Prefill valve

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"As a large hydraulic-operated check valve,this prefill valve shuts off the flow in one direction without leakage,while allowing the flow to pass in the other direction freely.it is manily used to fill the oil to the cylinder to maintain the normal level."

S Specification 50 80
Max.working pressure (MPa) A 1.6
B 31.5
C 31.5
Max.Flow (L/min) -
Working fluid Mineral oil;phosphate-ester
Fluid temp. (℃) ~20-70
Viscosity (mm²/s) 2.8~380
Opening pressure (MPa) a0.02
Weight (kg) 14 32
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。


Specification L1 L2 L3 L4 B1 B2 B3 B4 B5 B6 B7 H1 H2 H3 H4 D1 D2 D3 D4 D5 D6 D7
AF-50 135 75 120 16 110 89 58 120 100 90 51 303.5 33.5 113 25 80f7 66 50 M12 NPT/4" 87 21
AF-80 192 102 180 20 157 106.5 77.5 180 115 130 62 357.5 40.5 160 30 115f7 97 76 M16 NPT/4" 87 31

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