V34500 JB Industries 3/8" OD Extensions UL Listed Ball Valve W/Access Valve Stainless Steel Actuator. JB's ball refrigeration valves have a large port design that provides a minimum pressure drop with straight through flow. Copper end fittings reduce installation time without disturbing the valve. Our new addition ball valves feature stainless steel actuators and a working pressure rating of 700 psi. No bolted or screwed bonnets or flanges to leak. UL listed 32DC.