Added to quote
Your quote has no products.
Quick product entry
IMI Thompson Valves
E71B AO/AC Type 271AO - Bellows Sealed Needle Valve
Pneumatic bellows-sealed needle valve for nuclear and aerospace applications.
Pneumatic actuation allows for remote valve operation.
Bellows-sealed design prevents leaks and ensures containment.
Handles extreme pressures and hazardous fluids safely.
Features
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
Specifications
Fluid Types
Water
Steam
Heavy Water
Gas
Hydrogen
Boric Acid
Corrosive Fluids (Acids & Caustics)
Liquid
Port Size (")
0.25 to 0.5
Maximum Working Pressure (barg)
414
Material
SS 316L
SA182-F316L
Z2CND17.12
Design Codes
ASME Sec. III
Temperature Limits (°C)
0 to 350
