OPW Engineered Systems
Scissor-Style (SCI) Top Loading Arm
Description:
Scissor-Style (SCI) Top Loading Arm
Coupling Category:
Top Loading Arms
Primarily used to load tank trucks where the reaches will be less than 120” (3,048 mm).
This versatile arm is designed specifically for top-loading installations where a variable
operating range is required. The secondary arm rotates 360 degrees in the horizontal
plane, providing a spotting allowance of up to twice its length.
Features & Benefits:
- 3" and 4" sizes
- Ductile Iron/Aluminum Construction
- 3000 Series Swivel Joints
- Simple, Proven Design
- Ductile Iron/Aluminum Construction
- Low-Temperature Fluorocarbon Seals
- Wide Compatibility
- 790 EZ Adjust Counterbalance
- Safe, Easy Spring Adjustment
- Integral Upward, Downward Travel Stops
- Available with Loading Valve
- Safety Closure will automatically close if left unattended
- Remote Control Linkage allows operator to actuate valve
while on truck
Technical Features
| Materials |
Ductile Iron/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 |
70º to -20º (from horizontal) |
| Typical Horizontal Spacing |
24" (610 mm) |
| Typical Vertical Spacing |
15" (381 mm) |
| Typical Reach (radius) |
60" to 108" (1,524 mm to 2,743 mm) |
| Nominal Diameter |
3" and 4" |
| Typical Flow Rates (Velocities < 15 ft/sec (7.5 m/sec)) |
300-600 GPM (2,000-3,500 LPM) |
Materials of Construction
| Inlet Flange |
4" 150 ANSI ASTM A105 |
| Inlet Swivel |
Carbon Steel ASTM A105 |
| Piping |
Sch 40 Aluminum ASTM B241 |
| Apex/Drop Tube Swivel (p/n 3640FT-0402) |
Aluminum ASTM B26 A356 T6 |
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/Ductile Aluminum 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 |
| Factory Assembly, Testing & Boxing (ATB) |
If this option is selected, Loading Arm would be fully assembled,
tested, and shipped in protective wooden crate. Note: It may be necessary
to ship Loading Arm in sections to accommodate crating, shipping and
rigging. Arm will be shipped as fully assembled as possible. |
Accessories:
| Bolt-On Handle, Alum. |
BOH-S-3 |
BOH-S-4 |
| Bucket Hook |
BH-3 |
BH-4 |
