DE Logo

Design Envelope Compass R Circulators

Product Image
Design Envelope Compass R Isometric
Design Envelope Compass R SS Isometric
Design Envelope Compass R Front

  • Summary
  • Applications

    Residential heating and cooling; potable water supply

  • Description

    The Armstrong Compass R is an energy-efficient variable speed dry-rotor circulator. Designed to replace existing fixed speed circulators, with popular flange-to-flange dimensions, Compass R can be considered a universal replacement for all circulators in its capacity range.

  • Materials

    Cast iron and stainless steel volutes.

  • Configuration

    Eight operation modes with “Auto” algorithm, four Sensorless modes and three fixed speed modes. 50 Hz and 60 Hz designs

  • Performance range

    0 to 140 USgpm (8.8 L/s) flow; 0 to 40 ft (12.2 m) head

  • Temperature

    Max ambient temp. 40°C; max water temp. 110°C

  • Power Range

    1/6 hp and 1/2 hp

  • Size

    2 and 4 bolt

Lowest installed cost

  • Wide performance range 

  • Large wiring chamber and front-mounted terminal block for much easier and faster installation compared to any other circulator currently available
Design Envelope

Lowest installed cost. Lowest operating cost.


Lowest operating cost

  • Easy and quick setup of energy-saving features: eight operation modes with patented “Auto” algorithm, 3 Sensorless modes, 4 constant pressure modes and 3 fixed speed modes
  • Design Envelope Intelligent Variable Speed technology, combined with ECM motors, saves up to 70% in operating cost over fixed speed circulators

Lowest environmental cost

  • Design Envelope Intelligent Variable Speed technology, combined with ECM motors, saves up to 70% in electrical energy and related carbon emissions over fixed speed circulators



Case studies

Learn how we've helped customers reduce costs, energy usage, and project risks.

Learn more


U.S.A. Utility Energy Rebate Info.

360 Service and Support

Design Envelope Compass R- solution outline

Design Envelope Compass - solution outline

Fused Disconnects for use with Design Envelope Pumps - white paper

The Advantages of Hydronic Systems versus Variable Refrigerant Flow (VRF) – A Critical Analysis - WhitePaper

Hydronic Solutions - digital catalog

Working Clearances of Design Envelope Pump Controls - WhitePaper

Energy audits

Energy Analysis

We thoroughly examine how and where energy is being used in your business and buildings and then tell you exactly where efficiencies and savings can be found.

Get started

resources & tools

More Tools

We have a suite of free online support materials and tools. Find the essentials to learn, apply, and maintain Armstrong equipment.

Get started

Contact Us

Contact us

We are happy to help. Discuss your project and product needs with us, check the status of your shipments, or let us save the day in an emergency.

Get in touch