Shop by Category
API Couplers for Tank Trucks and Railcars
Discover Dixon Valve industry-leading API couplers and components engineered for performance, safety, and longevity. Ideal for railcar and tank truck loading/unloading, our 5500-Series API Couplers ensure reliable connections and reduced downtime through innovative design and field-proven durability.
Product Overview
Connect to API adapters and transfer fuels efficiently with these rugged API couplers. Built for demanding industrial conditions, they feature a modular design that supports various seal configurations to meet diverse chemical and temperature requirements. Suitable for use in fuel loading systems, chemical transfer stations, and bulk liquid distribution. Ideal for operations requiring frequent coupling and uncoupling under harsh service conditions.
•Five-Cam Locking Mechanism ensures reliable alignment and secure connections
•Field-Serviceable Shaft Seals can be replaced without removing the coupler from the loading arm
•4" TTMA Flanged End and ball-end handle provide fast, ergonomic operation
•Fully Interlocked Collar prevents opening while connected for added safety
•Compatible with alternative fuels and suited for a range of high-performance applications
Body & Component Materials:
•Hard-coated anodized 356T6 aluminum
•CF8M stainless steel cams
•Baylast™, EPDM, FFKM, FKM-B, FKM-GFLT, Fluorosilicone, and Hifluor seal materials
Performance Ratings:
•Burst tested: 450 PSI
•Operating temp range: -50°F to 400°F
•Flow rate: 600 GPM at 3 PSI pressure drop, maximum flow rate: 1,000 GPM
Why Choose Dixon?
•API RP1004 Compliant: Meets industry standards for reliability.
•No Tools Needed: Hassle-free maintenance reduces downtime.
•Replaceable Seal Designs: Increase operational uptime and safety.
Complete API Coupler Assemblies Part Numbers
5500-Series API Coupler w/ Baylast seals
Supplier Part #: 5500BL
4” API rack coupler with Baylast seals and aluminum handle
5500-Series API Coupler w/ EPDM seals
Supplier Part #: 5500E
4” API rack coupler with EPDM seals and aluminum handle
5500-Series API Coupler w/ FFKM seals
Supplier Part #: 5500K
4” API rack coupler with FFKM seals and aluminum handle
5500-Series API Coupler w/ FKM-B seals
Supplier Part #: 5500B
4” API rack coupler with FKM-B seals and aluminum handle
5500-Series API Coupler w/ FKM-GFLT seals
Supplier Part #: 5500G
4” API rack coupler with FKM-GFLT seals and aluminum handle
5500-Series API Coupler w/ Fluorosilicone seals
Supplier Part #: 5500F
4” API rack coupler with Fluorosilicone seals and aluminum handle
5500-Series API Coupler w/ Hifluor seals
Supplier Part #: 5500H
4” API rack coupler with Hifluor seals and aluminum handle
Contact Us
Custom Hydraulics and Design
242 Dick Beam Road, Cherryville
North Carolina 28021


