4WE 6 E61/EG24N9K4

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

4 year

Product details

1. Model Breakdown

• 4WEH16L NN

• 4: Indicates4 ports(P, T, A, B), typically a 3-position 4-way directional control valve.

• WEH: Designation forelectro-hydraulic directional control valvesin the Bosch Rexroth series (solenoid-operated).

• 16: Nominal size16mm (DN16), corresponding to a flow range of approximately100–200 L/min(dependent on pressure).

• L: Valve spool function code, representing"L" type center position(P port blocked, A/B ports connected to T port, allowing cylinder float).

• NN: Installation or additional feature code, possibly indicating:

• NG6 interface(ISO 4401 standard);

• Orno spring return(confirm with manufacturer catalog).

2. Key Specifications

• Operating Pressure: Typically315 bar (31.5 MPa)(Bosch Rexroth standard).

• Flow Range: Approx.100–200 L/min(DN16, at 5 bar pressure drop).

• Control Method:

• Solenoid-operated(single/double solenoid actuation);

• Optionalwet or dry solenoid types.

• Voltage: CommonlyDC 24VorAC 110V/220V.

• Response Time: Approx.10–50 ms(dependent on solenoid power).

• Leakage: Internal leakage ≤5 cm³/min(standard value).

3. Typical Applications

• Construction Machinery: Directional control in excavators, loaders.

• Industrial Equipment: Hydraulic circuit switching in injection molding machines, die-casting machines.

• Metallurgical Industry: Hydraulic systems for continuous casting machines, rolling mills.

• Marine Hydraulics: Steering gears, deck machinery oil path switching.

4. Structural Features

• Integrated Design: Solenoid, valve body, and pilot valve in one unit to reduce leakage points.

• Modular Assembly: Stackable with pressure compensators, throttle valves, and other accessories.

• Contamination Resistance: Spool clearance sealing for medium-contamination hydraulic fluids.

• Low-Temperature Adaptability: Optional low-temperature solenoids (for -40°C environments).

5. Selection Considerations

• Center Position Function: "L" type suits floating cylinder applications; for locking, choose "O" or "Y" types.

• Voltage Compatibility: Match with control system (DC 24V common, AC optional).

• Flow Verification: Ensure actual flow ≤ rated flow to avoid excessive pressure drop.

• Environmental Adaptability: Select higher IP-rated solenoids (e.g., IP65) for humid/corrosive conditions.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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Main Product: hydraulic motor , gear box, hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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