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Chemical Technology • August 2015
FOCUS ON PUMPS AND VALVES
ANOTHER WARMAN ® Warman ® pumps work hard. NewWarman ® pumps work even harder. Like theWarman ® WBH ® pump, designed to run even more efficiently and be even more reliable than the legendaryWarman ® AH ® pump in heavy-duty process, feed and tailings applications. Which means even greater productivity and even greater profits. So whether you’re upgrading, or you just need another pump, your choice is easy,Warman ® . To find out more visit theresonlyonewarman.com Minerals weirminerals.comManufacturing advancements underpin en-
hanced sizing flexibility for AUMA’s part-turn
GS gearboxes. Three duty classes, (1, 2 and
3), have been introduced to support all an-
ticipated operations across predicted valve
lifetimes. The new classifications, paired
with the introduction of additional flange
sizes, enable the company’s GS gearboxes
to be mounted on larger valve flanges.
AUMA GS gearboxes play a key role auto-
mating large scale butterfly and ball valves:
the company’s established range caters for
torques between 500 to 675 500 Newton
metres. Comprehensive product revisions
undertaken by AUMA encompassing cor-
rosion protection, surface treatment of
metals, enhancement of connection tech-
nologies and selection of optimal lubricants
have improved themechanical properties of
the gearboxes and given AUMA a platform
to reassess permissible torques.
With no binding standard for valve
gearboxes, AUMA continues to adhere to
EN 15714-2, which defines high lifetime
requirements for actuators. EN 15714-2
specifies a sophisticated load profile for type
tests and lifetimes up to 10 000 operation
cycles, depending on the device’s size.
AUMA’s rigorous test procedures confirm
that its devices exceed these standard
requirements.
The lifetime specifications of the stan-
dard are the basis of AUMA’s newly intro-
duced duty class 1 gearbox. For duty class
2, assuming infrequent operation, 1 000
duty cycles is assumed: this increases the
permissible gearbox torque by 25 percent.
In these instances, smaller and more cost-
efficient gearbox sizes can be selected to
suit the customers’ applications. Duty class
3 is adopted for manually operated gear-
boxes enabling higher torque levels due to
extremely infrequent operations.
For more information visit
www.auma.comz
AUMA part-turn gearbox now has enhanced flexibility for sizing
GS gearboxes are frequently combined with
AUMA actuators.