Aunspach Controls Company introduces the Model D80 water treatment valve overtorque clutch, which prevents valve damage caused by excessive operating torque in treatment plant operations. The clutch is mounted between the hand wheel and manual or electric actuator. Operating torque is transmitted from the hand wheel through the D80 to the actuator without damaging torque; further hand-wheel rotation resets trip torque. The mechanisms are permanently lubricated and hermetically sealed, corrosion protected by fusion-bonded epoxy with enamel topcoat and stainless steel fasteners. No maintenance required. Units are shipped pre-calibrated and ready to mount.