A <a href=http://www.asianvalve.com/forged-steel-ball-valve.html>ball valve</a> (like the butterfly valve, one of a family of valves called quarter turn valves) is a valve that opens by turning a handle attached to a ball valve ... <a href=http://www.asianvalve.com/gate-valve.html>Gate valve</a> manufacturers and distributors directory including stainless steel gate valve, Y-Gate valve, flow control valve, angle gate valve.