Yale 51 Series
Grade 1 Surface Applied Multi-Sized Door Closers
51BF: Non-Hold Open Barrier Free

• Adjustable through the power range of sizes 1 through 4 to comply with the opening force requirements as outlined in the Americans with Disabilities Act (A.D.A.) and ANSI A117.1 for interior doors
• Tri-packed (regular arm, top jamb and parallel arm mounting)
• Non-handed
• Rack-and-pinion design
• Cast aluminum body
• 1-3/8" (35mm) diameter piston
• 5/8" (16mm) diameter pinion journals
• Standard, separate and independent, latch, sweep and backcheck intensity valves
• 2-7/8" (73mm) projection
• All standard arm applications allow doors to swing 180°, conditions permitting
• 10-year limited warranty
• Staked valves
  

Yale® 50 Series Closers are designed to fit almost any application and are the choice of engineers worldwide. They are ideal for use with aluminum store front doors and frames, yet they also complement wood or metal door installations. Non-handed, the 50 series is available as sized or multi-sized units and offers tri-packed packaging on standard non-hold open and hold open closers.

This UL listed, Grade 1 closer has a proven history of quality and tradition. With a variety of plates, brackets, precise valve adjustment and a complete range of arms, these closers can be used on retail stores, warehouses, restaurants, garages, or manufacturing and utility buildings.

COMPLIANCE STANDARDS
The series 51BF door closers are designed to comply with requirements of the Americans with Disabilities Act (A.D.A.) and ANSI standard A117.1. All series 51(BF) are ANSI/BHMA A156.4, Grade 1 certified.

All Yale® series 51(BF) closers with non-hold open arms are listed by Underwriters’ Laboratories for labeled fire doors. This includes compliance to UL10C and UBC-72 (1997) for 3-hour assemblies. These products are manufactured in a certified ISO 9001 facility. These closers are also listed by New York City Materials and Equipment Acceptance Division.

Standard Features
Aluminum Alloy Housing		Closer bodies are pressure cast of a special aluminum alloy, carefully selected to accommodate interaction with 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.
Closer Fluid		All door closers are supplied with a temperature stable, multi-viscosity fluid. This fluid will permit the door closer to perform within a wide temperature range from very high to as low as -40°F.
Non-Handed		With few exceptions all series 51 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. This permits the closer to be positioned on either right or left-hand doors for most applications.
Sweep Speed Control Valve		Allows adjustment of door’s speed from the doors 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.
Tri-Packed		51(BF) comes with screws, brackets & soffit plate to allow for regular, top jamb, & parallel arm installations.
Adjustable Backcheck Cushion Valve		Provides control of the door in the opening cycle, beginning at approximately 75° of door opening. It slows/cushions the door opening, when the door is forcibly opened beyond its pre-adjusted opening speed limits.
Optional Molded Cover		Molded of high impact U.L. listed material that covers the entire closer body assembly. This cover is nonhanded for all applications.
Warranty		These closers carry a limited ten-year warranty against defects and a limited lifetime warranty on the aluminum housing.

All closers with standard non-hold open and hold open arms are shipped with self-drilling/self-tapping and machine screws.

Optional Sex Nuts/Sleeve Nuts (SN)
SN are available for all closers and should be used on steel doors to prevent dimpling, or where proper door reinforcement has not been provided. Standard sleeve nuts are for 1-3/4" (44mm) doors. 

Optional Thru Bolts & Grommet Nuts (TBGN)
Through-bolts and grommet nuts (TBGN) are another fastener alternative for wood doors. Specify door thickness 1-3/4" (44mm), 1-3/8" (35mm), or 2-1/4" (57mm) when ordering.