The BONOMI EXME531S SERIES 531S EPOXY COATED CAST IRON BODY ST. ST. DISC VITON SEATS BUTTERFLY VALVE AND VALBIA CSA APPROVED EXPLOSION PROOF ELECTRIC ACTUATOR is a 2-way, rubber lined lug-style butterfly valve with stainless steel disc and Viton seats. It is suitable for HVAC, water, and air applications.

The valve has an ISO 5211 direct mount/square stem, epoxy coated ductile iron lug body with stainless steel disc, VITON seats (10°F TO 300°F), API609 face to face flange, floating dual shaft disc design, MSS SP 67 compliant, and no pins in disc to prevent potential leak points. It is also NSF/ANSI 61, 372 approved.

The electric actuator has a NEMA 4x, 7, 8 & 9 (CSA Approved) enclosure, IP68 with explosion-protected performance and 1/2” FNPT conduit connection, temperature range of 22°F to 158°F, clutch-less manual override, thermostatically controlled anti-condensation heater, self-locking gear system, ON/OFF (00*) or 4~20 mA MODULATING (02*) options, 30% Duty Cycle (ON/OFF) and 75% Duty Cycle (MODULATING), ISO 5211 Mounting Bolt Pattern and DIN 3337 Double Square Drive, ± 5° Mechanical stop on 0° and 90°, continuous mechanical position indicator, built-in thermal overload protection, and 2 auxiliary SPDT switches.