MODEL
LKHCZ
Pilot-to-open, spring biased closed, unbalanced poppet logic element with
position switch
SERIES 3 / CAPACITY: 160 L/min. / CAVITY: T-17A
These unbalanced poppet, logic valves are 2-way switching elements that are spring-biased closed. Pressure at
either work port 1 or 2 will further bias the valve to the closed position while pressure at port 3 will tend to open it.
The force generated at port 3 must be greater than the sum of the forces acting at port 1 and port 2 plus the spring
force for the valve to open. NOTE: The pilot area (port 3) is 1.8 times the area at port 1 and 2.25 times the area at
port 2.
This valve incorporates a position switch to provide confirmation that the valve is closed.
TECHNICAL DATA
Maximum Operating Pressure 350 bar
Maximum Valve Leakage at 110 SUS (24 cSt) 0,07 cc/min.
Pilot Volume Displacement 2,5 cc
Pilot Passage into Valve 1,50 mm
Area Ratio, A3 to A1 1.8:1
Area Ratio, A3 to A2 2.25:1
Transition leakage at 110 SUS (24 cSt) 30 cc/min.@70 bar
Seal kit - Cartridge Buna: 990-017-007
Seal kit - Cartridge EPDM: 990-017-014
Seal kit - Cartridge Polyurethane: 990-017-002
Seal kit - Cartridge Viton: 990-017-006
SWITCH SPECIFICATIONS
Supply Voltage 20-30 VDC
Reverse Polarity Protection Yes
Maximum Output Load ≤ 400 mA, Duty Ratio 100%
Short Circuit Protection Yes, Load Short Unlimited
Turn On Time ≤ 25 ms
Hysteresis ≤ .002 in.
Operating Temperature Range -25 to 80 °C
Thermal Shift - 0 to 80 °C ≤ ± 0,1 mm
EMC DIN EN 61000-6-1/2/3/4
Vibration ≥ 50g, 0-500 impulses/sec
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LKHCZ