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OPW Engineered Systems
A-Frame Hose (AFH) Bottom Loading Arm

A-Frame Hose (AFH) Bottom Loading Arm

Vendor: OPW Engineered Systems

Coupling Type: StandardLine Loading Arms


A-Frame Hose (AFH) Bottom Loading Arm

Coupling Category:

Bottom Loading Arm

AFH Order Guide

The AFH is ideal for those applications with lower riser heights. Its simple yet robust design has provided decades of reliable service. Its compact design makes it ideal for loading islands where the arm needs to serve both sides of the platform. Also a good choice for vapor-recovery applications.

Features & Benefits:

  • 3000 Series Swivel Joints
    • Simple, Proven Design
    • Carbon Steel/Aluminum Construction
    • Low-Temperature Fluorocarbon Seals
    • Wide Compatibility
  • 790 EZ Adjust Counterbalance
    • Safe, Easy Spring Adjustment
    • Integral Upward, Downward Travel Stops
  • Braided Stainless Steel or Rackmaster Composite Hoses
  • Available with Lynx Bottom Loading Coupler
  • Available in 3” and 4” Sizes
  • Stores in Upright, Near-Vertical Position

Technical Features

Materials (CA) Carbon Steel/Aluminum
Seals Low-Temp Fluorocarbon
Working Pressure 80 PSI (5.5 Bar)
Test Pressure 120 PSI (8.2 Bar)
Operating Temperature -20ºF to 140ºF (-29ºC to 60ºC)
Up/Down Angular Movement 45º to -15º (from horizontal)
Typical Horizontal Spacing 26" (660 mm)
Typical Vertical Spacing 15" (381 mm)
Typical Reach (radius) 60" to 80" (1,524 mm to 2,032 mm)
Nominal Diameter 3" and 4"
Typical Flow Rates (Velocities < 15 ft/sec (7.5 m/sec)) 200-600 GPM (757-2271 LPM)
Weight ~275 lbs*
*Estimated weight for entire Loading Arm (72" Reach). Weight can vary depending on selected options.

Materials of Construction

Inlet Flange 4" 150 ANSI ASTM A105
Inlet Swivel Carbon Steel ASTM A105
Primary Arm Piping Sch 40 Aluminum ASTM B241
Apex Swivel (p/n 3640FT-0402)
Aluminum ASTM B26 A356 T6
Drop Hoses
(H31781M) Rackmaster Composite, TTMA Ends 3"x57"
(HX108471) Rackmaster Composite, TTMA Ends 4"x57"
Coupler Swivel (p/n 3635FTH-0402) Aluminum ASTM B26 A356 T6
Isolation Valve (LBV450VGL) Cast Aluminum/Fluorocarbon
Spacer Spool (p/n VSS4) Cast Aluminum
API Coupler (p/n 1004D3, Lynx852VG)


Low-Temp Fluorocarbon

Additional Information

Weld Protection Per the ASME Boiler & Pressure Vessel Code Section IX
Radiograph/X-Ray Per OPW Standard, 5% random/factory lot
Testing All assembled Loading Arms shall be tested to 1.5X the rated design pressure.
Surface Treatments All Carbon Steel components to be protected with a 2-part paint process. Aluminum components to be unpainted.
Lubricant OPW 880 High-Performance Synthetic Lubricant
Gasketing KlingerSil C5400

Recommended Spare Parts List**

Part # Description Where Used Qty/Arm
3000RK-0402 3000 Series Swivel Seal Kit, 4" Fluorocarbon All Swivels (Counterbalance, Apex, Coupler Swivels) 4
1004D3SRK-0402 Coupler Seal Repair Kit, 4" Fluorocarbon 1004D3-0402 (API Coupler) 1
**Other seal kits/materials available upon request
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