375 Bypass Valve
The new Lee 375 Bypass Valve is designed to shunt flow across an actuator piston when the system pressure is either shut off or lost. The 375 Bypass Valve is normally open device, with a hydraulically-actuated pilot-to-close feature.
This miniature valve weighs only 16 grams and is designed for 4000psi systems. The metal components are constructed entirely of stainless steel for durability and long life. Each Lee Bypass Valve is 100% tested and inspected to ensure reliable, consistent performance.Further information
250 PRI Pressure Relief Valve
The new 250 PRI pressure relief valve is the latest addition to Lee’s line of miniature pressure relief valve inserts. This new valve is ideally suited for low flow hydraulic applications where a miniature, light weight pressure relief valve is needed. The 250 PRI is only 1.1 inches long and weighs only 4.5 grams. A Lee Safety Screen is incorporated at the inlet of the valve for protection.
Available in forward and reverse relief flow configurations, the 250 PRI is available in a wide range of standard cracking pressures from 80 to 3600 psid, and is constructed entirely of stainless steel for durability and long life. Each 250 PRI is 100% tested and inspected to ensure reliable, consistent performance.Further information
500 High Pressure Flosert
The new Lee High Pressure 500 Flosert is pressure compensated to provide a constant flow over a wide range of pressure differentials. This new valve is ideal for high pressure hydraulic applications with system pressures up to 5000 psi. Nominal weight is just 32 grams. Available in forward and reverse regulated flow configurations, the High Pressure 500 Flosert is constructed entirely of stainless steel for durability and long life. Regulated flow rates are available from 1.5 to 5.0 GPM. Each Flosert is 100% tested and inspected to ensure reliable, consistent performance.Further information
Hi-Q Pressure Relief Valve
The Hi-Q Pressure Relief Valve is designed for applications that require both a high relief pressure and a high flow rate in a compact package. This new relief valve is capable of relief pressures up to 5400 psid and 19 USGPM. The valve utilizes a side inlet flow path to help minimize the installation boss size and weight. The Hi-Q Pressure Relief Valve is offered in a range of cracking pressures from 1,000 to 5,400 psid and is designed for use with nominal system pressures up to 5,000 psi and peak pressures up to 6,750 psi.Further information
NACE Compliant 15,000psi Check Valves
The new range of Lee check valves has been specifically designed for the harsh duty applications found in the Oil Tool Industry such as chemical injection. They are constructed entirely of corrosion-resistant materials that are compliant with NACE specification MR0175/ISO 15156. These check valves feature a durable MP35N poppet and seat and they have been designed for checked direction pressures up to 15,000 psid. The NACE Compliant High Pressure Check Valves are available in free flow forward and free flow reverse directions, with cracking pressures of 5±3 and 1±0.5 PSID in sizes from 0.125" to 0.500" in diameter.Further information
Quiet Operation 3 Way Solenoid Valve
The Lee Company’s new Quiet Operation High Density Interface (HDI) is a 3-way solenoid valve designed to achieve patient comfort by reducing actuation noise by 50%. A typical solenoid valve has an inherent clicking sound when energized, which is caused by the metal-to-metal contact of the moving armature and stationary core. This new quiet operation design uses “whisper” technology to provide a sound level measurement of less than 37 dBA when measured at a distance of 24 inches and a valve cycle frequency of 10 Hz. Available in face mount, plug-in and ported configurations, the Quiet Operation HDI is ideal for medical applications flowing gas or air, such as dialysis machines, patient monitors, ventilators/respirators and other bedside medical devices.Further information
Lo Lohm HDI Solenoid Valve
The Lee Company’s High Density Interface (HDI) solenoid valve has been improved by offering more flow capacity without sacrificing size and weight. The Lo Lohm HDI solenoid valve provides the features of a large valve coupled with the superior performance of a miniature valve in one compact design. A spike and hold voltage drive is used to achieve an extended flow and pressure range. Performance parameters can be optimized for a specific application.Further information
Manual Override Solenoid Valve
A new solenoid valve has been developed which has a manual override capability for typical applications in engine cowl door systems and cargo door actuators on commercial aircraft and in rotor blade fold units on military helicopters. Currently available in a single coil normally closed configuration for 4,000psig systems, the valve can be designed with single or dual coils in normally closed or normally open configurations for operation in 3,000 or 5,000 psi systems .
