Pipe gallery valve
阀门型号：D971X，D941X,D973H，D943HValve models: D971X, D941X, D973H, D943H
Diameter specification: DN50-DN1200mm
Structural form: midline type, triple eccentric
Valve body material: cast steel WCB, stainless steel 304, 316
Nominal pressure: PN6, PN10, PN16, PN25, PN40
Applicable temperature: -40 ℃~450 ℃
Application scope: gases, water, oil products, steam, corrosive fluids
Product features: The switch is in place in a timely manner, the switch completion is good, and there is basically no error
管廊阀门Comprehensive explanation of technical specifications and application points:
1、 Valve Function and Classification
Media control category
Diverter/Confluence Valve: Used for switching the flow direction of media in multiple pipelines, it needs to meet the working conditions of nominal pressure PN10-16MPa and temperature -29~300 ℃.
Check valve: To prevent reverse flow of the medium, it is necessary to ensure that the valve disc is vertical (lift type) or the pin shaft is horizontal (swing type) during installation.
Butterfly valve: Lightweight opening and closing control, commonly used carbon steel/stainless steel materials for municipal pipelines, requiring electric or hydraulic drive.
Safety monitoring category
Integrate temperature, humidity, and combustible gas sensors, upload real-time data to the pipe gallery monitoring platform, and trigger the linkage of the exhaust/lighting system.
2、 Specification for Layout of Pipe Gallery Valves
Space optimization principle
Large caliber valves are arranged near the columns of the pipe gallery, and thermal compensation pipelines are prioritized at the ends of the crossbeam for the installation of "Type II" expansion bends.
Cold medium and flammable pipelines are located below hot pipelines, while non-metallic pipelines are placed at the bottom layer.
Operation and maintenance requirements
The installation height of the valve should be ≤ 1.2 meters from the operating surface, and the handwheel should face the operable area to avoid working from above.
Valves that require frequent operation (height>8 meters) must be equipped with a fixed platform.
3、 Key installation techniques
Project requirements
The direction of the arrow on the flow verification valve body must be consistent with the flow direction of the medium (the shut-off valve should be "low in, high out").
The connection method for flange valves requires parallel and concentric double end faces, and threaded valves must be equipped with a flexible joint and close to the valve body.
The seismic design of the upper structure reduces the number of bolts and improves the reliability of high-pressure large-diameter working conditions.
Anti corrosion treatment: It is prohibited to invert the outdoor valve stem to avoid medium retention and corrosion; The buried open stem gate valve needs moisture-proof protection.
4、 Integration of intelligent monitoring system
Real time collection of valve status through the pipeline safety monitoring platform, covering temperature and humidity, gas leakage, and water accumulation data, supporting remote opening and closing and fault warning.
The cable tray rack needs to be reserved on the top floor of the pipe gallery and wired in layers with the valve control system.
Attachment: Typical Fault Avoidance Measures
Thread seal failure: Close the upstream medium before disassembly, and set the union downstream of the valve.
Thermal stress deformation: Compensation units are installed every 50 meters for long-distance pipelines to avoid bag shaped cecum structures.
Note: The pressure test needs to be conducted at 1.5 times the nominal pressure for strength testing, and the sealing performance should be verified at 25 times the working pressure.
