Showing posts with label vane actuators. Show all posts
Showing posts with label vane actuators. Show all posts

Friday, October 26, 2018

Upper Midwest Water Treatment Plant says "Out with the old, in with the new!"

water treatment valves
Before project.
water treatment valves
Project begins.
An Upper Midwest water treatment plant was experiencing high failure rates, long maintenance periods, and too many repair issues with their existing pneumatic scotch-yoke cylinder valve operators. 

Upon investigation, the problem boiled down to how the scotch-yoke cylinder's linear movement is converted to rotational movement. To do so requires gearing, yokes and linkage which are wear points. In medium to high cycle rate applications these wear points soon become failure points

Kinetrol rotary vane actuators utilize a single moving part - the one-piece vane and shaft.  There are no gears, yokes, or linkages and 100% of the movement is transferred to the actuator shaft. The one piece vane and shaft eliminates these wear points, and therefore eliminates the resulting failure points.

water treatment valves
Out with the old.
water treatment valves
In with the new.
After a planning review meeting, this particular water treatment plant clearly saw the advantages of the Kinetrol design. The argument was so strong and the case so clear,  they decided to replace all (60) scotch-yoke cylinder actuated valves with Kinetrol vane actuators in one fell swoop. 

The new actuators have been operating for 6 months now without problem, cycling approximately 15 times per day. 

Click on the images above to see a larger view. For more information, contact Kinetrol USA by visiting https://kinetrolusa.com or by calling 972-447-9443

Saturday, September 29, 2018

Kinetrol Actuators Stand Up to Tough Iron Foundry Environment and Very High Cycle Rate

high cycle exhaust valve
Kinetrol on high cycle valve.
A iron foundry located in the Midwest asked the local Kinetrol distributor to help him replace a failing rack and pinion actuator on a on a very high cycle exhaust valve. The environment was very hot and dirty and the actuator cycles approximately 100,000 times per month, which is about 1.3 million per year. Also, the valve has to open in a fraction of a second.

The rack and pinion actuator was replaced with a Kinetrol vane actuator and the customer's problem disappeared. The Kinetrol actuators have performed for over 2 years now without problem.

Click on any of the pictures for a larger view.

high cycle exhaust valve

high cycle exhaust valve



Sunday, November 27, 2016

Kinetrol Spring Return Units: Spiral Torsion Springs Are Key

Spiral torsion spring
Simple view of spiral
torsion spring (protruding
tab and hex center
are loading points.)
Spiral torsion springs are found in many places - clocks, watches, timers ... and Kinetrol spring return units!

Capable of storing much more energy than a typical compression spring, and working in smaller, more compact packages, spiral torsion springs for valve and damper actuation are a proven step-up over helical compression springs.

When a torque is applied to a spiral torsion spring, an angular displacement is created between the first and second loading points, the coil deflects (tightens), and the spring material is placed under stress, exerting a linear (to the degree of rotation) rotational "output" torque,  which drives the spring's rotation. Practically speaking, spiral torsion springs allow for lower torque loss, lower torque stress, and much greater reliability for use in valve and damper actuation.

Kinetrol Spring Return
Kinetrol Spring Return Unit
(note cutaway revealing
spiral torsion spring.)
Along with the inherent advantages of spiral torsion springs, additional benefits of the Kinetrol spring return unit are:

  • Separate housing for modular assembly, easily retrofitted
  • Sealed, non-breathing housing: Protects spring in corrosive environments
  • Adjustable pretension for 'balanced' air and spring stroke torques: Various combinations available for balanced / optimized torques at various air pressures
  • Keeper plates available to ensure safe handling of pretensioned springs
  • Available with ISO/DIN female drive and mounting
The combination of the spiral torsion spring reliability plus the advanced engineering design allow Kinetrol to offer a guarantee against failure of the spring unit for the lifetime of the mating actuator!

For more information, contact Kinetrol USA by visiting www.kinetrolusa.com or calling 972-447-9443.