The J19W external thread pressure gauge needle valve is a small-bore instrument valve specifically designed for pressure gauge root installation, featuring male thread connections. It is operated by rotating the handwheel to drive the stem and needle-type disc for precise opening and closing. Its sealing surface is directly machined from the valve body material (“W” type), forming a metal-to-metal hard seal. This valve is primarily used for pressure gauge root isolation, instrument isolation, pipeline sampling, and draining/venting. It can be installed directly between the pressure gauge and the process pipeline, facilitating online removal, calibration, and maintenance of pressure gauges. It serves as a critical instrument protection device in industries such as petroleum, chemical, power generation, and pharmaceuticals, ensuring safe and reliable operation of measurement systems.

Product Drawing of J19W Male Threaded Pressure Gauge Needle Valve

1.Designed specifically for pressure gauges: Compact structure allows direct installation at the pressure gauge root, facilitating online removal, calibration, and maintenance.

2.Male thread connections for easy installation: Both ends feature standard male threads (such as M20×1.5, G1/2, NPT1/2) matching pressure gauge and pipeline ports, ensuring simple installation and reliable sealing.

3.Needle-type disc for precise regulation: The needle disc cooperates with the seat to enable precise adjustment and control of small flow rates with excellent regulation performance.

4.Metal-to-metal hard seal for reliability: Sealing surfaces are directly machined from stainless steel, forming a wear-resistant metal-to-metal hard seal with long service life.

5.All-stainless steel corrosion resistance: Body and main components are made of 304/316 stainless steel, providing excellent corrosion resistance for various corrosive media.

6.High-pressure design: Robust body structure withstands high working pressures, suitable for high-pressure applications.

7.Reliable stem sealing: Multi-layer packing or PTFE sealing with gland prevents external leakage.

Structure Diagram of J19W Male Threaded Pressure Gauge Needle Valve

Component name and material

Performance Specification Sheet

J19W Male Threaded Pressure Gauge Needle Valve Outline Drawing

Outline dimension table