33A and 33ATD, Vacuum Relief Valves
Piping System Components
Vacuum Relief Valves
CLA-VAL COMPANY, Costa Mesa, United States of America
Costa Mesa, United States Of America
33A and 33ATD
Product Description
Series 33A: High Performance Air Release & Vacuum Breaker Valve., Series 33ATD: Air Release & Vacuum Breaker Valve (Threaded & Flanged) with Throttling Air Control Device., Material of construction: Ductile Iron ASTM A536 65-45-12, ASTM A216WCB, ASTM B61 Naval bronze, ASTM B148 NI Aluminum Bronze, 316 Stainless Steel, Duplex Stainless Steel and Super Duplex Stainless Steel., Seals: Nitrile, Rubber, EPDM.,
Product Ratings
Models: 33A and 33ATD | Sizes: 2", 3" & 4" | Max. Pressure Rating for UL Listed 33ATD = 300 psi | Orifice (2"): 0.076" | Orifice (3" & 4"): 0.125" | Temperature Range: Water up to 180F |
Applicable Standards
UL2573 (2017) - Outline of Investigation for Automatic Air Release, Air/Vacuum and Combination Air Valves for Fire Protection Service