EX Gas/Oil Series - High Pressure Steam Boiler
Miura’s exclusive “low water content, watertube” design is the most versatile boiler available in the marketplace today. A once-through, forced circulation steam boiler producing steam in just 5 minutes while maintaining an 85% fuel-to-steam efficiency.
Gas-Oil dual fuel burner
Up to 300BHP per boiler and up to 4,500 HP (150,000lb/hr) with our MI-system
Up to 250psi pressure boiler is available.
Specifications Dimensions and Schematic
Note
Specifications
EX-250 SGO
Boiler Type
No 2 Oil Fired, Natural Gas or Propane Fired with Economizer
Utilization Horsepower
250 HP
Maximum Pressure
170 psig MAWP
Equivalent Output
8,625 LB/HR
Heat Output
8,369,000 BTU/HR
Efficiency
85% (80% without Economizer) - fuel to steam
Heating Surface Area
407 FT²
Operational Weight
17,850 LBS
Shipping Weight
16,600 LBS
Dimensions Given are Approximate
Width
94 in.
Length
135.5 in.
Height
157 in.
Combustion System
Proprietary forced draft, step fired modulation Hi-Low-Off
Ignition System
Electric spark ignited, interrupted gas pilot
Power Supply
208, 230, 460, 575 V, 3 Phase, 60 Hz
Max. Electrical Consumption
32.3 KVA (34.3 for oil)
Fuel Type
Natural gas or propane (3-5 psig), No. 2 oil
Gas Consumption
9,810 SCFH
No.2 Oil
68.7 GAL/Hr
Gas Supply Pressure
3-5 psig natural gas or propane
Main Steam Outlet Valve
4 in.
Safety Valve Outlet
Two 2 1/2 in.
Main Water Inlet
1 1/4in.
Fuel Gas Inlet
2 1/2in.
Fuel Oil Inlet
3/4 in.
Automatic Surface Blowdown
Two 3/8 in.
Manual Blowdown
Two 1 in.
Chimney Diameter (ID)
20 in.
Flame Detector
Ultraviolet flame eye sensor
Pressure Control
Adjustable pressure transducer and switch
Liquid Volume Control
Electric Conductivity Type
Overheat Protection
Low Water Cut Off Thermocouple
Dimensions
Front View
EX-250 SGO
A1
A2
A3
A4
B1
B2
B3
B4
94
50
32
6 ½
135 ½
52 ½
32
68
H1*
H2
H2**
h
145 ½
74
145 ½
119 ½
Side View Top View
No.
Name of Part
1
BOILER VESSEL
2
STEAM SEPARATOR
3
LIQUID VOLUME CONTROLLER
4
ECONOMIZER
5
BLOWER
6
CONTROL BOX
7
WIND BOX
8
OIL PUMP
9
LADDER
10
STEAM OUTLET FLANGE
11
MAIN SAFETY VALVE(S)
12
MANUAL BLOW DOWN
13
MANUAL BLOW DOWN
14
TOP INSPECTION HOLE
15
SIDE INSPECTION HOLE
16
AUTOMATIC BLOWDOWN
17
AIR DUCT
18
ECONOMIZER SAFETY VALVE
19
FEEDWATER PIPING
20
MAIN GAS TRAIN
Schematic View (Standard)
No.
Name of Part
1
MAIN GAS VALVE
2
MAIN GAS REGULATOR
3
GAS CONTROL VALVE
4
MAIN GAS ORIFICE (LOW)
5
TEST FIRING VALVE
6
PILOT GAS VALVE
7
PILOT GAS REGULATOR
8
PILOT GAS CONTROL VALVE
9
PILOT GAS ORIFICE
10
PILOT AIR ORIFICE (HIGH)
11
HIGH-LOW CONTROL VALVE
12
SAFETY VALVE(S)
13
SAFETY RELIEF VALVE*
14
AIR VENT VALVE
15
STEAM PRESSURE SWITCH
16
STEAM PRESSURE SWITCH
17
PRESSURE GAUGE
18
PRESSURE SENSOR
19
BOILER BLOW-OFF VALVE
20
BLOWDOWN CONTROL VALVE
21
SAMPLE WATER VALVE
22
BLOWDOWN STRAINER
23
SAMPLE WATER VALVE
24
GAS PRESSURE SWITCH
25
GAS PRESSURE SWITCH
26
AIR PRESSURE SWITCH
27
WATER VALVE*
28
CHECK VALVE*
29
CHECK VALVE*
30
CHECK VALVE*
31
FEED WATER VALVE
32
OIL PUMP
33
OIL FILTER
34
OIL CONTROL VALVE
35
OIL CONTROL VALVE
36
OIL CONTROL VALVE
37
OIL PRESSURE GAUGE
38
OIL VENT VALVE
39
GAS VENT VALVE*
40
AIR CONTROL VALVE
41
L.V.C. BLOW-OFF VALVE
42
PILOT AIR ORIFICE
43
OIL PRESSURE SWITCH*
* MAY NOT BE SUPPLIED OR OPTIONAL ACCORDING TO BOILER TYPE
Note
Optional EXH-SGO Series at 250 Psig MAWP, 225 Psig maximum operating
Equivalent output calculated from and at 212°F (100°C) feed water at 212°F (100°C) steam.
Thermal efficiencies are based on high heating values of fuels at 68°F (20°C) feed water.
UL and c-UL approved for natural gas, propane, and No. 2 oil.
Gas consumption based on natural gas with high heating 1004 BTU/SCF.
All Miura steam boilers are fully packaged and test fired at factory.
Built to meet or exceed UL and ASME standards in U.S.A.; c-UL and B-51 standards in Canada.
Flue gas recirculation is optional only with the economizer.
