Union Bonnet Needle Valves

详情

Union Bonnet Needle Valves
*2N Series and *2HN Series

Maximum working pressure:
*2N series: 
Stainless steel : 6 **0 psig (**4 bar )
Alloy C***6: ***0 psig (**4 bar )
Alloy **0: ***0 psig (**5 bar )
Titanium: ***0 psig (**1 bar )
*2HN series: ****0 psig (**9 bar )
Working temperature:
PTFE: - *5 F to **0 F (- *4 C to **2 C)
PEEK: - *5 F to **0 F (- *4 C to **0 C)
Graphite: **5 F to ***0 F (- *4 C to **9 C)

Features:
1.Two-stem design: thread hardened upper stem and smooth surface 
hardened lower stem.
2.Accidental valve disassembly disabled by union bonnet  construction
3.Upper stem thread lubricant isolated from system media
4.Linearly instead of helical movement of the nonrotating lower 
stem, avoiding galling damage to the seat and tip, as well as 
reducing the total friction area between the packing and the
lower stem
5.Safety back seating seal in fully open position
6.Panel mounting available as an option
7.Steady and durable fastening of the handle by double  lock-pins
8.Handle of different colors available for option 
9.Leak-tight performance testing for every valve with nitrogen at the maximum
working pressure, but not higher than ***0 psig