Screwed Bonnet Needle Valves-Angle Type Male Type

Screwed Bonnet Needle Valves-Angle Type Male Type

SIYelectric Screwed Bonnet Needle Valves are designed for precise flow regulation of liquids and gases in industrial process lines, instrumentation systems, laboratory equipment, and calibration applications.

The valve uses a long tapered needle stem that fits into a precision-machined seat. This structure allows operators to adjust the flow gradually and accurately, making it suitable for applications where fine flow control is more important than simple on/off operation.

The screwed bonnet structure provides stable valve assembly and dependable operation in instrumentation and process control systems. These needle valves are commonly used for sampling lines, purge systems, pressure testing, calibration loops, gas distribution, liquid distribution, and high-pressure fluid handling.

Applications

Flow Regulation

Precise liquid and gas adjustment
Used in gas or liquid pipelines where flow needs to be controlled accurately and gradually.

Low-flow control
Suitable for instrument lines, sampling points, purge lines, and auxiliary process lines where small flow changes must be adjusted carefully.

Testing and Calibration

Instrumentation calibration support
Commonly used in laboratories, pressure test systems, calibration benches, and process control applications to regulate test liquids or gases.

Controlled filling and venting
Can be used with pressure gauges, pressure transmitters, manifolds, and test equipment to support pressure adjustment, filling, venting, or controlled pressure release.

Gas and Liquid Distribution

Industrial fluid distribution
Applied in gas and liquid distribution systems for oil & gas, chemical processing, pharmaceutical, food and beverage, and general industrial applications.

Local flow adjustment
Used where operators need reliable fine control in branch lines, sampling systems, or instrument connection lines.

Pressure Control

Sensitive fluid handling
Screwed bonnet needle valves are often used in fuel systems, hydraulic systems, pneumatic systems, high-pressure lines, and critical fluid control applications where pressure and flow require careful adjustment.

Hazardous or demanding media
For corrosive, toxic, flammable, high-pressure, or high-temperature fluids, the valve material, sealing structure, pressure rating, and connection type should be selected according to actual operating conditions.

Advantages

• Screwed bonnet design supports stable assembly and reliable valve operation.
• Tapered needle stem allows gradual and precise flow control.
• Suitable for liquids, gases, test fluids, and process media.
• Ideal for instrumentation, sampling, purge, testing, calibration, and pressure control applications.
• Compact valve structure helps reduce potential leakage points.
• Applicable to high-pressure and demanding process conditions, depending on material and sealing selection.
• Multiple material and connection options can be selected according to process medium, pressure, temperature, and installation requirements.