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

Armstrong S-55-1 Cast Iron Pump

Engineered to neutralize hydraulic instability, the Armstrong S-55-1 utilizes a durable cast iron housing to facilitate consistent fluid circulation in commercial HVAC systems. Its internal volute geometry is calibrated to stabilize laminar flow while minimizing turbulent kinetic energy during continuous duty cycles. By prioritizing precise impeller clearance, this 1/2HP unit optimizes thermal dissipation and maintains structural integrity within closed-loop hydronic distribution networks under sustained operational pressures.

Utilizing a NEMA-rated motor architecture, the Armstrong S-55-1 executes precise torque delivery via single-phase power synchronization to mitigate electrical amperage draw. 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 configuration minimizes axial deflection and stabilizes rotational frequency, extending the mean time between failures in industrial environments.

• Powerful motor 1750 RPM ideal high flow
• Durable radial split body withstands harsh conditions
• Leak proof silicon carbide seal ensures life
• Superior oversized alloy shaft reduces parts costs
• Max 175 PSI perfect for heating systems
• Practical 2 inch connection for easy installation
• Versatile applications include multi stage zoning service