IMPCO Large Size Engine Carburetor Model425 , Single-Diaphragm Air Valve , LPG Vapor / Natural Gas Applications
The Model 425 carburetor is a single-diaphragm air valve carburetor/mixer. It offers a down draft air inlet that can be used for remote air filtration or open-element type air filters. This unit is available for LPG Vapor and Natural Gas for applications requiring up to 460 CFM (217.1 L/s). The Model 425 is also available for feedback applications with the ‘FB’ designation. These FB mixers are available in a tamper resistant configuration, indicated by the “-CT” in the part number.
| SPECIFICATIONS |
| Fuel Type | LPG Vapor, Natural Gas |
| Inlet Pressure | +8.0” w.c. (1.99 kPa) B5 |
| Operating Temperature Range | -40ºF to +250ºF (-40ºC to 121ºC) |
| Mounting Position | Vertical |
| Diaphragm Material | Hydrin (Standard), Silicone (Optional) |
| HP/(kW) Rating | 287 hp (214.0 kW) @ 460 CFM (217.1 L/s) and 1.5” Hg manifold depression
333 hp (248.0 kW) @ 533 CFM (252.0 L/s) and 2.0” Hg manifold depression |
