วาล์วปิด-เปิด รูเข็ม ใช้ควบคุมแรงดัน ในระบบท่อส่ง ก่อนเข้าเกจ์วัดแรงดัน ช่วยลดความเสียหาย หรือยืดอายุการใช้งานของเกจ์วัดแรงดันในยาวนานขึ้น

การต่อ 1/4" NPT ทำด้วยทองเหลือง

These valves are used to closely regulate line flow. However, they may be used as a throlling device on lines where rapid and excessively pulsating pressure would tend to effect the gauge performance or mechanism.

Size: 1/4 NPT
Material: Brass
For oil, water, gas, etc.
Pressure & temperature rating: 600 psi @150 C (300 F)

A needle valve is a type of valve that can control the flow of a substance through an appliance or system, commonly gas or water. Needle valves allow the valve to open slowly and partially, which is advantages since it does not shock the instrument to which it is attached. . Incorporating a small plunger with a needle-like shape is the value's distinguishing feature. The plunger has a little handle, known as a handwheel, that allows the valve to be turned quickly and precisely. The elongated end of the valve, when fully attached, fits perfectly into the seat, a components of the appliance being regulated. However, when the valve is turned, the space between the needle and the seat opens up, allowing just a tiny amount of substance to travel through the needle valve.