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Double Bolt Clamps

Rubber Hose

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 Specification

SIZE (INCH)SIZE (MM)MIN–MAX ODBOLT SIZEBAND WIDTHMATERIAL
2"50mm58–65mmM830mm304 SS, Galvanized
3"75mm83–91mmM830mm304 SS, Galvanized
4"100mm108–116mmM835mm304 SS, Galvanized
6"150mm159–167mmM1040mm304 SS, Galvanized
8"200mm209–217mmM1045mm304 SS, Galvanized
10"250mm260–268mmM1050mm304 SS, Galvanized
12"300mm310–318mmM1050mm304 SS, Galvanized