Auto and General Castings Pvt. Ltd. Offers `F` Type Valves. Auto and General Castings Pvt. Ltd. Is an ISO 9002 certified company. `F` Type Valves mainly deal in gas or LPG products or equipments. The raw materials used in manufacturing of these gas valves are brass and steel, which are completely corrosion-resistant. The `F` Type Valves are available in variable models, sizes and variable operating pressure.