Check valves
Check valve and pre-ll valve type F
Check valves and pre-ll valves are a type of non-return valve. Check valves block the oil
ow in one direction and open in the other direction. Pre-ll valves are check valves with
hydraulic release. They are used, e.g. in top ram presses for suction and emptying the press
cylinder on rapid closing and opening.
The check valve and pre-ll valve type F is a spring-loaded disk valve and has zero leakage
in the closed state. The valve is attached directly to the cylinder and clamped between the
base of the cylinder and the welding-neck ange. Alternatively the valve is installed in the
line between the front faces of the welding-neck anges.
The valves type F25 - F80 are available with hydraulic release. Hydraulic release suppresses
relief surges that can occur at high pressure and with a large consumer volume.
Features and benets:
■ Wafer design
■ Extremely large ows, up to 7000 l/min
Intended applications:
■ Press control systems
Nomen- Check valve
■ Injection moulding machines clature: Check valve with hydraulic release
(pre-ll valve)
Design: Intermediate section between pipe anges
Actuation: Hydraulic
pmax: 400 bar
Qmax: 7000 l/min
Design and order coding example
F25
Basic type, size Check valve type F, size 25 to 200
F81B-36 V
Additional versions: Without pre-release (-)
With pre-release (V), size 25 to 80
Basic type, size Pre-ll valves type F, size 25 to 200
Additional functions
■ With holes in the mounting ange (B)
Function
Check valve Pre-ll valve
© HAWE Hydraulik SE HAWE Products - 04-2017-5.2 1/2
General parameters and dimensions
Check valve Pre-ll valve
Qmax pmax Release ratio Dimensions m
[lpm] [bar] [mm] [kg]
Check valve Pre-ll valve pA / pZ D H1 H2 H3 Check valve Pre-ll valve
F 25 F 25-12 100 400 4.3 83 26 36 43 1 1.1
F 32 F 32-16 160 3.6 93 27 45 55 1 1.2
F 40 F 40-20 250 3.9 108 28 48.5 60 1.4 1.7
F 50 F 50-25 400 4.2 128 29 59 72 2 2.4
F 63 F 63-30 630 4.2 143 33.5 69 83 2.8 3.4
F 64 B-30 760 4,2 143 33,5 69 83 2,8 3,4
F 80 F 80-36 1000 4.5 169 38.5 83 97.5 4.4 5.2
F 81 B-36 1200 4,5 169 38,5 83 97,5 4,4 5,2
F 100 F 100-45 1600 4.3 212 44 97 118 9.9 11.7
F 101 B-45 1920 4,3 212 44 97 118 9,9 11,7
F 125 F 125-60 2500 4.3 248 51 127 155 15.8 19.6
F 126 B-60 3000 4.3 248 65 - 175 - 19.7
F 160 F 160-76 4000 4.3 310 70 182 233 43 50
F 161 B-76 4800 4.3 310 85 - 245 - 44
F 200 F 200-100 7000 320 4.0 420 150 250 300 114 120
Associated technical data sheets:
■ Check valve and pre-ll valve type F: D 6960
K_F-en HAWE Products - 04-2017-5.2
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