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Relief Valves 1AR60 - Integrated Hydraulics


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1AR SERIES RELIEF VALVE
PILOT OPERATED (ISO CAVITY NUMBER: 7789-20-1-0-90) 1AR60
SLIDING SPOOL TYPE
1 _
2
APPLICATION
To limit pressure in a system. Good for continuous duty and accurate pressure control with constant or varying flows.
FEATURES
High accuracy of pilot operated design. Hardened working parts give long, reliable, trouble-free life. Cartridge construction for installation into your own manifold.
OPERATION
When the inlet pressure exceeds the setting of the valve, the pilot section opens, causing a small flow across the orifice in the main spool. The subsequent pressure drop moves the spool against a light spring opening a ring of radial holes in the sleeve, allowing relief flow to tank.
SPECIFICATIONS
Figures based on: Oil Temp = 40°C Viscosity = 40 cSt
Rated Flow
60 litres/min (16 US GPM)
Max Setting
350 bar (5000 psi)
Cartridge Material
Working parts hardened and ground steel. External surfaces zinc plated
Body Material
Standard aluminium (up to 210 bar*) Add Suffix '377' for steel option
Mounting Position
Unrestricted
Cavity Number
CVA20-01-0 (See Section 17)
Torque Cartridge into Cavity
45 Nm (33 lbs ft)
Weight
1AR60 0.18 kg (0.4 lbs) 1AR65 0.36 kg (0.8 lbs)
1AR66 0.48 kg (1.0 lbs)
Seal Kit Number
SK613 (Nitrile) SK613V (Viton)
Recommended Filtration Level
BS5540/4 Class 18/13 (25 micron nominal)
Operation Temp
-20°C to +90°C (Standard seals)
Leakage
35 millilitres/min nominal
Nominal Viscosity Range
5 to 500 cSt
PRESSURE DROP
FLOW-US GPM
_10_
5
15
20
400
350 300 J 250
; 200 : 150 100 50
6000
5000
4000
3000
2000
1000
0
0
15
30 45
FLOW LITRES/MIN
75
60
*For applications above 210 bar please consult our technical department or use the steel body option. Integrated Hydraulics Ltd Integrated Hydraulics Inc
Collins Road, Heathcote Ind. Est., Warwick, CV34 6TF, UK. 7047 Spinach Drive, Mentor, Ohio 44060, USA
Tel: +44 (0) 1926 881171 Fax: +44 (0) 1926 315729 Tel: (440) 974 3171 Fax: (440) 974 3170
Website: www.integratedhydraulics.com Website: www.integratedhydraulics.com

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