NB Series Screwed Bonnet Needle Valves
Screwed Bonnet Needle Valves NB Series
Screwed Bonnet Needle Valves NB Series
◎ Working pressure up to 6000 psig
◎ Two piece stem design: Upper stem threads cold rolled and lower stem hardened for high strength and smooth operation
◎ Cold drawn bar as body
◎ Upper stem thread lubricant isolated from system media
◎ Linear instead of rotary motion of the rising, non-rotating stem minimizes packing abrasion and reduces the friction between the seat and the tip
◎ Safety back seating seal in fully open position
◎ Panel mounting available
◎ Steady and durable fastening of the handle by double lock-pins
◎ Handles of different colors available
◎ Every valve leak tested with Nitrogen or compressed air at the maximum allowable working pressure
◎ NB Series Needle Valves are standard without panel mounting, add Y to the ordering number for panel mounting.
Features
◎ Working pressure up to :
Stainless steel: 6000 psig (414 bar)
Alloy C-276: 6000 psig (414 bar)
Alloy 400: 5000 psig (345 bar)
Titanium: 3500 psig (241 bar)
Brass: 3000 psig (207 bar)
◎ Working temperature:
PTFE: -65°F to 450°F(-54°C to 232°C)
PEEK: -65°F to 500°F (-54°C to 260°C)
Graphite: -65°F to 1200°F (-54°C to 649°C)
When the connection type of valves is FITOK double ferrule tube fitting,the working pressures of the valves are related to the wall thickness of tubing applied. For specific working pressure of the valves.
