6 inch Butterfly Valve

In valve standards, 6 inches corresponds to a nominal diameter of DN150. Therefore, the nominal diameter of a 6 inch butterfly valve is DN150 (that is, 150 millimeters).
According to the actual product parameters, the outer diameter of a DN150 butterfly valve is approximately 210 millimeters, and the thickness is about 55 millimeters (the specific values may vary depending on the model and connection method, such as the flanged type, wafer type, etc.).
The main features of 6 inch butterfly valve,
- Unique wave line seat and disc shape reduce the required torque and extend the service life of the valve.
- The disc seat is vulcanized to a phenolic backup ring guaranteeing positive control of seating torque while eliminating seat distortion.
- Precision machined 316SS disc with two-piece stem (shaft) construction, enhances the flow capacity of the valve and reduces turbulence.
- Stem utilizes PTFE/graphite bearings with V-type ring seals to prevent leakage.
- The bracket connected with the drive device conforms to ISO5211 standard;
- The stem is designed to meet API 609 requirements with a blowout-resistant design.
Dimensions&Weight
Pressure Rating | Face to Face Dimension(in mm) | Weight | |||
RF Long Pattern | RF Short Pattern | Wafer Type | Lug Type | kg | |
CLASS 150 | 267 | 140 | 57 | 57 | 65 |
CLASS 300 | 403 | 210 | 59 | 59 | 90 |
CLASS 600 | 559 | 210 | 78 | 78 | 170 |
Material Standard
No | Part | Material |
1 | Body | ASTM A351 CF8M |
2 | Seal Ring | Graphite + SS316 |
3 | Retainer Flange | ASTM A182 F316 |
4 | Pin | ASTM A276 316 |
5 | Disc | ASTM A351 CF8M |
6 | Stem | ASTM A276 316 |
7 | Stem Packing | Graphite |
8 | Stem Beating | SS316 + PTFE |
9 | Bolt | ASTM A193 B8 |
10 | Nut | ASTM A194 8 |
11 | Yoke | ASTM A216 WCB |
The data is for reference only, please consult sales@wayvalve.com for details.
Application scopes of 6 butterfly valve
- Petrochemical Industry
In refineries, chemical plants, and natural gas processing plants, six – inch valve bodies are among the important pipeline valves, used to control and regulate the flow and pressure of oil and gas media. - Power Industry
In power generation facilities such as thermal power plants and nuclear power plants, six – inch valve bodies are used to control the flow of circulating water and steam, ensuring the normal operation of the equipment. - Pharmaceutical Industry
In pharmaceutical factories, hospitals and other places, six – inch valve bodies can be used for the control and regulation of equipment such as pipelines and storage tanks. - Food Industry
In food processing plants, beverage factories and other places, six – inch valve bodies are used to ensure the safety and hygiene of food and beverages.

What size bolts for 6 inch butterfly valve?
The bolt size for a 6-inch butterfly valve is typically 5/8” diameter with a length of 2” to 3”, depending on the flange thickness. Always confirm with the manufacturer’s specifications for precise requirements.
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