Atomizing Nozzles Offer Precise Spray Pattern
The new atomizing nozzles, available in both airless and air-assisted styles, generate a 50-degree hollow cone spray pattern and offer precise, controlled atomization in a compact package. The airless atomizing nozzles do not require an external air supply and will atomize with pressures as low as 20 psi (on water).
Available in multiple flow ranges, the nozzles can be installed directly onto a proprietary VHS micro-dispense solenoid valve for precise flow control using pulse-width modulation (PWM).
The air-assisted nozzles utilize an external air source to control the atomization, allowing lower operating pressures (5 psi). The pressure of the liquid and air can be independently controlled to fine-tune the flow rate and nozzle performance.
Atomizing nozzles with special mounting configurations and PEEK wetted materials are available upon request.Further information
093 Check Valve
The 093 check valve is an ultra miniature side-exit check valve. Weighing only 0.14 grammes nominal, the 093 Lee Chek offers a 90% weight saving over the 187 version and is 50% shorter, resulting in a corresponding reduction in installation boss size and weight. Available in a forward flow configuration, the new Lee Chek is constructed entirely of stainless steel and features a hard, metal to metal seat for durability and long life.
NACE Compliant Pressure Relief Valve
The 0.281 inch diameter Pressure Relief Valve is now available made from corrosion-resistant materials that are compliant with NACE specification MR0175 / ISO 15156 to suit harsh duty applications such as those found in the oil tool industry.
Standard valves are available in forward and reverse flow directions with cracking pressures from 80 to 5,900 psid. Custom models are also available with cracking pressures as high as 12,000 psid.Further information
156 Bender Jet
The new 156 Lee Bender Jet is a miniature, lightweight multi-orifice restrictor. Weighing only 1.1 grams nominal, the 156 Bender Jet offers a 21% weight savings over the 187 Bender Jet and is 17% smaller in diameter, resulting in a corresponding reduction in installation boss size and weight. Using the same field-proven technology as our other Lee Bender Jets, the 156 Bender Jet incorporates multiple orifices in series to lower fluid velocity and reduce the possibility of cavitation. The multi-orifice configuration also provides a larger minimum passage for a given Lohm rate to increase resistance to contamination. Designed to meet the requirements of 5,000 psi systems, 156 Bender Jets are offered in eight standard Lohm rates, ranging from 1,900 to 9,500 Lohms, and are protected with two integral safety screens for bidirectional flow capability. In addition, each Bender Jet is 100% flow tested to ensure accurate, consistent performance.Further information
Wash Down Nozzles
A new range of micro wash down nozzles for washing cuvettes, test tubes, 96 well plates and other similar laboratory receptacles as well as purging / drying gas chambers, has been developed. They are constructed from 303 and 304 stainless-steel and the nozzles are 6 in. long, feature a 0.062 Minstac fitting at one end and have a total restriction of 1800 Lohms.
Two versions are available, one with ten 0.010” diameter holes and one with twenty 0.007” diameter holes to ensure an ultrafine spray which is ideal for delicate, yet effective wash down in critical areas. However, it is intended to produce a version with forty 0.005” diameter holes in the future. Various lengths are available on request, as are specials to suit specific applications.
High Pressure 187 and 281 Directional Flow Controls
The new 187 and 281 High Pressure Flow Controls are the latest addition to Lee’s line of miniature directional flow control valves that provide restricted flow in one flow direction and free flow in the other direction. The valves are ideal for high pressure hydraulic applications with system pressures up to 5,000 psi. The valves incorporate high strength safety screens for both flow directions. Available in forward and reverse free flow configurations, the new High Pressure Directional Flow Controls are constructed entirely from stainless steel for durability and long life. Metered Lohm rates are available from 1000 to 20,000 Lohms.Further information
Technical Hydraulic Handbook - Edition 11
Edition 11 of the Technical Hydraulic Handbook is now available and provides engineers with a valuable reference for the wide range of Lee fluid control components. The new handbook contains detailed engineering data and specifications for plugs, restrictors, flow controls, nozzles, check valves, relief valves, shuttle valves, solenoid valves, filter screens and includes many new products. Among the new products featured are the 3 way , high flow solenoid valve, the 250 series solenoid valve, zero leak check valves, high pressure bender jets, Hi-Bar inlet screens and etched safety screens. Accompanying the handbook is a CD which contains a fully indexed PDF file of the hard copy book with a link to The Lee Company website.
