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Check-All Series UNSW Seat Materials & Cracking Pressure
| Valve Style |
Size Range |
Body Materials |
Allowable Seat Materials |
Standard Cracking Pressures |
Standard Spring Material |
| UN-SW | 3/8”-1¼” | 316L
SS |
VITON® Buna-N Neoprene TEFLON® resin KALREZ® EPDM "Metal to Metal" |
1/8 PSI ½ PSI 1.5 PSI 3.5 PSI |
316 SS |
| UN-SW | 3/8”-1¼” | C. Steel | VITON® Buna-N Neoprene TEFLON® resin KALREZ® "Metal to Metal" |
1/8 PSI ½ PSI 1.5 PSI 3.5 PSI |
316 SS |
| UN-SW | 1½”-4" | 316L
SS |
VITON® Buna-N Neoprene TEFLON® resin KALREZ® EPDM "Metal to Metal" |
1/8 PSI ½ PSI 1.5 PSI |
316 SS |
| UN-SW | 1½”-4" | C. Steel | VITON® Buna-N Neoprene TEFLON® resin KALREZ® "Metal to Metal" |
1/8 PSI ½ PSI 1.5 PSI |
316 SS |
| UN-SW | 3/8”-4” | Alloy
20 HASTELLOY® C |
VITON® Buna-N Neoprene TEFLON® resin KALREZ® EPDM Metal to Metal |
½ PSI | HASTELLOY® C |
| UN-SW | 3/8”-4” | MONEL® |
VITON® Buna-N Neoprene TEFLON® resin KALREZ® EPDM "Metal to Metal" |
½ PSI | MONEL® |
| UN-SW | 3/8”-4” | HASTELLOY® B | VITON® Buna-N Neoprene TEFLON® resin KALREZ® EPDM "Metal to Metal" |
½ PSI | HASTELLOY®
B or |
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