http://news.yahoo.com/world-class-valve-manufacturer-prosave-heading-overseas-expansion-070054730.htmlWorld Class Valve Manufacturer PROSAVE Heading for Overseas Expansion
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PROSAVE is a world class industrial valve manufacturer, specialized in manufacturing and supplying explosion relief valves for power plants, maritime plants and vessel plants. They hold world renowned certifications including classification societies such as ISO 9001:2008, Achilles JQS, DNV, GL, KR, MAN Diesel & Turbo, NK, RINA, BV, LR, CCS, and ABS. They invented and manufactured their featured ‘Crankcase Explosion Relief Valve for diesel engine’ the third in world.
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‘Air Release & Vacuum Breaker Valve’ is mainly installed at power plant, water desalination plant, and maritime plant. Its main function is to control the air pressure in the pipe by releasing the air out of the pipe for the prevention of damage of the pipe and the pump.
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‘Vacuum Breaker Valve’ is mainly installed at power plant, water desalination plant, and maritime plant. Its main function is to prevent the damage of the pipe and tank when it becomes vacuumed state by inpouring air in the atmosphere.
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since we are the ones paying for the replacement valves it would help to know something about them.
I'm not recommending this company, just putting this info out there.
knowledge is power.