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Pump Connections

Pump Connections

Danfoss Pump Connections – Suction, Discharge, and Non-Return Valves

Danfoss high-pressure pumps require specialized connections rated to 1,200 psi (82 bar) or higher and machined from Super Duplex stainless steel to resist seawater corrosion. ForeverPure stocks the full line of OEM Danfoss connection components for APP, APP-S, PAH, and PAHT axial piston pumps used in seawater reverse osmosis (SWRO) and industrial water treatment systems.

Components in this category

  • Suction and discharge connections – threaded and flanged, sized for APP 1.5 through APP 86.
  • Non-return (check) valves – in-line spring-loaded, prevent back-flow during pump shutdown.
  • Pump manifolds and flange adapters – interconnect multiple pumps in parallel for larger SWRO trains.
  • Gaskets, O-rings, and seal kits – material options for seawater, brackish, and RO-permeate service.

Frequently Asked Questions

What material are Danfoss pump connections made of?
All seawater-service connections use Super Duplex stainless steel (UNS S32750 / 1.4410). Brackish and wastewater variants may use standard Duplex (UNS S31803 / 1.4462) or 316L.

What pressure rating do these connections support?
Danfoss connections are rated to the maximum working pressure of the parent pump – typically 83 bar (1,200 psi) for SWRO service and up to 140 bar for high-pressure PAH applications.

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