HJP|HJB Series

High pressure screw connect poppet & ball couplers made to the ISO 14540 Standard

AKJia’s HJP & HJB Series screw connect couplers are designed primarily for high pressure applications. They can be connected under low residual system pressures. The couplers are available with ball or poppet style valves.


  • Carbon steel with trivalent plating
  • Fitted with Polyurethane & Nitrile seals
  • Option Carbon steel with zinc nickel plating (500 hours with no red rust in salt spray tests)
Datasheet Inquiry
HJP Series ISO 14540 Hydraulic jack quick coupling 720 bar


  • Screw connect design eliminates brinelling
  • HJP offers poppet style valve
  • HJB offers ball style valve
  • Can be connected with low residual pressure in the hydraulic circuit
  • Bidirectional flow


  • High pressure applications (Up to 700 bar for HJB and 1000 bar for HJP)
  • General industrial, construction plant, mobile equipment, demolition and agricultural industries
  • Hydraulic jacks
  • Torque wrenches


HJP and HJB series are quick connectors commonly used on high-pressure hydraulic tools. Their dimensions comply with ISO14540 standards and are used on various hydraulic jacks, hydraulic wrenches and other hydraulic tools.

ISO 14540:2013

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)