FIELD: engines and pumps.
SUBSTANCE: invention relates to metering pump unit designed to mix liquid reducer in waste gas flow. Proposed unit comprises metering pump (2) to force reducer and premixing device (39). Reducer forced by metering pump (2) is mixed with compressed gas in mixing zone (18). Proposed metering pump unit incorporates piston head with central plate (40) whereat at least one metering pump (2) and premixing device (39) are arranged.
EFFECT: simpler design, easier assembly.
12 dwg, 19 cl
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