AR I – Pilot Operated Relief Valve
Description
General
| Description | pilot operated relief valve |
|---|---|
| Construction | Screw-in Cartridge construction for cavity |
| Tightening Torque | 210 Nm |
| Ambient Temp. | -20°C to +50°C |
| Cartridge Material | Working: Hardened, ground steel; External: Zinc plated |
| Manifold Material | Not available |
| Cavity | Sun T-16A |
| Weight | AR I P * N Cart: 0.55 kg |
Hydraulic
| Hydraulic Fluid | Mineral oils. Contact sales office for other fluids. |
|---|---|
| Max. Pressure | 350 bar |
| Peak Pressure | 400 bar |
| Max. Flow | 800 lpm |
| Rated Flow | 380 lpm |
| Leakage | 65 cc/min @ 70 bar |
| 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 | AR I P 20 N |
|---|---|
| Datasheet | 1-924 |
Application
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. The valve is ideal for continuous duty providing accurate control with constant or varying flows.
Operation
When the inlet pressure at Port 1 (Pressure) exceeds the setting of the valve, the pilot section opens. This creates an internal pressure drop which causes the main section to open allowing relief flow to Port 2 (Tank)
Features
Extremely 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
Sun T-16A
Available on request. Ask an engineer →
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Tucson Hydrocontrols designs and manufactures hydraulic cartridge valves in India, with technical support for component selection and OEM applications.
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