TorkDrive – a torque limiting device which prevents valve damage
Smith Flow Control’s TorkDrive is a unique device which prevents manual valves from being damaged due to excessive torque application during valve operation. It can be customised to suit most manufacturers’ handwheel operated valves (Ball, Gear, Gate & Globe, etc.) where valves require a torque monitoring of over 80Nm.
The device is set to a predetermined maximum torque and, if during the operation of the valve, the operating torque increases above the pre-set limit, the TorkDrive will slip, indicating an irregular valve condition. Following over-torque, the TorkDrive unit will automatically reset to the predetermined torque.
TorkDrive is a customisable add-on tool which minimises the risk associated with unavoidable plant/process shutdown and unnecessary repair costs through valve over-torque. It can be specified as a simple, standalone unit mounted on either the valve input handwheel or directly to the valve input shaft; or it can be used in conjunction with SFC’s EasiDrive portable valve actuator, a non-impacting, air driven power tool designed to simplify valve operations.
Features of the TorkDrive include unique clutch plates that are controlled by a series of calibrated compression springs. Two spring set configurations are available: a low range TorkDrive unit offering a maximum torque output range between 80Nm – 280Nm and a high range unit offering 250Nm – 420Nm. Each unit is factory set before installation and the unit can be adjusted to suit the host equipment’s torque requirements using a calibrated setting scale within the body of the device. Each spring set has a unique colour code, ensuring that the correct torque range is always used.