Aquatrol Valve Company Aquatrol Safety and Relief Valves


Phone: 847-356-0566   Fax: 847-356-0747      E-Mail:


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Liquid relief, liquid by-pass and over protection

Series 69, 51, and 55

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Sizes from 1/4" to 3" Pressure To 600 Temperatures to 450°

Aquatrol Liquid Relief, by-pass, and over protection Series 69, 51, 55
Series 69 is an industry standard Valve for liquid relief, liquid by-pass and over protection. Series 51 and 55 are generally used where size or spacing is a factor + high pressure settings.
• Liquid relief and overprotection
• By-pass relief
• Continuous relief
• Pressure regulation
• Pumping systems, tanks and hydraulics
• Fluid lines
• Oil fields and chemical processing
• Ruggedly constructed
• Metal-to-metal/precision lapped seating
• Closed hex cap
• Factory set and sealed (can also be field adjusted)
• Variety of inlet and outlet options
• Fixed blowdown
• Closed Bonnet Design to minimize leakage
• Wheel handle
• Variety of inlet and outlets
• Stainless steel inserts for corrosive or higher pressure protection
• Polishing and chrome plating



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