Air Brake Nylon Tubing Female Elbow
| Part# | Tube O.D* Female NPTF |
PARKER | EATON | MAF | GATES | DIXON |
| 1581-3C | 3/16*1/8 | 270NTA-3-2 | 70NAB32 | |||
| 1581-4C | 1/4*1/8 | 270NTA-4-2 | 1470x4 | 38113 | G32154-0402 | 70NAB42 |
| 1581-4D | 1/4*1/4 | 270NTA-4-4 | 38114 | G32154-0404 | 7ONAB44 | |
| 1581-6C | 3/8*1/8 | 270NTA-6-2 | 38115 | G32154-0602 | 70NAB62 | |
| 1581-6D | 3/8*1/4 | 270NTA-6-4 | 1470x6 | 38116 | G32154-0604 | 70NAB641 |
| 1581-6E | 3/8*3/8 | 270NTA-6-6 | 38117 | G32154-0606 | 70NAB66 | |
| 1581-8E | 1/2*3/8 | 270NTA-8-6 | 1470x8 | 38118 | G32154-0806 | 70NAB86 |
| 1581-8F | 1/2*1/2 | 270NTA-8-8 | 38119 | G32154-0808 | 70NAB88 | |
| 1581-10F | 5/8*1/2 | 270NTA-10-8 | 38120 | G32154-1008 | 70NAB108 |
| Part# | Tube O.D* Female NPTF |
Tectran | Automann | Fleet Pride | Fairview | Tramec Sloan |
| 1581-3C | 3/16*1/8 | 1370-3A | ||||
| 1581-4C | 1/4*1/8 | 1370-4A | 177.14704A | N70-4-2 | 1470-4A | S770AB-4-2 |
| 1581-4D | 1/4*1/4 | 1370-4B | 177.14704B | N70-4-4 | 1470-4B | S770AB-4-4 |
| 1581-6C | 3/8*1/8 | 1370-6A | 177.14706A | 1470-6A | S770AB-6-2 | |
| 1581-6D | 3/8*1/4 | 1370-6B | 177.14706B | N70-6-4 | 1470-6B | S770AB-6-4 |
| 1581-6E | 3/8*3/8 | 1370-6C | 177.14706C | N70-6-6 | 1470-6C | S770AB-6-6 |
| 1581-8E | 1/2*3/8 | 1370-8C | 177.14708C | 1470-8C | S770AB-8-6 | |
| 1581-8F | 1/2*1/2 | 1370-8D | 177.14708D | N70-8-8 | 1479-8D | S770AB-8-8 |
| 1581-10F | 5/8*1/2 | 1370-10D | 177.147010D | N70-10-8 | 1470-10D | S770AB-10-8 |
Trucks, trailers and buses often use air braking systems, the principle of which is based on the use of compressed air to generate mechanical energy to brake the vehicle. This accessory can play an important role in these systems.
Basic principles
(1) Compressed air transfers energy:
The air brake system compresses and stores atmospheric air in a reservoir through an air compressor. When the driver depresses the brake pedal, the control valve regulates the compressed air in the system and uses the high-pressure air to push the braking device to generate mechanical force and realize the braking effect.
(2) Air pressure and mechanical conversion:
Braking systems utilize differential air pressure to control brake action. The air pressure is converted into a hydraulic or mechanical force that pushes the brake shoes or blocks, causing them to rub against the wheels, slowing or stopping vehicle movement.
Main components
Air compressor:
Responsible for compressing air from the atmosphere and storing it in the storage tank to ensure that the system has sufficient pressure for use during braking.
Air storage tank:
Used to store compressed air to ensure sufficient air supply during emergency braking or long continuous braking. Multiple tanks can serve different axles to ensure safe redundancy.
Brake Valve:
The driver operates the brake valve by depressing the brake pedal, which regulates the flow of air from the reservoir to the individual brakes. Brake valves are typically designed with multiple settings for gradual pressurization and depressurization.
Brake Chamber:
Receives compressed air from the brake valve, which moves the brake piston. The movement of the piston is transmitted to the brake shoe or block through a mechanical linkage, which causes it to rub against the wheel to generate braking force.
Brake shoes/blocks and drums/discs:
The brake shoe or block, driven by the piston, comes into contact with the brake drum or disk fixed to the wheel and produces a braking effect by friction, ultimately slowing down or stopping the vehicle.
Emergency brakes and auxiliary systems:
Some systems also include emergency brakes (e.g., parking brakes) and anti-lock braking systems (ABS) to improve safety and stability.
Workflow
(1) Starting and inflation
After the vehicle is started, the air compressor starts to work, compressing the air and storing it in the tank to form a stable high-pressure air reserve system.
(2) Brake Operation
When the driver presses the brake pedal, the brake valve will be activated, controlling the flow of compressed air from the reservoir to the brake chamber.
In the brake chamber, the high-pressure air pushes the piston, causing it to move outward.
The movement of the piston, through a system of tightly connected linkages, pushes the brake shoes or blocks to apply pressure to the brake drums or discs, thus providing sufficient friction to slow down the wheels.
(3) Brake force distribution and adjustment
Modern air braking systems are usually equipped with an automatic adjustment function that distributes the braking force according to the vehicle load and road conditions, ensuring balanced braking and preventing wheel lock-up.
(4) Release and Reset
After pressing the brake pedal, when the pedal is released, the brake valve shuts off the supply of compressed air, and the piston in the brake chamber returns under the action of a spring or other resetting device, so that the brake shoes or blocks are released from the brake drums or discs, and normal operation is resumed.
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