• Bell-O-Seal Valves

Bellow seal valves

This compact valve is designed and developed with a lifetime of up to 10,000 cycles and is recommended for steam, thermic fluid (Santotherm, Dowtherm, Hytherm, Marlotherm, Thermia and Dyphil), hydrogen and vacuum. Zero stem leakage design eliminates product losses and hazardous circumstances. All welded/bolted bonnets are of straight type in forged design. Bolted bonnet are provided for cast valves. Stellited - hard faced seating surfaces comes as optional feature. Technical specifications: Valve designed to BS 5352/BS1873/ANSI B16.34 Valve tested to API 598/BS 5146/ DIN 3230 Socket weld ends to ANSI B16.11 Butt weld ends to ANSI B16.25 Screwed ends to ANSI B1.20.1 End-to-end as per ANSI B16.10/specifications Suitable for Vacuum-atmosphere 1 x 10-6 Torr Suitable for Vacuum-across seat 1 x 10-3 Torr