Manual Override (MOR)

ALIS Valves offers Manual Override (MOR) units designed to enable manual operation of automated valves when pneumatic or electric actuation is unavailable or manual intervention is required. A Manual Override mechanism is typically installed with a compatible actuator or valve assembly and allows an operator to operate the valve using a handwheel, lever or gearbox, depending on the design. This provides an alternative method of valve operation during maintenance, commissioning, troubleshooting or temporary loss of the normal power or air supply. Manual Override units are available in configurations suitable for compatible quarter-turn or multi-turn valve applications, with mounting interfaces and mechanical arrangements selected according to the actuator type, valve torque requirements and installation conditions.

Manual Override units are used in industrial automation, water treatment, chemical processing, oil and gas facilities, power generation and other applications where continued access to valve operation is important. They can be specified for compatible pneumatic or electric actuator assemblies, depending on the product design. Important selection factors include actuator type, valve size, required operating torque, mounting standard, gearbox ratio, available operating space and the frequency of manual operation. Buyers should also verify whether the override mechanism disengages automatically or requires manual disengagement before returning to powered operation. Correct installation and operation are essential to prevent mechanical damage and ensure safe switching between manual and automatic modes. Selecting the appropriate Manual Override unit helps provide operational flexibility, support maintenance activities and enable controlled valve operation when the primary actuation method is unavailable.