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Spray Equipment Transfer Efficiency

Various coating source specific rules in the SCAQMD Rules and Regulations require coatings and adhesives to be applied by specified methods such as electrostatic spray, high-volume, low-pressure (HVLP) spray, roll coater, flow coater, dip coater, etc. in order to maximize the transfer efficiency.

Various coating source specific rules in the SCAQMD Rules and Regulations require coatings and adhesives to be applied by specified methods such as electrostatic spray, high-volume, low-pressure (HVLP) spray, roll coater, flow coater, dip coater, etc. in order to maximize the transfer efficiency. Transfer efficiency is typically defined as the ratio of the weight of coating solids adhering to an object to the total weight of coating solids used in the application process, expressed as a percentage. When it comes to spray applications, the rules typically require the use of either electrostatic spray equipment or HVLP spray equipment. Other coating application methods that have been demonstrated to the SCAQMD to be capable of achieving either 65 percent transfer efficiency or equivalent or better transfer efficiency than HVLP spray equipment (depending on the source specific rule) can also be used after the Executive Officer has given written approval. 

Transfer Efficiency Test Methods

The SCAQMD has developed two documents to assist individuals who want to qualify their spray guns as being capable of achieving 65 percent transfer efficiency or as having equivalent or better transfer efficiency than HVLP spray equipment. Prior to conducting any transfer efficiency testing, a test protocol must be prepared, submitted to the SCAQMD with a Plan Application, and approved by the SCAQMD.

Test Methods for Spray Gun Manufacturers

Spray gun manufacturers who want to demonstrate that their spray gun is equivalent to HVLP spray equipment must use both the test procedure and the equivalency demonstration guidelines below to demonstrate equivalency.

Guidelines for Demonstrating Equivalency with District Approved Transfer Efficient Spray Guns (PDF, 52kb)

Spray Equipment Transfer Efficiency Test Procedure for Equipment User (PDF, 62kb)

Test Methods for Equipment Users

Equipment users who want to demonstrate that a spray gun is capable of achieving 65 percent transfer efficiency or is equivalent to or better than HVLP must use this document only.

Spray Equipment Transfer Efficiency Test Procedure for Equipment User (PDF, 62kb)

Approval Letters for Spray Guns Deemed Equivalent to HVLP

    

Genesi Carbonio 360 Non-HVLP Spray Gun (2/27/19) (PDF, 64 KB)

ITW DeVilbiss GFG-670 PLUS Spray Gun Approval Letter 9-2-2009 (9/2/09) (PDF, 1362 KB)

DeVilbiss TEKNA PRO and TEKNA PRO LITE TE20 Spray Guns Approval Letter (9/18/18) (PDF, 1747 KB)

DeVilbiss TEKNA 7E7 Spray Gun Approval Letter (9/18/18) (PDF, 1869 KB)

DeVilbiss TEKNA PRO and TEKNA PRO LITE TE10 Spray Guns Approval Letter (9/18/18) (PDF, 1765 KB)

SATAjet X 5500 RP Spray Gun (10/26/18)(PDF, 368 KB)

SATAjet 5000 B RP Revised Approval Letter (10/16/15)(PDF, 565 KB)

SATAminijet 4400 B RP Approval Letter (10/16/15) (PDF, 567 KB)

Satajet 3000 B RP Alternative Approval (7/20/10) (PDF, 381 KB)

Satajet 3000 B RP Alternative Approval (7/21/09) (PDF, 348 KB)

ITW DeVilbiss Alternative Approval (6/2/09) (PDF, 333 KB)

ANEST IWATA (2/26/09) (PDF, 21 KB)  

CVI DeVilbiss (12/9/08) (PDF, 12.7 KB)

GTI Pro DeVilbiss (12/9/08) (PDF, 12.6 KB)

ITW Techna (12/9/08) (PDF, 12.6 KB)

SATA Jet3000 (8/23/06) (PDF, 21.5 KB)

Graco/3M (1/21/05) (PDF, 20 KB)

SATA (11/25/03) (PDF, 21.5 KB)

ITW DeVilbiss (8/9/02) (PDF, 20.5 KB)

 

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