Butterfly Valve Buyer’s Guide – Symbol, HSN Code, Sizes
Butterfly Valve Buyer’s Guide – Symbol, HSN Code, Sizes & Comparison
If you're planning to buy a butterfly valve and confused about its size, symbol, HSN code, or how it compares to other valves — you’re in the right place. This Buyer’s Guide breaks down all the essential info, whether you're sourcing for water, HVAC, or chemical use.
Let’s decode the specs, sizes, types, and pricing basics for butterfly valves in India — without the jargon.
What Is a Butterfly Valve?
A butterfly valve is a quarter-turn rotational motion valve used to stop, regulate, or start flow. The "butterfly" is a disk that rotates to allow or restrict flow. It is widely used in pipelines due to its compact design and quick operation.
Where It's Used:
- Water treatment plants
- HVAC systems
- Fire protection lines
- Chemical and food processing industries
Butterfly Valve Symbol & HSN Code
Butterfly Valve Symbol (P&ID):
In engineering diagrams (P&ID), a butterfly valve is typically represented by a line intersected by a solid triangle or a circle with a T-handle. Symbols may vary slightly depending on ANSI, ISO, or ISA standards.
| Symbol Type | Use |
|---|---|
| ⬤⊣ or ─|◯|─ | General P&ID symbol |
| ⬤ | Actuated butterfly valve |
| ◯ | Manual butterfly valve |
Note: Always refer to your project’s P&ID legend for symbol confirmation.
Butterfly Valve HSN Code (India):
- HSN Code: 8481.80
- Description: Taps, cocks, valves and similar appliances for pipes, boiler shells, tanks
Common Butterfly Valve Sizes (3 Inch vs 6 Inch)
Which Size Should You Choose?
The valve size depends on:
- Flow rate
- Pipe diameter
- Pressure requirements
| Feature | 3 Inch Valve | 6 Inch Valve |
|---|---|---|
| Pipe Compatibility | DN80 / 3” | DN150 / 6” |
| Flow Rate | Lower | Higher |
| Weight | Lighter (5–10 kg) | Heavier (15–25 kg) |
| Use Case | HVAC, fire lines | Large pipelines, water works |
| Price Range (approx) | ₹900 – ₹2,000 | ₹2,000 – ₹4,000 |
Tip: Always match valve size with your pipe ID and pressure class (e.g. PN16, ASA 150).
Butterfly Valve vs Ball Valve – Which One’s Better?
A common question buyers have:
Should I go for a butterfly valve or a ball valve?
| Feature | Butterfly Valve | Ball Valve |
|---|---|---|
| Design | Disc rotates in flow path | Ball rotates inside housing |
| Space Saving | ✅ Compact | ❌ Bulkier |
| Cost | ✅ More economical | ❌ Higher cost |
| Flow Control | ✅ Good throttling | ❌ Not ideal for throttling |
| Maintenance | ✅ Simple parts | ❌ Complicated seats |
| Size Suitability | Best for large diameters | Best for smaller sizes |
Best Use Cases:
- Butterfly valve: Large pipelines, frequent operation
- Ball valve: High-pressure applications, smaller systems
Buyer Checklist Before Ordering
- Required size (inches/DN)
- Material – Cast Iron, SS, PVC, etc.
- Pressure rating – PN10/PN16/ASA 150
- End connection – Wafer / Lug / Flanged
- Handle or actuator type
- Brand/quality certificate (ISO, BIS)
Price Range for Butterfly Valves in India
| Size (Inch) | Price Range (₹) | Material |
|---|---|---|
| 2 inch | 700 – 1,500 | CI / SS |
| 3 inch | 900 – 2,000 | CI / SS |
| 4 inch | 1,200 – 2,500 | CI / SS |
| 6 inch | 2,000 – 4,000 | CI / SS |
| 8 inch | 3,500 – 6,500 | Cast Iron / SS |
Prices vary by brand and pressure rating. Always request a quote with detailed specs.
FAQ – Butterfly Valve Buyer Questions
Q1. What is the use of a butterfly valve?
Ans: It regulates or stops flow in pipelines using a rotating disc. It’s ideal for large diameters and quick operation.
Q2. What is the HSN code for butterfly valve?
Ans: The standard HSN code in India is 8481.80.
Q3. Which is better – butterfly valve or ball valve?
Ans: For large pipelines and throttling use, butterfly valve is better. For high pressure and tight shut-off, go for ball valve.
Q4. How do I choose the right butterfly valve size?
Ans: Match it to your pipe inner diameter (DN size), pressure requirement, and flow rate.
Q5. What is the symbol of butterfly valve in P&ID?
Ans: A circle or triangle inside two lines, varies with standard. Confirm with your project legend.
Related Topics
- Types of Butterfly Valves – Working, Parts & Diagram Explained
- Lug vs Flanged Butterfly Valve – Full Comparison Explained
? Conclusion
A butterfly valve may seem like a small part of your system, but choosing the right size, symbol, and specifications ensures performance and safety. Use this guide as your go-to reference before making your next purchase.
Need help choosing the right valve?
? Contact Udhhyog Experts for Technical Advice & Price Quote
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