Opta Waive
Blast Cleaning Equipment from Clemco and Marco

Clemlite® Lined Urethane Jacketed Long Venturi

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Clemlite® Lined Urethane Jacketed Long Venturi

Long Venturi: SFR, SMR, SSR, SXR

A blast nozzle accelerates the air and abrasive as the mixture exits the end of the hose. The taper and length of the nozzle's inlet and outlet determine the pattern and velocity of the abrasive exiting the nozzle. The composition of the liner material determines its resistance to wear.

Requirements for Operation

Nozzles are sized by the diameter of their orifices in 1/16-inch increments. A No. 2 nozzle has a 2/16-inch (1/8-inch) orifice, a No. 3 nozzle has a 3/16-inch orifice, etc. The size of the nozzle orifice determines abrasive and air consumption. Air consumption is measured in cubic feet per minute (cfm) at a given pressure.

When choosing a nozzle, consider the amount of available air in cfm, the capacity of the blast machine and the inside diameter of the piping, and the blast and air hoses. For optimal performance, these elements must be compatibly sized.

If too large a nozzle is used, low blast pressure and rapid wear on the blast hose will occur. If too small a nozzle is used, smooth media flow will be difficult to achieve.

Description of Operation

The operator inserts the nozzle washer into a contractor-thread nozzle holder and screws in the nozzle, turning it by hand, until it seats firmly against the washer.

With all related equipment correctly assembled and tested, the operator points the nozzle at the surface to be cleaned and presses the remote control handle to begin blasting. The operator holds the nozzle 18 to 36 inches from the surface and moves it smoothly at a rate that produces the desired cleanliness. Each pass should overlap slightly.

The operator must replace the nozzle once the orifice wears 1/16-inch beyond its original size.


  • Expected life with expendable abrasives is up to 500 hours
  • Durable urethane jacket
  • Non-binding contractor threads
  • 42% lighter than tungsten carbide


Nozzle Model SSR SMR
Mounting Thread 1-1/4" Contractor
Entry Diameter 1" 1"
Liner Clemlite® Silicon Carbide Clemlite® Silicon Carbide
Liner Style Venturi Venturi
Jacket Material Urethane, 70 durometer Urethane, 70 durometer
Nozzle Model SXR SFR
Mounting Thread Contractor *Flanged
Entry Diameter 1-1/4" 1-1/4"
Liner Clemlite® Silicon Carbide Clemlite® Silicon Carbide
Liner Style Venturi Venturi
Jacket Material Urethane, 70 durometer Urethane, 70 durometer
*Flanged nozzle includes quick-coupling nozzle holder

Nozzle Stock Number, Dimensions and Weights

Model No. Stock No. Orfice ID Length Net Wt. Pkg'd Wt.
SFR-6 4732 3/8" 7-5/8" 1 lb 1.5 lb
SFR-7 4733 7/16" 8-3/8" 1.1 lb 1.5 lb
SFR-8 4734 1/2" 9-3/8" 1.3 lb 1.5 lb
Contractor Thread
SMR-3 4538 3/16" 5" .60 lb 1 lb
SMR-4 4539 1/4" 6" .70 lb 1 lb
SMR-5 4540 5/16" 6-3/8" .90 lb 1 lb
SMR-6 4541 3/8" 7-3/8" 1 lb 1.5 lb
SMR-7 4542 7/16" 8-9/16" 1.1 lb 1.5 lb
SMR-8 4543 1/2" 9-3/8" 1.3 lb 1.5 lb
Fine 1-1/4" Thread
SSR-3 4702 3/16" 4-3/4" .50 lb 1 lb
SSR-4 4703 1/4" 6" .70 lb 1 lb
SSR-5 4704 5/16" 6-7/16" .70 lb 1 lb
SSR-6 4705 3/8" 7-3/8" .90 lb 1.5 lb
SSR-7 4706 7/16" 8-7/16" 1.1 lb 1.5 lb
SSR-8 4707 1/2" 9-9/16" 1.2 lb 1.5 lb
Contractor Thread
SXR-6 4601 3/8" 6-13/16" 1 lb 1.5 lb
SXR-7 4602 7/16" 8-1/16" 1.1 lb 1.5 lb
SXR-8 4503 1/2" 9-3/16" 1.3 lb 1.5 lb

Available Literature

21978 - Metal-Jacketed, Silicon Carbide-Lined
21979 - Urethane-Jacketed, Silicon Carbide-Lined
21986 - Metal-Jacketed, Tungsten Carbide-Lined
23414 - Rubber-Jacketed, Tungsten Carbide-Lined
24184 - Metal-Jacketed, Boron Carbide-Lined
24185 - Metal-Jacketed, Tungsten Carbide-Lined CT Series