The Lohmolator (Hydraulic / Pneumatic Slide Rule)
The Lohmolator is a useful slide rule device which can be used to calculate the Lohm rate (ie orifice size) of a restrictor or a valve for a given flow rate and pressure drop on fluids or gases.Further information
5k Flareless Tube Safety Screen Adapter
The 5k Flareless Tube Safety Screen Adapter integrates The Lee Company’s field proven HI-BAR screen into a new Ring Locked Adaptor design. Compared to conventional flareless tube Ring Locked Adapters rated for 4000 psi, this flareless adapter design can handle system pressures up to 5080 psi. This is a perfect match for the robust Lee HI-BAR Safety Screens which are rugged enough to withstand pressure differentials up to 7500 psi without burst or collapse. The Lee HI-BAR Safety Screens are machined entirely from 15-5PH stainless steel while the adapter is manufactured from lightweight 6AL-4V titanium. The 5k Flareless Tube Safety Screen Adapters are available in -4, -6, -8 and -10 configurations and meet both of the latest aerospace specifications, AS5550 and ABS0993. Seven standard hole sizes ranging from 0.002” (50 micron) to 0.020” (500 micron) in diameter are available. Special custom designs are available upon request.Further information
High Pressure Air Charging Valve
The Lee High Pressure Air Charging Valve provides a reliable manually operated valve that facilitates the charging or bleeding of a high pressure gas system. The valve is constructed from a combination of 15-5 PH and 300 series stainless steel components and has nitrile rubber o-rings with Teflon back-up rings for sealing and support. The valve is actuated by manually turning a nut that jacks the valve stem open or closed against a metal-to-metal, bubble-tight seat. Charging is done by removing the stem cap and connecting a gas source to the stem end. The design also incorporates an audible safety feature that warns the user of unreleased air pressure when the valve is being removed from its installation boss Designed for 5000 psi pressure vessels, the Lee Air Charging Valve is a light-weight version offered in a smaller overall package than similar designs on the market today. This valve weighs just 34.5 grams compared to 47.6 grams for competitive designs. It comes with mounting threads for use with AS5202-05 standard ports and has been qualified per MIL-PRF-6164 test requirements. Special custom designs are available upon request.
VHS Injection Manifold Mount System
The Lee VHS Injection Manifold Mount System allows for the precise injection of fluid into a flow stream. Using this system, any ported Lee VHS micro-dispense valve can be mounted so that the outlet port is in close proximity to the flow stream, thus minimising captive capillary volume and increasing injected volume repeatability. Lee VHS valves are high-speed, two-way solenoid valves that have set the standard in applications requiring microliter and nanoliter dispense volumes. One, two, three and four place standard manifolds are available. For greater design flexibility and to allow for future expansion, boss plugs are available to seal any unused ports in the manifold. Valves and plugs can be installed and removed repeatedly. Custom manifolds designs and materials are also available.Further information
High Pressure Flange Mount Safety Screens
The etched screen product line has been expanded with the introduction of High Pressure 17-7PH Flange Mount Safety Screens. These new screens take advantage of the higher strength material properties of 17-7PH stainless steel to provide burst and collapse pressures which average more than two times those of existing 304L designs. The 17-7PH screens are completely interchangeable with the existing etched, flange mount product line and use the same field-proven configuration to provide maximum open screen area for increased dirt holding capacity. The 17-7PH Flange Mount Safety Screens are available in 7 different flange sizes ranging from 0.130" to 0.656" diameter with screen hole sizes of 0.004", 0.006", 0.008" and 0.015" diameter.Further information
375 High Pressure Relief Valve
The 375 High Pressure PRI is a relief valve designed for optimal performance in applications with high backpressure. This new relief valve has shown stable relief flow performance in applications with backpressures up to 850 psig. The 375 High Pressure PRI offers a range of cracking pressures for 3000, 4000 and 5000 psi systems with system peak pressures up to 6750 psi. Featuring a durable tungsten carbide ball and 440C CRES seat, the relief valve weighs only 20 grams and is 100% tested and inspected to ensure reliable, consistent performance.Further information
440C Lo-Lohm Check Valve
