Description
The Lined Pipe Insert (LP) spring check valve is designed to mate between two flanges on most lined pipe systems. It provides the simplest most economical way to install a check valve in a lined piping system. No gaskets are required; just spread the flanges, center the valve and bolt the flanges together. LP valves are available in fluoropolymer (PTFE/FEP/PFA) and Alloy C-276 to satisfy the most demanding applications. The standard spring material is Alloy C-276. Other materials are available upon request.
| Nominal Pipe Size | Size Code | A | B | C | D** | O.D. | Orifice Dia.** |
|---|---|---|---|---|---|---|---|
| 1 | H | 0.590 | 1/4 | 0.26 | 0.26 | 0.53 | 0.348 |
| 1-1/2 | J | 1.120 | 1/4 | 0.46 | 0.42 | 0.78 | 0.593 |
| 2 | K | 1.570 | 1/4 | 0.79 | 0.44 | 1.01 | 1.135 |
| 3 | M | 2.520 | 5/16 | 0.77 | 0.66 | 1.43 | 1.555*** |
NOTES (DIMENSIONS TABLE)*Maximum nominal dimension for a fully open valve with no spring.
**Orifice Diameter for PTFE valve may vary due to molding process.
***3" PTFE valves use 1.385 Orifice Diameter.Consult factory for more information.
- Alloy C-276 (HC)
- PTFE (TF)
| Body Material | Nominal Pipe Size | Non-Shock Pressure-Temperature Rating |
|---|---|---|
| Alloy C-276 (HC) | 1" - 3 " | ANSI Class 150/300 |
| PTFE (TF) | 1" - 2 " | 55 PSIG @ 100 °F |
| 2 | 20 PSIG @ 100 °F |
Seat material and spring material selection may limit the recommended service temperature.
See seat ratings, spring ratings, and body material ratings for their respective recommended service temperatures.
Consult the factory for reduced P-T rating above 100 °F. Standard spring material is 316 Stainless Steel.
PRESSURE DROP PSI
| Size | Cv |
|---|---|
| 1 | 2.4 |
| 1-1/2 | 6.1 |
| 2 | 18.8 |
| 3 | 32.0 |
FOR WATER AT 72°F
WATER FLOWRATE - GPM
Note: All flow curves and Cv values presume the valves are fully open with 1/2 PSI cracking pressure springs. Consult the factory for more information.
| SIZE | PART NUMBER | METAL | PTFE |
|---|---|---|---|
| 1 | LPH | 4.0 oz. | 1.0 oz. |
| 1-1/2 | LPJ | 8.8 oz. | 2.2 oz. |
| 2 | LPK | 14.4 oz. | 3.2 oz. |
| 3 | LPM | 2.3 lb. | 9.0 oz. |
Valve weights are approximate.
| Valve Style | Size Range | Body Materials | Allowable Seat Materials | Standard Cracking Pressures | Standard Spring Material |
|---|---|---|---|---|---|
| LP | 1" - 3" | PTFE | AFLAS® EPDM "Metal to Metal" Buna-N Kalrez® Neoprene Viton® | 1/2 PSI | 316 SS |
| LP | 1" - 3" | Alloy C-276 | AFLAS® Buna-N EPDM Kalrez® "Metal to Metal" Neoprene PTFE Viton® | 1/2 PSI | 316 SS |
For additional information about Check Valves
What is a Silent Check Valve?
What is a Spring Loaded Check Valve?
What is a Poppet Check Valve?
