, ,

Mann Tek 4″ Stainless Steel Marine Break-away Coupling Male NPT

Original price was: $9,725.50.Current price is: $4,981.53.

Part Number MSBC400SSMNPT
Material 316 Stainless Steel
Seal FKM (FPM)
Size 4″
DN Size 100.0
Length 13.6″ (345mm)
Width 8.3″ (211mm)
Working Pressure 360 PSI at 70°F (21°C)
Flow 800 GPM (3028 LPM)


  • Coupling is designed to minimize spillage and damage associated with pull away incidents.
  • Typically used in ship-to-offshore platform and ship-to-ship product transfer operations


  • Designed to be installed within a hose string where the coupling will have a length of hose attached to both sides
  • Coupling automatically senses an excessive load, closes the valves and disconnects
  • Release is executed when force causes bolts to break


  • 316 Stainless Steel body
  • FKM O-rings

How It Works

  • The safety break-away valve consists of two halves, each with a valve that has an O-ring seal. When the safety break-away couplings separate, it allows the valves to close. The two valves close rapidly, minimizing exposure to personnel and the environment.
  • Safety break-away couplings have three external break bolts. In the case of axial tension all of the bolts take up the force corresponding to the break force on the hose with a safety margin.
Weight 39 lbs
Dimensions 14 × 8.5 × 8.5 in

Aluminum, Stainless Steel


1", 2", 3", 4", 5", 6", 8"

Scroll to Top