Valve Interlock TorkDrive
Smith Flow Control Introduces TorkDrive to Prevent Plant Shut-Down and Protect Plant Assets
Smith Flow Control launches TorkDrive, a device that can be mounted to either the valve input handwheel or directly to the valve input shaft to safeguard the valve from excessive torque.
TorkDrive has two distinct benefits. It prevents valve damage, thus reducing the need for expensive plant shutdown and valve replacement (through over-torque) and provides vital information regarding site maintenance requirements.
TorkDrive can increase valve life as it prevents the operator from applying excessive force when closing the valve, protecting the valve seat. TorkDrive controls the torque applied when operating a valve, ensuring that the same force is used regardless of the strength of the operator.
TorkDrive can be incorporated seamlessly into plant maintenance systems and schedules. TorkDrive is set to a predetermined maximum torque and, if during the operation cycle of the valve, the operating torque increases above the maximum limit, the TorkDrive will slip, indicating an irregular valve condition. This will alert the operator to report the valve status to Site Maintenance, rather than continue to apply force to the valve.
TorkDrive boasts a compact design, weighing less than 4kg, despite an all-mechanical construction. It is a completely maintenance free device, made from 316 Stainless Steel and is suitable for oil refineries, power plants, paper mills, water plants and chemical processing facilities. TorkDrive withstands temperatures from -56°C to +100°C, with a torque setting range from 80Nm – 500Nm. TorkDrive can be installed directly to manually operated valves, requiring torque monitoring over 80Nm (Ball, Gear, Gate & Globe etc). TorkDrive also benefits from IP65 protection, safeguarding the device in the most aggressive of environments.
TorkDrive features 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-500Nm. 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, thus ensuring that the correct torque range is always used.
TorkDrive comes complete with a tool for making fine adjustments.
The TorkDrive is supplied with bespoke adaptation to the host valve and its own operating handwheel/lever.