420 CALM Buoy Swivel

FPS Swivels

The Model 420 CALM buoy swivel provides a rotating connection for low power (600 V/50 A) and signal cables. Cable entry is by connectors or through integral junction boxes. It is intended for use in Catenary Anchor Leg Mooring (CALM) buoys and similar installations.

This model has no hollow bore, so it must be located at the top of a swivel stack. This also makes it the swivel of choice when a fiber optic rotary joint is required. If a hollow bore is required, use the Model 440.

The swivel is certified as a flameproof enclosure with flameproof connectors or increased safety junction boxes on the ship side (Ex de). It is certified for use with intrinsically safe circuits (Ex de[ib]). Ingress protection is IP66/IP68-20 m.

All Focal 400 Series products are intended for use in swivel stacks of Floating Production Systems (FPS). They are well suited for any application requiring a product that can withstand harsh marine conditions or require long life with minimal maintenance intervals. Designed and manufactured in our ISO 9001 facility under our project management system, products have a two year warranty and are provided with a complete document package.

All products can be modified to meet specific requirements. Installation, commissioning and service is available. Contact our FPS swivel experts for details.


  • 316 stainless steel housing
  • Hazardous area certified
  • Maritime classification
  • Voltages to 690 V
  • Currents to 50 A
  • IP66 / IP68-20 m
  • Temperature: -20°C to +60°C