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ភាសាខ្មែរIf you are looking for a DN80 (D90) check valve for your piping system, this information will be useful to you.
The phi 90 size (equivalent to DN80) is widely used in water supply and drainage systems, fire protection systems (FIRE), and many other industrial applications. This type of valve prevents backflow, protects pumps and pipelines, and helps maintain stable system pressure.
On the market, DN80 (D90) check valves come in various designs and materials, such as swing, spring-loaded, or wafer types, made from cast iron, brass, or stainless steel. In this article, you’ll find detailed information on their features, specifications, applications, reference prices, and installation & maintenance guides—helping you choose the most suitable and cost-effective product.
Outstanding Features of the DN80 Check Valve
Like other check valves, the DN80 (D90) type offers several key advantages:
- Effective backflow prevention
- Variety of types and materials: Depending on your needs, you can choose swing, spring, or wafer check valves made of ductile iron, brass, or stainless steel—meeting both technical and budget requirements.
- Tight sealing and durability: The valve disc or flap is often covered with EPDM/NBR rubber, providing corrosion resistance and reliable sealing under pressure and temperature variations.
- Easy installation and maintenance: The optimised design allows for quick installation and convenient disassembly for cleaning or replacement.
- Stable operation: Designed for working pressure PN10–PN16 and temperature range from –10°C to 80°C, suitable for a wide range of applications.
With these features, the DN80 (D90) check valve not only ensures efficient performance but also reduces operation and maintenance costs over its service life.
Standard Technical Specifications
To choose the right product, understanding the technical parameters is essential. The phi 90 size corresponds to DN80, and depending on the valve type (swing, spring, or wafer), the specifications may differ:
| Specification | Swing Check Valve | Spring Check Valve | Wafer Check Valve |
|---|---|---|---|
| Nominal Size | DN80 (phi 90) | DN80 (phi 90) | DN80 (phi 90) |
| Length (mm) | 241 | 180 | 64 |
| Outer Diameter D (mm) | 200 | 200 | 137 |
| Bolt Circle K (mm) | 160 | 160 | 94 |
| Bolt Quantity & Ø | 8 × Ø19 | 8 × Ø19 | 4 or 8 × Ø (depending on standard) |
| Working Pressure | PN10/PN16 | PN10/PN16 | PN10/PN16 |
| Working Temperature | –10 ~ 80°C | –10 ~ 80°C | –10 ~ 80°C |
| Body Material | Ductile Iron / Brass | Ductile Iron / Brass | Ductile Iron |
| Disc Material | Stainless Steel / Brass + EPDM | Ductile Iron + EPDM | Stainless Steel 304/316 |
| Gasket Material | NBR/EPDM | NBR/EPDM | NBR/EPDM |
Applications of DN80 (D90) Check Valves
Thanks to their versatile design and stable operation, DN80 check valves are widely used across many fields. Choosing the right valve type for each environment ensures durability and efficiency:
- Water supply & drainage systems: Installed near pumps or main pipelines to prevent backflow and maintain system pressure.
- Fire protection systems: Keep firefighting water lines pressurised and ready for use.
- Water treatment plants & pumping stations: Prevent contaminated water from flowing back into clean water sources.
- Food & beverage industries: Stainless steel or brass versions are used to ensure hygiene and prevent cross-contamination.
- HVAC and heavy industries: Used in steam, compressed air, or process liquid pipelines to maintain consistent pressure and flow.
Latest DN80 (D90) Check Valve Price List (2025 – Reference)
Prices depend on the valve type, material, brand, and origin. Below is a reference price range:
| Valve Type | Material | Brand / Origin | Reference Price (VND) |
|---|---|---|---|
| Swing Check Valve DN80 | Ductile Iron, EPDM disc | Shin Yi / RoBo | 1,350,000 – 1,850,000 |
| Spring Check Valve DN80 | Ductile Iron / Brass | Shin Yi / RoBo / Minh Hòa | 1,400,000 – 2,200,000 |
| Wafer Check Valve DN80 | Ductile Iron + SS304 disc | Shin Yi | 1,200,000 – 1,800,000 |
| Brass Threaded Check Valve DN80 | Brass | Minh Hòa | Contact for price |
Notes:
- Prices exclude VAT and shipping.
- Actual prices vary by quantity, discounts, and purchase time.
Installation & Maintenance Guide
Installation Steps
- Check flow direction: Follow the arrow on the valve body to prevent incorrect installation.
- Prepare connection surfaces: Clean flanges or threads to ensure proper sealing.
- Position the gasket correctly: Avoid misalignment or folding that can cause leaks.
- Tighten bolts evenly: Use a cross-pattern tightening sequence to prevent deformation.
- Choose the right mounting position: Valves can be installed horizontally or vertically, depending on the type.
Maintenance Tips
- Regular inspection: Every 3–6 months to detect leaks or improper closing.
- Clean internal components: Remove debris and sediment to maintain sealing performance.
- Replace worn parts: Gaskets, springs, or discs should be replaced promptly when worn.
- Shut off the system before servicing to ensure safety.
For genuine DN80 (D90) check valves at competitive prices with full technical support, contact Bao Tin Steel:
📞 Hotline: 0932 059 176
📧 Email: bts@thepbaotin.com