Adams Automatic Strainers

Cost Effective, Continuous Protection for Downstream Equipment

R.P. Adams Automatic Self-Cleaning Strainers, also called automatic backwash strainers, remove suspended solids, dirt, and debris from many different water streams and process fluids. These strainers work around the clock providing reliable, efficient, un-attended operation.

Adams strainers have a rugged design and are a cost effective solution for continuous protection of downstream equipment, reducing maintenance and downtime for heat exchangers, spray systems, and process equipment.

Benefits at a Glance

  • Continuous protection of downstream equipment with automatic, un-attended backwash operation.
  • Patented multi-element design provides larger surface area than most automatic strainer designs, with greater solids holding capacity and longer intervals between backwash cycles.
  • Strong, corrosion-resistant elements withstand 150 psid differential pressure, collapse or burst.
  • Other internals are also designed to withstand 150 psid dirty pressure drop, protecting downstream equipment from upset conditions.
  • The motor driven backwash assembly operates intermittently, saving energy and wear and tear on moving parts when compared to designs that rotate continuously.
  • Vertical and horizontal strainer configurations and flexible inlet and outlet flange orientations are offered for most sizes, allowing custom arrangements to accommodate installation requirements.


  • Line / Connection Sizes of 4” to 54”
  • 150 GPM to 85,000 GPM flow capacity
  • Separations range from 0.125” to 0.0012” (3200 to 30 µ)
  • Design pressure 150 psig is standard for most sizes, up to 300 psig design is available.
  • Design & construction per R.P. Adams standard design, or per ASME Code CRN, design / construction per Pressure Equipment Directive (PED), and other international codes are available.
  • Materials of construction include cast iron, lined carbon steel, 304L or 316L SS, and super duplex SS. Other materials available upon request.
  • Standard models include control panel, differential pressure switch, and backwash valve. Custom controls are available, such as contacts for DCS monitoring or control, alarm contacts, shear key failure detection, PLC control, transmitters, and special features to meet customer requirements.
  • Strainers with wedge wire media use Poro-Edge, Poro-Reverse and Poro-Axial filter media. These are made with continuous trapezoidal wire, helically wrapped and resistance welded to axial stringers at every intersection with precise tolerances. Elements are exceptionally durable and very strong. As unfiltered water passes through slots in the filter media, solid particles larger than slot openings are retained, allowing only clean filtered water to pass through openings in the elements.
    • Poro Edge continuous wedge wire – General purpose, for most applications. High solids holding capacity.
    • Poro Reverse inverted wedge wire – For applications with aquatic contaminants, sticky substances or solids, and fibrous solids.
    • Poro Axial reverse linear wrap— Linear flow during backwash. For high solids loading.
  • Strainers in the mesh wire media series use Poro-Mesh filter media. Made with sintered mesh over perforated plate or layered mesh, multiple variations are available, including Woven Wire, Metal Fiber and Dutch Weave. The mesh series media selection is determined by the level of filtration required, type of solids and downstream equipment to be protected.
    • Poro- Mesh– For pre-membrane treatment, has uniform openings.


  • Typical recirculating cooling water systems with a cooling tower.
  • Typical lake, river, or pond surface water sources.
  • Widely used to remove debris from recycle streams. Can remove machining chips and unwanted particulate from reusable oils.
  • Filtering chemicals and fuels for impurities