Design Envelope technology is a demand based intelligent control solution that models equipment and system behavior, monitors actual system conditions, and dynamically adjusts equipment operation to match system demand. Design Envelope technology is at the core of Armstrong’s groundbreaking advances in building performance. Design Envelope technology enables the greenest, most flexible and most cost effective fluid-flow and HVAC systems on the planet – resulting in both, lowest installed and lowest operating cost with the same equipment

Generation 5 pumps, including Tango parallel pumps above, now meet the IE5 efficiency standard for motors. The new models can deliver up to 96.6% motor efficiency. This includes the new Design Envelope Tango parallel pumps and Design Envelope Vertical In-Line pumps up to 10 hp.

Design Envelope Permanent Magnet pumps that are engineered to deliver 20% lower operating costs than variable speed pumps with standard induction motors.

The new pumps are available with motors ranging from 15 hp to 50 hp, and operate at NEMA Ultra-Premium Efficiency levels that exceed the efficiency targets of both the US Department of Energy and the European Union.

Better performance at higher RPMs means that in some cases a smaller Design Envelope Permanent Magnet Pump can deliver the same flow and pressure as a larger, more expensive competing model,” said David Lee, Offering Manager, Armstrong Fluid Technology. “These new pumps also feature smaller dimensions and are less expensive to purchase and install because permanent magnet motors offer a substantial reduction in both size and weight.

Beyond the motor efficiency, a number of additional design innovations make the new Design Envelope pumps more energy-efficient and cost-effective:

Armstrong’s patented Parallel Sensorless Control stages multiple pumps and regulates output for best efficiency across the entire pump array, saving 10-30% in operating costs
Adjustable design points and setpoint based on the actual on-site conditions
A quadratic pressure control curve that provides more efficiency than a linear pressure control curve

A constant-flow function for maintaining a desired flow rate in recirculation applications
Advanced connectivity via Armstrong’s Pump Manager, a cloud-based performance tracking service, provides industry-leading analytics and insights along with alerts, alarms and data storage

Applications : HVAC-system pumping; general purpose pumping; industrial/process pumping (water or glycol based).

Description: The Armstrong Suction Guides (SG) are multi-function pump fittings that provide a 90° elbow, guide vanes, and an in-line strainer. Suction guides reduce pump installation cost and floor space requirements.

Materials :Cast Iron, ductile iron; grooved, flanged or threaded connections
Performance range : Suitable for all Armstrong commercial pumps and pumping systems

Temperature : 230°F (110°C)

Size: 1.5” to 20” (40 mm to 500 mm)

- Reduced installation cost and footprint
- No separate in-line strainers, long-radius elbows and superfluous piping (less material cost)
- Fewer pipe connections, down from five (or more) to two (less labor cost)
- Reduced floor space requirements of up to 20% compared to traditional piping
- Use of Flow-Trex valves yields further space savings

Applications : HVAC-system pumping; general purpose pumping; industrial/ process pumping (water or glycol based).
Description: The Armstrong Flo-Trex Valves (FTV) are multi-function pump fittings that reduce equipment and installation costs
Materials: Cast iron, ductile iron; grooved, flanged or threaded connections
Performance range: Suitable for all Armstrong commercial pumps
Temperature: 230°F (110°C)
Size: 1.25” to 20” (32 mm to 500 mm)

ApplicationsA service that enables Active Performance Management™ in intelligent Design Envelope pumps.

Description: Pump Manager is a cloud-based subscription service that enables Active Performance Management™ in Armstrong intelligent Design Envelope pumps. It proactively tracks and manages pump performance and provides early diagnostic warnings, web accessible trends and analysis along with automated reports. Pump Manager helps customers make informed decisions and take immediate action to deliver the best possible HVAC performance.

Materials : The Connectivity Kit includes an Armstrong-specified router with built-in SIM card.

Size1-1250 HP

ApplicationsCommercial or industrial closed-loop systems, including HVAC chilled-water systems, boiler systems, cooling tower systems, or process water loops.

Description: The Armstrong Intelligent Fluid Management System (iFMS) integrates superior pump-and control technology into a single pumping solution yielding both compact and carefree installation as well as superior energy performance. iFMS is ideally suited for partial or all variable speed chilled-water plant applications (variable primary flow, variable secondary flow, variable condenser water flow). In combination with Parallel Sensorless control iFMS saves 30% or more in energy over any other parallel pumping configuration available today.

