6-7
Catalogue HY11-3500/UK
Threaded Check Valves
Series RK, RB
6
RK-RB_UK.INDD RH 21.09.09
Parker Hannifin GmbH
Hydraulic Controls Division
Kaarst, Germany
1)
Thread runout x must be maintained. It may be smaller, but
not larger (requirement for a perfect seal using the O-ring).
2)
Fully cut-out thread
Mounting cavity
• forconnectingincombinationwithtubetting
• forinternallinechannels
Type Thread L l
1
d d
1
d
2
h d.c. O-ring
RK0 G1/8A 7.2 4 8.6 1.8 1.6 1.3 6.8 6x1
RK1 G1/4A 9 4.5 11.5 2.4 2.2 1.5 8.8
-0.1
9x1
RK2 G3/8A 11 6 15 3.2 3 2.5 11 11x1.5
RK3 G1/2A 13 7.5 18.5 4 3.8 3 14.2
-0.1
14x1.5
Type Thread L l
1
d d
1
h ww O-ring
RB1 G1/4A 9.8 5 11.6 2 1.3 5 9x1
RB2 G3/8A 11.5 7.0 15 2.8 2 6 11x1.5
RB3 G1/2A 13.15 7.5 18.5 3.2 2.5 8 14x1.5
Type Thread D D
1
t t
1
2)
x
1)
a
1
d
2
RK0 G1/8 8.7 5 12.3 10 2.3 9.5 5
RK1 and RB1 G1/4 11.8 8 14 11 3 11 6
RK2 and RB2 G3/8 15.25 9 17 14 3 13 8
RK3 and RB3 G1/2 19 12 22 18.5 3.5 16 12
Type Thread D D
1
t t
1
2)
x
1)
RK0 G1/8 8.7 5 16 13.7 2.3
RK1 and RB1 G1/4 11.8 8 22 19 3
RK2 and RB2 G3/8 15.25 9 24.5 21.5 3
RK3 and RB3 G1/2 19 12 29 25.5 3.5
Dimensions
Type RK Type RB
* Required depth depending on type of screw plug, connecting plate,
etc. used.