Brooks NRS Flow Control valves are designed for gas and liquid applications with the lowest flow rates. Available in stainless steel straight and 90° Angle. This series is ideal for rotor flowmeters with needle valves. The needle valve flow can be controlled by adjusting the sliding conical needle. This prevents adhesion caused by foreign objects in the fluid. These flow control valves are especially suited for precise control requirements and have a high turn to lift ratio. The flow rate is constant for any given stem position.