Parker Hannifin Corporation
Fluid System Connectors
Otsego, Michigan
Catalog 3501E
Flow Control Check Valves
B22
32
PLCK In-Line Check Valve
Part
No.
TUBE
SIZE (IN)
L
32
PLCK-5/32
5/32
1.52
32
PLCK-4
1/4
1.61
32
PLCK-5
5/16
2.03
32
PLCK-6
3/8
2.50
W68PLCK Male Check Valve
Part
No.
TUBE
SIZE (IN)
NPT /
UNF
Hex
MM
H
68
PLCK-5/32-0
5/32
10-32
9
1.26
W68PLCK-5/32-2
5/32
1/8
16
1.12
W68PLCK-4-2
1/4
1/8
19
1.42
W68PLCK-4-4
1/4
1/4
19
1.42
W68PLCK-6-4
3/8
1/4
23
1.65
W68PLCK-6-6
3/8
3/8
23
1.65
W68PLCKI Male Check Valve Meter In
Part
No.
TUBE
SIZE (IN)
NPT /
UNF
Hex
MM
H
68
PLCKI-5/32-0
5/32
10-32
9
1.26
W68PLCKI-5/32-2
5/32
1/8
16
1.12
W68PLCKI-4-2
1/4
1/8
19
1.42
W68PLCKI-4-4
1/4
1/4
19
1.42
W68PLCKI-6-4
3/8
1/4
23
1.65
W68PLCKI-6-6
3/8
3/8
23
1.65
32
PLCK In-Line Check Valve
Part
No.
TUBE
SIZE (MM)
L
32
PLCK-4M
4
38.5
32
PLCK-6M
6
41.0
32
PLCK-8M
8
51.5
32
PLCK-10M
10
63.5
32
PLCK-12M
12
66.5
W68PLCK Male Check Valve Meter Out - BSPT
Part
No.
TUBE
SIZE (MM)
BSPT
Hex 1
H
W68PLCK-4M-2R
4
1/8
16
28.5
W68PLCK -6M-2R
6
1/8
16
30.5
W68PLCK -6M-4R
6
1/4
16
30.5
W68PLCK -8M-2R
8
1/8
19
36.0
W68PLCK -8M-4R
8
1/4
19
36.0
W68PLCK -10M-6R
10
3/8
23
42.0
W68PLCK -12M-6R
12
3/8
23
42.0
W68PLCK -12M-8R
12
1/2
23
44.0
W68PLCKI Male Check Valve Meter In - BSPT
Part
No.
TUBE
SIZE (MM)
BSPT
Hex 1
H
W68PLCKI-4M-2R
4
1/8
16
28.5
W68PLCKI -6M-2R
6
1/8
16
30.5
W68PLCKI -6M-4R
6
1/4
16
30.5
W68PLCKI -8M-2R
8
1/8
19
36.0
W68PLCKI -8M-4R
8
1/4
19
36.0
L
L
H
Hex
H
Hex
H
Hex
H
Hex