Supplier & Distributor of Double Disc Type Tanker Valves & Double Disc Type Tanker Valve Pattern. Our product range also comprises of Industrial Valves, Cock Valve and Butterfly Valve.Double Disc Type Tanker Valve PatternScrewed in bonnet , non rising stem with locking seal arrangement , screwed female b. S. P ends Maximum working pressure : 14. 06 kg/cm2 (200 psig) Hydraulic test pressure : 21. 1 kg/cm2 (300 psig) Â