You can tell the difference by looking at the pictures above.
Heavy duty door closer with dead stop.
Door closer closer type.
Arrow dc516 3 door closer heavy duty dead stop hold open arm surface mounted this is a commercial door closer that meets the requirements of ansi a156 4 and ansi icc a117 1.
They are used on fire doors to help prevent the spread of flames and smoke in the event of a fire.
The yale 5821t door closer heavy duty parallel arm dead stop hold open with thumbturn surface mounted heavy duty commercial closer the yale 5821 t features adjustable spring sizes 1 6 5821 t closer is non handed javascript seems to be disabled in your browser.
If you want an even better solution get a heavy duty closer with a spring assisted dead stop.
Featuring heavy duty construction for superior strength and wear resistance the 351 series powerglide door closer is ideally suited for highly trafficked environments like schools healthcare facilities and office and commercial buildings.
Heavy duty closer arms are often made of forged steel and are extremely durable.
180 degrees arm type.
The yale 2721 t has a holder stop arm incorporate a stop at the arm s soffit plate to dead stop the door at a predetermined degree of door swing between 85 and 110 in 5 increments.
Ansi bhma a156 4 grade 1 finish.
Tri pack standard closing operation mode.
Dead stop door closers 2 products door closers pull doors closed once they ve been opened and released.
The yale 2721t door closer heavy duty parallel arm dead stop hold open is a surface mounted commercial door closer.
As the door approaches the full open position the closer arm hits the spring.