Product
Water hammer relief valve
Brand：Pneumatic eccentric butterfly valve 型号：ZA46X
一、1、 Core functions and working principles
functional positioning
Water hammer protection: In the event of sudden pump shutdown or rapid valve closure in the pipeline system, instantaneous pressure relief is used to prevent pressure shock waves (water hammer effect) from damaging the pipeline.
Pressure regulation: Maintain the system pressure within a safe range (usually set at 1.25-1.5 times the working pressure).
Action mechanism
Fast opening and slow closing: When a sudden increase in pressure is detected, the valve disc will fully open and release pressure within 0.1-0.3 seconds; Delay closing for 3-5 seconds after the pressure drops to avoid secondary water hammer.
Double triggering: mechanical spring (main control)+electromagnetic induction (backup), ensuring reliability under extreme working conditions.
2、 Technical parameters and selection points
Suggestions for selecting typical ranges of key parameters
The nominal pressure of PN16-PN100 chemical pipeline is selected to be PN64 or above
Diameter (DN) DN50-DN500 Discharge capacity ≥ 10% of pipeline flow
Response time ≤ 0.5 seconds for special scenarios such as nuclear power, and ≤ 0.2 seconds
Sealing grade ANSI VI toxic medium requires zero leakage design
3、 Industry application and scenario adaptation
Municipal water supply
Install one unit every 5-8km in long-distance water pipelines to prevent pipe bursting (such as the application case of the East Route of the South to North Water Diversion Project).
industrial sector
Petrochemical industry: linked with emergency shut-off valves to protect high-temperature and high-pressure pipelines (requiring API 526 certification).
special scenario
Ship ballast system: corrosion-resistant titanium alloy valve body, certified by DNV-GL.
4、 Maintenance and troubleshooting
common problem:
Misconduct: Check the calibration of the pressure sensor (once every 6 months);
Sealing failure: Replace the PTFE+graphite wrapped gasket.
Intelligent upgrade: Install IoT modules (such as Honeywell SPS series) to monitor valve position status in real-time and predict maintenance cycles.
5、 Technological frontiers
Self learning algorithm: Train an AI model with historical data to optimize the relief pressure setting value (such as Schneider EcoStruxure system);
New material: Silicon nitride ceramic valve seat (temperature resistance up to 1200 ℃), suitable for molten salt pipelines in solar thermal power generation.
【Bace】
