HVAC & Process Cooling
Protects cooling tower and chilled water loops, pumps, and valves from debris to improve system efficiency.
Thompson Strainer (Stainless Steel Liquid Filters)
Custom Pricing
Thompson Strainer (Stainless Steel Liquid Filters)
Patented conical filter screen with large surface area
Less than 1 PSI of pressure loss (clean)
High-quality stainless steel construction
Completely customizable, space-saving design
Price Custom Quote Available
NPT, Grooved & Flanged Connections
Technical Support Included
Materials: Type 304 SS Housing (316 Optional), Type 316 SS Screen Mesh
Technical Specifications
Stainless steel screen filtration engineered for reliable, low-maintenance performance
Parameter
Specification
Available Models
MLS-2 through MLS-14 (2" to 14")
Recommended Flow Range
100 GPM to 4000 GPM (manifold for higher rates)
Max Pressure Rating
125–150 PSI (high-pressure models by special order)
Pressure Loss (Clean)
Less than 1 PSI
Housing & Internal Piping
Type 304 stainless steel (Type 316 optional)
Internal Piping
2"–14" models include internal elbow & riser pipe assembly
Screen Support Frames
Type 304 stainless steel
Screen Mesh
Type 316 stainless steel (standard)
Gaskets
EPDM standard (VITON & BUNA by special order)
Lid Closure
Clamp (2"–4") or Bolted (4"–14"); Swing-Bolt optional
Ports
1/4" NPT gauge & air relief; 1.5" NPT threaded flush (gauges/valves not included)
Standard Models
Each strainer comes with 1/4" NPT gauge and air relief ports and 1.5" NPT threaded flush ports. Pressure gauges and flush valves are not included. *Recommended flow varies depending on solids loading and screen sizing; manifold multiple strainers for higher flow rates. **High pressure and high temperature models available by special order.
Screen Sizes Available
*Heavy-duty mesh recommended for 120, 150 and 200 mesh sizes.
Benefits & How It Works
Hydraulic action and gravity accelerate heavier particles down to the debris reservoir, where they are easily flushed away
Patented Conical Screen
A large-surface-area conical filter screen captures debris efficiently, delivering less than 1 PSI of pressure loss when clean and minimizing operating costs.
Hydraulic Cleaning Action
Dirty water enters the bottom inlet and flows up through the riser pipe. Hydraulic action and gravity drive heavier particles down into the large debris reservoir.
Easy Flush
Accumulated particles are flushed from the strainer reservoir via the 1.5" NPT flush port, while clean water exits through the outlet at the top of the housing.
Stainless Steel Construction
High-quality Type 304 stainless steel housing (Type 316 optional) with Type 316 SS screen mesh for durable, corrosion-resistant performance.
Space-Saving Profile
A streamlined, space-saving design with an easily removable filter lid simplifies installation and screen maintenance.
Completely Customizable
Configurable from 2" to 14" with NPT, grooved or flanged connections, clamp or bolted lids, and a range of mesh and gasket options.
Optional Add-Ons
Any Thompson Strainer can be outfitted for enhanced, automated operation.
Pressure Differential Alarm (PDA2)Automatic Timer Flush (ATF2-150)PDA/ATF-MAX-150 (Powered by MAXIM)MAXIM ControllerMounting Bracket (2" & 3" Models)Leg AssemblyRinse NozzleSwing-Bolt LidPump-Skid Assembly
Frequently Asked Questions
What sizes and flow rates are available?
Standard models range from the MLS-2 (2", 100 GPM) up to the MLS-14 (14", 4000 GPM). Recommended flow varies depending on solids loading and screen sizing, and multiple strainers can be manifolded together for higher flow rates.
What materials are used in construction?
The housing and internal piping are Type 304 stainless steel (Type 316 optional), screen support frames are Type 304 SS, and the screen mesh is Type 316 SS as standard. Gaskets are EPDM by default, with VITON and BUNA available by special order.
What screen mesh options are available?
Standard mesh ranges from 16 mesh (1003 micron) to 200 mesh (74 micron). Heavy-duty mesh options (24x110, 30x150, 40x200, 50x250) and perforated screens are also available, and are recommended for the finer 120, 150 and 200 mesh sizes.
Can the strainer be automated?
Yes. Any Thompson Strainer can be outfitted with a Pressure Differential Alarm (PDA2), an Automatic Timer Flush Package (ATF2-150), or both. The PDA/ATF-MAX-150, powered by Miller-Leaman's proprietary MAXIM controller, monitors differential pressure across the screen and automatically actuates the flush package when the set point is reached.
Get Technical Specifications & Pricing
Receive detailed technical data sheets, application guides, and pricing information
The Right Solution Across Multiple Industries
The Thompson Strainer delivers reliable screen filtration for commercial HVAC, process cooling, municipal, food & beverage, agriculture, and more.
Complete Filtration Solutions
Explore our full range of Miller-Leaman filtration products designed for reliable performance.
Manual Disc Filters
The Helix Disc Filter uses a high-velocity centrifugal action and a large three-dimensional disc surface to remove hard particles and fibrous material. Available in 2", 2" Super and 3" sizes with color-coded discs from 50 to 200 micron.
Need a Custom Filtration Solution?
Our engineering team specializes in creating tailored filtration systems for unique water and liquid handling requirements.
Need Filtration Solutions?
Contact our engineering team for application analysis, product selection, and competitive pricing
For immediate assistance, feel free to give us a direct call at 262-703-0890. You can also send us a quick email at sales@aquapoly.com
For immediate assistance, feel free to give us a direct call at 262-703-0890. You can also send us a quick email at sales@aquapoly.com