300x Slow Closing Flanged Check Valve
300X Slow Closing Flanged Check Valves are hydraulic control valves designed to prevent backflow, eliminate water hammer, and protect pumping systems by combining check valve, control valve, and water hammer suppression functions in a single unit.
Overview
The 300X Slow Closing Flanged Check Valve is installed at the outlet of pumps in water supply systems. It prevents reverse flow, reduces water hammer, and minimizes pressure surges during pump start-up and shutdown, ensuring safe and reliable system operation.
Working Principle
The valve operates automatically according to pump operation. During pump start-up, the valve opens rapidly to allow flow. When the pump stops, the valve closes in a controlled two-stage process—fast closing followed by slow closing—to effectively eliminate water hammer and pressure shock.
Design Characteristics
- Pilot-operated hydraulic control structure
- Combination of check valve, control valve, and water hammer eliminator
- Automatic operation synchronized with pump start and stop
- Flanged end connections for secure installation
Key Features
- Prevents backflow in pump discharge lines
- Eliminates water hammer and pressure shock
- Large flow capacity with minimal pressure loss
- Reliable sealing performance
- No external power required
- Easy installation, adjustment, and maintenance
- Long service life
Functions
- Acts as an automatic check valve
- Provides slow closing to suppress water hammer
- Protects pumps and pipelines during start-up and shutdown
Applications
- Water supply pump stations
- Municipal water distribution systems
- Firefighting water systems
- Industrial water supply networks
Advantages
- Improves safety and reliability of pumping systems
- Reduces maintenance costs caused by water hammer damage
- Stable performance under varying operating conditions
- Integrated design reduces the need for additional equipment