| Customization: | Available |
|---|---|
| Media: | Gas, Water, Steam |
| Driving Mode: | Manual, Electric, Hydralic, Pneumatic |
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A resilient seated butterfly valve is characterized by a stem that is bored into the disk and attached to the bottom of the valve. Most of the time, the seats of this kind of valve is made of rubber, hence, the term resilient.
As such, the disc relies on the high contact capability of the seat and the seat for tight shut-off. With this kind of design, the seat-to-seal contact begins at about 85-degree turn.
Resilient seated butterfly valves are made of a one-piece. This increases the strength of the valve as well as reduce its weight. The rubber-back seat makes it easy to install even when the butterfly valve is outdoors. Because of the nature of the material, it has a reliable sealing capacity.
This classification is based on how the valve is connected to the pipes.
This is the most economical and lightweight. This design aims to prevent bi-directional differential pressures and backflows. There are two pipe flanges that sandwich the valve. They seal and connect the valve to the pipe system through bolts. For stronger sealing, there are O-rings and gaskets placed on both sides of the valve.
The lug type butterfly valve has lugs placed outside and around the valve body. These are often used in dead-end services or in applications that only require low pressure. The lugs are threaded. Bolts, which match that of the pipes, connect the valve to the pipe.
The butt-welded butterfly valve has the connections welded directly to the pipe. This type of valve is primarily used for high-pressure applications.
This type is characterized by having a flange face on both sides. This is where the valves connect. This design is typical among large-sized valves.
| No | Part | Material |
| 1 | Body | ASTM A351 CF8 |
| 2 | Seal Ring | Graphite + SS304 |
| 3 | Retainer Flange | ASTM A182 F304 |
| 4 | Pin | ASTM A276 304 |
| 5 | Disc | ASTM A351 CF8 |
| 6 | Stem | ASTM A276 304 |
| 7 | Stem Packing | Graphite |
| 8 | Stem Beating | SS304 + PTFE |
| 9 | Bolt | ASTM A193 B8 |
| 10 | Nut | ASTM A194 8 |
| 11 | Yoke | ASTM A216 WCB |
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