Page 125 - HVAC Pump Handbook

Rishel_CH05.qxd 21/4/06 6:12 PM Page 122

Physical Description of HVAC Pumps

122 HVAC Pumps and Their Performance

Figure 5.12 Cross-section of an end-suction, volute type pump.

Other pump parts relating to axial-flow pumps can be found in Fig. 5.8,
the drawings for the turbine pump.

5.6.2 Materials of construction
Since most HVAC pumps do not operate under corrosive or erosive
operating conditions and are not of extremely high pressure, they are
normally cast iron, bronze fitted. This means that the pump body is
cast iron and the internal trim is bronze. The impeller and case rings

Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)
Copyright © 2006 The McGraw-Hill Companies. All rights reserved.
Any use is subject to the Terms of Use as given at the website.