API Loading Coupling with bonded nose sealAPI Loading Couplings and adapters are engineered for dependable rail car and tank truck loading and unloading. Couplers are available with a variety of nose seal materials to ensure compatibility with a number of alternate fuels and fluids. Seals can be bonded (not removable, cannot be washed away) or replaceable (remove and replace without removing from the loading arm).  5-cam design for easy alignment and tight connection.  4″ TTMA flange outlet.  Limited 5 year warranty (wear and tear / seals excluded). The maximum flow rate is 1000 GPM.

Fully coAPI Loading Couplingsmpliant with API RP1004:2003 specifications

Load only or load/unload adapter valves offered with or without sight glass included

  • Chemical Compatibility (FKM-B seals): – gasoline – diesel – jet fuel – avgas – 100% ethanol – 100% methanol – 100% biodiesel – any blend of the above fluids – crude oil
  • Chemical Compatibility (Buna seals): – gasoline – diesel – avgas – 100% ethanol – 100% methanol – B2 to B20 biodiesel blends
  • Pressure drop of only 3 to 4 PSI
  • Replacement parts and locking handle available

Also see our Loading Arm Assemblies and Tank Car Unloading Assemblies


WARNING: Cancer and reproductive harm. Visit www.P65warnings.ca.gov for additional information.
  • Per Section 1417 of the Safe Drinking Water Act (SDWA) use Lead free parts in all consumable water applications.  Lead free refers to the wetted surface of pipes, fittings and fixtures in potable water systems that have a weighted average lead content = 0.25%. Source: California Health & Safety Code (116875). Vermont Act 193*171NLF
    Please contact us for a limited assortment of lead-free products