High Pressure Needle Valve, SS 316, DN8, 6000 PSI, FNPT

Product Name: High Pressure Needle Valve
Body Material: Stainless Steel SS 316
Size: DN8, 1/4 Inch
Pressure: 6000 PSI
End Connection: FNPT
Operation: Manual

The internal thread high-pressure needle valve is a precision valve designed for fine-tuning and controlling the flow rate. It features a needle-shaped valve plug that allows gradual and continuous adjustment from fully closed to open. The needle valve plug is typically made of quenched steel, while the valve seat is composed of softer materials such as tin or copper to ensure proper sealing. The valve's sealing is achieved by the tight fit of the conical surfaces of the needle and valve seat. The valve needle comes with two types of taper: 1:50 and 60 cone angles, both of which require precise grinding to ensure a tight seal. Additionally, the sealing between the valve stem and valve seat is accomplished through corrugated pipes for added durability.

Technical Specifications

» Pressure Environment: High Pressure
» Temperature Range: -54°C to 316°C (-65°F to 600°F)
» Valve Size Range: 
   Imperial Size: 1/8-1 Inch
   Metric Size: M6-M28
» Connection Form: Internal Thread
» Main Materials: Copper, SS 304, SS 316, Carbon Steel, and special materials
» Circulation Capacity: 0.4 to 1.2

Product Features

» Easy Installation and Disassembly: Needle valves offer simple installation and removal, ensuring a tight connection. They are also designed to be fire-resistant, explosion-proof, and highly pressure-resistant, with excellent sealing performance. These features make them ideal for use in power plants, refineries, chemical plants, and instrument measurement pipelines.
» Long Service Life and Easy Maintenance: With good sealing performance, needle valves offer a long lifespan. Even if the sealing surface is damaged, only the vulnerable parts need replacement, allowing continued operation. When installing the internal thread high-pressure needle valve, the flow direction of the medium must align with the arrow on the valve body.
» Wide Range of Applications: Needle valves are highly versatile and are used in various applications, including controlling flame temperature in flame cutting processes. In instrument measurement pipeline systems, needle valves, such as globe and ball valves, are crucial components for regulating or cutting off the pipeline passage.