MODEL
LOKD
Vent-to-open, spring biased closed, unbalanced poppet logic element with pilot
source from port 1 or 2
SERIES 4 / CAPACITY: 1100 L/min. / CAVITY: T-19AU
(X)CONTROL
X Not Adjustable
(D)CRACKING PRESSURE
D 50 psi (3,5 bar)
(N)SEAL MATERIAL
N Buna-N
V Viton
NOTE: DATA MAY VARY BY CONFIGURATION. SEE CONFIGURATION SECTION.
These unbalanced, vent-to-open logic valves are 2-way switching elements that are spring-biased closed and
incorporate an integral shuttle so that the higher of pressures at either port 1 or port 2 can be used as a pilot
source. With port 3 blocked, the valve is held in the closed position by the spring force. With port 3 vented, the
valve will open provided there is sufficient pressure to overcome the spring force. The force generated at port 3,
plus the spring force, must be greater than the sum of the forces acting at port 1 and port 2 for the valve to remain
closed. NOTE: The pilot area (port 3) is 1.8 times the area at port 1 and 2.25 times the area at port 2.
TECHNICAL DATA
Cavity T-19AU
Series 4
Capacity 1100 L/min.
Maximum Operating Pressure 350 bar
Maximum Valve Leakage at 110 SUS (24 cSt) 0,7 cc/min.
Pilot Volume Displacement 7,7 cc
Area Ratio, A3 to A1 1.8:1
Area Ratio, A3 to A2 2.25:1
Control Orifice Diameter 0,9 mm
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 1.16 kg.
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LOKD
Model Code Example: LOKDXDNCONFIGURATION OPTIONS