Parker Hannifin Corporation
Fluid System Connectors
Otsego, Michigan
B21
Catalog 3501E
Flow Control Check Valves
Applicable Tube
Tube O.D.
•
PLCK: 5/32, 1/4, 5/16, 3/8
•
VC: 1/4, 5/16, 3/8
Tube O.D. (MM)
PLCK: 4, 6, 8, 10, 12
These in-line check valves allows air to pass in one direction while
blocking flow in the other direction. Their extreme compactness
and light weight make them suitable as a safety item in compressed
air circuits. The body of the fitting contains an arrow to indicate the
direction of flow.
Materials of Construction
Body:
• 32
PLCK: Nylon/nickel
plated brass
• 68
PLCK: Nylon body with
nickel-plated brass base
•
VC:Acetal
Gripping Ring: Stainless Steel
O-Ring:
•
Nitrile (32PLCK & 68PLCK)
•
EPDM (VC)
Nomenclature
Example: W68PLCK-4-2
Attribute:
W
White thread
sealant
68
Tube x Pipe
PL
Prestolok
CK
Check Valve
4
1/4
Tube O.D.
2
1/8
Pipe thread
Nomenclature
Example: A4VC4-MG
Attribute:
A
Acetal
4
1/4
Tube O.D.
VC
Valve, Check
4
1/4
Tube O.D.
MG
Metal gripping ring
Specifications
pRESSURE RANGE:
15
to 145 PSI
Temperature Ranges: 34°F to 150°F
Cracking Pressure:
•
PLCK: 7 PSI
•
VC: 1/3 PSI
Working Fluid:
Compressed air