2SH Series: Top-Mounted Duplex Return Oil Filter

The product consists of two single-cylinder filters and a selector valve. One filter operates while the other is on standby. When the operating filter becomes clogged due to contamination, the directional valve can activate the standby filter to continue operation, simultaneously shutting down the contaminated filter and associated oil circuit to replace the filter element, allowing maintenance without system downtime.

Built-in Clogging Indicator and Bypass Valve

When the clogging indicator is in the green range, it indicates the filter is operating normally; when the clogging indicator is in the red range, it indicates the filter is contaminated and blocked. When the pressure difference reaches 52.5 psi (3.5 bar), the indicator sends a switch signal (changes from normally open to normally closed), indicating that the filter element should be replaced or cleaned. If immediate shutdown for replacement or cleaning is not possible, the built-in bypass valve will automatically open when the pressure difference reaches 60 psi (4 bar), preventing further increase in pressure difference, protecting the filter element from damage, and avoiding secondary contamination.

Filter Structure

Installation Diagram

1. The filter element uses long-fiber chemical fiber filtering material, characterized by high filtration accuracy, good impact resistance, large oil flow capacity, low initial pressure loss, and large dirt holding capacity. The filtration precision is calibrated as absolute filtration precision, with filtration ratios β3, 5, 10, 20 ≥ 200, and filtration efficiency η ≥ 99.5%, complying with ISO standards.

2. Standard Product Configuration: Housing and filter head material is aluminum alloy. The matching flanges, selector valve, bolts and nuts, filter element framework, and end cap material is carbon steel. Bypass valve material is ABS; seals material is nitrile rubber; and the clogging indicator model is CYB-1.

3. Two types of clogging indicators are available for selection. Model CYB-I features a visual inspection function, normally open contact, voltage 0~36V, power 20W, not compatible with computers. Model CY-II does not have a visual inspection capability, normally open contact, voltage 0~240V, power 50W, compatible with computers.

Model Parameters

  • ✲ refers to Filtration Accuracy

Dimensional Drawing 

  • ✲ refers to Filtration Accuracy