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2. Atmospheric vacuum breaker - Wikipedia

   en.wikipedia.org/wiki/Atmospheric_vacuum_breaker

   If the pressure in the "upstream side" is reduced to atmospheric pressure or below, the poppet valve drops and allows air to enter the system, breaking the siphon. [1] One-Inch Brass Atmospheric Vacuum Breaker mounted on PVC Pipe. These devices, since they work on atmospheric principles, cannot be installed in an enclosure containing air ...

3. Schrader valve - Wikipedia

   en.wikipedia.org/wiki/Schrader_valve

   The Schrader company, for which it was named, was founded in 1844 by August Schrader. The original Schrader valve design was invented in 1891, and patented in the United States in 1893. [2] The Schrader valve consists of a valve stem into which a valve core is threaded. The valve core is a poppet valve assisted by a spring. A small rubber seal ...

4. Anderson Greenwood Crosby - Wikipedia

   en.wikipedia.org/wiki/Anderson_Greenwood_Crosby

   Anderson Greenwood Crosby is a US manufacturing company that produces valves for industrial processes, including pressure relief and tank protection valves. The firm was established as Anderson Greenwood in 1947 in Houston, Texas by Marvin Greenwood, Ben Anderson, and Lomis Slaughter Jr to produce a light aircraft, the AG-14.

5. ASME Boiler and Pressure Vessel Code - Wikipedia

   en.wikipedia.org/wiki/ASME_Boiler_and_Pressure...

   Includes Vessels, Pumps, Valves, Piping, Storage Tanks, and Supports; Subsection ND Class 3 components (Those components that are not part of class 1 or 2 but are important to safety) Cooling Water Systems; Auxiliary Feedwater Systems; Includes Vessels, Pumps, Valves, Piping, Storage Tanks, and Supports; Subsection NE Class MC supports ...

6. Drain-waste-vent system - Wikipedia

   en.wikipedia.org/wiki/Drain-waste-vent_system

   Air admittance valves (AAVs, or commonly referred to in the UK as Durgo valves and in the US as Studor vents and Sure-Vent®) are negative-pressure-activated, one-way mechanical valves, used in a plumbing or drainage venting system to eliminate the need for conventional pipe venting and roof penetrations.

7. Dixon Valve & Coupling Company - Wikipedia

   en.wikipedia.org/wiki/Dixon_Valve_&_Coupling_Company

   Dixon Valve & Coupling Company, LLC [1] is a manufacturer and supplier of hose fittings and accessories. The company, often referred to as just Dixon, offers products for fire protection, food processing, dairy processing, beverage and brewery operations, industrial manufacturing, mining, construction, chemical processing, petroleum processing and refining, oilfields, mobile tankers and ...