TorkDrive – a torque lim­it­ing de­vice which pre­vents valve dam­age

DEMM Engineering & Manufacturing - - PUMPS & VALVES -

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.­quiry #151025.

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