Introduction

Adjustable throttle into by way of adjustment: adjustable needle, barrel can debug, adjustable sleeve cage, adjustable hole plate nad wedge adjustable design features.

Using caribide needle and spool valve manufacture, resistant to abrasion, erosion-resistant, corrosion-resistant performance

May play a regulating flow, pressure and close and important role

Needle-type structure is mainly used for Christmas tree equipment, simple structure is manly used for choke manifold.