Armstrong internal check valve model A425B for 213, 813, and 883 inverted bucket traps with a 3/4" pipe and all pressures. Armstrong internal check valves are spring-loaded stainless steel and screw directly into the trap inlet. Check valves are used on Armstrong inverted bucket traps that are installed above any heating unit being drained, or if sudden pressure drops occur in the steam supply to the unit.
200 Series, 800 Series
213, 813, 883
Armstrong is a global company, spanning five generations of family ownership, which manufactures and sells intelligent system solutions for steam, air, and hot water applications across dozens of industry categories such as health care, education, industrial manufacturing, and more. Armstrong offers steam trapping and steam tracing equipment, steam system testing and monitoring products, pressure and temperature controls, water temperature controls, water heating products, hot water process controls, heating and cooling coils, strainers, radiator products, air/gas vents, and more. Armstrong is committed to sustaining the needs of future generations by conserving and saving energy and implements this throughout its product line.