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The Lee Company now offers its field-proven Lo-Lohm Chek valve in a version that is specifically designed for optimal performance in harsh duty applications. Constructed entirely of corrosion-resistant stainless steel, the new 440C Lo-Lohm Chek 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 flow directions, the new valves save space and weight, and offer high flow capability relative to their compact size. Sizes range from 0.187" to 0.500" in diameter, with free flow Lohm rates from 100 to 12 Lohms. Available cracking pressures are 5 +/- 3 and 1 +/- 0.5 psid. Each Lee Chek is 100% tested and inspected to ensure reliable, consistent performance, eliminating the need for additional in house testing. Custom check valves can be designed using MP35N for applications in severely corrosive environments.
- Designed for system pressures up to 4000 psi
- Durable 440C CRES poppet and seat
- 4 standard sizes
- 100% tested and inspected
- Custom, NACE compatible models available
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Pin and Insert
Installation Hole
| .187 DIA. CHEK | .250 DIA. CHEK | .375 DIA. CHEK | .500 DIA. CHEK |
| Æ D | 0.1867 - 0.1874 | 0.2492 - 0.2499 | 0.3742 - 0.3749 | 0.4992 - 0.4999 |
| M | 0.62 | 0.78 | 1.20 | 1.50 |
| Æ K | 0.15 | 0.21 | 0.33 | 0.46 |
| L | 0.16 | 0.14 | 0.26 | 0.31 |
| A | 0.64 Minimum | 0.80 Minimum | 1.22 Minimum | 1.52 Minimum |
| Æ N | 0.130 - 0.140 | 0.185 - 0.195 | 0.296 - 0.306 | 0.415 - 0.425 |
| Æ Ream | 0.1875 - 0.1880 | 0.2500 - 0.2505 | 0.3750 - 0.3755 | 0.5000 - 0.5010 |
Free Flow Forward
Free Flow Reverse
PERFORMANCE
- Cracking Pressure: 5 ± 3 psid or 1 ± 0.5 psid
- Maximum Leakage in Checked Direction: 1 drop/minute at 5 psid; 1 drop/hour at 1000-4000 psid
- Free Flow: 100 to 12 Lohms max. at 15 psid and greater
- Nominal System Pressure: 4000 psi max.
(Valve performance on MIL-PRF-83282 at 85 °F. 1 drop = 50 mL)
MATERIALS |
PART | MATERIAL | SPECIFICATION |
Body | 304 CRES | AMS 5639 |
15-5PH CRES | AMS 5659 |
Pin | 17-4PH CRES | AMS 5643 |
15-5PH CRES | AMS 5659 |
Spring | 17-7PH CRES | AMS 5678 |
Poppet | 440C CRES | AMS 5630 |
Seat | 440C CRES | AMS 5630 |
Finish: All CRES Parts Passivated
Pins are prewaxed. Do not degrease. Do not lubricate.
INSTALLATION AND EXTRACTION
Tool Set Part Number is CUTA1870110C
Replacement Pin Part Number CKFA1870005A
For Installation and Extraction Procedures, Tools and Oversize Spare Parts, follow this link
LEE PART NUMBER | CRACKING PRESSURE (PSID) | MAXIMUM LOHM RATE | FLOW DIRECTION | NOMINAL SYSTEM PRESSURE (PSI MAX) |
CKFA1876605A | 5 +/- 3 | 250 | Forward | 4000 |
CKFA1876601A | 1 +/- 0.5 | 250 | Forward | 4000 |
CKRA1876605A | 5 +/- 3 | 250 | Reverse | 4000 |
CKRA1876601A | 1 +/- 0.5 | 250 | Reverse | 4000 |
CKFA2506605A | 5 +/- 3 | 50 | Forward | 4000 |
CKFA2506601A | 1 +/- 0.5 | 50 | Forward | 4000 |
CKRA2506605A | 5 +/- 3 | 50 | Reverse | 4000 |
CKRA2506601A | 1 +/- 0.5 | 50 | Reverse | 4000 |
CKFA3756605A | 5 +/- 3 | 24 | Forward | 3000 |
CKFA3756601A | 1 +/- 0.5 | 24 | Forward | 3000 |
CKRA3756605A | 5 +/- 3 | 24 | Reverse | 3000 |
CKRA3756601A | 1 +/- 0.5 | 24 | Reverse | 3000 |
CKFA5006605A | 5 +/- 3 | 12 | Forward | 3000 |
CKFA5006601A | 1 +/- 0.5 | 12 | Forward | 3000 |
CKRA5006605A | 5 +/- 3 | 12 | Reverse | 3000 |
CKRA5006601A | 1 +/- 0.5 | 12 | Reverse | 3000 |
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 08/2008 by The Lee Company, USA
-- Trademark information --
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