Milwaukee Valve CompanyButterball Slo-Close BB-SC Series Fire Sprinkler Valves. Provides slow opening and closing properties in a quarter-turn valve. Now available in “low lead”. They are rated for indoor and outdoor use, are available with or without an internal, prewired, supervisory tamper switch assembly. They have a switch rating of 10 Amps/115 VAC-80 Hz, .5 Amps/28VDC, and UL/FM ratings to 175 psi (Also available at 350 psi and 500 psi with N.Y.C.B.S.A. approval).
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