Product Introduction
1. Two section valve stem design, with the upper valve stem thread treated with special modification and the lower valve stem surface polished.
2. The up and down movement of the lower valve stem replaces rotating lifting, greatly reducing the total friction area of each stroke.
3. The non rotating lower valve stem avoids scratching the valve tip and seat during the valve closing process due to compression rotation.
4. The lubricating grease on the upper valve stem thread is isolated from the medium.
5. The valve has a back sealing function in the fully open position.
6. Can be panel mounted.
7. The handle is locked with screws, which is stable and durable.
8. The color of the handle is optional.
9. Each valve undergoes a sealing test with nitrogen gas at its rated working pressure before leaving the factory.

Needle valve characteristics:
1. Cold drawn square bar or forged valve body.
2. Valve body material: 316, 316L, 304, 321 stainless steel, F91， Dual phase steel 2205, titanium, Monel, Hastelloy, and brass are available for selection.
3. Sealing material: Same as the valve body or Stellite alloy.
4. Valve tip types: ladder type, ball type, regulating type, and soft valve tip are available for selection.
5. Interface: 1/8 to 1, M14 to M27 thread.
6. Inner diameters of 4mm, 6mm, 11mm, 15mm, and 20mm.
7. Maximum working pressure: 413 bar (6000 PSI).
8. Working temperature: -54 ℃ to 649 ℃ (-65 to 1200 ° F)