Mfg date: nov. 2009. For severe duty, abrasive slurry applications. Ductile iron astm a536 body; 316 stainless steel gate; field replaceable urethane liner; 10" double acting pneumatic cylinder with dual coil solenoid valve, proximity switches, and locking ball valve. All pre-wired to fiberglass terminal enclosure. Actuator fail position: fail in place los/fail in place loa.