Two ANSI/HI standards on air-operated pumps and pump tests have been updated by the Hydraulic Institute.

The 2004 edition of the ANSI/HI standard on air-operated pumps has been updated by the Hydraulic Institute, Parsippany, N.J., and published asAir-Operated Pumps ANSI/HI 10.1-10.5-2010.

The updated standard is for air-operated pumps and includes positive-displacement reciprocating pumps used for general liquid transfer. These pumps usually are driven by means of a compressed gas such as air from an outside source.

The pump may be designed with a single diaphragm or double diaphragms connected to a reciprocating connecting rod. One side of the diaphragm is in contact with the liquid being pumped and the other side is in contact with the compressed gas.

The 24-page standard includes the four main sections:
  • Types, configurations and nomenclature.
  • Definitions.
  • Design and application.
  • Installation, operation and maintenance.
Also, the Hydraulic Institute has updated the 2004 edition of the ANSI/HI standard on air-operated pump tests and publishedAir Operated Pump Tests ANSI/HI 10.6-2010.

This standard applies to the test of air-operated pumps. It provides uniform procedures for mechanical and other pump performance testing and for recording of the test results of air-operated diaphragm and bellows pumps. All tests are also based on using water at ambient temperature.

The new version of the standard covers the following areas:
  • Test to demonstrate mechanical integrity when pump is in operation.
  • Performance test.
  • Noise measurement.
  • Hydrostatic testing of pressure-retaining components.
  • Net positive suction head (NPSH) test.
Both standards are available in a printed brochure or in PDF format. For more information or to order, visit, or send an e-mail to