The body flange and bonnet flange are joined by studs and nuts, with a gasket of suitable design/material inserted between the flange faces to facilitate sealing. This in turn creates a seal between the gasket and the inner(I.D.) of the valve body. A segmented trust ring maintains the load.
| Driving manner | Hand-operated, Gear-operated, Electric driving |
| Design standard | API600, API6D |
| Face to face | ASME B16.10 |
| Model | Z40H, Z40Y, Z540H, Z540Y, Z940H, Z940Y |
| Class | 150, 300, 600, 900, 1500, 2500 |
| NPS | 2-48 |
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