Vacuum Flange Insert Valve Style - VI

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Vacuum Flange Insert Valve - VI

The Vacuum Flange Insert (VI) valve is designed to fit between ISO/NW/KF/QF vacuum flanges designed in accordance with DIN 28403, DIN 28404, ISO 1609, and ISO 2861. It is both a centering ring and a check valve. The compact design requires no additional space in the line. Its size makes it extremely economical when compared to full-bodied valves.
The VI valve can also be used as a low pressure relief valve under either positive or vacuum conditions by using the desired spring setting.

 

NOTE: USP Class VI o-rings can be supplied with certification.

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NOTES (DIMENSIONS TABLE)
*Maximum nominal dimension for a fully open valve with no spring. Consult factory for more information.

View VI Dimensions in PDF format

DN Size Code DIM A DIM B DIM C DIM D Orifice Diameter
16 F 0.665-0.669 0.31 0.52 0.62 0.348
25 H 1.020-1.023 0.35 0.57 0.87 0.464
40 J 1.611-1.614 0.67 0.82 1.37 0.890
50 K 2.044-2.047 0.87 1.00 1.87 1.135

 

  • 316 Stainless Steel (SS)
  • Body Material Availability Non-Shock Pressure-Temperature Rating
    316 Stainless Steel (SS) Standard FULL VACUUM-ATMOSPHERIC @ 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
    16 2.4
    25 4.6
    40 9.5
    50 20.9

    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.

    DN PART NUMBER ALL MATL
    16 VIFSS 0.7 oz.
    25 VIHSS 1.6 oz.
    40 VIJSS 4.1 oz.
    50 VIKSS 7.0 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.
    VI 3/4" - 1-1/2" 316 SS
    AFLAS®
    EPDM
    "Metal to Metal"
    PTFE
    Buna-N
    Kalrez®
    Neoprene
    Viton®
    1/8 PSI
    1/2 PSI
    1.5 PSI
    3.5 PSI
    316 SS
    VI 2" 316SS
    AFLAS®
    Buna-N
    EPDM
    Kalrez®
    "Metal to Metal"
    Neoprene
    PTFE
    Viton® 
    1/8 PSI
    1/2 PSI
    1.5 PSI
    316 SS

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