Lee Flow Controls
A guide for selecting the right Lee Flow Control for your application
  • Metered Flow in One Direction and No Flow in the Other
  • Poppet Lifts to Wide Open Position with only 20 psid
  • Choice of Four Sizes
  • Wide Lohm Rate Selection
  • High Pressure Models Available
  • Constant Flow Regardless of Differential Pressure
  • Wide Range of Control
RESTRICTOR CHEK
Lee Restrictor Cheks are miniature inserts available in metered Lohm rates from 1000 to 10,000 Lohms, and are screened to protect the orifice. Flow through the orifice creates pressure drop across the ball which moves it completely away from the seat. This unique design eliminates silting problems which occur whenever a restrictor is used in series with a check valve. Lee Restrictor Cheks maintain large minimum passageways for reliable performance.
Lee Restrictor Cheks are used wherever a metered Lohm rate is needed in one direction and no flow in the other. They are often used in lines that flow during operation and trap fluid upstream upon shutdown.
DIRECTIONAL FLOW CONTROLS
Lee Directional Flow Controls come in four different free flow Lohm rates to provide the designer with the optimum size insert. In addition, there are two sizes of High Pressure Directional Flow Controls. The Lee Directional Flow Control utilizes the full pressure drop across the restrictor to lift the moving element completely away from the seat in the free flow direction. When required, screens provide further protection from contamination in both flow directions.

Lee provides a wide range of designs to suit your needs. Use the following chart to select a model that matches your Lohm Rate requirements
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Directional Flow controls are ideal for timing applications where metering on the outlet in both flow directions is essential. As shown in the diagram above, the two flow controls maintain high back pressure when the actuator is moving in either direction, thus preventing cavitation.
FLOSERTS
Lee Floserts are pressure compensated flow controls which provide a constant flow over a wide range of pressure drop across the insert. The Flosert operates by sensing the flow rate in terms of a differential pressure across a fixed orifice. A variable metering orifice automatically adjusts to keep this pressure, and hence the flow rate constant. Thirteen flow rates from 0.1 to 1.0 GPM in a 0.281 inch diameter body (model 2), and eight flow rates from 1.5 to 5.0 GPM in a 0.500 inch diameter body (model 1) are available.
Floserts are useful for controlling the velocity of an actuator under varying loads. They can increase the stiffness of a hydrostatic bearing or limit the maximum flow rate to control the speed of a pump or motor. More than one Flosert will ratio flow or synchronize several jacks regardless of loads.
Datasheets
Hide details for [<br><hr SIZE=20><img src="RC.GIF"><big>] Restrictor Chek [</big><table><td>] Lee Restrictor Cheks are miniat
Restrictor Chek
Lee Restrictor Cheks are miniature inserts available in metered Lohm rates from 1000-10,000 Lohms, and are screened to protect the orifice. Flow through the orifice creates pressure drop across the ball which moves it completely away from the seat....
Ø.187" Restrictor Chek - Metered Flow
Hide details for [<br><hr SIZE=20><img src="FC.GIF"><big>] Directional Flow Control [</big><table><td>] Directional Flow contr
Directional Flow Control
Directional Flow controls are ideal for timing applications where metering on the outlet in both flow directions is essential. Use the above chart to help select size.
Ø.187" Directional - Flow Control Valves -
Ø.281" Directional - Flow Control Valves -
Ø.375" Directional - Flow Control Valves -
Ø.500" Directional - Flow Control Valves -
Ø.375" Flow Control Valves - High Pressure
Ø.375" Flow Control Valves - High Pressure Screened
Ø.500" Flow Control Valves - High Pressure
Hide details for [<br><hr SIZE=20><img src="FLOSERT.GIF"><big>] Flosert - Constant Flow Rate [</big><table><td>] Lee Floserts
Flosert - Constant Flow Rate
Lee Floserts are pressure compensated flow controls which provide a constant flow over a wide range of pressure drop across the insert.
Ø.281" Flosert 0.1 to 1.0 gpm range
Ø.500" Flosert 1.5 to 5.0 gpm range
For more information, please send us your application information via our ASK LEE service. Or contact our application engineers in the USA at 1-800-LEE-PLUG or our representatives around the world.
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