hot water boiler 1.Structure:WATER tube 2.Pressure: LOW Pressure 3.Style: Horizontal 4.Type: ... .84.20.353Working PressureMPa0.70.70.70.70.74out water tempreture°C95959595955return water tempreture°C70707070706Thermal Efficiency%77.2377.2377.6678.8271.797Fuel ... fan ,air blower,feed water pump, valve instrument, crusher, chimney, electric cabinet, multi-cyclone and so on. HOT WATER BOILER--DZL4.5-0.7 ...