Ø .250" Zero Leak Chek


    The Lee Company's new 250 Zero Leak Chek is the latest addition to Lee's line of miniature, zero leak check valves. Available in forward and reverse flow configurations, the new Lee Chek uses an elastomeric seat to achieve zero leakage. The remaining components are constructed entirely of stainless steel. This new valve flows over 62 SLPM (air) at 25 psid, yet has a diameter of only 0.250". Nominal weight is just 3.8 grams.

    Each Lee Chek is 100% tested and inspected to ensure reliable, consistent performance.
    • Designed for system pressures up to 3000 psi
    • Zero Leakage from 5 - 3000 psid
    • Small Size: 0.250" diameter x 0.80" long
    • Weighs only 3.8 grams
    • 100% Tested and Inspected


Locking Pin and Insert




Free Flow Forward





Free Flow Reverse






Installation Hole







PERFORMANCE
  • Cracking Pressure: 5 ± 3 psid.
  • Leakage in Checked Direction: Zero bubbles in a one minute test at 5 - 3000 psid.
  • Free Flow: 180 Lohms max. restriction when fully open.
  • Nominal System Pressure: 3000 psi max.
  • Nominal Weight: 3.8 grams.
(Valve performance on air at room temperature)

MATERIALS
PART
MATERIAL
SPECIFICATION
Body
304 CRES
AMS 5639
Poppet
15-5PH CRES
AMS 5659
Seat
304 CRES
AMS 5639
Spring
17-7PH CRES
AMS 5678
Pin
17-4PH CRES
AMS 5643
Elastomeric Seat

Each valve contains one
of the following elastomeric materials.
Fluorocarbon
AMS-R-83485 or
AMS-R-83248
EPDM
AMS-R-83285
Finish: All CRES Parts Passivated
Pins are prewaxed. Do not degrease. Do not lubricate.

INSTALLATION AND EXTRACTION
Tool Set Part Number is CUTA2500506C
Replacement Pin Part Number CKFA2500005A
For Installation and Extraction Procedures, Tools and Oversize Spare Parts, follow this link

LEE PART NUMBER
CRACKING PRESSURE (PSID)
LOHM RATE (MAX.)
SEAT MATERIAL
FLOW DIRECTION
CSRA2506005A
5 +/- 3
180
Fluorocarbon
Reverse
CSFA2506005A
5 +/- 3
180
Fluorocarbon
Forward
CSRA2506105A
5 +/- 3
180
EPDM
Reverse
CSFA2506105A
5 +/- 3
180
EPDM
Forward

Download a PDF file of the Product Data Sheet
For more information, please send us your application information via our ASK LEE service. Or contact our application engineers in the USA at 1-800-LEE-PLUG or our representatives around the world.
Copyright 07/2008 by The Lee Company, USA
-- Trademark information --
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