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LKFCZ

Throttle valve with position indication from Sun Hydraulics

Description

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.

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  • The position switch in this valve provides confirmation that the valve is closed.
  • Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
  • These valves have positive seals between port 2 and the pilot area.
  • This cartridge is supplied as a sealed, factory set unit and is not field serviceable. Any tampering will violate the product warranty.
  • When torquing this cartridge into its cavity, a crow’s foot wrench or similar will be required since the position switch precludes the use of a deep socket wrench.
  • Because these valves are unbalanced, operation is pressure dependent. Opening and closing of the poppet are functions of the force balances on three areas: Port 1 = 100%, Port 2 = 80%, and the Pilot Area = 180%.
  • These valves are pressure responsive at all ports, therefore it is essential to consider all aspects of system operation through a complete cycle. Pressure changes at any one port may cause a valve to switch from a closed to an open position, or vice versa. All possible pressure changes in the complete circuit must be considered to assure a safe, functional system design.
  • All ports will accept 5000 psi (350 bar).
  • Position switch is CE approved.
  • Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.

Technical Data

Note: Data may vary by configuration. See CONFIGURATION section.

Cavity T-2A
Series 2
Capacity 20 gpm
Capacity (metric) 80 L/min.
Maximum Operating Pressure 5000 psi
Maximum Operating Pressure (metric) 350 bar
Maximum Valve Leakage at 110 SUS (24 cSt) 1 drops/min.
Maximum Valve Leakage at 110 SUS (24 cSt) (metric) 0,07 cc/min.
Pilot Volume Displacement .06 in³
Pilot Volume Displacement (metric) 0,98 cc
Pilot Passage into Valve .035 in.
Pilot Passage into Valve (metric) 0,9 mm
Area Ratio, A3 to A1 1.8:1
Area Ratio, A3 to A2 2.25:1
Transition leakage at 110 SUS (24 cSt) 2 in³/min.@1000 psi
Transition leakage at 110 SUS (24 cSt) (metric) 30 cc/min.@70 bar
Valve Hex Size 1 1/8 in.
Valve Hex Size (metric) 28,6 mm
Valve Installation Torque 45 – 50 lbf ft
Valve Installation Torque (metric) 61 – 68 Nm
Model Weight 1.34 lb.
Model Weight (metric) 0.61 kg.
Seal kit – Cartridge Viton: 990202006
Supply Voltage 20-30 VDC
Operating Temperature Range -25 to 80 °C
Vibration ≥ 50g, 0-500 impulses/sec
Shock >50 g, 1ms
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.
Thermal Shift – 0 to 80 °C ≤ ± .004 in.
Thermal Shift – 0 to 80 °C ≤ ± (metric) 0,1 mm
EMC DIN EN 61000-6-1/2/3/4
Connector M12 X 1 (4) Pin
Connector Environment Rating IP65

Configuration Options

Minimum Pilot Pressure

D 50 psi (3,5 bar)

Seal Material

N Buna-N
V Viton
E EPDM
Cavity: T-2A
Nominal Capacity: 80 lpm (20 gpm)
Downloads
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Possible variants

LKFCZDN,LKFCZDV,LKFC-ZDN,LKFC-ZDV

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EA Rosengrens gata 29
421 32 Västra Frölunda

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