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LOHCZ

Throttle valve with position indication from Sun Hydraulics

Description

These unbalanced, pilot-to-close logic valves are 2-way switching elements that are spring biased closed. Pressure at either work port 1 or 2 will oppose the spring and tend to open the valve while pressure at port 3 will tend to close it. The force generated by the pressure at port 3, plus the spring force, must be greater than the sum of the forces generated by the pressures at ports 1 and 2 for the valve to remain closed.

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.
  • 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.
  • An optional protective cover, with mounting hardware included, may be ordered separately. See kit number: 991-043.
  • 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-17A
Series 3
Capacity 100 gpm
Capacity (metric) 380 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 .25 in³
Pilot Volume Displacement (metric) 4,1 cc
Pilot Passage into Valve .06 in.
Pilot Passage into Valve (metric) 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) 2 in³/min.@1000 psi
Transition leakage at 110 SUS (24 cSt) (metric) 30 cc/min.@70 bar
Valve Hex Size 1 1/4 in.
Valve Hex Size (metric) 31,8 mm
Valve Installation Torque 150 – 160 lbf ft
Valve Installation Torque (metric) 203 – 217 Nm
Seal kit – Cartridge Viton: 990017006
Model Weight 2.00 lb.
Model Weight (metric) 0.91 kg.
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

Cracking Pressure

D 50 psi (3,5 bar)

Seal Material

N Buna-N
V Viton
Cavity: T-17A
Nominal Capacity: 100 gpm (380 lpm)
Downloads
PDFSTP
Possible variants

LOHCZDN,LOHCZDV,LOHC-ZDN,LOHC-ZDV

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