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DT 4.10, DT 4.16, DT 4.25, DT 4.40, DX 4.10, DX 4.16, DX 4.25, DX 4.40
4.3.3
VARIANTS DT(X) 4.10-4.40 IN SH 19 OR SH 20 ACOUSTIC ENCLOSURE
Follow the instructions in the supplementary manual 28100727500 (see homepage).
For particularly noise-sensitive applications, the pumps are also available
with acoustic bonnets.