Definition of Bellows-Sealed Needle Valve

A bellows-sealed needle valve is a type of valve commonly used in industrial pipeline systems. It is made of stainless steel, featuring excellent corrosion resistance and high-temperature resistance. The key characteristic of this valve lies in its internal bellows structure, which can effectively prevent medium leakage while withstanding high pressure and temperature.

Characteristics of Bellows-Sealed Needle Valve

Excellent sealing performance: The sealing performance of the bellows is superior to that of traditional packing seals, which can effectively prevent medium leakage and ensure the safe operation of the pipeline system.

High-temperature resistance: Imported stainless steel bellows-sealed needle valves can operate stably for a long time in high-temperature environments, with an operating temperature up to 600℃.

Corrosion resistance: The valve is made of stainless steel, possessing good corrosion resistance and being suitable for use in various corrosive media.

Compact structure: Imported stainless steel bellows-sealed needle valves have a compact structure, small volume, light weight, easy installation, and occupy little space.

High precision: The valve core adopts a needle-shaped structure, which can accurately control the flow rate and pressure of the medium, achieving high adjustment precision.

Technical Parameters of Bellows-Sealed Needle Valve

Nominal diameter: DN6-DN25

Nominal pressure: 1000~6000PSI (42MPa)

Applicable temperature: -40℃-600℃

Valve body material: Stainless steel

Valve stem material: Stainless steel

Valve core material: Stainless steel

Connection methods: Internal thread, external thread, welding, etc.

Multi-layer SS316L bellows have stronger telescopic elasticity. An additional stuffing box is equipped outside the bellows for double sealing.

The valve tip is non-rotating, and replaceable conical, spherical, and stem-tip valve cores are available to realize on-off control and regulation.

Valve materials: 304, 316L, F55, C-276, etc.

100% nitrogen testing before delivery

Application Fields of Bellows-Sealed Needle Valve

Petrochemical industry: In the petrochemical industry, bellows-sealed needle valves are used to control various chemical media under high temperature and high pressure, such as oil and natural gas.

Power industry: Used in high-temperature and high-pressure steam systems of power plants to control the flow and pressure of steam.

Chemical industry: Suitable for high-temperature and high-pressure reaction systems in the chemical industry, used to control the flow of chemical substances.

Heat exchange systems: Used in high-temperature and high-pressure heat exchange systems to control the flow direction and temperature of heat media.

Natural gas transmission: Used in natural gas pipeline systems to control the flow and pressure of natural gas.

High-temperature liquid handling: Suitable for systems that handle high-temperature liquids, such as boiler water supply systems.

Oil exploitation: Used in oilfield exploitation to control high-temperature and high-pressure oil and gas produced by oil wells.

Fertilizer production: Used for the transmission and control of high-temperature and high-pressure ammonia gas, such as in the urea production process.

In general, bellows-sealed needle valves play a crucial role in occasions requiring resistance to high-temperature and high-pressure environments as well as precise fluid control, ensuring the stable operation and safety of the system.