Aluminum Alloy Housing
Closer bodies are constructed of a special
aluminum alloy, carefully selected to
accommodate interactive steel components and operating conditions.
Rack & Pinion Operation
Provides a smooth constant control of the
door through its full opening and closing
cycle. 180° door swing can be achieved
when door, frame, hardware and arm
function do not interfere.
Non-handed
With few exceptions all series 8300/8500
and series 8301/8501 door closers are
non-handed and can be installed on either
right- or left-hand swing doors. Pinion
shaft extends vertically through the closer
body in both directions. Some options will require that the
hand of the closer be specified.
Sweep Speed Control Valve
Allows adjustment of door speed from the
door's full open position down to
approximately 10° from the closed position.
Latch Speed Control Valve
Allows adjustment of door speed from
approximately 10° down to the door’s
fully closed position.
Adjustable Backcheck Valve
Provides control of the door in the
opening cycle, beginning at approximately
75° of door opening. It cushions the door opening when the door is forcibly opened
beyond its pre-adjusted limits.
Standard Molded Covers
Molded of high-impact U.L. listed material.
These covers are non-handed for all
applications.
Warranty
Limited ten-year warranty for defects and
life of the building on the aluminum
housing.
Closer Fluid
NorGlide® closer fluid is a specially
formulated multi-viscosity hydraulic fluid
that contains lubricity and anti-oxidation agents that provide optimum
performance and efficiency. This fluid
complements the interaction of the door
closer's aluminum housing with its steel
and zinc components, while maintaining
stable viscosity to allow the door closer to perform in temperatures ranging from
extremely high to as low as -40° F.
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