Viscous Speed Governors (VSG) Innovation0 pages
Viscous Speed Governors (VSG)
nnnnVSG leads the expansion of our core
nnnnproduct offering
nnnnThe VSG's simple, lightweight rugged construction
nnnnprovides reliable performance for numerous industrial
nnnnapplications. The VSG controls rotation of shafts and
nnnnhinged loads by using silicone-based viscous shearing
nnnntechnology. An inner rotor is surrounded by silicone fluid
nnnnwithin the stationary housing. As the shaft rotates, the
nnnninner rotor shears the silicone fluid providing resistance
nnnnand smooth motion. Fluid viscosity of each VSG is selected
nnnnafter considering variables such as the
nnnncomponents size, weight, spring assist and desired
nnnncycle time.
nnnnCommon Applications
nnnn• Overhead and rolling steel fire doors, grilles,
nnnnand shutters
nnnn• Conveying - braking of free conveyor rollers and
nnnnramps
nnnn• Material Handling - hoist integration,
nnnnfree-fall load protection
nnnnSteering Control - resistance offers
nnnnover-steering protection
nnnn• Amusement Industry - limiting sway and
nnnnrange of motion
nnnn• Industrial Safety - controlling shaft or hinged loads
nnnnMarine Applications - 100% high-tech,
nnnnnon métairie construction
nnnnTypical VSG Application
nnnnLateral Motion
nnnnFeatures and Benefits
nnnn• Safely and quietly controls rotary motion
nnnn• Provides consistent speed control through
nnnn360° of rotation, in both directions
nnnnHandles linear motion via simple rack
nnnnand pinion integration
nnnn• Industry standard shaft and keyway
nnnnmounting configurations
nnnn• Wide range of ambient operating conditions - indoor
nnnnor outdoor, -40° F to +200° F (-40° C to +95° C)
nnnn• Customer-specified performance over a wide
nnnnrange of operating RPM
nnnn• Maintenance-free - no adjustments required
nnnn^ ITT
nnnnKoni
nnnnEnidine
nnnnTypical Shaft Installation
nnnnExploded View
nnnnRotor
nnnnKeyed
nnnnto Shaft
nnnnShaft
nnnnOuter Cover
nnnn■Housing
nnnnSilicone Fluid
nnnnIdeally suited for the Rolling Overhead
nnnnand Fire Door Control
nnnnIn new and retrofit applications, a single VSG can
nnnnbe installed on rolling doors by simply mounting to the
nnnnkeyed door shaft per the original door manufacturer's
nnnninstructions. Unlike noisy ratcheting devices, the VSG
nnnnrequires no adjustments during installation or while
nnnnin-service and can control the closing and opening
nnnnspeed of most large doors. Multiple governors can
nnnnbe used to handle over-sized doors.
nnnnCurrently in use by most major door manufacturers,
nnnnthe patented VSG meets industry standards outlined
nnnnby Underwriters Labratory, Warnock Hersey and
nnnnFactory Mutual. It has passed the 3-hour fire door
nnnnburn test and conforms to numerous
nnnnindustry standards.
nnnnEME
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