MODEL
CKIF
Vented pilot-to-open check valve with external pilot port, sealed pilot, and stem
seal
SERIES 4 / CAPACITY: 480 L/min. / CAVITY: T-19A
This valve is a pilot to open check valve. It has a sealed pilot, a steel seat, and is vented. It allows free flow from
the valve (port 2) to the load (port 1) and blocks flow in the opposite direction. Pressure at the external pilot port will
open the valve from port 1 to port 2. Pilot pressure needed to open the valve is directly proportional to the load
pressure at port 1. The valve is insensitive to pressure at port 2 because the spring chamber references the vent
(port 3).
TECHNICAL DATA
Cavity T-19A
Series 4
Capacity 480 L/min.
Pilot Ratio 3:1
Maximum Operating Pressure 350 bar
Maximum Valve Leakage at 110 SUS (24 cSt) 0,07 cc/min.
Valve Hex Size 41,3 mm
Valve Installation Torque 474 - 508 Nm
Seal kit - Cartridge Buna: 990019007
Seal kit - Cartridge Polyurethane: 990019002
Seal kit - Cartridge Viton: 990019006
Model Weight 1.17 kg.
(S)CONTROL
S External 4-SAE Pilot Port, Vent to Port
3
V External 1/4 NPTF Pilot Port, Vent to
Port 3
(C)CRACKING PRESSURE
C 30 psi (2 bar)
B 15 psi (1 bar)
D 50 psi (3,5 bar)
E 75 psi (5 bar)
F 100 psi (7 bar)
(N)SEAL MATERIAL
N Buna-N
V Viton
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CKIF
Model Code Example: CKIFSCNCONFIGURATION OPTIONS