Armstrong S-46 Series Cast Iron Circulating Pump

Armstrong S-46 Cast Iron Pump

Engineered to facilitate superior fluid circulation in high-head commercial hydronic loops, the Armstrong S-46 utilize a durable cast iron volute to neutralize hydraulic instability. Its internal geometry is calibrated to stabilize laminar flow while minimizing turbulent kinetic energy during continuous duty cycles. By prioritizing precise impeller-to-casing clearance, this unit optimizes thermal dissipation and maintains structural integrity within closed-loop heating systems, preventing cavitation-induced wear under sustained heavy-duty operational loads in demanding industrial environments.

Featuring a high-torque 1/3HP single-phase motor, the S-46 executes precise rotational control to maintain constant flow rates regardless of system pressure fluctuations at 1725 RPM. The integrated mechanical seal is engineered to sustain vacuum-tight integrity up to 250°F, protecting internal components from thermal stress and preventing system pressure loss. By leveraging a robust high-alloy steel shaft and precision-sealed bearings, this configuration minimizes mechanical vibration and stabilizes rotational frequency, ensuring maximum reliability in continuous-duty service.

Key Features of Armstrong S-46

• Powerful 1/3HP motor ensures 1725 RPM
• Durable cast iron body withstands 175PSI
• Leak proof seal prevents 250F leaks
• Superior shaft system reduces maintenance costs
• Max 85 USGPM flow capacity ensures performance
• Practical in-line flange for easy installation
• Versatile applications for 35 foot head