Asvik Valves Pvt. Ltd. Offers Chemical Corrosion Resistant Ball Valves. Asvik Valves Pvt. Ltd. Is an ISO 9001:2000 registered company. Asvik Valves Pvt. Ltd. Is the manufacturer of rubber lined diaphragm valves and flap type non-return valves. Chemical Corrosion Resistant Ball Valves are suitable for process applications. Chemical Corrosion Resistant Ball Valves are available in several selected series of design and construction. These ball valves are two-way flow and are designed to seal on the downstream resilient seat while under pressure. These are fitted with externals made of cadmium plated steel. For hazardous atmospheres, stainless steel externals ball valves are available on request.