Sight Glasses & Gauge Valves – Gauge Valve – Model 3500/3510

1/2"-3/4" NPT - 4000 PSI MOP

Recommended for use with Mallard Model 3520 liquid level gauges, and is compatible with all armored flat glass liquid level gauges.


  • Union gauge connection enables gauge removal without removing the gauge valves
  • Stainless steel ball check located upstream of the seat, which instantaneously shuts off flow in case of gauge glass breakage
  • NACE MR0175/ISO 15156 option

If you would like additional information, please click on any literature link below or Contact Us directly so that we may provide you with detailed specifications.




*Product Summary Catalog
PDF Size: 1.2MB
Level Instrumentation Brochure
PDF Size: 1.5MB