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LXLX 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.

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.

newLogoThe New LX-300 Zero-Side-Clearance Steam Boiler Packs All the Horsepower You Need in 1/4 the Space

LX300SG 16 LS s

Small footprint design offers high-efficiency, On-Demand Steam Saving money, space, and start-up time.

  • Modular design allows flexibility to customize your steam plant to meet any demand
    and load profile optimized for superior energy management

  • Zero-side-clearance design reduces boiler room size and cuts construction costs
  • Achieves 87% efficiency using Miura’s built-in energy recovery & water treatment systems
  • Steam production from cold start in 5 minutes
  • Saves up to 20% on fuel costs & CO2 emissions on average.
  • New design innovations optimize combustion for consistent low NOx emissions.
  • Ultra Low NOx Model Now Available (9 ppm)

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 87% fuel-to-steam efficiency.

LX Series Comparison Table

ITEM LX(L)-50 SG
LX(L)-100 SG
LX-150 SG
LX(L)-200 SG
LX-300 SG[7]
Utilization Horsepower[1] (BHP) 50 100 150 200 300
Maximum Pressure (PSIG (MPa)) 170 PSIG MAWP, 150 PSIG Maximum Operating (15 PSIG MAWP)
Equivalent Output[2] (LB/HR) 1,725 3,450 5,175 6,900 10,350
Heat Output (BTU/HR) 1,674,000  3,348,000 5,022,000  6,695,000  10,050,000 
Efficiency (Fuel to steam)[3] 85% 87%
Operational Weight (LBS) 3,710 6,070 8,620 8,620 12,600
Shipping Weight (LBS) 3,480 5,470 7,820 7,820 11,500
Dimensions Given are Approximate
Width (in.) 37" (50") 38" (67") 55" 55" (75") 63"
Length (in.) 94" (119") 123" (155") 140"

140"

158"
Height (in.) 97" (147") 97" (161") 117" 117" (131") 123"
Combustion System Proprietary Forced Draft, Step Fired Hi-Low-Off
Ignition System Electric Spark Ignited, Interrupted Gas Pilot
Power Supply 208, 230, 460, 575V, 3 phase, 60Hz
Max. Electrical Consumption (KVA) 6.5 (5.0) 13.3 (10.9) 22.1 24.3 refer to insatallation manual 1.8
Fuel Type[4]
Natural Gas or Propane Gas (3-5 PSIG)
Natural Gas Consumption[5] (SCFH) 1,970 3,940 5,910 7,880 11,540
Gas Suppy Pressure 3-5 PSIG (Natural Gas or Propane Gas)
Main Steam Outlet (in.) 2" (4") 2" (6") 3" (8") 3" (8") 4"
Safety Valve Outlet[6] (in.) One 1 1⁄4" (2 1⁄2") One 2" (Two 2 1⁄2") One 2 1⁄2" (Two 4") Two 2 1⁄2"
Main Water Inlet (in.) ¾" 1" 1 1/2"
Fuel Gas Inlet (in.) 1 1⁄2" 2" 2 1⁄2"
Automatic Surface Blowdown One 3⁄8" Note 9
Bottom Blow-off & L.V.C Blow-off Two 1" Note 9
Chimney Diameter (OD) 12" 20"
Flame Detector Self-Checking Ultraviolet Flame Eye Sensor
Pressure Control Adjustable Pressure Transducer and Switches
Liquid Volume Control Electric Conductivity Type
Overheat Protection Low Water Cut Off & Thermocouple
new50


"S"   - Economizer
"G"   - Natural Gas or Propane Fired
"(L)" - Low Pressure


Dimensions

 The drawing illustrated is LX-200 SGI-07

LX front view

(inches)

