Update time: 24.11.2009
Hot Blast Valves
Hot Blast Valves
Design features
- Fabricated construction
- Minimizing of heat loss of process temperature due to optimized thermal insulation of body, bonnet (uncooled) and paddle
- Thermal insulation comprising various materials
- Optimization of thermal insulation, allowing for water cooling of only the body seats and paddle
- Special design cooling water passages provide optimum flow
- Sealing in both directions, floating paddle design
- Valve actuation in accordance with customer’s requirement (man./electr./hydr./pneum.)
- Pressure rating up to PN 6
- Service temperatures up to 1650 °C (3000 °F)
- Nominal diameters up to 3000 mm (120 inch)
- Other sizes or operating conditions on request
- German and foreign patents pending
This design guarantees
- Considerable reduction of required quantity of cooling water (also during emergency operation)
- Extended operational life of the valve due to increased thermal insulation, reducing thermal stresses to the valve
- No deposits in cooling water channels
- Due to optimized design valve is easily maintained
- Reduced operating costs due to:
- decreased heat loss of process temperature
- reduction in amount of cooling water required
Operating conditions
- Temperatures up to 1650 °C (3000 °F)
- Thermal shock
- Temperature fluctuations
- Short closing and opening time.
Service applications
- Hot blast valves on blast furnace stove installation
- Blast furnace isolation valves
- Back draught valves
- Isolation of media, with entrained solids, at elevated temperature