Clarifier Parts

SIGMA Engineering and Consulting Associates brings decades of excellence in providing quality parts and services to the Power Generation, Paper, Municipal, Petro, and Chemical Industries.

SIGMA is a full-service corporation in the Water and Wastewater Industry, refurbishing existing equipment such as Clarifiers and Thickeners.

Manufactured aftermarket parts through our Reverse Engineering Service for customers that have water treatment units for:

  • Graver
  • Ecodyne
  • USFilter
  • Envirex
  • Permutit Systems

Manufactured Parts:

  • Shafts - Scraper Shafts, Rake Shafts, Impeller Shafts, Circulator Shafts, Gear and Sprocket Drive Shafts Gears
  • Bearings - Driven and Pinion Bearings, Bearing Housings, Split Bearings, Impeller Bearings, and Guide Bearings,
  • Marine Bearings Liners - Split Liners, Ryertex Liners, Phenolic Liners, and Micarta Liners Sprockets - Driven and Drive
  • Paddles Arms – Scraper Arms and Rake Arms Gear Boxes Graver Clarifiers. Thickeners

Do not discard your worn assemblies or subassemblies!

  • Bearing Housing
  • Gear Boxes

Refurbish Worn Parts

Do not discard your worn assemblies or subassemblies!
SIGMA’s cost-effective refurbishment program can restore your equipment, extending its life for a fraction of the cost of replacing it with new equipment.


SIGMA’S Consultation Services in the areas of Maintenance Management and Equipment Performance will improve reliability.

Give us a call at (732) 356-3046.

Left and Right Scraper Arms

Split Bearing
A black equipment
Scraper Hubs 1
Lower Scraper Shaft Bearing 2
Lower Scraper Shaft Bearing 2
Split Bearings on shaft
Split Bearings on shaft
Split Bearings with Phenolic Liners
Split Bearings with Phenolic Liners
Split Impellers
Split Impellers
Scraper Hub
Scraper Hub
Lower Scraper Shaft Bearing
Lower Scraper Shaft Bearing

Vessel Lids & Strainers

Covers Size in inches Type Max PSI Rating
(depending on Design Temp)
2-3/4 x 3-5/8 Welded Stud/Radius 1000 psi
3-1/2 x 4-1/2 Welded Stud/Anchor 800 psi
4 x 6 Single bolt 1000 psi
6 x 8 Single bolt 660 psi
11 x 15 Double bolt 300 psi
12 x 16 Double bolt 900 psi
14 x 18 Double bolt 600 psi
18 x 24 Double bolt 200 psi

Carbon Filter Strainers are also available