Overview
Double Bolt Clamps (sometimes called Heavy-Duty Band Clamps) are robust hose-clamping solutions designed for more demanding or higher-pressure applications than single bolt alternatives. With two bolts providing uniform tension around the hose, these clamps ensure a secure and leak-resistant connection—a critical requirement in dewatering, construction, industrial fluid transfer, and other heavy-duty setups.
Key Uses & Applications
Dewatering & Drainage
- Securing high-capacity suction hoses in wellpoint systems or large-scale pump installations
- Reliable under moderate to high vacuum pressures and frequent site relocations
Construction & Earthworks
- Fastening lay-flat discharge hoses, rigid suction pipes, and couplings on busy worksites
- Offers extra assurance of leak-free performance in harsh or vibrating conditions
Mining & Industrial Slurry
- Withstands higher pressures and heavier hose wall thickness commonly seen in slurry pumping
- Double bolt tensioning ensures hoses remain fixed, even when pumping abrasive materials
Agricultural Irrigation
- Firmly clamps PVC or rubber hoses for large-volume irrigation lines
- Minimizes hose slippage under strong water flow or variable terrain stress
Municipal & Flood Control
- Deployed in emergency setups for floodwater diversion or storm drainage
- Double bolt design helps maintain a tight seal over prolonged pumping operation
Product Highlights
High-Strength Metal Construction
- Typically made from galvanized steel or stainless steel (304/316) for corrosion resistance
- Thicker band material for added rigidity compared to single bolt clamps
Two Bolt Tightening Mechanism
- Allows more uniform compression around the hose's circumference
- Distributes clamping force evenly, reducing the chance of leaks or hose damage
Heavy-Duty Band Width
- Often wider than single bolt clamps, providing increased surface contact
- Ideal for thicker-walled or large-diameter hoses found on high-flow jobs
Excellent Vibration Resistance
- Two bolts mitigate loosening under mechanical vibration or pump pulsations
- Suitable for demanding industrial or construction environments
Multiple Size Ranges
- Manufactured for hose diameters from ~2" up to 12" (or larger, model-dependent)
- Versatile inventory solution for contractors handling a range of fluid transfer tasks
Technical Specifications
| Clamp Type | Double Bolt Hose Clamp |
| Material | Galvanized Steel, Stainless Steel (304/316) |
| Size Range | Typically 2" – 12" outer diameter coverage (other sizes on request) |
| Band Width | ~30–50 mm (depends on clamp size and mfr.) |
| Bolt Size | Often M6, M8, or M10 (metric) or ¼", 5/16", 3/8" (imperial) |
| Corrosion Protection | Zinc-plated, Galvanized, or Polished Stainless Finish |
| Torque Rating | Dependent on clamp diameter & bolt size (e.g. 15–40 Nm typical) |
| Operating Temp | -20°C to +200°C (material-dependent) |
| Max. Pressure | Application-dependent; handles higher pressures than single bolt clamps |
Benefits & Advantages
Enhanced Clamping Force
Two bolt points apply uniform circumferential pressure, reducing leak risk even under higher pressures
Robust & Durable
Thicker band and double bolt design resist mechanical stresses and fluctuations in pump suction/discharge lines
Versatile Usage
Ideal for heavier or larger diameter hoses in dewatering, oilfield, or industrial applications
Reduced Hose Slippage
More contact area and dual locking points minimize the chance of the hose loosening over time
Longer Service Life
Corrosion-resistant finishes and sturdy construction allow repeated reuse across multiple projects
Size Specifications
| Size (Inch) | Size (mm) | Min-Max OD | Bolt Size | Band Width | Material |
|---|---|---|---|---|---|
| 2" | 50mm | 58-65mm | M8 | 30mm | 304 SS, Galvanized |
| 3" | 75mm | 83-91mm | M8 | 30mm | 304 SS, Galvanized |
| 4" | 100mm | 108-116mm | M8 | 35mm | 304 SS, Galvanized |
| 6" | 150mm | 159-167mm | M10 | 40mm | 304 SS, Galvanized |
| 8" | 200mm | 209-217mm | M10 | 45mm | 304 SS, Galvanized |
| 10" | 250mm | 260-268mm | M10 | 50mm | 304 SS, Galvanized |
| 12" | 300mm | 310-318mm | M10 | 50mm | 304 SS, Galvanized |