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Raw Water Intake Pumps

Challenge

Issue
Raw water pumps are specified to be coated with NSF 61 approved lining for corrosion protection, as well as ensuring water quality is not impacted by corrosion scale. If left unprotected carbon steel pump components will corrode impacting water quality.

Goal
Prevent corrosion to asset while ensuring compliance to NSF 61 standard.

Product featured in this case study:

  • ARC S1PW – Brush-roll-spray applied moderate chemical resistant coating – NSF 61 Certified

Chesterton ARC S1PW

 

Solution

Preparation

All surfaces grit blasted to SP10 cleanliness with an angular profile of 3+ mils

Application

  1. ARC S1PW ‘stripe coat’ applied to weld seams and angles at 10-15 mils WFT.
  2. Immediately following stripe coating, two subsequent coats of S1PW were applied in alternating colours to a final DFT of 30-45 mils in compliance with NSF approval.
  3. Final film was holiday tested for ‘pin hole’ free condition.

Pump barrel outside booth awaiting grit blast

Pump barrel outside booth awaiting grit blast

Final film finish as applied

Final film finish as applied

Coated barrel being installed

Coated barrel being installed

ARC S1PW is designed to:

  • Provide excellent barrier protection against abrasion, corrosion and chemical attack
  • Extend wear and predictable maintenance
  • NSF 61 certified as a protective barrier layer for the internals of tanks, pumps, valves and fittings where potable water exposure exists and NSF certification is required
  • NSF 61 for use on the internals of pipes with a diameter of 1/2 inches or greater
  • NSF 61 for use on the internals of tanks >=1,500 US gal (5678 Litres)

Results

Client Reported:

  • Project completed on time and pumps installed by client (City of Houston TX) in spring 2019.
  • As of 2022 no reports of coating failure have been received. Expected liner life is >15 years.

About Us

Chesterton® ARC coatings are specifically formulated and engineered to be used in a wide range of harsh environments and conditions.

With outstanding adhesion, superior mechanical strength, excellent permeation, chemical and wear resistance, 100% solids and solvent-free, the available range of Chesterton ARC coating will help you protect your investment.

Chesterton® is a world leader in helping process industry companies and manufacturers improve the reliability and efficiency of their rotating, stationary, and fluid power equipment platforms. We are known across a wide range of industries for our award-winning pump and valve sealing solutions, applications expertise, equipment maintenance and wear-prevention products, and knowledgeable hands-on local service. Chesterton product range includes mechanical seals, packing and gaskets, industrial lubricants and coatings.

® Registered trademark owned by A.W. Chesterton Company

Issued 09/2021.

Technical data reflects results of laboratory tests and is intended to indicate general characteristics only. A.W. Chesterton Company disclaims all warranties expressed or implied, including warranties of merchantability and fitness for a particular purpose. Liability, if any, is limited to product replacement only. Any images contained herein are for general illustrative or aesthetic purposes only and are not intended to convey any instructional, safety, handling, or usage information or advice respecting any product or equipment. Please refer to relevant Safety Data Sheets, Product Data Sheets, and/or Product Labels for safe use, storage, handling, and disposal of products, or consult with your local Chesterton sales representative.

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