A new version of the Lo-Lohm check valve is now available that has been specifically designed for optimal performance in harsh duty applications. Constructed entirely of corrosion-resistant stainless steel, the new 440C Lo-Lohm check features a durable 440C poppet and seat, which provides longer cycle life and increased resistance to damage from contamination, resulting in improved overall system performance. Available in forward and reverse directions in sizes from 0.187 to 0.500" diameter with cracking pressures of 5 +/- 3 and 1 +/- 0.5 psid. Custom check valves can be designed in MP35N for applications in severely corrosive environments.Further information
281 Zero Leak Pri
The new 281 Zero Leak Pri pressure relief valve is ideal for thermal relief and low flow hydraulic pressure relief applications where zero leakage is required. Cracking pressures are available from 1300 to 4700 psid and typical flow rates range from a few millilitres per minute for thermal relief applications and up to 250 mL/min for low flow pressure relief applications.Further information
Variable Volume Pumps
A new brochure detailing the range of miniature dispense pumps has now been published. The pumps are available in three types, high and standard performance LPV models, along with LPL solenoid pumps, in a range of full stroke volumes from 50 µL to 3000 µL.
These pumps, which are an ideal alternative to conventional syringe or peristaltic pumps, combine a compact, lightweight design, with low power consumption so they can be located wherever fluidic requirements dictate, regardless of maintenance accessibility.
They are designed for consistent, repeatable performance, with a CV as low as 0.04% at full stroke, volume resolution as small as 0.04 µL. Thanks to the use of chemically inert construction materials, Lee pumps are maintenance-free, providing users with the assurance of a reliable operating life of 5,000,000 cycles minimum.
The range provides engineers with optimum flexibility as the high performance LPV models combine speed, size and accuracy with small dispense volumes from 0.04 up to 1.0 µL and pressures to 95 psi, the standard LPV models offer the same reliable, repeatable performance on a smaller scale, with dispense volumes from 0.01 up to 1.5 µL and pressures to 15 psi, while the LPL solenoid models enable consistent, fixed volume dispensing from 50 up to 130 µL (depending on configuration).
Lee pumps are ideal for a wide range of automated liquid handling applications such as systems for in-vitro diagnostics, scientific instrumentation, drug discovery, or wherever high precision, reliable fluids transfer is needed, on a miniature scale.Further information
Series 300 Micro Inert Valve
The new Series 300 Micro Inert Valve is a 2 way, normally closed solenoid valve that facilitates higher packing density, enabling more valves to be positioned in the same area, resulting in smaller manifolds and therefore a smaller footprint. The LFN centre-to-centre spacing is 0.3" (compared to 0.5" for the previous LFV valve). These valves can also contribute to savings on material, for example, if engineered plastics such as PEEK, are used for the manifold. Other benefits include less transport volume thanks to closer spacing which results in reduced length of the connection passages in the manifold. This can reduce the amount of reagent needed, whilst also reducing the transport time of a sample. The LFN valve has a low internal volume of just 13 microlitres and so reduces the amount of fluid needed which contributes to lower eagent volume and faster throughput. The LFN valve also features a faster response time (20mS) and a lower power consumption (900W) than the LFV micro inert valve.Further information
375 Bender Jet
The 375 Lee Bender Jet® is a low Lohm, multiple-orifice restrictor designed for systems with high flow rates and large pressure drops. With a minimum passage of .070” or greater, the 375 Bender Jet offers over three times the cavitation resistance of a comparable single orifice restrictor and virtually eliminates any possibility of clogging.
Designed to meet the requirements of 5,000 psi systems, the 375 Bender Jet meets aerospace standards for an unscreened restrictor and is offered in six standard Lohm rates ranging from 125 to 375 Lohms.Further information
Check Valves for Industrial Gas Turbines
Ideal for use in purge air, water injection and liquid fuel applications, Lee’s new Power Generation Chek® Valves are field serviceable, allowing the user to disassemble and service the valve using a rebuild kit. Available with or without a removable, washable Hi-Bar® Safety Screen, the check valves are designed according to specific customer requirements and can operate at temperatures up to 450 F.
