LX Gas/Low NOx Series
Low and High Pressure Steam Boiler

Miura’s Ultra Low NOx Steam Generator uses the most advanced technology. The flat shaped burner and the rectangular shaped boiler vessel are uniquely designed for the reliable low NOx.

  • 5 minutes from cold start to full pressure.
  • Ultra Low NOx gas burner with “Quenched flame”.
  • Up to 300HP per boiler and up to 4,500HP (150,000lb/hr) with our MI-system.
  • 170 PSIG and 15 PSIG MAWP available.
  • Up to 300psi pressure boiler is available.

MIURA’s exclusive “low water content, water tube” 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 maintains an 85% fuel-to-steam efficiency.

Specifications
LX(L)-200 SG
Utilization Horsepower[1] 200HP
Maximum Pressure 170 psig MAWP
Equivalent Output[2] 6,900 LB/HR
Heat Output 6,695,000 BTU/HR
Efficiency (fuel to steam)[3] 85% (80% without Economizer)
Heating Surface Area 387.7 FT²
Operational Weight 8,620 LBS
Shipping Weight 7,820 LBS
Dimensions Given are Approximate
Width 42.5 in. (70.5 in.)
Length 141.5 in.
Height 116.5 in. (190 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, 575V, 3 phase, 60Hz
Max. Electrical Consumption 24.3 KVA (19.0 KVA)
Fuel Type[4] Natural Gas or Propane (3-5 PSIG)
Gas Consumption[5] 7,850 SCFH
Gas Supply Pressure

3-5 PSIG Natural Gas or Propane

Main Steam Outlet Valve 3 in. (8 in.)
Safety Valve Outlet One 2 1⁄2 in.
Main Water Inlet 1 in.
Fuel Gas Inlet 2 in.
Automatic Surface Blowdown One 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
The drawing illustrated is LX-200 SG
Front View
LX-200 SG
A1 A2 A3 B1 B2 B3 H1 H2 h*
42 ½ 16 ½ 17 141 ½ 72 121 116 ½ 82 ½ 84 ½

(Inches)
* Minimum height for Boiler Knock Down

Side View

No. Name of Part
1 BOILER VESSEL
2 STEAM SEPARATOR
3 LIQUID VOLUME CONTROLLER
4 WIND BOX
5 BLOWER
6 CONTROL BOX
7 MANUAL BLOWDOWN VALVE
8 MANUAL BLOWDOWN VALVE
9 STEAM OUTLET VALVE (OPTION)
10 MAIN SAFETY VALVE
11 AUTOMATIC BLOWDOWN
12 MAIN GAS TRAIN
13 FEEDWATER PIPING
14 ECONOMIZER

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
11 MAIN GAS ORIFICE (HIGH)
12 HIGH-LOW CONTROL VALVE
13 BOILER BLOW-OFF VALVE
14 PRESSURE SWITCH
15 PRESSURE SENSOR
16 STEAM PRESSURE SWITCH
17 STEAM PRESSURE SWITCH
18 PRESSURE GAUGE
19 L.V.C. BLOW-OFF VALVE
20 VALVE
21 CHECK VALVE
22 CHECK VALVE
23 AIR CONTROL VALVE
24 AIR VENT VALVE
25 SAFETY VALVE
26 SAMPLE WATER VALVE
27 BLOWDOWN CONTROL VALVE
28 BLOWDOWN STRAINER
29 BLOWDOWN VALVE
30 GAS PRESSURE SWITCH
31 GAS PRESSURE SWITCH
32 AIR PRESSURE SWITCH
33 GAS VENT VALVE*
Note
  1. Available 49 and 199 BHP rating for L.A. area.
  2. Equivalent output calculated from and at 212°F (100°C) feed water at 212°F (100°C) steam.
  3. Thermal efficiencies are based on high heating values of fuels at 68°F (20°C) feed water.
  4. UL and c-UL approved for natural gas or propane.
  5. 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. Low pressure steam is available in 50, 100 and 200HP only. California Low NOx option available