Seal the Gap Around Dock Leveler Pull Chains
Pull chain slots on loading dock levelers are one of the most commonly overlooked sources of air leakage, pest entry, and debris infiltration in a dock pit. The B0392 brush ring weather seal from Action Industries is a purpose-built solution that closes this gap without interfering with chain operation. Each ring clamps directly over the pull chain opening, creating a tight perimeter seal that blocks drafts, dust, dirt, insects, and rodents from entering the dock area or falling into the pit below.
Available in two sizes — 1-3/4" and 2-1/2" — to match the most common pull chain slot dimensions found across dock leveler brands. Whether you are maintaining a climate-controlled warehouse or simply keeping your dock pit clear of debris, this is a fast, low-cost fix for a problem that often goes unaddressed.
Polypropylene Bristle Construction
The bristles on each brush ring are made from polypropylene — a material selected specifically for loading dock environments. Polypropylene does not absorb water, so the bristles will not swell, sag, or degrade when exposed to rain, snow, washdowns, or standing water in the pit. Equally important, the material remains flexible in sub-zero temperatures, maintaining a consistent seal even during the coldest months of operation.
Each set of bristles is securely clamped to a metal rod at the core of the ring. This construction resists pull-out during repeated chain movement, ensuring the seal stays intact through heavy daily use without needing frequent replacement.
Where to Use This Brush Ring
This seal is designed specifically for pull chain slots on pit-style loading dock levelers — the opening through which the manual activation chain passes from the deck surface into the pit area. It is compatible with most mechanical dock levelers that use a pull chain activation system to raise the deck.
Facilities that benefit most from this type of seal include food packing and processing plants, cold storage and refrigerated warehouses, pharmaceutical distribution centers, airports and logistics hubs, and general industrial dock operations where environmental control, cleanliness, or pest prevention is a priority.
Specifications
- Application: Pull chain slot openings on loading dock levelers
- Available ring sizes: 1-3/4" (B0392-01-W) and 2-1/2" (B0392-00-W)
- Bristle material: Polypropylene
- Water resistance: Bristles do not absorb water
- Cold weather performance: Remains flexible in freezing temperatures
- Bristle retention: Clamped to metal rod to prevent pull-out
- Manufacturer: Action Industries
- Typical lead time: Ships in 4–7 business days
Choosing the Right Size
Selecting the correct ring size depends on the diameter of the pull chain opening in your dock leveler deck. Measure the slot or hole diameter before ordering. The 1-3/4" ring (B0392-01-W) fits smaller, standard-diameter openings, while the 2-1/2" ring (B0392-00-W) accommodates wider chain slots commonly found on heavy-duty or older leveler models. If you are unsure of the correct size for your equipment, contact Barron Equipment and a dock product specialist will help you identify the right fit.
Part of a Complete Dock Leveler Sealing System
A brush ring addresses the pull chain opening, but a fully sealed dock leveler requires attention to every gap around the leveler perimeter. Barron Equipment carries a full lineup of dock leveler seals from Action Industries — including brush weather seal kits, rear hinge seals, and RodentBlock seals with Xcluder technology — so you can seal the entire leveler in a single order. For facilities that also need to weatherproof dock door openings, our door weather seals cover bottom seals, side seals, and rolling steel door perimeter seals.