“Exhaust gas economizer:
Maker: Aalborg Industries
Type: AV-4 Boiler
Steam dump valve actuator:
AV-4 Boiler instruction manual, Steam dump equipment, PNEUMATIC ACTUATOR, TYPE DP, Page 49-17 / 39, Figure 1, Table 1 (required spare）
Boilers instruction manual, Steam Water System – MISSION OL, Data sheet 6050000325 (Pneumatic control valve, DN 40, PN 40, with DP
actuator and I/P positioner).
Technical data, actuator:
Control signal: 0.8 – 2.4 bar
Max. permissible closing pressure: 32 bar
Diaphragm area: 400 cm²
Max. air supply pressure: 6 bar
Action: Spring closes on air failure” ROLLING DIAPHRAGM AALBORG INDUSTRIES.NA.1