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Stainless steel Y strainer with female NPT threads

Mueller Steam Specialty

Mueller Steam Specialty 581-SS 3/4" Y Strainer FNPT

SKU CH-JCGD-VVHFB

A 3/4-inch stainless-steel Y strainer with FNPT ends, rated 440 psi at 100 °F and fitted with a 304 stainless screen perforated at .062 inch

  • Handles 1,440 psi at 100 °F for demanding steam lines
  • Class 600 stainless-steel body resists corrosion in water and steam service
  • 304 stainless-steel screen with 0.062 in perforations traps debris reliably
  • 3/4 in FNPT ends install quickly on standard NPT piping
  • 3/8 in blow-off port allows easy cleaning without line shutdown

3/4" Stainless Steel Y Strainer

The Mueller Steam Specialty 581-SS is a Class 600 Y-type strainer built from stainless steel with a 304 stainless perforated screen. It connects via 3/4 inch female NPT threads and suits steam or water lines where debris protection is required. The 0.062 inch perforations trap particles while maintaining flow.

Replaces Clogged or Lower-Rated Units

Swap this in when an existing strainer has corroded, blown out, or cannot handle the system pressure. The jump is worth it if the line sees up to 1,440 psi at 100 degrees F and demands a stainless housing that resists chemical attack better than bronze or iron bodies.

Handles High-Pressure Steam and Water

The strainer comfortably handles saturated steam and water service at the rated pressure and temperature. The 3/8 inch blow-off port allows cleaning without line disassembly. It runs out of capacity when system pressure exceeds the Class 600 limit or when fluid temperatures rise above the 100 degree F rating.

Highlights

  • Handles 1,440 psi at 100 °F for demanding steam lines
  • Class 600 stainless-steel body resists corrosion in water and steam service
  • 304 stainless-steel screen with 0.062 in perforations traps debris reliably
  • 3/4 in FNPT ends install quickly on standard NPT piping
  • 3/8 in blow-off port allows easy cleaning without line shutdown

Specifications

BrandMUELLER STEAM SPECIALTY

Questions about this item

What clearance is needed for the 3 3/4 in length and 4 3/8 in height of the 581-SS strainer?

The body measures 3 3/4 inches long and 4 3/8 inches high; allow extra space for the 3/4 inch FNPT connections and wrench access on the fittings.

Which way should the 581-SS be oriented during installation, and what step is often missed?

Install with the screen basket facing downward so debris collects in the bowl; the step often missed is tightening the blow-off cap on the 3/8 inch port before pressurising the line.

When should the 0.062 in perforated 304 stainless screen be cleaned or replaced?

Clean the screen when pressure drop across the strainer rises noticeably; replace it if the 0.062 inch perforations show distortion, corrosion, or holes enlarged beyond the original size.

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