Armstrong 4280 Series Horizontal Close Coupled Pump 5x4x8-5HP

(No reviews yet) Write a Review
Please Contact Us For Lead Time!
$265.00 (Fixed Shipping Cost)
  • Armstrong 4280 Series Horizontal Close Coupled Pump 5x4x8-5HP
  • Armstrong 4280 Series Horizontal Close Coupled Pump 5x4x8-5HP


Armstrong 4280 Series Horizontal Close Coupled Pump 5x4x8-5HP 460/3/60. ANSI 5” inlet, 4” outlet companion flanges and gaskets supplied by others. The Armstrong 4280 horizontal end-suction pumps are equipped with close-coupled motors to minimize footprint requirements for HVAC-system pumping; light industrial/ process pumping. The Armstrong 4280 pump features cast iron ductile iron, or bronze casing, cast iron or bronze impellers in pump sizes 1" to 6". The performance range is up to 2,000 US gpm and up to 400ft.


Design Features:

  • Easy maintenance due to back pull-out design
  • Extensive interchangeability of parts
  • Manufactured and inspected to rigid standards
  • Quiet operation
  • Self venting center-line discharge
  • Confined casing gasket
  • Drilled and tapped gauge connections are standard on suction and discharge ports
  • Mount with motor feet, or motor and pump feet for convenience

The Casing is a radially-split casing with center-line discharge that can be left in the line while servicing the pump, eliminating needless disconnecting of pipes. Tapped openings are provided for draining and gauge connections. Double volute design where radial loads demand. Center-line discharge allows self venting preventing possible pump failures due to vapor lock. The Impeller is a balanced impeller designed with balancing chamber and pressure relief holes in the impeller that reduce axial thrusts to a minimum, ensuring smooth performance and long life.

If you have any questions please give us a call at 1-800-781-7405 or email us your request.

Please Contact Us For Lead Time!

View AllClose

Warranty Information

Warranty: Quoted prices include standard factory warranties. Warranty requires install, start-up and operation as per the manufacturers IOM. Job Site Assistance: By Others Start-Up: By Others Commissioning: By Others: These services, if a project requires start up, they are responsibility of contractor or commissioning agent. Owner training assistance, as outlined in any equipment specifications the responsible of the commissioning agent. Clarifications & Exclusions 'ALTERNATES' are offered for consideration and will always be subject to the engineer's and owners approval. Excludes any seismic calculations or supports, coatings other than factory standard. Terms: prices are quoted are "each" (unless stated otherwise) and FOB point of origin with no freight allowed freight ships via common ground carrier, and inside continental US Only - any special shipping requirements to be responsibility of purchaser. We offer all prices less tax, with a validity of 30 days from the date quoted and all sales are final. Once items have shipped and left the warehouse National Pump Supply is not responsible for any damage caused during the shipping process. You must contact the shipper directly and file a claim with the shipping company. Lead Time: All prices offered are based on standard factory lead times (or) as stated within quotation. Expedited shipments may be available at an additional charge. Contact your Sales Engineer for the ETA of any specific equipment on any order or quotation.
View AllClose