The Series 555/401 Softseal Valve is a double-faced, resilient seat, internal screw, clear bore wedge gate valve. It is designed primarily for the isolation of natural gas and manufactured gas. These valves are tested and approved as resistant to high temperatures and can be installed inside occupied buildings, remaining leak-tight in the event of fire.
The Donkin 555 softseal gas valves are manufactured with the tried and trusted Donkin metallic wedge used for over 50 years on the gas networks. A true wedge design, the gate seals on both machined faces with an embedded nitrile seal in each face which sit completely outside the flow of gas with the valve open.
| AVK ref. no. | DN (mm) | BR (DN) | H3 (mm) | HH (mm) | L (mm) | W (mm) | Turns to open | Theoretical weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 555-050-34-011503 | 50 | Rp 1/2 | 325 | 275 | 178 | 165 | 9 | 13 |
| 555-080-34-011503 | 80 | Rp 1/2 | 408 | 334 | 203 | 200 | 12.5 | 21 |
| 555-100-34-011503 | 100 | Rp 1/2 | 445 | 356 | 229 | 220 | 15.5 | 26 |
| 555-150-34-011503 | 150 | Rp 3/4 | 561 | 452 | 267 | 285 | 14.5 | 46 |
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