Pressure, Flow and Load-Holding Valves
Relief, sequence, reducing, counterbalance, pilot-operated check and flow control valves, in cartridge or line-mounted form, for circuits that need pressure or speed set locally.
Features
- Cartridge valves screw into a manifold cavity and can be changed without breaking pipework, which makes setting up a new circuit far quicker.
- Pressure-reducing valves give a second, lower pressure to one service; a reducing valve is not a substitute for a relief valve and does not protect the circuit.
- Counterbalance valves hold a load against gravity and are set above the load-induced pressure, so the setting depends on the load, not the pump.
- Pressure-compensated flow controls keep speed steady as load changes, where a simple restrictor does not.
- Pilot-operated check valves need a pilot ratio suited to the cylinder area ratio, otherwise the load will not release smoothly.
Specifications
| Figure | Typical range | Unit | Why it matters |
|---|---|---|---|
| Function | counterbalance, pilot-assisted | names the behaviour the circuit needs | |
| Adjustment range | 20 - 250 | bar | the setting must fall inside the range with margin at both ends |
| Flow capacity | 30 - 120 | l/min | undersized cartridges chatter and heat the oil |
| Cavity or body | screw-in cartridge, 3-port cavity | fixes what manifold it can go into | |
| Pilot ratio | 3 : 1 | on load-holding valves it decides whether the load releases smoothly |