A gradual evolution of U.S. efficiency standards for equipment over the last four decades has led to the pump rule going into effect next January. In 2011, the Department of Energy (DOE) initiated efforts to develop energy conservation standards for pumps. These efforts have resulted in an amendment to The Energy Policy and Conservation Act (EPCA) of 1975. Part C of Title III establishes the “Energy Conservation Program for Certain Industrial Equipment,” which now includes pumps. The effective date of this rule was March 28, 2016. Compliance with the new standards established for pumps in this final rule is required on and after Jan. 27, 2020. Subsequently, in June 2014 the Hydraulic Institute (HI) published HI 40.6—Methods for Rotodynamic Pump Efficiency Testing to align with these new requirements. In 2015, HI launched the Pump Test Lab Approval Program (PTLAP) to position pump manufacturers to participate in the HI Energy Rating Program and provide support in complying with the testing requirements of the Energy Conservation Standard. In December 2016, HI published HI 40.5, a program guideline for the HI Energy Rating Program. The HI Energy Rating Program was launched to the public in March 2017. The scope of the standards is specified at 10 CFR 431.464 and 10 CFR 431.465, respectively, and concerns what is referred to as “clean water pumps.”
- 1 to 200 horsepower (hp), shaft power at the best efficiency point (BEP), at full impeller diameter for the number of stages required for testing to the standard
- 25 gallons per minute (gpm) and greater (at BEP at full impeller diameter)
- 459 feet of head maximum (at BEP at full impeller diameter and the number of stages specified for testing)
- design temperature range from 14 to 248 F
- design for either: a 2- or 4-pole induction motor, or a noninduction motor with a speed of rotation operating range that includes speeds of rotation between 2,880 and 4,320 revolutions per minute (rpm) and/or 1,440 and 2,160 rpm, and in either case, the driver and impeller must rotate at the same speed
- for ST pumps, 6-inch or smaller bowl diameter
- for ESCC and ESFM pumps, specific speed less than or equal to 5,000 when calculated using U.S. customary units