FFP Series

Connect under pressure flat face male couplers made to the ISO 16028 Standard dimensions

AKJia’s FFP Series male couplers are designed to connect under pressure by hand with up to 350 bars locked in the male half, making it an ideal choice for applications where the ability to connect under pressure is essential. The FFP Series also benefits from all the key features of the FF Series flat-face couplers.


  • Carbon steel with trivalent plating
  • Option: Carbon steel with zinc nickel plating (500 hours with no red rust in salt spray tests)
  • Fitted with Nitrile seals – NBR (Viton seals – FKM available)
Datasheet Inquiry
FFP Series Under pressure connect Flat face quick coupling male


  • Designed to connect with the FF Series female half
  • Flat faces are easily wiped clean
  • Allows for minimal inclusion of air and contaminants during connection
  • Flat face design prevents fluid loss during disconnection
  • Bidirectional flow
  • Connect under pressure with up to 350 bars locked in the male half
  • Female half must have zero pressure when connecting male half under pressure


  • Hot environments where thermal expansion of trapped oil may take place
  • Hammer circuits
  • High-pressure pulse applications
  • Leak-free environments
  • Construction plant,
  • mobile equipment
  • general industrial
  • nuclear
  • mining
  • agricultural industries
FFH dimensions


The FFP series is a flat-face quick coupling male that can be operated under pressure and can work with the female coupler of the FF series flat quick coupling. Therefore, the connection dimensions of this series also comply with ISO16028:2023 standards.

ISO 16028 -2023

Available Seals and Temperature Range

All carbon steel products have Nitrile Butadiene Rubber (NBR) seals fitted as standard. All stainless steel products have Fluoro-elastomer Rubber (Viton®) (FKM) seals fitted as standard. Special seal materials are available on request.

Abbreviation Trade Name Chemical Name Min. Temp Max. Temp
NBR, XNBR Chemigum®,  Hycar8,  Breon®,  Butakon®, Butacril®, Buna-N®, Perbunan®, Paracril®, Krynac®, Europrene-N®, Nipol® Nitrile Butadiene Rubber
Carboxylated Nitrile Rubber
-40ºC (-40ºF) 106ºC (223ºF)
FKM(FPM) Dai-el®, Fluorel®, Tecnoflon®, Viton® Fluoro-elastomer Rubber -20ºC (-4ºF) 200ºC (392ºF)
EPR, EPDM Buna-AP®, Dufral®, Epsyn®, Nordel®, Epcar8, Keltan®, Royalene®, Polysar-EPDM® Ethylene Propylene Copolymer
Ethylene Propylene Terpolymer
-50ºC (-58ºF) 120ºC (248ºF)
FVMQ Silastic 1S®, FSE® Fluorosilicone Rubber -65ºC (-85ºF) 170ºC (338ºF)
FFKM Perlast®, Kalrez®, Chemraz®, Kaflon® Perfluoroelastomer -25ºC (-13ºF) 300ºC (572ºF)