The 0154B-200LSB High Flow Upstream Pressure Control Valve features a full scale pressure range of 200 slm of nitrogen, a 1/2 inch Swagelok tube compatible fitting and Buna-N seals. The 154B offers better response time as compared to other high flow control valves. This is possible through the use of a "balanced forces" design that automatically neutralizes the pressure-induced imbalances within the valve.