YIGU GROOVED UL FIRELINE Y STRAINERS

OVERVIEW:  The Model YIGU is a ductile‑iron, flat‑face Class 150 Y (wye) strainer with grooved ends that is UL Listed for fire‑protection service. Available in 2"–12" diameters, it protects fire pumps, risers, hydrant mains, and sprinkler lines by intercepting debris before it can foul or damage downstream equipment. The heavy‑wall ASTM A536 65‑45‑12 body is factory‑coated inside and out with an NSF‑/ANSI‑approved red epoxy for superior corrosion resistance and instant “fire‑line” identification. Rated 300 psi WOG @ 100 °F and UL‑tested to 300 psi, the YIGU combines rugged construction with low pressure loss and easy maintenance. Options include fine‑mesh or non‑UL screens, factory‑installed blow‑down valves, gauge‑tap bosses, and with flanged ends with our Model YIFU. 

Stayflow’s new YIGU brings UL Fireline confidence to our proven YCF family—delivering the robust protection you expect, now purpose‑built for fire‑protection piping.

FEATURES

• UL Fireline Certified – Listed for U.S. & Canadian fire‑protection systems (UL Subject 321).
• Large screen‑to‑pipe open area minimizes pressure drop, modeled after Stayflow’s YCF series.
• Robust ductile‑iron body & cover for long service life in demanding installations.
• 304 SS perforated screen welded along the seam for maximum strength and longevity.
• Self‑cleaning capability – NPT blow‑off port (½"–2") with plug; add a drain valve for in‑line flushing.
• Gauge‑tap bosses (optional) allow differential‑pressure monitoring to signal when cleaning is required, just like Stayflow’s YCF/YIFF models.

Complete dimensional data, Cv values, screen‑removal clearances, and pressure‑loss curves are provided in the YIGU Submittal Sheet.