Explosion isolation proportional cartridge relief valve GDBCY

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Technical specification
j Specification   25 32 40 50
Max. working pressure (MPa) Oil ports A, B. X 31.5
Oil ports Y 0 Mpa, return to oil tank
Working pressure (MPa) 7 16 25 31.5
Max. Flow (L/min) 400 750 1000 2000
Working fluid Mineral oil;phosphate-ester
Fluid temp. (℃) -20~70
Viscosity (mm²/s) 15~380
Hysteresis (%) <3
Repeatability (%) <2
Linearity (%) <3.5
Working voltage (V) DC24
Rated current (mA) 750
Coil resistance (Ω) 19.5
Insulation grade IP55
Cleanliness
The maximum allowable cleanliness of the oil should be according to 9th degree of Standard NAS1638.lt is suggested that the minimum filter rating should be β10≥75。

DN A B C D E F G L M N P R S
GDBCY-25 4 13 29 58 62 58 29 85 M12 6 6 30 8
GDBCY-32 6 18 35 70 76 70 35 102 M16 6 6 38 8
GDBCY-40 7.5 19.5 42.5 85 92.5 85 42.5 125 M20 6 10 46 8
GDBCY-50 8 20 50 100 108 100 50 140 M20 8 10 46 8


DN d1 d2 d3 d4 L1 L2 L3 L4 L5 L6 L7 U W
GDBCY-25 45 34 25 27 58 72 70 57 30 2.5 2.5 0.03 0.05
GDBCY-32 60 45 32 38.5 70 85 83 68.5 30 2.5 2.5 0.03 0.1
GDBCY-40 75 55 40 54.5 87 105 102 84.5 30 3 3 0.05 0.1
GDBCY-50 90 68 50 52.5 100 122 117 97.5 35 3 3 0.05 0.1
 

1. When installing the product, consider horizontal position firstly.
2. The medium used in the hydraulic system must be filtered, its accuracy at least should be20 um
3. Screw should be according to the parameters of catalogue.
4. The surface, connecting with the valve,should be Ra0.8 roughness, and 0.01/100mm flatness.


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