Low Temperature Shutoff (Pneumatic); Model 135-B,Brass Head,Bronze Thermal Element; Opt-64: O-Ring Insertion Seal With Set Screw Locking Groove; Br/SST/Cu Internal Trim,Fluorosilicone (Fk) Seals,SST Spring Washers,;Invar Rod; Setpoint Calibration,+15 Deg F Full Open; Opt-55: Cleaned For Oxygen Service Per Spec #S-1134