  A1 A2 A3 B1 B2 B3 H1 H2 h*
LX(L)-50 SG 37 19 22 93 57 78 96 62 79
LX(L)-100 SG 37 17 17 122 86  17 17 122 86 
LX-150 SG 55 17 17 140 72 121 117 83 84
LX(L)-200 SG 55 17 17 140 72 121 117 83 84
** LX 300 SG 63 51 14 158 26 127 123 96 107
LX top s
LX side s
NO.
NAME OF PART NO. NAME OF PART
1 BOILER VESSEL 8 BOTTOM BLOW OFF VALVE
2 STEAM SEPARATOR 9 STEAM OUTLET VALVE (OPTION)
3 LIQUID VOLUME CONTROLLER 10 MAIN SAFETY VALVE
4 WIND BOX  11 AUTOMATIC SURFACE BLOWDOWN
5 BLOWER 12 MAIN GAS TRAIN
6 CONTROL BOX  13 FEEDWATER PIPING 
7 L.V.C. BLOW-OFF VALVE 14 ECONOMIZER

NOTE :

1. Dimensions, Specifications and some pipings are subject to change without notice.
2. Minimum Height with separator & blower assy dismantled.
3. Minimum clearance in front of control box and inverter box are dictated by installation codes.

LX schematic View
NO. NAME OF PART NO. NAME OF PART
1 MAIN GAS VALVE 18 PRESSURE GAUGE
2 MAIN GAS REGULATOR 19 L.V.C BLOW-OFF VALVE
3 GAS CONTROL VALVE 20 VALVE
4 MAIN GAS ORIFICE (LOW) 21 PRESSURE GAUGE VALVE
5 TEST FIRING VALVE 22 CHECK VALVE
6 PILOT GAS VALVE 23 AIR CONTROL VALVE
7 PILOT GAS REGULATOR 24 AIR VENT VALVE
8 PILOT GAS CONTROL VALVE 25 SAFETY VALVE
9 PILOT GAS ORIFICE 26 SAMPLE WATER VALVE
10 PILOT AIR ORIFICE 27 SURFACE BLOWDOWN VALVE
11 MAIN GAS ORIFICE (HIGH) 28 BLOWDOWN STRAINER
12 HIGH-LOW CONTROL VALVE 29 BLOWDOWN VALVE
13 BOTTOM BLOW-OFF VALVE 30 GAS PRESSURE SWITCH
14 PRESSURE SWITCH 31 GAS PRESSURE SWITCH
15 PRESSURE SWITCH 32 AIR PRESSURE SWITCH
16 STEAM PRESSURE SWITCH 33 BLOWDOWN ORIFICE
17 STEAM PRESSURE SWITCH    

NOTE :

1. Unless otherwise specified, All items are standard.
2. Design, Specifications and some pipings are subject to change without notice.

 

NOTES:

[1] Available 49 and 180 BHP rating for L.A. area.
[2] Equivalent output calculated base on conversion of 212°F (100°C) feedwater to 212°F (100°C) steam.
[3] Thermal Efficiencies are based on high heating values of fuels and 68°F(20°C) feedwater.
[4] c-UL-us approved for Natural gas and propane gas.
[5] Gas consumption based on Natural Gas with high heating value 1,000 Btu/SCF and calculated with economizer.
[6] Safety valve outlet size may change depending on the pressure setting.
[7] See Miura's MI system brochure for more on how the new LX-300 zero-side-clearance layout offers the highest system capacity per square foot in the industry.
[8] High pressure model (300 PSI), LXH200, LXH300 is available.
[9] Tees into Bottom Blow-off piping (1 ¼").

ADDITIONAL NOTES:

1 All Miura Steam boilers are fully packaged and test fired at factory.
2 Built to meet or exceed UL & ASME standards, CSA & B-51 standards.
3 Low pressure steam is available in 50, 100, and 200 BHP only.
4 California Low NOx models (LX 100SGI, LX 200SGI, and LX 300 SGI) available.
5 Both Operational and Shipping weights may vary for LX(L) - models.

i. The low pressure steam is available in 50, 100 and 200HP only.

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