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Distance between the foot valve and wheel-end chambers makes local air delivery useful, which is where the Bendix Air Brake Relay Valve fits into the service-brake circuit. Rather than sending the full application volume through a long control line, the valve uses nearby reservoir air when the control signal reaches the valve. The exact supply, delivery, control, and mounting arrangement determines where the Bendix 103028N belongs. Those connection points matter most when comparing relay valves that can look alike but route air differently through the vehicle.
| Balance / Primary Service Port | 1/8-27 NPT (with Cover) |
| Body Configuration | 1 SUP / 4 DEL (V) |
| Cautionary Note(s) | Not applicable to this part |
| Control / Secondary Service Port | 1/4-18 NPT |
| Control Port Orientation (CW from Front Face) | 180Adeg |
| Crack Pressure | 4.0 PSI |
| Delivery Port 1 | 1/2-14 NPT |
| Delivery Port 2 | 1/2-14 NPT |
| Delivery Port 3 | 1/2-14 NPT |
| Delivery Port 4 | 1/2-14 NPT |
| Delivery Port 5 | Not applicable to this part |
| Delivery Port 6 | Not applicable to this part |
| Delivery Port 7 | Not applicable to this part |
| Delivery Port 8 | Not applicable to this part |
| Exhaust Port | Dust Shield |
| Internal Supply Passage to Cover | Not applicable to this part |
| Market Indicator | Aftermarket New |
| Maximum Operating Temperature | 200 AdegF (93 AdegC) |
| Minimum Operating Temperature | -40 AdegF (-40 AdegC) |
| Mounting | .96 IN x .40 IN Slot (4x) |
| Mounting Bracket Direction | Not applicable to this part |
| Mounting Bracket Location | Loose in Box |
| Mounting Orientation (CW from Front Face) | Not applicable to this part |
| Supply Port 1 | 1/2-14 NPT |
| Supply Port 2 | Not applicable to this part |
| TMC Washer | RV040 |
| Country of Origin (Primary) | MX |
| UPC | 07894294735372 |
| VMRS Code | 013010009 |
| Brand | Part Number |
|---|---|
| BEN103028N, BW103028N | |
| MERITOR | R955103028N |
| N/A | 102802N |
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