The IMI Thompson Valves E71B AO/AC Series is a pneumatic bellows-sealed high-pressure needle valve designed for nuclear power, aerospace, and hazardous fluid applications. Operating at up to 414 bar (6003 psi) and 350°C (662°F), it ensures positive shut-off with a non-rotating valve disc. The bellows construction provides reliable pressure containment, while the secondary gland packing acts as a back-up seal. Available in air-to-open or air-to-close configurations, it enables remote operation. Compliant with ASME B&PV Section III standards, it suits instrumentation and process applications in nuclear, marine, and defence sectors.

Key features

414 bar rating

350°C max temp

Pneumatic actuation

Bellows-sealed design

Secondary gland packing

316L stainless steel

Threaded & welded ends