Series J29W Pressure Gauge Needle Valve
J29W压力表针型阀
J29W压力表针型阀是一种专为压力表根部安装设计的小口径仪表阀门,采用外螺纹连接结构,通过旋转手轮驱动阀杆升降,带动针形阀瓣实现精确的开启与关闭。其密封面由阀体材料直接加工(“W”型),形成金属对金属的硬密封。该阀门主要用于压力表的根部切断、仪表隔离、管路取样及排污排空,可直接安装于压力表与工艺管道之间,便于压力表的在线拆装、校验和维护,在石油、化工、电力、制药等行业中作为关键的仪表保护设备,确保测量系统的安全可靠运行。
特点
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.
性能规范表
| 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-320 | 32.0 | 48.0 | 35.2 | 0.6 | 32.0 | P≤540℃ | 液化石油气、水、酸、蒸汽、油品等 Liquefied petroleum gas,water,acid,steam,oil products,etc. |
| J29H/W-320P | 32.0 | 48.0 | 35.2 | 0.6 | 32.0 | C≤425℃ |
结构图
零部件名称材料表
| 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 |
外形安装尺寸表
| 型号mdoel | 公称直径DNmmNominal diameter | 尺寸size | 重量kgweight | |||||||
| L1 | D1 | D2 | L2 | H | H1 | M1 | M2 | |||
| J29H/W-320 | 3 | 60 | 65 | 50 | 65 | 85 | 93 | M14×1.5 | M20×1.5 | 1.0 |
| J29H/W-320P | 6 | 60 | 65 | 50 | 65 | 85 | 93 | M14×1.5 | M20×1.5 | 1.0 |
