Two hose vs One hose systems

Which Should You Choose?

Dry ice blasting systems generally fall into two types:

  • Single-Hose Systems

  • Dual-Hose (Venturi) Systems

Both systems use compressed air to accelerate dry ice for cleaning. However, they differ in blasting aggression, hose design, and performance. The right system depends on your application, but in most cases, single-hose systems offer superior cleaning efficiency and flexibility.

With Cold Jet’s patented nozzle technology, you’re assured of optimal cleaning results with either system — but especially with the high-performance single-hose models.

Single-Hose Systems

Powerful, Efficient, and Versatile

Pioneered by Cold Jet in 1986, single-hose systems use one hose from the hopper to the applicator. Inside the hopper, a feeder mechanism injects dry ice particles into a compressed air stream, propelling them at high velocity through the entire length of the hose. This design maximizes kinetic energy, resulting in a more aggressive and effective cleaning action.

Advantages of Single-Hose Systems

  • Higher Cleaning Power: Greater particle acceleration enhances impact energy.
  • Longer Reach: Allows use of longer hoses with minimal loss of aggression.
  • Vertical Cleaning Capability: Ideal for cleaning surfaces above or below machine level.
  • Greater Flexibility: Suited for heavy build-up, industrial residues, and high-elevation jobs.

Key Components:

A: Dry Ice
B: Compressed Air
C: Hopper
D: Applicator

Two-Hose Systems

Traditional Venturi-Based Design

Earlier dry ice blasting machines used dual-hose (Venturi) systems. These include two separate hoses — one delivering compressed air to the applicator, and the other carrying dry ice from the hopper to the applicator. When compressed air flows through the applicator, it creates suction in the second hose, pulling dry ice pellets into the air stream. The dry ice and air then combine at the applicator and are expelled onto the target surface.

Characteristics and Limitations

  • Reduced Kinetic Energy: Dry ice particles accelerate only at the applicator, resulting in a less aggressive clean.
  • Limited Hose Length: The suction-based system restricts how far the operator can work from the machine.
  • No Vertical Blasting: Suction must overcome gravity, preventing efficient upward cleaning.
  • Smaller Nozzle Size: Restricted airflow limits the diameter and impact velocity of nozzles.

Key Components:

A: Dry Ice
B: Compressed Air
C: Air & Ice Mixing Applicator