Overview

Polytech’s gravity bed filters offer automatic operation and use low cost bulk roll filter media. They are well suited to applications with moderate contaminant levels. Gravity bed filters are a great, reliable filtration solution with no seal maintenance.

Applications

  • Creepfeed Grinding
  • Surface Grinding. Rough: 63 rms & Above
  • Surface Grinding. Medium: 32 - 16 rms
  • Internal & Centerless Grinding
  • Abrasive Belt Grinding
  • Cutoff Saws

How it Works

Contaminated liquid flows through non-woven synthetic filter fabric supported by the conveyor belt.

As filtered contaminants restrict the liquid flow, the liquid level rises and actuates a float switch which starts the conveyor.

Unlike so-called “deep bed filters” which utilize a submerged edge seal to prevent contaminated coolant from leaking directly into the filtered coolant tank, the filter paper contains the entire pool of liquid and filter paper is transported beneath the liquid. You get reliable filtration without seal maintenance.

Design and Customization

Gravity filters are available as filter chassis only or fully outfitted with tank, pump and electrical controls. Gravity filters may be combined with other filters and separators such as:

  • Magnetic Separators
  • Cartridge Filters
  • Depth Filters

to meet process and clarity goals. Speak to one of our engineers about your specific needs.

Contact Us

This nine square foot filter is rated for up to 26 gallons a minute. Shown with optional tank, pump and electrical control panel.

Specifications

Model Filter Area (Sq. Ft.) Rated Flow
(GPM, max)
Media Width Basic Dimensions (in)
L x W x H
PG3 3 11 19 51.2 x 22.8 x 17.3
PG4 4 13 19 63 x 22.8 x 17.3
PG9 9 26 27 68.9 x 30.7 x 17.3
PG13 13 40 39 72.8 x 42.5 x 17.3
PG18 18 53 39 92.5 x 42.5 x 17.3
PG29 29 66 39 112.2 x 42.5 x 17.3
PG32 32 92 55 122 x 59.4 x 17.3
PG41 41 119 55 141.3 x 59.4 x 17.3
PG48 48 145 55 161.4 x 59.4 x 17.3
PG56 56 172 55 181.1 x 59.4 x 17.3
PG64 64 198 55 200.8 x 59.4 x 17.3
PG71 71 225 55 220.5 x 59.4 x 17.3