Featuring low leakage and high flow, each Power Generation Chek Valve is 100% tested and inspected to ensure reliable, consistent, long term performance.
3 Way High Flow Solenoid Valve
The new miniature 3-way High Flow Solenoid Valve offers dramatic space and weight savings as well as high reliability and performance. Available in a single coil configuration, the compact valve weighs just 4 ounces and uses only 7.8 watts at 28 vdc. Operating pressure is 3,000 psi, and minimum flow at that pressure is 4.0 USGPM (300 Lohms).
A unique plunger design and innovative materials in the magnetic circuit result in a miniature, low power consumption solenoid with an unusually efficient force/stroke relationship. The use of the patented Lee Multi-Seal enables the hydraulic portion of the valve to be extremely small and compact. This new sealing technology eliminates conventional O-rings and back-up rings, and radically simplifies port layout by allowing two ports to be sealed in the same axial plane.Further information
Lee Micro-Dispense Nozzles provide a convenient method of accurately controlling dispensed volumes when used in conjunction with VHS Micro-Dispense Solenoid valves. Designed for applications where the volume of liquid to be dispensed is in the microlitre to nanolitre range, these new nozzles are available in two different configurations for system design flexibility: 062 MINSTAC threaded ends and straight tube. In addition to the standard stainless steel dispensing nozzles, a limited number of Teflon coated nozzles are available. The Teflon coating helps to prevent hanging drops at the end of a dispense .Further information
Sub-Miniature Latching Solenoid Valve
The new sub-miniature latching solenoid valve is specifically designed for applications that demand ultra-low power, low heat and small size. These features make the valve ideal for compact, battery powered pneumatic instruments such as portable oxygen delivery systems, environmental gas samplers, and other OEM flow switching devices. The new valve is magnetically latched and requires only momentary (10 ms) pulses of current to switch the state. It consumes only 2.8 milliwatt-sec per switch and has reliable bi-stable performance. Available in plug-in, face mount and ported soft tube configurations, the valve measures just 1.12" long x 0.28" diameter for compact manifold applications. The latching valve also features a flow capacity of 6 slpm at 10 psig and a pressure range of 0-15 psig.Further information
High-Speed Solenoid Valves for Micro-Dispensing
Now available from Lee Products is the VHS micro-dispensing valve. This high-speed (1,200 Hz), two-way solenoid valve is designed for applications where size, dispense volume, repeatability and reliability are extremely important. The small size (0.22" diameter) allows placement of the valve directly over the individual well centers of standard 96 well micro-titre plates.
The VHS micro-dispensing valve is available with either a standard (0.05") or small (0.02") diameter outlet port or with an integral jeweled orifice for direct dispensing. The valve also features low power consumption (500 mW maximum) and a 200,000,000 cycle life. Wetted materials include stainless steel, PEEK, PPS and EPDM, ensuring a high level of chemical resistance and a wide range of fluid compatibility.Further information
A.F.O. Plug (Axial Force Only)
The A.F.O. Plug provides a leak-tight, metal to metal seal in high pressure, high temperature manifold applications. Designed to be both removable and reusable, the plugs feature a floating seal that self-aligns to allow for threaded holes that are not concentric with the through hole. As a result of the plugs' two-piece construction, the seal does not rotate during installation, thus preventing galling of the seat. Also, since all the force is contained in the axial direction, the boss diameter can be smaller compared to other designs of plug.
Standard A.F.O. plugs are manufactured from corrosion resistant 303 and 15-5PH stainless steel and do not require O-rings or sealants. They are designed to withstand pressures up to 56,000 psi and temperatures to 600F, when fitted into hard materials and can be used in softer materials as well, such as aluminium or plastic.
The plugs are available in sizes from .190" to .750" with UNF threads, however, depending on specific application requirements, special versions can be supplied. A.F.O. plugs have recently been supplied in Monel in sizes up to 1,325" UNF threads to withstand 15,000 psi working pressure and 22,500 psi proof pressure.
A.F.O. Plugs are typically used in the offshore oil industry where applications include subsea wellhead trees, tubing hangers, completion tools, slick joints and down hole tools.
