Valve controller NRS™

Low Flow Gas & Liquid Flow Control Valves The Brooks® NRS™ (non-rising stem) flow control valves are designed specifically for extremely low flow gas and liquid applications. Straight and 90° angle pattern models in stainless steel are available. Ideal for rotameters with needle valves, the line allows needle valve flow control by adjusting a sliding tapered needle. This prevents sticking caused by foreign matter in the fluid. These flow control valves are particularly suitable for precise control requirements and possess a high turns-to-lift ratio. The flow is constant for any given stem position. Six needles with different tapers provide a wide choice of flow ranges. Needles and orifices can be changed without removing the valve body from the line (two different orifices are used, one for needle sizes 1-3, another for sizes 4-6). Features • Smooth non-reversing flow characteristics • Constant flow at any given stem position • Fifteen turns full open to full close provides high turn-to-lift ratio for excellent resolution • Six interchangeable needle tapers, each increases capacity by an approximate factor of three • O-ring seal cannot be damaged by overtightening • Panel mounting nuts included as standard • 1/8" NPT connections integrally machined into body For Use With • Mass Flow Meters • Variable Area Flow Meters Differentiator Designed for Extremely Low Flow Applications Straight and 90° Angle Pattern Models Available Wide Choice of Flow Ranges