ILM25 Inline Silencers

25 dBA Noise Reduction

Maxim ILM25 silencers will provide a very high level of silencing when properly installed with pressure reducing valves and on centrifugal compressor discharges. These silencers are fabricated in accordance with ASME Boiler and Pressure Vessel Code, Section VIII, Division I.

The ILM silencer utilizes a slightly higher pressure drop than the ILL. This design reduces the ILM package size without significantly sacrificing acoustical performance.

Typical Applications: Pressure reducing valves and Centrifugal compressor discharges


  • Advanced acoustical design
  • All welded construction and long service life
  • Easily installed in any position
  • Prime coated exterior finish

Options / Accessories

  • Flanged inlet and outlet connections
  • Metallic wool packing
  • Various support arrangements
  • Special paint
  • Stainless steel construction

Attenuation Curves

ILM25 Sizes and Specifications

Part No.*C SizeA Max.B Std.B ReducedMax. Operating Pressure
-20°F to 650°F for each design 1⁄16” Corrosion Allowance
Est. Wt.
ILM25-815 ¼5368214; 931949
ILM25-1017 ¼5675188; 8201055
1219 ¼587912167; 7331417
1421¼628614151; 6621540
1623¼659116137; 473; 6041744
1825¼6918126; 434; 5551994
2027¼7120116; 345; 5142291
2229¼7322107; 321; 4782647
2431¼782498; 251; 398; 4473018
Note: Standard silencers do not include diffusers. Dimensions C and D are equal on standard silencers. Data on larger sizes available upon request.
  • All dimensions are in inches. All weights are in pounds. Weights are approximate.
  • Listed sound data is based on typical performance and should not be considered absolute.
  • *See nomenclature guide for additional information on part number creation.

To order or for more information, call us at 800-234-6778 or complete our Contact Form

Silencer Selection & Sizing Program

Find the Right Maxim Exhaust, Wet Exhaust, Intake, Rotary Blower & Vent Silencer for Your Needs

Learn More

Let’s stay
in touch

Sign up to receive Product & Market Updates


Download Silencer