the fully lined ball check valves include the Models 880-150, 880S-150 and 880S-300. These valves are manufactured in sizes 1" to 8" for a variety of pipe line sizes.The liners to our ball check valves are injection molded for better liner life over time. This process creates a uniformly dense thickness of heavy plastic lining ensuring no weakness in the liner. Extremely important is that the plastic is also "locked-in" to the machined dovetail grooves in the metal parts. The spring assisted ball check valves offer high precision to ensure performance and these valves can handle horizontal or any other piping installation oreintation. For detiails about our liner options.We have helped solve the migration problem( the sulfuric acid drawing water back through the check valve) by providing special high rate springs that require approximately a 10 psi differential pressure just to crack the ball off the seat. This insures that there will be adequate seating force and will prevent the "migration" problem. Other PSI rated springs are available for special applications that require it.

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