The Lee Company's new 50 Zero Leak Chek uses an elastomeric seat to achieve zero leakage.

The Lee Company new 250 Zero Leak Chek® is the latest addition to Lee’s line of miniature, zero leak check valves.  According to the company, the valves feature:

• Availability in forward and reverse flow configurations.
• Use of an elastomeric seat to achieve zero leakage. 
• Remaining components constructed entirely of stainless steel. 
• Flow over 62 SLPM (air) at 25 psid.
• A diameter of only 0.250”.  Nominal weight is just 3.8 grams.
• 100% testing and inspection to ensure reliable, consistent performance.  Maximum working pressure of 3,000 psid.