The FK Series offers the superior strength and excellent chemical resistance needed to operate in the corrosive environments often found near flanged connections. This Normally Open Pneumatic Spring Return Wafer Style Check Valve features a special trapezoid shape of the liner and a serrated body cavity to guarantee a bubble-tight seal while keeping breakaway torque at an absolute minimum. The body is made of corrosion-resistant aluminum and can handle pressure up to 150 psi at 73 degree F (22.8 degree C) depending on the size. It is available in 1-1/2", 2", 2-1/2", 3", 4", 5", 6", 8" 10" and 12" sizes. Show More Show Less
