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NRS Needle Control Valve
Brand: Brooks InstrumentThe 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
Specifications
Brand
Body/Stem Material
- 316 Stainless Steel
Process Connection
- 1/4” Female NPT
- 1/8” Female NPT
Operating Pressure
- Max 1,000 psig
Operating Temperature
- Max 250° F
Orifice Material
- NRS Size 1-3: Stainless steel and Teflon®
- NRS Sizes 4-6: Stainless Steel
- CART III All Sizes: PEEK® (Ceramic)
Valve Needle
- 316 stainless steel
Plunger (NRS)
- Stainless Steel
O-Ring Material
- Viton® Fluoroelastomers, Buna-N
Capacity
- Air: 0.15 to 75.6 SLPM
- Air: 0.01 to 4.51 Nm3/hr
- He: 0.3 to 109.5 SLMP
- He: 0.02 to 6.53 Nm3/hr
- Water: 0.004 to 2.04 LPM
- Water: 0.292 to 147 L/hr
For Use With:
- Mass Flow Meters
- Variable Area Flow Meters
