Series 20/21 , Ball Valves & butterfly valves

Piping System Components

Ball Valves & Butterfly Valves

Series 20/21

Product Description

Resilient Seated Butterfly Valves Series 20 wafer or Series 21 lug , Size Range:1" - 20" (25mm - 500mm), Body Materials: Cast Iron (A126 Class B), Ductile Iron (A395 Gr. 60-40-18), Stainless Steel (A351 CF8M, Aluminum (B26 Class B), Disc/Stem Materials: Stainless Steel, EPDM Molded over SS, BUNA-N Molded over SS, Seat Materials: BUNA-N, EPDM, PTFE Lined EPDM, FKM, Polyurethane.

Product Ratings

Temperature Range:-20F to 400F (-29C to 204C) | EPDM: -20F to 250F (-29C to 121C) | BUNA-N: 0F to 212F (-18C to 100C) | FKM: 0F to 400F (-18C to 204C) | Polyurethane: -20F to 176F (-29C to 80C) | | Pressure Ratings: Bidirectional Bubble-tight Shutoff: 150 psi (10.3 Bar), Body (CWP): 150 psi (10.3 Bar) | All Resilient Seated Series 20 and Series 21 Valves (with Standard Disc): Metal Disc-Stem 1-20 (25mm-500mm) 150 psi (10.3 Bar), Resilient Molded Disc 2-20 (50mm-500mm) 100 psi (7.0 Bar) | All PTFE Seated Series 20 and Series 21 Valves (with Standard Disc): Metal Disc 2-20 (50mm-500mm) 150 psi (10.3 Bar), PTFE Molded Disc 2-20 (50mm-500mm) 100 psi (7 Bar)

Applicable Standards

ISO 5752 (1982)
ISO 5211 (2017)

ANSI B16.5 Class 150 (2017)
ANSI B16.1 Class 125 Table 2 (2015)
ANSI B16.10 Table 9 (2017)

N/A