AR150 – Pilot Operated Relief Valve
Description
General
| Description | pilot operated relief valve |
|---|---|
| Construction | Screw-in Cartridge construction for cavity |
| Tightening Torque | 60 Nm |
| Ambient Temp. | -20°C to +50°C |
| Cartridge Material | Working: Hardened, ground steel; External: Zinc plated |
| Manifold Material | Aluminium or SG Iron |
| Cavity | TH881 |
| Weight | AR150 Cartridge: 0.30 kg AR150 * 6W **: 0.76 kg AR150 * 8W **: 1.05 kg AR151 * 6W **: 1.00 kg AR2 150 * 6W **: 1.80 kg |
Hydraulic
| Hydraulic Fluid | Mineral oils. Contact sales office for other fluids. |
|---|---|
| Max. Pressure | 400 bar |
| Peak Pressure | 400 bar |
| Max. Flow | 180 lpm |
| Rated Flow | 150 lpm |
| Leakage | up to 80ml/min |
| Max. Contamination Level | ISO 4406 18/16/13 (25 µm nominal) |
| Viscosity Range | 5 to 500 cSt |
| Hydraulic Fluid Temp. | -20°C to +90°C (Standard Seals) |
| Seal Kit Number | Contact sales office |
| Ordering example | AR150 P 6W 20 N 729 |
|---|---|
| Datasheet | 1-320 |
Application
Pressure Relief valves are used to limit the pressure in the system as set on the valve. Pilot Operated Relief Valves are applicable more in systems where pressure regulation is needed over pressure safety. The barrel-piston assembly of the valve implies that the valve is not a zero-leak valve and cannot be used for load holding applications. The valve is ideal for continuous duty providing accurate pressure control with constant or varying flows.
Operation
When the inlet pressure at Port 1 (Pressure) exceeds the setting of the valve, the ball unseats causing the pilot section to open. This results in a small flow across the orifice in the main spool. The subsequent pressure drop moves the secondary spool against a light spring opening a ring of radial holes in the sleeve and allowing relief flow to Port 2 (Tank)
Features
Very low pressure rise for any increase in flow giving accurate pressure control. Smooth operation due to presence of a balanced piston. Hardened working parts ensure a long, reliable, trouble-free life. Cartridge construction gives maximum flexibility in mounting
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