Keystone Butterfly Valve Figures 129 & 139
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ABS Certificate to valveOverview
Figure 129 and Figure 139 are heavy-duty, resilient-seated butterfly valves that are ideally suited for many industrial high-performance applications, such as air, water, and vacuum service. In addition, Figures 129 and 139 can also be used for marine and naval use where MIL-V-22133C specified valves are required.
Specifications
| Sizes | 2-20 inch |
| Pressure ratings | 200 psi |
| Temperature range | -40 °F to 250 °F |
| Standards | API 609, ASME B16.34 |
| Body | Cast iron, Ductile iron, Nickel aluminum bronze |
| Disc | Ductile iron, Aluminum bronze, 316 Stainless Steel, Monel® |
| Seat | NBR, EPDM |
Features
- Replaceable, metal-reinforced seat, completely encapsulated by rubber, isolates the stem and body from the media and eliminates seat deformation due to high vacuum or turbulence.
- Self-adjusting, bi-directional stem seal is ideal for full industrial vacuum and pressure, preventing external contamination of the stem area.
- Heavy-duty, corrosion-resistant top bushing absorbs all actuator side thrust loads.
- Primary stem seal, formed by preloaded contact of disc hub with flatted seat surfaces, completely isolates stem and body from the line media.
- Secondary stem seal, crafted by an engineered interference fit of the stem through the seat, providing additional sealing integrity.
- Self-locking, stainless steel disc screws allow for quick deconstruction, while also providing a solid connection.
- ABS Type Approved
