Lee Co. (The) Datasheets for Flow Orifices and Flow Restrictors

Flow orifices and flow restrictors contain precision-machined holes and filters or screens to restrict flow and reduce pressure. They are available as stand-alone devices and in kits, assemblies, restrictors, and restrictor valves.
Flow Orifices and Flow Restrictors: Learn more

Product Name Notes
Axial Visco Jets incorporate multiple, spinner orifice discs in series to increase restriction or Lohm rate. Spinner discs alternately reverse the direction of spin of the fluid. The result is...
Lee 18 Series Visco Jets are multi-orifice restrictors that incorporate slots and spin chambers to form a complex fluid passage which provides a reasonable degree of viscosity compensation without the...
Lee 43 Series Visco Jets are multi-orifice restrictors in a cartridge style body and offer the highest standard restrictions up to 2.2 million Lohms. The 43 Series Visco Jets incorporate...
Lee 5K JEVA’s are multi-orifice restrictors that incorporate a high pressure locking end and all stainless steel construction, making it suitable for working pressure differentials up to 5,000 psi. Incorporating...
Lee 68 Series Visco Jets are multi-orifice restrictors in a cartridge style body. The 68 Series Visco Jets incorporate slots and spin chambers to form a complex fluid passage which...
Lee Bender Jets incorporate multiple orifices in series, with successive orifices on the centerline and displaced from it, to force fluid to “bend” as it passes through the unit. The...
Lee High Pressure 125 Visco Jets are compact, multi-orifice restrictors that incorporate a high pressure locking end and all stainless steel construction, making it suitable for working pressure differentials up...
Lee High Pressure 187 Visco Jets are multi-orifice restrictors that incorporate a high pressure locking end and all stainless steel construction, making it suitable for working pressure differentials up to...
Lee High Watt Jets are single orifice restrictors that provide accurate, screened, bidirectional flow in the 200 to 1,000 Lohm range. The integral screens are machined and drilled from bar...
Lee JEVA’s are multi-orifice restrictors that incorporate slots and spin chambers to form a complex fluid passage which provides a reasonable degree of viscosity compensation without the use of any...
Lee Kilowatt Jets are single orifice restrictors that provide accurate, screened, bidirectional flow in the 90 to 200 Lohm range. The integral screens are machined and drilled from bar stock...
Lee Micro Jets are precision calibrated orifices designed for flow balancing in liquid cooling applications where system pressures are below 500 PSID. Lohm rates range from 475 to 3,100 Lohms...
Lee’s highly accurate, miniature restrictor for gases is preinstalled in a male to female luer adaptor and features an integral safety screen to protect the orifice from contamination. Ideal for...
Lee’s highly accurate, miniature restrictor for liquids is preinstalled in a male to female luer adaptor and features an integral safety screen to protect the orifice from contamination. Ideal for...
Orifices of very high Lohm rates (very small hole diameters) are available in a barb to barb union as standards. Lohm rates of as high as five million lohms, equivalent...
The 156 Jet is a small, economical, and accurate single orifice restrictor. Each Jet contains a calibrated orifice, two matched safety screens so you can flow in both directions, and...
The 187 Jet is a small, economical, and accurate single orifice restrictor. Each Jet contains a calibrated orifice, two matched safety screens so you can flow in both directions, and...
The 2.5mm 303 Stainless Steel Press-in Orifice For Gases are reliable, highly accurate flow restrictors specifically designed for installation into plastic housings and fittings. Their unique barbed design provides easy...
The 2.5mm 303 Stainless Steel Press-in Orifice For Liquids are reliable, highly accurate flow restrictors specifically designed for installation into plastic housings and fittings. Their unique barbed design provides easy...
The 2.5mm 316 Stainless Steel Press-in Orifice For Gases are reliable, highly accurate flow restrictors specifically designed for installation into plastic housings and fittings. These orifices are constructed from all...
The 2.5mm 316 Stainless Steel Press-in Orifice For Liquids are reliable, highly accurate flow restrictors specifically designed for installation into plastic housings and fittings. These orifices are constructed from all...
The 2.5mm Brass Press-in Orifice For Gases are reliable, highly accurate flow restrictors specifically designed for installation into plastic housings and fittings and are intended for use on gases only.
The 2.5mm Insert Orifice For Gases is the smallest, self-retained restrictor available, allowing designers to save space and weight. This orifice is 100% flow tested on nitrogen to ensure that...
The 2.5mm Insert Orifice For Liquids is the smallest, self-retained restrictor available, allowing designers to save space and weight. This orifice is 100% flow tested on distilled water to ensure...
The 5.5 mm Insert Orifice For Gases are self-retained, reliable, highly accurate flow restrictors. All Orifices are 100% flow tested on nitrogen to ensure that every part is within ±
The 5.5 mm Insert Orifice For Liquids are self-retained, reliable, highly accurate flow restrictors. All Orifices are 100% flow tested on distilled water to ensure that every part is within...
The 5.5mm Air Bleed Orifice is a novel solution to removing trapped air in hydraulic systems while keeping hydraulic losses to a minimum. Utilizing a small precision flow orifice, the...
The 8.0 mm Insert Orifice For Gases are self-retained, reliable, highly accurate flow restrictors. All Orifices are 100% flow tested on nitrogen to ensure that every part is within ±
The 8.0mm Insert Orifice For Liquids are self-retained, reliable, highly accurate flow restrictors. All Orifices are 100% flow tested on distilled water to ensure that every part is within ±
The High Pressure 156 Bender Jet is a compact, multi-orifice restrictor that is suitable for working pressure differentials up to 5,000 psi. Incorporating a high strength locking end and all...
The High Pressure 187 Bender Jet is a multi-orifice restrictor that is suitable for working pressure differentials up to 8,000 psi. Incorporating a high strength locking end and all stainless...
The High Pressure 250 H Bender Jet is a multi-orifice restrictor that is suitable for working pressure differentials up to 5,000 psi. Incorporating a high strength locking end, drilled screens,...
The High Pressure 375 Bender Jet is a multi-orifice restrictor that is suitable for working pressure differentials up to 5,000 psi. Incorporating a high strength locking end and all stainless...
The High Pressure High Watt Jet is a single orifice restrictor that is suitable for working pressure differentials up to 5,000 psi (8,000 psi intermittent). This robust design includes a...
The Lee 5K Jet is a single orifice restrictor that is suitable for working pressure differentials up to 5,000 psi. This robust design is manufactured entirely from stainless steel, incorporates...
The Lee Micro Damp Visco Snubber has been specifically designed to provide pressure surge protection for hydraulic pressure transmitters, pressure switches and pressure gauges as required by AS 5440. The...
The NACE Compliant 250 H Bender Jet is a high pressure, multi-orifice restrictor that is suitable for working pressure differentials up to 5,000 psi. Constructed entirely from MP35N, a nickel-cobalt...