LCN Green Dial to take the guesswork out of spring power adjustments. Patent-pending positive stop to improve staking and prevent the screw from being backed out. Patent-pending regulation valve indicators that add a visual reference for screw adjustment location.
Labeled regulation valves and diagram of door swing to make adjustments faster, easier and consistent. Cast iron cylinder for rugged performance, longer life and maximum control. Single-piece, heat-treated forged steel arms to withstand bending and breaking.Heat-treated 1-1/2 diameter piston for extra hardiness and strength. Double heat-treated steel pinion with 11/16 journal diameter for greater wear-resistance.
Full complement bearings with minimum 0.5 height that wear more evenly and are less susceptible to leakage. All-weather Liquid X fluid for consistent performance through every season, regardless of temperature changes. Independent speed adjustments for greater door control. Non-PRV (pressure relief valve) design to minimize risk of property damage, injury, increased maintenance and liability exposure.
Redesigned snap-fit cover with patent-pending retention fit. Powder coat finish that lasts longer than spray lacquer.
Universal non-handed design that enables it to fit more applications with a single product. Full ranges of mount and arm options, including hinge pull side, push side top jamb and push side parallel arm.
Non-sized cylinder is adjustable for interior doors to 5'0" and exterior doors to 4'0". UL and cUL listed for self-closing doors without hold-open. Tested and certified under ANSI/BHMA A156.4 Grade 1. 4040XP may be used with all 4040 accessories.Non-handed, non-sized, delayed action and accessibility options available.