The Lee Company offers a range of specialized products. These components may not be as widely used as our plugs, for example, but they’ve proven vital for unique applications such as robotics, remote underwater vehicles, and other sensitive applications. These include rupture discs, peak pressure recorders, PRI/check valves, air bleed orifices, and products in plastic fittings. Like all Lee products, these components are tested under a rigorous quality management system, and designed for high reliability, allowing them to stand up against demanding applications.
Lastly, The Lee Company deals heavily in custom products. All the components below are adaptable to the needs of your specific application, allowing you to create a product that functions as it was designed.
The Lee Burst-Sert™ rupture disc is a single-use isolation device designed to seal a passageway or volume until the rated burst pressure is exceeded. Until that point, it provides a reliable, leak-tight seal in a compact, corrosion-resistant package. Once the burst disc ruptures, a flow passage as large as 0.25 of an inch (12 Lohms*) is created to relieve excess pressure or allow flow to and/or from the isolated system. Burst pressures are available from 3000 to 15,000 psid with a 10% tolerance. Operating temperatures up to 450°F are available.
Manufactured from Incoloy® 825 and Inconel® 625, the Burst-Sert incorporates The Lee Company’s field-proven controlled expansion principle, which ensures retention and prevents any bypass leakage without the use of threads or elastomeric seals. These are perfect for system isolation or instrument protection.
If your equipment fails, you’ll want to understand why. Often, a hydraulic system will fail due to unpredictable shifts and spikes in pressure within a unique environment. For example, a failure may be unavoidable if a spike exceeds a tool’s maximum rated pressure. Using a peak pressure recorder, you can understand whether a pressure pulse occurred, even if it was simply a momentary occurrence too small to be noticed by conventional methods.
The Lee Kipster® Peak Pressure Recorder is a mechanical device that records peak pressure in a hydraulic system. The component contains a pressure-sensitive disc that deforms as a function of peak pressure. Although this device does not replace sophisticated transducers, it offers a simple, economical means of measuring peak pressure and a compact package that can be installed where electronic transducers can’t.
Lee Kipsters are available in three models that span the pressure range from 4000 psi to 30,000 psi with an accuracy of up to ± 3%. The pressurization rate has been shown to have little effect on the Kipster’s accuracy of up to 50,000 psi/sec. Above this rate, some drift may occur. If the pressure rise rate is repeatable, the drift is consistent within a given part number up to 2,000,000 psi/sec.
Lee PRI®/Chek® Valves combine the function of a reverse flow pressure relief valve in parallel with the function of a check valve with free flow in the forward direction into one easily installed insert. The relief valve function features a rugged Tungsten Carbide ball and a 440C seat for durability and long life. The remaining components are constructed entirely of stainless steel. The valves are available in a range of relief flow cracking pressures for system pressures up to 5000 psi.
The 281 PRI/Chek Valves are available with or without integral safety screens. The unscreened version has a maximum restriction of 300 Lohms in the free flow direction and is available in nine different standard relief flow cracking pressures up to 3600 psid. The screened version has a maximum restriction of 550 Lohms in the free flow direction and is available in 15 different standard relief flow cracking pressures up to 5900 psid. The 375 PRI/Chek Valve has a maximum restriction of 220 Lohms in the free flow direction and is available in seven different standard relief flow cracking pressures up to 5400 psid.
Improve hydraulic performance with Air Bleed Orifices from The Lee Company. These components are used to remove trapped air from hydraulic systems, increase system responsiveness, and improve reaction times. While traditional air bleed methods involve drilling a hole in the hydraulic manifold to allow the trapped air to escape back to the sump, this method also results in a continuous and significant hydraulic fluid loss. Instead, our components utilize a small precision flow orifice that allows trapped air to escape but is small enough to restrict most hydraulic flow, minimizing system losses. Our 5.5 mm diameter Air Bleed Orifices are offered in forward and reverse flow directions and contain an integral locking end for secure retention and sealing without threads, O-rings, or sealants. Both models contain integral safety screens for contamination protection.
The Lee Company offers a wide range of components – such as precision flow orifices, check valves, relief valves, and safety screens – pre-assembled in many common medical fittings such as male to female Luer adapters, barb-to-barb unions, and tee fittings. Each fitting is made of medical-grade polypropylene, and the pre-installed Lee component is made of all stainless steel. All fitting assemblies are 100% functionally tested to ensure that each part meets its performance requirements. Ordering our components in plastic fittings helps to reduce both costs and assembly time while improving your product quality.
Partner with The Lee Company and get much more than just a supplier of top-quality fluid control products. Our reliable technical support team is available every step of the way to help you find solutions, maximize productivity, and drive efficiency across your operations. Check out these resources tailored to your industry to learn more.
Always verify flow calculations by experiment.
Always verify flow calculations by experiment.
*There are many parameters to consider when determining V-Factor. Click here for more information.