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  • J29W Pressure Gauge Needle Valve

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J29W Pressure Gauge Needle Valve

J29W Pressure Gauge Needle Valve

  • Model:J29W-16P/J29W-25P/J29W-40P/J29W-64P/J29W-100P/J29W-160P/J29W-320P
  • Specification:DN3~DN6
  • Temperature:-40ºC~+540ºC
  • Medium:water, steam, oil products
  • Pressure:PN16-PN32
  • Connection method:Internal thread
  • Driving method:Manual
  • Material:cast steel, stainless steel
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J29W Pressure Gauge Needle ValveOverview

The J29W 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 J29W Pressure Gauge Needle Valve

J29W Pressure Gauge Needle ValveCharacteristic

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

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.

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.

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.

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

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

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

Compact structure for space adaptability: Small size and light weight make it ideal for space-limited installations.

J29W Pressure Gauge Needle Valvestructure principle

Structure Diagram of J29W Pressure Gauge Needle Valve

Component name and material

零件名称 Part name阀体 Body阀杆 Stem阀底座 Valve Base填料 Packing填料阀盖 Gland Bonnet手轮 Handwheel
J29H/W-320-DN3碳钢 Carbon steel铬不锈钢 Chrome stainless steel碳钢 Carbon steel聚四氟乙烯 PTFE碳钢 Carbon steel优质碳钢 High-quality carbon steel
J29H/W-320P-DN6铬镍不锈钢 Chrome-nickel stainless steel铬不锈钢 Chrome stainless steel铬镍不锈钢 Chrome-nickel stainless steel柔性石墨 Flexible graphite不锈钢 Stainless steel不锈钢 Stainless steel


J29W Pressure Gauge Needle Valvetechnology parameter

Performance Specification Sheet

型号 Model公称压力 Mpa Nominal Pressure (Mpa)试验压力) PS (Mpa) Test Pressure PS (Mpa)工作压力 Mpa Working Pressure (Mpa)工作温度 ℃ Working Temperature (℃)适用介质 Applicable Medium
壳体 Casing密封 (液) Seal (liquid)密封 (气) Seal (gas)
J29H/W-32032.048.035.20.632.0P≤540℃液化石油气、水、酸、蒸汽、油品等 Liquefied petroleum gas,water,acid,steam,oil products,etc.
J29H/W-320P32.048.035.20.632.0C≤425℃


J29W Pressure Gauge Needle Valvestandard size

J29W Pressure Gauge Needle Valve Outline Drawing

Outline dimension table

型号mdoel公称直径DNmmNominal diameter尺寸size重量kgweight
L1D1D2L2HH1M1M2
J29H/W-3203606550658593M14×1.5M20×1.51.0
J29H/W-320P6606550658593M14×1.5M20×1.51.0