A range of NACE compliant A.F.O. Plugs made from MP35N is also available. These plugs conform to the requirements of NACE MRO175 / ISO 15156 and offer exceptional resistance to corrosion and sealing performance in high pressure, high temperature applications .Further information
Miniature 2-Way High Flow Solenoid Valve
The Miniature 2-Way High Flow Solenoid Valve is a two stage version of the existing Lee piloting solenoid valve, capable of flows up to 6.0 USGPM at a pressure of 3000 psi. It is available in single and dual coil, normally open and normally closed models. The valves provide superior performance and low power consumption applications where weight and space is critical.
The standard valves are configured with leadwires for 18 - 32 Vdc, - 65 to + 275 F but a custom design capability is also available to provide special connectors, different voltages and higher temperatures.Further information
Semi-Inert Solenoid Valve
The semi-inert LHIX Series solenoid valve is specifically designed to handle moderately aggressive liquids and gases in a wide range of fluid handling applications. The key features of these compact LHIX Series valves are light weight and low power consumption. This makes them ideal for use in inkjet printing, gas detection devices, anesthesia and reagent delivery systems, in addition to other similar OEM flow switching applications. Other features include enhanced elastomer inertness using (FFKM / PFE) elastomers and low internal volume.
The valves weigh less then 4.5 grams, measure just 1.12" OAL x 0.28" in diameter and operate with low power consumption of just 550 mW. Flow rates on gases for the 2 way option are; 11 LPM @ 10 psig and for 3 way; 6.6 LPM @ 10 psig. Latching and non-latching designs are available.
To ensure optimum design flexibility LHIX valves are available in plug-in, face mount and ported soft tube configurations. In addition to the FFKM and PFE elastomers, the wetted materials of the valves are; PPS (plunger head), PBT (housing), 316 CRES (spring), Epoxy, along with Lee's alloy for the armature and plunger stop which ensures superior corrosion resistance for more demanding.Further information
Series 250 Solenoid Valve
The 250 Series Solenoid Valve is a 2 position, 3-way miniature piloting solenoid valve featuring Lee's unique and patented MultiSeal technology which radically simplifies port layout by allowing total porting flexibility 360 degrees around the seal. The valve is available in normally open and normally closed models, weighs only 0.1 pounds and power consumption is just 7.2 watts at 12 Vdc.Further information
World's Smallest Solenoid Valve
The Lee Series 120 Solenoid Valve is an ultra-miniature, magnetically latched, two way solenoid valve, featuring high performance flow switching characteristics. Weighing just 300 mg, the valve requires only a momentary 1 ms pulse to switch the state (+5 VDC to open, -5 VDC to close) and is ideal for compact battery powered pneumatic applications such as air piloting, lab automation (lab-on-a-chip) and other power-sensitive OEM flow switching devices. The Series 120 Solenoid Valve is only 0.12" O.D. x 0.40" long but will flow 1 SLPM of air at 5 psid and features reliable bi-stable performance and quiet operation.Further information
A.F.O. Plug with an O Ring
A new version of the AFO (Axial Force Only) plug has been designed to incorporate an O ring for additional sealing in specialised Oil Tool applications. The plug is designed to vent air from a product when filling it with hydraulic oil or to release trapped high pressure gas from an activated down-hole pyrotechnic tool when brought to the surface. Secondary retention of the plug in the manifold is provided by a circlip which prevents the plug from being removed completely from the manifold, thus safely protecting the operator during the gas venting process.Further information
Hi-Bar Inlet Safety Screen
The Hi-Bar Inlet Safety Screen product line offers a new alternative for inlet filter screen design. Space and weight are minimised by incorporating the inlet screen into a fitting, rather than the more traditional approach of having the screen installed in the manifold directly below the fitting. This unique design also offers greater flow and dirt holding capacity than a design that completely encapsulates the screen in the fitting. The safety screens are machined entirely from 15-5PH and are available in -4, -6 and -8 configurations (AS33514 flareless tube to AS930 port fitting ends which can be installed into a standard boss per AS33649. Six standard hole sizes ranging from 0.003" (75 micron) to 0.020" (500 micron) diameter are available and the screens are rugged enough to withstand pressure differentials up to 6,000 psi without burst or collapse.Further information