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Speed regulator - -40 °C ... +95 °C (-40 °F ... +200 °F)
These Viscous Speed Governors (VGS) are light but durable, and are appropriate for use in a wide variety of applications. These units use a silicone based viscous shearing technique to manage the rotation of shafts and hinged loads. The inner rotor is submerged in silicone fluid contained in the stationary housing, and during the shaft rotation the inner rotor shears through the viscous silicone, increasing resistance in promoting smooth operation. The degree of fluid viscosity is determined only after numerous variables have been taken into account, like the weight, size, spring assist, and anticipated cycle time. The unit is perfect for use with the rolling overhead and fire door control. When integrated into a retrofit, one VSG can be installed on a rolling door by mounting the unit to keyed door shaft according to the door's manufacturer specifications. The unit does not require adjustments during the install process or while in service in contrast to ratchet design systems. These units are able to govern the opening and closing speeds of a wide variety of large doors.