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Federal Register / Vol. 86, No. 150 / Monday, August 9, 2021 / Proposed Rules
manufacturer at the time of sale, mechanical equipment,7 driver,8 and controls.9 10 CFR 431.462.
As part of the January 2016 ECS Final Rule, DOE established energy conservation standards for five categories of clean water pumps: End suction close-coupled ESCC; end suction frame mounted/own bearings ESFM; in-line IL; radially split,
multi-stage, vertical, in-line diffuser casing RSV; and submersible turbine ST pumps. 10 CFR 431.464a1i.
Each of these categories is limited to pumps that have a shaft input power greater than or equal to 1 horsepower hp and less than or equal to 200 hp at the best efficiency point BEP 10
and full impeller diameter. DOE defines each of these categories in 10 CFR

431.462. DOE provides additional specifications regarding the applicability of the test procedure, and therefore the energy conservation standards, at 10 CFR 431.464aii.11
Pumps are further delineated into equipment classes based on nominal speed of rotation and operating mode.
10 CFR 431.465. All pump equipment classes are summarized in Table II.1.

TABLE II.1EQUIPMENT CLASSES FOR PUMPS
Nominal driver speed rpm
Basic pump equipment category ESCC

ESFM

IL

RSV

lotter on DSK11XQN23PROD with PROPOSALS1

ST

1,800
3,600
1,800
3,600
1,800
3,600
1,800
3,600
1,800
3,600
1,800
3,600
1,800
3,600
1,800
3,600
1,800
3,600
1,800
3,600

Constant or variable load CL or VL
CL
CL
VL
VL
CL
CL
VL
VL
CL
CL
VL
VL
CL
CL
VL
VL
CL
CL
VL
VL

Equipment class ESCC.1800.CL
ESCC.3600.CL
ESCC.1800.VL
ESCC.3600.VL
ESFM.1800.CL
ESFM.3600.CL
ESFM.1800.VL
ESFM.3600.VL
IL.1800.CL
IL.3600.CL
IL.1800.VL
IL.3600.VL
RSV.1800.CL
RSV.3600.CL
RSV.1800.VL
RSV.3600.VL
ST.1800.CL
ST.3600.CL
ST.1800.VL
ST.3600.VL

In a test procedure RFI published on April 16, 2021, DOE requested comment on whether it should expand or remove some of the limitations in 10 CFR
431.464aii for pumps. 86 FR 20075.
In developing its recommendations, and in consideration of time constraints, the CIP working group further limited its scope to clean water pumps. Term Sheet, recommendation 8. The CIP
working group also recommended that pump energy efficiency standards not apply to 1 fire pumps, 2 self-priming pumps, 3 prime-assist pumps, 4
magnet driven pumps, 5 pumps designed to be used in nuclear facilities, and 6 pumps meeting design and construction requirements in various military specifications. Id. Consistent with the CIP working group recommendations, DOE established
energy conservation standards for clean water pumps 10 CFR 431.465b2 and excluded from the scope of the energy conservation standards the pumps listed above 10 CFR 431.465c.
Additionally, consistent with the recommendation from the CIP working group See Term Sheet, recommendation 6, DOE excluded from coverage under the standards positive displacement pumps, axial/
mixed flow pumps, double suction pumps, multistage axially split pumps, multistage radial-split horizontal pumps, multistage radial split vertical immersible pumps, and vertical turbine non-submersible pumps. 81 FR 4368, 4376.
Issue 1: DOE seeks comment on whether to consider energy conservation standards for pumps other than clean
water pumps. Additionally, DOE seeks comment on whether energy conservation standards should be considered for positive displacement, axial/mixed flow, double suction, multistage axially split, multistage radial-split horizontal, multistage radial split vertical immersible, or nonsubmersible vertical turbine pumps, fire pumps, self-priming pumps, primeassist pumps, magnet driven pumps, pumps used in nuclear facilities, or pumps specified for certain military uses. Specifically, DOE is interested in information and data on the industries in which these pumps are typically used, shipment data for these products or the relative shipments for these products compared to clean water pumps currently with the scope of DOEs efficiency standards, and
7 Mechanical equipment is any component of a pump that transfers energy from the driver to the bare pump. See 10 CFR 431.462.
8 A driver provides mechanical input to drive a bare pump directly or through the use of mechanical equipment. Electric motors, internal combustion engines, and gas/steam turbines are examples of drivers. See 10 CFR 431.462.
9 A control is used to operate a driver. See 10
CFR 431.462.

10 Best efficiency point BEP is the pump hydraulic power operating point consisting of both flow and head conditions of a pump that results in the maximum efficiency. See 10 CFR 431.462.
11 The test procedure applies to the established categories of pumps that have the following characteristics: a Flow rate of 25 gallons per minute gpm or greater at BEP and full impeller diameter; b Maximum head of 459 feet at BEP and full impeller diameter and the number of stages required for testing see section 1.2.2 of appendix A of this subpart; c Design temperature range
from 14 to 248 F; d Designed to operate with either: 1 A 2- or 4-pole induction motor; or 2 A
non-induction 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; e For ST pumps, a 6-inch or smaller bowl diameter; and f For ESCC and ESFM pumps, a specific speed less than or equal to 5,000 when calculated using U.S. customary units. 10 CFR
431.464aii.

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