Design, Manufacturing and Testing – Technology at a Glance

Allsen Triple Offset Butterfly Valve is engineered to deliver zero-leakage performance from vacuum to high-pressure applications. Its advanced design ensures that the disc seal contacts the body seat only at the final shut-off position – minimizing friction, reducing torque, and enhancing sealing reliability.

• Zero-Rubbing Design: Disc seal engages the seat only at shut-off, ensuring minimal wear and
• extended service life.
• High-Temperature & Severe Service Ready: Solid metal or metal with graphite seat rings provide
• superior tightness under demanding conditions.
• Rigid Construction: Single-piece cast body and asymmetric matching parts guarantee tightness in
• both flow directions.
• Precision Seat Geometry: Inclined conical seat ensures non-rubbing, non-jamming, bi-directional
• zero-leakage shut-off.
• Optimized Disc–Stem Connection: Reduces friction, eliminates external connections, and simplifies
• maintenance.
• Reliable Performance Under Stress: Robust disc-stem assembly resists pressure and temperature
• variations.
• Ease of Maintenance: Fully adjustable, field-replaceable stem packing extends operational life.