Configuration : Up to 4 pumps in one unit. Catalogue-based pre-engineered solutions or designed to customer specification. Integrated control system (IPS 4000, IPC 11550) or connecting to chiller plant/BMS control. Optional single point power panel

The Design Envelope 4332 Tango Pumps are engineered for optimal performance, energy efficiency, and serviceability, making them an ideal solution for HVAC systems, general-purpose pumping, and industrial/process applications involving water or glycol-based fluids.

Product Description
This pipe-mounted dual-pump unit integrates intelligent controls for a streamlined, space-saving installation that achieves outstanding energy performance. Designed for parallel pumping or full redundancy operation, the Tango Pumps can reduce energy consumption by up to 75% compared to traditional constant-speed or variable-speed pumps. With smart technology, they offer the flexibility and efficiency required in today’s high-demand environments.

Materials
The Tango Pumps are crafted with durable, high-quality materials:
• E-coated cast iron body for corrosion resistance and longevity.
• 316 stainless steel impeller, providing robust performance and resisting wear.
• Sintered silicon carbide mechanical seal, ensuring reliability even in demanding conditions.

Configuration & Intelligent Controls
Equipped with on-board Intelligent Variable Speed controls, these pumps offer Sensorless and Parallel Sensorless control options. This configuration ensures reliable performance across diverse applications, including UL Type 12 or UL Type 4X (for outdoor use) enclosures. Available with IE5 Ultra Premium Efficiency motors, they further optimize energy use. The design includes an outside-balanced mechanical seal for enhanced durability and maintenance ease.
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Performance Specifications
• Flow Rate: Handles up to 2,000 US gallons per minute (126 liters/second) in parallel flow.
• Head Range: Capable of reaching up to 180 feet (55 meters).
• Temperature Range: Suitable for high-temperature applications, operating up to 250°F (121°C).
• Power Range: Available in 15 to 40 horsepower (11 to 30 kW).
• Size: Compact 4-inch (100 mm) design for easy integration.
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Key Benefits
Lowest Installed Cost
• Compact Design: The dual-pump vertical in-line configuration eliminates the need for inertia bases, housekeeping pads, and flex connectors, saving space and costs. It also reduces the need for additional piping risers and pump trim.
• Integrated Controls: The intelligent controls eliminate the requirement for a separate variable frequency drive (VFD) and reduce procurement and installation costs by integrating wiring, calibration, and differential pressure sensors.
• Optimized Equipment Size: With DEPM motors, the Design Envelope selection often allows for a smaller motor and pump, reducing initial capital costs.
Lowest Operating Cost
• Ultra-Efficient Motors and Hydraulics: The advanced hydraulic design combined with DEPM motors provides IE5 Ultra Premium Efficiency, significantly lowering operating costs, especially in high turndown applications.
• Intelligent Energy Management: The integrated controls and precision component matching deliver up to 75% energy savings compared to traditional constant-speed and variable-frequency systems.
• Parallel Sensorless Control: This standard feature provides the most efficient staging of both pumps, maximizing energy savings.
Enhanced Serviceability and Zero Downtime
• Built-in Isolation Valves: Isolation valves on both suction and discharge sides allow one pump to be serviced without interrupting operation, ensuring continuous service.
• Convenient Service Features: Overhead lifting eyes make it easy to remove pump ends with integrated controls for maintenance, minimizing downtime and simplifying repairs.
Minimal Environmental Impact
• Lower Embodied Carbon: The Tango Pumps have up to 85% less embodied carbon than traditional two-pump end-suction setups, achieved through smaller equipment sizes and the elimination of bases, pads, extra piping risers, and connectors.
• Reduced Operating Carbon: The energy efficiency and Active Performance Management, including self-diagnostics, extend the pump’s operational life while reducing its carbon footprint.
• Efficient Packaging: The integrated design allows for more economical packing and shipping, reducing packaging waste compared to systems shipped with loose components.
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Conclusion
The Design Envelope 4332 Tango Pumps bring unmatched energy efficiency, compact design, and intelligent control capabilities, providing superior performance while significantly lowering both operational and environmental costs. With robust serviceability features and a design that supports sustainable practices, the Tango Pumps represent a forward-thinking solution for modern pumping needs.