Steering gears, deck machinery.

VI. Selection Guidelines

1. Determine System Requirements:

• Required flow rate, pressure, and switching frequency.

• Operation method (manual, solenoid, pilot-operated).

2. Match Port Size & Connections:

• Select port size based on hydraulic pump flow.

• Confirm connection type (plate, pipe, etc.).

3. Environmental Adaptability:

• For high-temperature or corrosive environments, choose special materials (e.g., stainless steel).

• Explosion-proof areas require solenoids with ATEX certification.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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