How to Choose the Blasting Nozzle Shape

When we talk about blasting nozzle shape, it is generally referred to as a nozzle bore shape, which is also called the path inside of the nozzle.

A nozzle’s bore shape determines its blast pattern. The right abrasive blasting nozzle shape can greatly improve your workplace efficiency. Nozzle shape can vary your blast pattern, change the hot spot, or increase velocity.

Nozzles come in two basic shapes: Straight bore and Venturi bore, with several variations of Venturi bore nozzles available.

Straight Bore Nozzles:

Straight bore nozzles are the earliest type of nozzle shape. They have a tapered converging entry, a parallel throat section, and a full-length straight bore and straight exit. Straight bore nozzles create a tight blast pattern for spot blasting or blast cabinet work. It is ideal for smaller jobs such as parts cleaning, weld seam shaping, cleaning handrails, steps, grillwork, or carving stone and other materials.

Venturi Bore Nozzles:

The venturi nozzle is designed in a long tapered converging entry, with a short flat straight section, followed by a long diverging end that widens as you reach the exit end of the nozzle. Venturi nozzles are ideal for greater productivity when blasting larger surfaces.

Double Venturi:

The double venturi style can be thought of as two nozzles in series with a gap and holes in between to allow the insertion of atmospheric air into the downstream segment of the nozzle. The exit end is also wider than a standard venture blast nozzle. Both modifications are made to increase the size of the blast pattern and minimize the loss of abrasive velocity.

As well as the standard straight and Venturi nozzles, BSTEC also supplies angled nozzles, curved nozzles, and nozzles with water jet systems, to suit your specific application.

Angled and Curved Nozzles:

Angled and curved blast nozzles are ideal for when blasting is required inside pipes, behind ledges, flanges of beams, inside cavities, or other hard-to-reach places.

Water Jet System:

The water jet system mixes water with the abrasive inside a chamber within the jacket, reducing the amount of dust placed into the atmosphere. It is ideal for harder abrasives when dust control is needed.

If you want to learn more about abrasive nozzles, welcome to visit www.cnbstec.com