Automatic Door Bottoms - Handed Surface & Semi-Mortice Models
Automatic Door Bottoms - Handed Surface & Semi-Mortice Models
About Door Bottoms (DB)
About Automatic Door Bottoms
Automatic door bottoms consist of an aluminum case which surrounds a movable drop bar seal. The drop bar seal is actuated by a plunger which contacts the jamb as the door is closing, forcing the drop bar seal down against the floor or threshold.- When the plunger contacts the jamb, the drop bar seal actuates from the hinge side first allowing multiple compression points.
- The plunger requires low "FeatherTouch" closing force to actuate the drop bar seal. The "L" at the end of all product numbers stands for Low closing force.
- End plates are provided for all mounting applications.
- Available in sizes ranging from 457mm to 1829mm
- All Pemko automatic door bottoms are provided net length.
- Stock length automatic door bottoms can be trimmed as much as 50mm
Models shown here have all the same features as the 4301 and the 4131 except that they are handed. Disassembly of the mechanism is required to reverse the hand. For easy non-handed installation we recommend using the 4301 rather than the 430, and the 4131 rather than the 412.
Drop-Bar Seal Actuation
The drop bar mechanism prevents the seal from skidding along the floor/threshold while the door is being closed.
Click here and rotate the image to view the activation sequence.
Important Drop Bar Information
Drop seals of all types are designed to close a uniform size gap. Pemko drop seals can seal up to 19mm gaps, provided the gap is consistent. Gaps that start at less than 19mm and then grow cannot be closed. The drop seal utilizes a straight aluminum extrusion so it cannot close an inconsistent gap.
412_RL
AVAILABLE FINISHES: B, C, D, G, S
Alternate Inserts For 412
430_MRL
AVAILABLE FINISHES: C, D
430_RL
AVAILABLE FINISHES: C, D
Alternate Inserts For 430
Finishes
B (Mill Finish Extruded Bronze[Brass]) C (Clear Anodized) D (Dark Bronze Anodized) G (Gold Anodized) S (Cladded Stainless Steel)
