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Designed for service-brake circuits that require fast air delivery, the Bendix Air Brake Relay Valve feeds brake chambers directly from a nearby reservoir supply. A small control signal opens the valve to release high-volume air locally, drastically shortening response time when the brakes are applied. Its layout features a 1/8-27 NPT primary service port, two supply positions, five delivery positions, and a 4.0 PSI crack pressure rating. These precise port configurations and crack pressure rating make the Bendix 801629 the exact R-style relay replacement for a matching circuit.
| Balance / Primary Service Port | 1/8-27 NPT (with Cover) |
| Body Configuration | 2 SUP / 5 DEL (5H) |
| Cautionary Note(s) | Not applicable to this part |
| Control / Secondary Service Port | 1/4-18 NPT |
| Control Port Orientation (CW from Front Face) | 90Adeg |
| Crack Pressure | 4.0 PSI |
| Delivery Port 1 | 1/2-14 NPT |
| Delivery Port 2 | 1/2-14 NPT |
| Delivery Port 3 | Cored Closed |
| Delivery Port 4 | Cored Closed |
| Delivery Port 5 | 1/4-18 NPT |
| 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 | 3/8-16 UNC-2B (3x) |
| Mounting Bracket Direction | Not applicable to this part |
| Mounting Bracket Location | Not applicable to this part |
| Mounting Orientation (CW from Front Face) | 180Adeg |
| Supply Port 1 | 1/2-14 NPT |
| Supply Port 2 | 1/2-14 NPT |
| TMC Washer | RV040 |
| Country of Origin (Primary) | MX |
| UPC | 07894294756100 |
| VMRS Code | 013010009 |
| Brand | Part Number |
|---|---|
| BW801629 | |
| N/A | 102802N |
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