For over 60 years, DOMS Incorporated has built a reputation as one of the premier manufacturers of hydraulic suction strainers.

Our products protect the most critical component of hydraulic systems—the hydraulic pump—from damage stemming from contamination. Designed and built for superior performance, our suction strainers ensure consistent and continual system performance, even in the most demanding hydraulic conditions.

Function of Suction Strainers in Hydraulic Systems

Suction Filters and Strainers

Suction strainers are employed in hydraulic systems to remove large contaminants from process fluids that can damage system components. They capture and collect the particulates as the process fluid flows through them.

Within hydraulic systems, suction strainers are generally incorporated within the suction lines to the pump. Compared to other contaminant filtration methods, they are much less flow restrictive, reducing the risk of the suction pressure increasing and causing cavitation within the pump. However, it is essential to regularly remove contaminant buildup from the strainer to avoid clogging up the straining surface area, which can lead to the above problems.

Strainers vs. Filters

Although the terms “strainer” and “filter” are sometimes used interchangeably—largely due to the similarities in their function—they are distinct components with distinct use cases.

Both strainers and filters are employed to remove contaminants from process fluids in hydraulic systems. However, they differ in regard to the size of the particles they allow to pass through them. Strainers are generally used for contaminants that are 50 microns or greater, while suction filters are utilized for contaminants that are smaller than 50 microns (typically 40 microns or smaller).

Types of Suction Strainers From DOMS Incorporated

At DOMS Incorporated, we provide a full line of standard strainer products featuring full-flow and relief valve designs. They have capacity ratings ranging from 5 to 200 GPM, straining capabilities for particulates as small as 10 microns, and minimal differential loss. Additionally, they are available in an extensive range of sizes and accommodate 1/2–4 inch standard male, female, and O-ring connections.

We provide a broad selection of standard strainers, with or without relief valves, as listed in the tables below. Additionally, given the required specifications, we can also fulfill customized suction strainer orders.

Our hydraulic strainers are designed and engineered for versatility and durability, fitting in almost any hydraulic system and meeting some of the most demanding operating and environmental conditions. They are suitable for use in a wide range of industries, including, but not limited to, the following:

  • Agriculture
  • Automotive
  • Construction
  • Forestry
  • Heavy equipment
  • Manufacturing
  • Metallurgy
  • Mining

Features of Our Hydraulic Suction Strainers

All of our strainers feature the following design elements:

  • End caps with original mechanical lock designs. The end caps are flared to achieve a tapered channel construction. Additionally, they are assembled using a high-strength two-part epoxy resin bonding agent, which enables the cap, center core, and element to act as a single unit. This design prevents separation failure in the event the component is subjected to extreme vibration or shock.
  • Round root and crest pleat designs. Our strainers feature a rounded root and crest pleat design that allows for 100% utilization of the straining area. The design also facilitates the cleaning of the strainer when needed, allowing industry professionals to reuse the strainer several times over.

Why Choose DOMS Incorporated?

At DOMS Incorporated, we provide hydraulic filters and strainers for any application or industry. In addition to our standard product lines, we also manufacture custom strainer solutions for any unique specification. Whether it’s a metric or SAE connection, full flow or relief valve requisite, or a standard or non-standard mesh, we will handle your customized requirements. We can also incorporate any type of client-specified hardware into the strainer design.

Almost all our units can be furnished with metal components constructed from high-strength 300 series stainless steel for maximum durability and reliability. We also provide thorough inspection, testing, and evaluation services for new and existing strainer units.

At DOMS, we accept any production challenge. We handle large blanket orders with regularly scheduled shipments for up to 12 months—saving your organization time and considerable cost per unit. To find out more details about our strainer solutions, contact our technical team today.