PRECISION MICROHYDRAULICS PRODUCT DATA SHEET The Lee Company's new 187 Zero Leak PRI (Pressure Relief Insert) is the latest addition to Lee's line of miniature zero leak pressure relief valves. This new valve is ideal for both pneumatic and hydraulic pressure relief applications where zero leakage is needed. The cracking pressure is preset at the factory with capabilities ranging from 20 psid up to 100 psid. The nominal weight is only 1.5 grams. Each Zero Leak PRI is 100% tested and inspected to ensure reliable, consistent performance. Please contact your local Lee Sales Engineer for assistance in solving your zero leak relief valve needs. ■ Cracking Pressure from 20 - 100 psid ■ Zero Leakage ■ Weighs only 1.5 grams ■ 100% Tested and Inspected ■ Endurance Tested to 100,000 Cycles Minimum LEE PART NUMBER FORWARD REVERSE Tool Set Part Number: CUTA1870110C Replacement Pin Part Number: CSFA1870003A Valve performance on Hydraulic Oil at ambient temperature. * The Lohm is a measure of flow resistance. Additional information can be found on the reverse side and at www.theleeco.com. Finish: All CRES Parts Passivated. Pins are prewaxed. Do not degrease. Do not lubricate. NOTE: The Lee Company 187 Zero Leak PRI is not recommended for general checked pressurization service. Excessive pressurization in the non-relief flow direction may cause damage to the valve's critical sealing surfaces. The Lee Company • 2 Pettipaug Road, PO Box 424, Westbrook, Connecticut 06498-0424 Tel: 860-399-6281 • Fax: 860-399-7037 • [email protected] • www.theleeco.com PDS 145 4/17

LOHMS LAWS (liquids) Every engineer will be interested in our simple system of defining the fluid resistance of Lee hydraulic components. Just as the OHM is used in the electrical industry, we find that we can use a liquid OHM or "Lohm" to good advantage on all hydraulic computations. When using the Lohm system, you can forget about coefficients of discharge and dimensional tolerances on drilled holes. These factors are automatically compensated for in the Lohm calculations, and confirmed by testing each component to establish flow tolerances. The resistance to flow of any fluid control component...