Lined Pipe Insert Style - LP

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Lined Pipe Insert Style - LP

The Lined Pipe Insert (LP) 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.

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Nominal Size Size Code A B C D* O.D. Orifice
Dia.**
PTFE HC
1 H 0.590 1/4 0.26 0.26 0.53 2 0.348
1-1/2 J 1.120 1/4 0.46 0.42 0.78 2-7/8 0.593
2 K 1.570 1/4 0.79 0.44 1.01 3-5/8 1.135
3 M 2.520 5/16 0.77 0.66 1.43 5 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
    3" 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.

    Size Cv
    1 2.4
    1-1/2 6.1
    2 18.8
    3 32.0

    P
    R
    E
    S
    S
    U
    R
    E

    D
    R
    O
    P

    P
    S
    I

    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 Other Options Allowable Seat Materials Other Options Standard Cracking Pressures Other Options More Info. Standard Spring Material More Info.
    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

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