Series 4270 motor mounted centrifugal pumps with iron body, PEI resin or bronze impeller, stainless steel shaft, faceplate and seal parts; viton carbon and ceramic mechanical seal and 3600rpm, open drip-proof, ball bearing motors are now available OFF THE SHELF in standard voltages.

The Armstrong 4270 close coupled horizontal pumps are motor mounted and designed for long service life and easy maintenance.

Materials
 
• Cast iron with ULTEM impeller
• 416 stainless steel shaft

Configuration
 
• Inside single-spring mechanical seal.
• Bronze-fitted or all-bronze construction.
• Designed for 3,600 RPM (1,800 RPM optional)

Performance range

Up to 3,600 USgpm (227 L/s) flow; up to 130 ft (40 m) head

Extended durability and service life

• High-strength resin impeller minimizes axial thrust, ensuring smooth performance and long life 
• Permanently lubricated, heavy-duty motor ball bearings accommodate radial loads and residual hydraulic thrusts 
• Self-lubricating mechanical seal prevents liquid seepage 
• Aluminum die cast adaptor with integral support foot delivers lightweight and durable construction

Easy and cost-effective servicing

• Radially-split volute can be left in the line while servicing the pump, eliminating needless disconnecting of pipes 
• Back pull-out design eliminates the need to break piping connections when servicing the pump