Vertical Check Valve – Function, Uses & Installation | Udhhyog
Vertical Check Valve – Function, Uses & Installation Guide
The vertical check valve is a type of non-return valve (NRV) specifically designed for vertical pipelines. It ensures fluid flows in only one upward direction while preventing reverse flow, making it essential for applications where gravity flow or pressure drops can create backflow.
What Is a Vertical Check Valve?
A vertical check valve operates on gravity and pressure difference. It’s installed in a vertical pipeline where fluid enters from the bottom and flows upward. When the flow stops or reverses, gravity or reverse pressure pushes the disc or flap back into position, preventing backflow.
Working Principle
- Fluid enters from below and lifts the disc or flap.
- As long as pressure is present, the valve remains open.
- Once pressure drops or reverses, the disc falls back and seals the passage.
Vertical vs Horizontal Check Valve
| Feature | Vertical Check Valve | Horizontal Check Valve |
|---|---|---|
| Flow Direction | Bottom to Top | Left to Right (or vice versa) |
| Valve Type | Lift, Spring-loaded, Ball | Swing, Flap, Wafer |
| Installation | Vertical only | Horizontal or inclined |
| Typical Use | Boiler feed, vertical pumps | Water lines, process systems |
Where Is It Used?
- Boiler feedwater lines
- Vertical risers in pump systems
- Steam condensate return lines
- High-rise building water distribution
- Firefighting sprinkler systems
Types of Vertical Check Valves
- Vertical Lift Check Valve – Uses a vertically moving disc with pressure differential.
- Ball Type Vertical NRV – Utilizes a ball instead of a disc to close off reverse flow.
- Spring Loaded Vertical Valve – Features spring-assisted closing for fast shutoff.
Material Selection
| Component | Common Materials |
|---|---|
| Body | Cast Iron, WCB, SS 304/316 |
| Disc/Ball | SS, Bronze, Nitrile |
| Spring | SS 316, Inconel |
| Seat | Metal or soft-seated options (PTFE, EPDM) |
Vertical Check Valve Price (India)
| Size | Material | Estimated Price |
|---|---|---|
| 25mm | CI | ₹300 – ₹550 |
| 50mm | WCB / SS | ₹900 – ₹1600 |
| 100mm | SS 304 | ₹1900 – ₹3500 |
Installation Tips
- Ensure valve is installed in the correct direction (arrow marking upward)
- Valve must be in a completely vertical pipe section
- Do not use for viscous or slurry media
- Install with minimal vibration and stress
FAQs
Q1. Can I install a vertical check valve in horizontal line?
No. It is designed only for vertical upward flow applications.
Q2. Is spring-assisted better than gravity type?
Yes, spring-assisted offers faster closing and less water hammer.
Q3. Do vertical check valves need maintenance?
Minimal, but occasional flushing is helpful to prevent debris buildup.
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Conclusion
The vertical check valve is critical in systems that move water or steam vertically. With the right material and design, it prevents costly backflow and protects equipment. Udhhyog offers certified vertical NRVs suitable for all industrial needs.
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