... , Surface: nickel, brass, chrome 3, Handle: long steel hanlde 4, Material:brass Brass ball valve1, Material Valve body stem/ball: brass Cn39Pb3 ... out using pressurised air in a water bath.3. Ball valve handle must be strong enough to withstand a torque of 15kgm ... be achieved through a 90 degree turn of the handle.5.The valve ends near the threaded sides of the ball valves ...