The main reason to use DOT approved push-on couplings for trucks and trailers

2021-12-12 13:27:55 By : Ms. Doris Huang

Parts approved by the Department of Transportation (DOT) have many applications on trucks and trailers, but the most common are for air brake lines and gearboxes. Although approved push-in joints and compression joints can be used, the advantages of push-connected joints outweigh the advantages of using low-cost compression joints. Lawson Products recommends considering these factors when choosing between DOT-approved compression connections or compression joints.

DOT push-type connection air brake accessories are easy to assemble and disassemble without tools or skills. They can be used in all air brake applications, except those designed for use between the frame and the axle or between the towing vehicle and the towing vehicle.

There are two types of push-in connectors: brass and composite.

The brass body fitting is an improvement on the trusted brass compression fitting, which was introduced in the early 1990s to reduce fitting assembly time and complexity while maintaining all the other performance advantages of brass compression fittings.

Brass push-in joints will not rust, corrode or become brittle at low temperatures.

The collet and O-ring seal design allows for relatively leak-free assembly without additional tools.

The biggest benefit of brass push-in fittings is to save time and labor costs. Push-in connectors can reduce assembly time by up to 90%. This means that a mechanic can assemble 900 push-in joints in an hour and 90 compression joints in an hour. Another way to look at it is that this person can make as many assembly connections as ten employees.

With the introduction of composite body parts, the promotion of the development of connected parts continues. They are made of a polymer body and brass threads. This type of connector retains all the labor-saving features of brass push-connect connectors, and is lighter in weight and lower in cost compared with brass push-connect connectors.

These accessories are popular because of their light weight and durable structure. The weight difference is enough to affect fuel efficiency and payload potential.

On average, composite compression fittings are approximately 43% lighter than brass compression fittings. Each truck uses approximately 60 to 100 DOT fittings, which is equivalent to a weight reduction of approximately 7 to 9 pounds. Every car. This adds up when dealing with a large number of vehicles.

This article was contributed by Jason Gatziolis, Senior Product Manager at Lawson Products.

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