Armstrong S Series Circulator Pumps Buyers Guide & Review
| Made By : Mike West

The Armstrong S series of in-line circulator pumps is suitable for domestic hot water systems. This series is built using a standard three-piece design that features a radially-split body, oversized shaft, centrifugal impeller, positive mechanical seal, and modular construction. The S series has been used by HVAC professionals for decades because it is cost-effective, durable, and easy to maintain.

Features

  • Maintenance free design which has permanently lubricated ball bearings and requires no maintenance at all
  • Radially-split body can be left in-line while servicing pump, eliminating disconnecting of pipes
  • Oversized shaft made from stainless steel
  • Balanced centrifugal impeller ensures maximum water delivery in the HVAC system
  • Proven seal design made from strong and long-lasting materials for extended operating life
  • Three piece modular construction and back pull-out design for easy replacement of wear components
  • Certified ≤ 0.25 weighted average percent lead and complies with California Health and Safety Code Section 116875 (commonly known as ab1953)
ARMSTRONG S SERIES CIRCULATOR PUMPS
Armstrong S Series Circulator Pumps

Model Comparison Chart

Model Flanges (NPT) HP Voltage Material of Construction GPM Max. Head
S-25 Sold separately 1/12 115 Bronze 31 6′
S-35 2″ 1/6 115 Cast Iron 72 11′
S-45 Sold separately 1/4 115 Bronze 109 16′
S-46 3″ 1/3 115 Cast Iron 112 19′
S-55-3 3″ 1/2 208-230/460 Cast Iron 121 24′
S-35 2″ 1/6 115 Bronze 72 11′
S-46 3″ 1/3 115 Cast Iron 112 19′
S-55-1 3″ 1/2 115/230 Cast Iron 121 24′
S-55-3 3″ 1/2 208-230/460 Cast Iron 121 24′
S-57-3 3″ 3/4 208-230/460 Cast Iron 139 29′
S-57-3 3″ 3/4 208-230/460 Cast Iron 139 29′
S-57-1 3″ 3/4 115/230 Cast Iron 139 29′
S-45 Sold separately 1/4 115 Bronze 109 16′
S-55-3 3″ 1/2 208-230/460 Bronze 121 24′
S-55-1 3″ 1/2 115/230 Bronze 121 24′
S-69-1 3″ 1 115/230 Cast Iron 160 34′
S-69-3 3″ 1 208-230/460 Cast Iron 160 34′
S-57-3 3″ 3/4 208-230/460 Bronze 139 29′
S-57-3 3″ 3/4 208-230/460 Bronze 139 29′
S-57-1 3″ 3/4 115/230 Bronze 139 29′
S-55-1 3″ 1/2 115/230 Bronze 121 24′
S-55-3 3″ 1/2 208-230/460 Bronze 121 24′
S-46 3″ 1/3 115 Bronze 112 19′
S-57-1 3″ 3/4 115/230 Bronze 139 29′
S-69-3 3″ Bronze 1 208-230/460 160 34′
S-69-1 3″ 1 115/230 Bronze 160 34′
PERFORMANCE CURVES

armstrong s series circulator pumps curves

DIMENSIONS

armstrong s series circulator pumps dimensions

DESIGN INFORMATION

MATERIALS OF CONSTRUCTION

REPAIR PARTS
armstrong s series circulator pumps repair parts
*For a complete part listing, please refer to the repair parts manual*
BROCHURE
Armstrong S Series Circulator Pump Brochure
INSTALLATION MANUAL
Armstrong S Series Circulator Pump Installation Manual
REPAIR PARTS
Armstrong S Series Circulator Pump Repair Parts

Pump Products application engineers are standing by to help you find the right pump, as well as to provide price quotes, stocking availability and shipping information. Call our toll free number 1-800-429-0800 to speak to an expert today.