LFR Series Solenoid Valves

General Specifications

The following specifications apply to all LFR Series valves, unless otherwise noted.

Life Expectancy

The valves will typically operate for a minimum of 10 million cycles on water.

Operating Pressure

The valves will operate within the normal pressure range when supplied with the
rated voltage (+/- 5%).

  • Valve Proof Pressure: 2x normal operating pressure
  • Valve Burst Pressure: 3x normal operating pressure

Operating Temperature

  • Maximum allowable solenoid temperature is 200°F (90°C)
  • Increasing the operating temperature tends to limit the coil performance.
  • The valve duty cycle must be evaluated to prevent the coil temperature from exceeding 200°F (90°C).
  • Storage temperature is -20°F to 180°F (-28° to 80°C)
  • Minimum and maximum ambient operating temperatures are dependent on the elastomer selection. Lower temperatures will increase the response time needed. If the temperature is too low, the valves may fail to open (ref. chart below for temperatures ranges of the 3 elastomers). For applications with temperatures below those listed, please contact The Lee Company.

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MATERIAL MINIMUM MAXIMUM
EPDM 30°F (1°C) 120°F (49°C)
FKM 45°F (7°C) 120°F (49°C)
FFKM 70°F (21°C) 120°F (49°C)

Response Time

  • Typical response time is 30 ms maximum at 68°F (20°C), 2Hz air at 10 psig.
  • Response times can be enhanced with the use of high speed drive circuits.
  • Lower temperatures will decrease response time (dependent on type of elastomer used in diaphragm).

Filtration

Filtration of 35 microns or finer is recommended.

Port Connections

Several different port (fluid) connections are available.

  • Barbed: Ports designed for use with 1/16" I.D. flexible tubing
  • 1/4-28: Ports designed for standard 1/4-28 flat bottom fittings
  • Manifold Mount: See manifold mounting details.

Valve Mounting

1/4-28 and Barbed Port Valves: Mount valves using #2 (2 mm) screws allowing 0.52" (12.7 mm) of screw length for valve thickness. Torque screws to 15 in-oz max.

Manifold Mount Valves

Minimum center to center spacing is 0.5" (12.7 mm). One gasket per valve is required for mounting (Part Number LHWX0218130A for FKM, LHWX0218140A for EPDM and LSWX0508210A for FFKM.) Each valve requires four #2 (M2) screws for mounting. Screws should be torqued to 13.5-16.5 in-oz (0.095-0.117 N-m).

Electrical Connections

The LFR coils are not polarized and therefore can be connected to the power in either
direction. There are three different styles of electrical connections.

  • Lead wires: Valves are supplied with 6", #26 AWG lead wires. The ends are stripped and tinned. Electrical connectors can be added as specials.
  • Pins: Valves are supplied with two 0.025" square electrical pins. These pins are spaced 0.20" apart and will work with standard electrical connectors designed for 0.10" spacing.
  • Pins with Locking End Caps: These are similar to pins, but a secondary retention clip has been added. These will work with AMP 104257-2 style connectors.The Lee Company offers compatible lead wire sets in two different lengths:
    • 6" lead wire set: Part Number LSWX0504300A
    • 24" lead wire set: Part Number LSWX0606700A

Electrical Characteristics

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RATED VOLTAGE (vdc) RESISTANCE (ohms) Inductance Closed (mH)
12 91 930
24 360 217
  • Holding voltage is 50% of operating voltage.