2017 hot sale general utility needle valve with high quality

الوصف

~General utility service needle valve (NU series)
1. Max working pressure:
Stainless steel: **4 bar (***0 psig)
Alloy C***6:  **4 bar (***0 psig)
Alloy **0:    **5 bar (***0 psig)
Ti:          **1 bar (***0 psig)
Brass:       **7 bar (***0 psig)
2. Temperature:
PTFE packing: **4°C to **2°C (**5°F to **0°F)
Graphite packing: **4°C to **9°C (**5°F to ***0°F)
3. Two stem design, special hardened upper stem threads, rolling hardened surface of the lower stem.
4. Lubricant of the upper stem threads is separate from medium.
5. Up and down motion of the lower stem instead of the rotating movements reduces the wear of the packing and avoid the galling between seat and head.
6. The valve has back sealing function in full open position.
7. Panel installation.
8. Two handle pins make the handle firmly and lastingly.
9. Diverse colors of the handle are available.
*0. Every valve is **0% factory tested with nitrogen.