Armstrong S-55-3 Series Cast Iron Circulating Pump 1/2HP

Armstrong S-55-3 Cast Iron Pump

Engineered to neutralize hydraulic instability, the Armstrong S-55-3 utilizes a radially split cast iron casing to facilitate consistent fluid circulation in industrial hydronic systems. Its internal geometry is calibrated to stabilize laminar flow while minimizing turbulent kinetic energy during high-velocity cycles. By integrating a precision-balanced impeller, this 1/2HP unit optimizes thermal dissipation and maintains structural integrity within commercial distribution networks, preventing cavitation-induced wear under sustained heavy-duty operational loads.

Utilizing a NEMA-rated 3-phase motor architecture, the Armstrong S-55-3 executes precise torque delivery to mitigate electrical amperage spikes during startup. The integrated mechanical seal assembly is engineered to sustain vacuum-tight integrity up to 250°F thermal thresholds, preventing elastomer degradation. By leveraging permanently lubricated bearings and a high-alloy steel shaft, this 3 PH configuration minimizes axial deflection and stabilizes rotational frequency, significantly extending the mean time between failures in industrial environments.

• Powerful 3 phase motor ideal for torque
• Durable radial split body allows easy service
• Leak proof silicon carbide seal ensures life
• Superior oversized shaft reduces spare parts costs
• Max 175 PSI perfect for industrial systems
• Practical in line connection for easy setup
• Versatile hot and cold water circulation service