Friday, September 18, 2015

Pneumatic Actuator with 180 Degree Rotation for Your Multi-Port Valve

180 degree actuator
180 degree actuator
for multi-port valves.
So you need a pneumatic actuator with more than 90 degrees of rotation - most likely for a multi-port valve, or a custom louver or damper. Here's an excellent solution.

The simplicity and dependability of a 90 degree rotary vane actuator with a 2:1 step-up linkage mounted to the output shaft.

Kinetrol vane actuators provide factory fitted, direct mount linkage units for their models 02, 03, 05, 07, 09, 12, 14 and 16 actuators, giving a neat single unit with no mount kits or brackets. An added benefit is the linkage’s unique geometry gives constant 2:1 step-up, so that the output torque remains constant throughout the actuator's travel.

The all-steel mechanism of the linkage employs rolling contacts to minimize frictional losses and wear, and to maximize life. The linkage is lubricated for life, and encased in a robust, fully sealed die cast alloy casing. Exterior surfaces are protected by a corrosion resistant epoxy stove enamel finish. 

Standard adjustable end-stops on the 90 degree actuator can be used to set the angle of travel. The other end of the 90 degree actuator allows the full range of Kinetrol modular accessories to be fitted directly.

120 degree actuators are also available with adjustable end stops to give up to 133°.

Thursday, September 10, 2015

Keeping Critical Turbine Lubrication Flowing

Kinetrol actuator on lube skid
Lube filter diverters
(courtesy of Kinetrol USA)
Power plants generate power 24/7. Their generator turbines are constantly running.  Turbines require lubrication to protect against wear and also for cooling. Maintenance of the lubrication system is critical, and switching between two lube skids is a common way to perform maintenance without shutting down the turbine.

Two 3-way valves and pneumatic actuators are used to re-direct flow between between two lube filter housings. The valve and actuator must be extremely reliable as a failure requires the turbine shutting done.

Steam Turbine
Steam Turbine
(courtesy of Wikipedia)
The automated valves provides an “on-the-fly” ability to transfer turbine oil service between filters, allowing the unit to run, and maintenance to be performed on the filter not in service. This is an extremely critical service to protect the turbine.