The IMI Thompson Valves D40B AO/AC Series is a high-pressure gland packed needle valve with pneumatic actuation for remote shut-off. Designed for nuclear power, aerospace, and hazardous fluid applications, it operates at up to 620 bar (8990 psi) and 230°C (446°F). Featuring a non-rotating valve disc for positive shut-off, a graphite or PTFE gland packing ensures leak-tight sealing. It meets ASME B&PV Section III standards and supports various media, including steam, helium, and boric acid. Available in threaded, butt weld, socket weld, and stub pipe connections, ensuring secure sealing in critical environments.

Key features

620 bar rating

230°C max temp

Pneumatic actuation

Graphite/PTFE packing

Hazardous fluid handling

316L stainless steel

Threaded & welded ends