Flow control valves

Flow control valves for keeping the speed of hydraulic cylinders and motors constant, even when load or pressure changes. Arranged into CETOP flow control valves, in-line flow control valves and cartridge flow control valves, from Oleodinamica Marchesini,…

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  • In-line flow control valves
    In-line flow control valves

    In-line flow control valves with threaded ports: Oleodinamica Marchesini RFP2, RFP3 and VPR3 and Tognella FT270/5.

    The RFP2 is a 2-way compensated valve: it controls the flow passing through, at constant speed. The RFP3 and VPR3 are 3-way valves: they send the set flow to the actuator and the excess to tank or to another circuit, which heats the oil less. The Tognella FT270/5 completes the range. Choose by thread, maximum flow and adjustment range. See also Flow control valves.

    Technical guide: How to choose a hydraulic valve

  • CETOP flow control valves
    CETOP flow control valves

    CETOP (ISO 4401) subplate-mounted flow control valves, including modular (sandwich) types: NG6 (CETOP 3) fine adjustment and pressure-compensated valves, and Duplomatic valves.

    • NG6 (CETOP 3): FT-281/5 one-way fine adjustment regulator, FT-288 for 0-2.5 l/min (two-way and one-way compensated) and FT-289 compensated for 2-22 l/min;
    • Duplomatic: RPC compensated flow regulator, QTM7-SA flow control valve and QDE3 proportional regulator (NG6).

    Compensated valves hold the speed as the load varies; fine adjustment valves suit very small flows. Choose by flow range, direction (one-way or two-way) and NG size. See also Flow control valves.

    Technical guide: How to choose a hydraulic valve

  • Cartridge flow control valves
    Cartridge flow control valves

    Cartridge flow control valves for fitting in manifolds: NEM, Argo-Hytos and Hydac. Choose by cavity.

    • Compensated: 2-way flow control valve for LS circuits (6F2S030500), NEM flow regulator and Argo-Hytos flow valve;
    • Proportional: NEM 2-way and 3-way regulators and Argo-Hytos SD3P / SF32P cartridge;
    • Motion control: Hydac RS08-01-C-N-3-500V.

    Check the cavity, the controlled flow and, for proportional valves, the coil voltage and the control electronics (Electronics and joysticks). Cartridge bodies are under Manifolds and subplates.

    Technical guide: How to choose a hydraulic valve

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Flow control valves for keeping the speed of hydraulic cylinders and motors constant, even when load or pressure changes.

Arranged into CETOP flow control valves, in-line flow control valves and cartridge flow control valves, from Oleodinamica Marchesini, Tognella, Duplomatic, NEM, Argo-Hytos and Hydac.

The difference from a simple restrictor is pressure compensation: a compensated valve holds the set flow even if the downstream pressure changes, so the cylinder always moves at the same speed, loaded or not.

  • 2-way: controls the flow passing through;
  • 3-way (RFP3, VPR3): controls the flow to the actuator and returns the excess to tank, which heats the oil less;
  • Proportional: the flow is controlled by an electrical signal.

Choose by maximum flow, adjustment range (for example 2 to 22 l/min), thread or mounting (NG6 (CETOP 3), in-line, cartridge) and type of adjustment (fine or normal). For speeds without demanding accuracy, a restrictor may be enough.

Technical guide: How to choose a hydraulic valve

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