Profile: Aval Limited deals with low pressure and vacuum equipment. We are an ISO 9001:2000 certified company. Our product line includes flame arresters, regulators and control valves, tank gas blanketing valves & pilot operated vent valves. We offer 2" to 12" pressure vacuum valves, and also up to 24" emergency relief pilot operated vent valves. Our Vacu-Gard® tank gas blanketing valve is a self acting unit which provides solution to valve actuation. It utilizes the upstream supply pressure to actuate the valve, thereby eliminating the need for an external power source. Our series 50 aluminum breather valves are suitable for the protection of common nitrogen blanketed vessels used in storing chemical and petroleum products.