Hydraulic Solenoid Valves 4WE6 (NG6 / CETOP 3)

The industry standard in your machine. 4WE6 spool valves are the most commonly used solenoid valves in power hydraulics. Nominal size NG6 (CETOP 3) . We offer valves with flow rates up to 80 l/min and pressures of 315 bar . Fully interchangeable with Bosch Rexroth, Parker, Vickers, and Atos products. All spool diagrams and coil voltages are available (12V, 24V, 230V).
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4WE6 type distributors – Universal Standard NG6

The 4WE6 solenoid valve is the foundation of control in modern machinery. It is a solenoid-operated, spool valve designed for subplate mounting (block mounting). Its design is standardized according to ISO 4401-03 , meaning the mounting hole spacing is identical across all manufacturers worldwide.

Why "4WE6"?

This symbol encodes key parameters:

  • 4 – Number of roads (ports: P, T, A, B).
  • W – Electric control (solenoid).
  • E – Slider construction.
  • 6 – Nominal size (flow diameter 6 mm, so-called NG6).

Available slider configurations (Schemes)

Our offer includes 4WE6 valves with different types of sliders that determine how the oil behaves in the neutral position (when there is no power):

  • Type E: All paths closed. Actuator blocked, pump loaded (requires bypass valve).
  • Type J: All-way connected (PTAB). Pump balanced to the downstream side, "floating" actuator.
  • Type H: Paths A and B cut off (actuator blocked), path P connected to T (pump unloaded – so-called idle run).
  • Type G: Path P cut off, A and B connected to T.

Technical Parameters

Our 4WE6 solenoid valves are characterized by high efficiency:

  • Maximum flow: Up to 60-80 l/min (depending on manufacturer and slide).
  • Working pressure: Up to 315 bar (ports P, A, B) and 160 bar (port T).
  • Control voltages: Replaceable coils 12V DC, 24V DC (mobile) and 110V AC, 230V AC (industrial).
  • Emergency override: Each valve has a push button (stem) for manual operation in the event of a power failure.

Application

Due to their compact dimensions and high power, 4WE6 valves operate in:

  • CNC machine tools, lathes, milling machines.
  • Injection molding machines and small presses.
  • Agricultural machinery (wrapper, baler).
  • Municipal vehicles (garbage trucks, sweepers).

FAQ: Hydraulic Solenoid Valves 4WE6 (NG6 / CETOP 3)
1. What do the abbreviations 4WE6, NG6, and CETOP 3 mean? Are they the same valve?

Yes, in workshop practice these three names refer to the same valve standard.

  • 4WE6: This is a common code designation for a 4-way electrically (solenoid) operated spool valve with a nominal size of 6.
  • NG6 (Nominal Size 6): Indicates that the internal diameter of the flow channels in the valve is 6 mm.
  • CETOP 3: This is a European standard that specifies the spacing of mounting holes on a manifold. Any valve marked CETOP 3 (regardless of manufacturer) will fit on the same manifold.
2. What is the maximum flow and pressure for the 4WE6 solenoid valve?

The 4WE6 series manifolds are extremely efficient and compact components.

  • Maximum flow: Optimally handles oil flow up to 60-80 l/min (depending on slide type and manufacturer).
  • Maximum working pressure: Withstands pressure up to 315 bar on ports P, A and B and up to 210 bar on port T (drain to tank).
    Thanks to these parameters, they are the most frequently chosen solution for front loaders (Turów), wrappers, workshop presses and smaller machine tools.
3. What is the difference between the 4WE6 and 4WE10 valves? When should I choose the larger model?

The main difference is the throughput and installation size:

  • 4WE6 (CETOP 3 / NG6): Designed for systems with flow rates up to 80 l/min. It has a smaller mounting bolt spacing (typically M5 bolts).
  • 4WE10 (CETOP 5 / NG10): Used in systems with higher pump capacity, handling flows up to 120 l/min. Requires a larger connection plate (M6 screws).
    If your system generates flow above 80 l/min, using a 4WE6 valve will result in flow throttling, oil overheating, and power loss. In this case, you should choose the 4WE10 series available from BRhydraulic.
4. What do the letters in the valve names mean, e.g. 4WE6E, 4WE6G, 4WE6J?

The letter at the end of the symbol 4WE6 specifies the hydraulic diagram of the slider , i.e. how the oil behaves when there is no current to the coil (neutral position):

  • 4WE6E (spool E): Closed position. All channels (P, T, A, B) are closed. The actuator is stationary and the pump must pump oil through the relief valve. The most common choice in agriculture.
  • 4WE6G (spool G): In the middle position the pump is unloaded (oil from port P flows to T), but the A and B ports to the actuator are closed (actuator is stationary).
  • 4WE6J / 4WE6H: Specific connection systems, used, among others, in systems with hydraulic motors, where free run of the machine is required after the power is turned off.
5. Can I connect hydraulic hoses directly to the 4WE6 valve?

No. The 4WE6 (CETOP 3) series solenoid valves are plate-mount valves. They have a flat underside with holes and sealing O-rings. To connect hoses to them, you must purchase an NG6 connecting (division) plate , into which hydraulic connectors are screwed. These plates are available in our store and allow for connecting valves into blocks (also known as valve islands).

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