RS – Multi-Stage, I-280
Centrifugal Pump 280 – 16.03.EN
10
Table 3. Axial Impeller Alignment Control Dimensions - Continued
*Additional stages will require compensation for interstage compression, on average .003 inch per stage. Use .010
inch shim as needed. Refer to Section XI, Paragraphs F.
RSA No NPSH Impeller
RSB .210 – [#of stages X (.003) - Gaps] = NPSH Impeller Setting
RSC .538 – [#of stages X (.003) - Gaps] = NPSH Impeller Setting
RSD .792 – [#of stages X (.003) - Gaps]= NPSH Impeller Setting
RSE .210 – [#of stages X (.003) - Gaps] = NPSH Impeller Setting
Low NPSH Impeller
(Suction)
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