CETOP 08 hydraulic solenoid valves

In this section, we offer professional CETOP 08 (NG25) hydraulic solenoid valves. These are indirectly controlled (electro-hydraulically) spool directional valves, designed for systems with high oil demand.

Key features:

  • Efficiency: Oil flow up to 650 l/min.

  • Pressure: Continuous operation up to 350 bar.

  • Standard: Full mounting compliance with ISO 4401-08 (replacements for Atos, Rexroth, Vickers).

Available in configurations with 12V, 24V, and 230V coils and a wide range of spools. A proven solution for presses, injection molding machines, and heavy industrial applications.
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FAQ: CETOP 08 (NG25) Hydraulic Solenoid Valves – Questions and Answers
1. What are the maximum parameters for CETOP 08 (NG25) solenoid valves?

CETOP 08 standard (compliant with ISO 4401-08) directional control valves are powerful components designed for handling enormous flow rates.

  • Efficiency: With an internal channel diameter of 25 mm (NG25), these valves effortlessly handle flow rates ranging from 450 to as much as 650 l/min.
  • Pressure: They operate safely at working pressures up to 315 bar (reinforced versions up to 350 bar), making them the foundation for systems with the highest operating power.
2. Where are such large electro-hydraulic distributors most commonly used?

The CETOP 08 series (e.g., 4WEH25 models) is at the heart of heavy industry. You'll find them in:

  • Gigantic hydraulic presses (e.g., for car body pressing or deep drawing).
  • Large-scale plastic injection molding machines.
  • Metallurgical machinery, rolling mills, and drive systems in steel plants.
  • Heavy shipyard equipment, port cranes, and canal locks.
3. How to prevent destructive water hammer at flow rates of around 600 l/min?

Suddenly shifting a large spool and stopping a 600 l/min flow would generate a destructive shock wave in the pipes and pumps. That is why CETOP 08 series valves use restrictor plates (switching time retarders).
Such a restrictor is mounted as a "sandwich" between a small pilot valve (on top) and the main NG25 valve (on the bottom). It allows reducing the flow rate of the control oil, so the huge main spool moves slowly and smoothly (switching time can be extended from fractions of a second to several seconds), ensuring a soft start of the actuator.
4. Internal or external control? How to set up pilot supply (X) and drain (Y) in CETOP 08 valves?

Due to huge pressure drops and impacts in the main working system of heavy machinery, external control is almost always recommended for NG25 valves.
This means that a small control solenoid valve (pilot) on top is supplied with its own independent oil circuit (e.g., from a small gear pump) via channel X, and the oil returns safely straight to the tank via channel Y. This completely bypasses the turbulence and pressure spikes occurring in the machine's main power circuit.
5. Will a CETOP 08 valve from BRhydraulic fit as a replacement for a damaged dispenser of another brand?

Yes. The CETOP 08 designation guarantees that the spacing of mounting bolts, port diameters (P, T, A, B, X, Y), and the position of sealing o-rings on the subplate are standardized worldwide (ISO 4401-08). If your old valve (e.g., Rexroth, Parker, or Vickers) was a size 25 standard, our 4WEH25 series directional control valve will fit perfectly onto the existing subplate. You only need to select the matching spool type (E, G, J, H) and coil voltage.