New models added to Valvekits’ gearbox menu

The scope for valve gearboxes available from valve adaption specialist Valvekits has been increased with the addition of a new model and the enlargement of an existing range. Both new developments are manufactured by Rotork Gears and designed for the operation of gate valves, globe valves and penstocks. Both will be available from Valvekits workshops in the UK and USA.

The robust and cost-effective new HOB/MPR range of bevel gearboxes is available in eleven body sizes to deliver a torque output range of 380 to 8018 Nm. The corresponding thrust range is 54 to 1557 kN, facilitating the hand operation of a broad range of valve sizes.

The totally enclosed, maintenance free gearing has been designed with carefully chosen ratios to maintain user-friendly handwheel rim effort across the range. Manufactured with cast iron gearcases, ductile iron baseplates and zinc plated fasteners, the new range has been life-tested to ensure that maximum performance, reliability and quality is consistently maintained. Standard ambient operating temperature range is -40ºC to +120ºC, with other ranges optionally available.

Further options include increasing the IP67 watertight environmental enclosure to temporarily submersible IP68, local position indicators, two speed input reducers, two or three input shafts at 90º and 180º configurations, flexible extensions, special coatings for aggressive environments and a Firesafe trim conforming to ISO10497.

In the second new development, the introduction of the IS21 gearbox adds higher thrust ratings to an established range of multi-turn, thrust taking spur gearboxes. Retaining most of the parts from the IS20, the IS21 incorporates a new F60 cast ductile iron thrust base, thrust bearings, spigot ring and output sleeve, featuring a removable output sleeve for separate spindle machining. The resulting thrust rating rises to 4350 kN for manual operation and 2900 kN for motorised operation, an increase of 30% over the previous maximum. Corresponding maximum output torques rise to 46100 Nm and 43386 Nm respectively.

Like the HOB/MPR, the standard IP67 watertight and enclosure can be optionally increased to IP68, whilst the standard operating temperature range of -40ºC to +120ºC can also be expanded to suit specific high or low temperature demands.

The totally enclosed gearing is grease filled for life and available in a wide range of ratios. The option of combined spur and bevel gear combinations adds even more operational flexibility. The addition of the IS21 to the existing range enables the gearboxes to be used for the manual or motorised operation of the largest valves to be seen in markets including water and waste treatment, power generation, petro-chemicals and general industry.

Rotork Valvekits
Tel: 01623 440211
Email: sales@rotorkvalvekits.com

Published: 25th February 2015