Body Construction - ASTM A 351 Gr. CF8 / CF8M

Disc - AISI 304 or AISI 316 (Bar Stock)

Spring - AISI 304 or AISI 316 (Standard)

Spring Retainer - AISI 304 or AISI 316

Disc Seat - Metal to Metal

Pressure Rating - PN 40.

Flange Standard -

1. BS 10 Table D, E & H (65NB & 80 NB will not be fitted between ‘E’ flanges)

2. DIN : Pn6, 10, 16, 25, 40.

3. JIS 5, 10, 16, 20 (40NB, 50NB, 80NB & 100 NB will not be fitted between JIS 5 flanges )

_{‍Opening Pressures in mbar}

Different pressures with zero flow for standard and high temperature springs

_{→ Indicates Flow Direction}

Where lowest opening pressures are required, valves without springs can be installed in vertical pipes with bottom-to-top flow.

_{Without Spring}