8 inch butterfly valve
An 8 inch butterfly valve usually refers to a valve with a nominal diameter of 8 inches, and its size is DN200, or 200mm. This size is determined based on the international valve size standards, ensuring the uniformity and interchangeability of valve specifications.
In industrial pipeline systems, valves are essential and important components, which are used to regulate the flow rate, cut off the flow of the medium, or change the flow direction.
As a medium-sized valve, the 8 inch butterfly valve is widely applied in various industrial pipeline systems. Whether in heavy industrial fields such as petrochemicals, power, and metallurgy, or in civil fields such as water supply and drainage, and heating, ventilation, and air conditioning, 8 inch butterfly valves play a significant role. They are not only used to regulate and control the flow of the medium but also undertake the important task of ensuring the safe operation of the pipeline system.
Main features of 8 inch butterfly valves.
- 8 butterfly valve can choose the metal to metal seat ring or resilient seat ring;
- The yoke is designed according to ISO 5211 standard and connected with an electric actuator, pneumatic actuator, hydraulic actuator, or operated manually;
- It has a replaceable sealing ring design;
- It is metal to the metal structure, and has a fire safety design and structure. The metal seated structure makes the valve fire-safe and meets the requirement in API 607.
- Minimal loss of pressure.
- Easy to open and close.
- Good leak tightness.
- Compact design.
Technical Specifications
| Design Standard | API 609, ASME B16.34, JIS B2064, GB/T 12238 |
| Face to Face | API 609, DIN 3202, ISO 5752, BS 5155 |
| Flange End | DIN 2501, ASME B16.5, BS 4504, JIS 10K |
| Top Flange | ISO 5211 |
| Test Inspection | API 598, EN 12266-1 |
Main Parts Materials
| No | Part | Material |
| 1 | Body | Cast Iron / Ductile Iron / Carbon Steel / Stainless Steel |
| 2 | Disc | Cast Iron / Ductile Iron / Carbon Steel / Stainless Steel |
| 3 | Stem | Stainless Steel |
| 4 | Seat | EPDM / NBR / PTFE / VITON / HYPALON / SS304 / SS304 +Graphite |
| 5 | Stem Packing | EPDM / NBR / Graphite |
Dimensions&Weight
| Pressure Rating | Bore | Face to Face Dimension(in mm) | Weight | ||
| (in mm) | RF | Wafer | Lug | kg | |
| CLASS 150 | 201 | 292/152 | 60/64 | 60/64 | 20 |
| CLASS 300 | 201 | 418/230 | 73 | 73 | 35 |
| CLASS 600 | 201 | 660/230 | 102 | 102 | 60 |
The data is for reference only, please consult sales@wayvalve.com for details.
8 butterly valves are widely used in the following fields:
- Heating air-conditioning systems
- Water purification system
- Mining industry
- Shipbuilding
- Chemical industry
- Food industry
- Oil and gas industry
- Fire extinguishing system
How to know the size of a butterfly valve?
To know the size of a butterfly valve, first check the valve’s nameplate or label. It usually indicates the nominal diameter, such as DN200 for 8 inches. You can also measure the inner diameter of the valve’s opening with a measuring tape or caliper. Additionally, referring to the product manual or technical specifications provided by the manufacturer is a reliable way to obtain accurate size information.
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