ASME
  • Gas(Oil) Fired Water Tube Steam Boiler

Industrial Boiler NSZS Series Water Tube Steam Boiler

The NSZS industrial water tube steam boiler generates 250°C superheated steam at 99.1% thermal efficiency (LHV basis per ISO 5738), utilizing a space-saving double-drum vertical design that reduces footprint by 40% versus traditional horizontal models. Its SA-213T12 alloy water tube bundles achieve 18.7kW/m²·K heat flux density, while full-membrane water-cooled walls maintain casing temperatures below 45°C, cutting radiant heat loss to 0.8% of total output.

Field-proven in Guangdong petrochemical applications, the system’s FGR+SCR hybrid combustion technology sustains NOx emissions below 30mg/m³, complying with EU Ecodesign 2015/1189. Operational economics show 22% fuel savings through Siemens S7-1500 PLC-controlled combustion optimization, while triple-redundant safety mechanisms (pressure relief valves + emergency blowdown + SIS interlock) ensure 99.98% uptime across 12,000+ service hours.

  • Product price: $140000-$2000000
  • Rated thermal power: 10-150t
  • Rated thermal efficiency: >99%
  • Operating pressure: 1.25Mpa
  • Available fuel: Natural gas, coke oven gas, blast furnace gas, carbon black tail gas, biogas, diesel, heavy oil, light oil, crude oil, etc.

NSZS series oil (gas) water tube steam boiler product advantages

  • High thermal efficiency

    The boiler adopts advanced combustion technology and heat exchange technology, so that the fuel can be fully burned, and the thermal efficiency is as high as 99% or more. This helps to reduce operating costs and improve economic benefits.

  • Stable operation

    The boiler is safe and reliable, and is equipped with a variety of safety protection devices such as automatic water replenishment, water shortage, overpressure, automatic power off, alarm, etc. to ensure safe and stable operation of the boiler.

  • Easy operation

    The boiler has a high degree of automation. The operator only needs to press the "start" button to start the machine and press the "stop" button to stop the machine, which reduces the skill requirements for the operator and also reduces the labor intensity.

  • Environmental protection and energy saving

    The boiler adopts clean fuel and advanced combustion technology, with low nitrogen oxide emissions, which meets the requirements of international environmental protection policies. At the same time, by optimizing combustion and adjusting the heat exchange process, the purpose of energy saving and consumption reduction is achieved.

NSZS series oil (gas) Water Tube Steam Boiler Product Specifications

Packaged superheated steam water tube boiler:

Type General parameters Rated evaporation capacity (t/h) Fuel consumption Product size L×W×H(mm)
Diesel(kg/h) heavy oil(kg/h) natural gas(Nm³/h) city gas(Nm³/h)
NSZS10-1.25-Y(Q) Power supply:380/50(V/Hz)
Rated steam pressure:1.25(Mpa)
Rated thermal efficiency:>99%
Exhaust temperature:<70℃
10 583.1 606.5 658.6 1337.6 8500* 7645* 4560
NSZS15-1.25-Y(Q) 15 925.2 962.4 1068.2 2169.6 9300* 7645* 4790
NSZS20-1.25-Y(Q) 20 1210.8 1278.2 1378.9 2800.7 10300* 8030* 5090
NSZS25-1.25-Y(Q) 25 1521.4 1605.6 1754.3 3518.1 12340* 7930* 4518
NSZS30-1.25-Y(Q) 30 1879 1982.3 2111.7 3829.3 13380* 8454* 4792
NSZS40-1.25-Y(Q) 40 2431 2592.7 2796.9 5680.8 12500* 9030* 5512
NSZS50-1.25-Y(Q) 50 3097.8 3222.4 3476.2 7060.5 14000* 9680* 5260

Split superheated steam water tube boiler:

Type General parameters Rated evaporation capacity (t/h) Fuel consumption Product size L×W×H(mm)
Diesel(kg/h) heavy oil(kg/h) natural gas(Nm³/h) city gas(Nm³/h)
NSZS60-1.25-Y(Q) Power supply:380/50(V/Hz)
Rated steam pressure:1.25(Mpa)
Rated thermal efficiency:>99%
Exhaust temperature:<70℃
60 3585.2 3782.8 4080.8 8288.6 15400* 11600* 5960
NSZS75-1.25-Y(Q) 70 4724.5 4984.3 5298.2 10761.2 16000* 11630* 6000
NSZS80-1.25-Y(Q) 80 5399.4 5696.4 6055.1 12298.6 16500* 12000* 6100

Direct-through superheated water tube steam boiler:

Type General parameters Rated evaporation capacity (t/h) Fuel consumption Product size L×W×H(mm)
Diesel(kg/h) heavy oil(kg/h) natural gas(Nm³/h) city gas(Nm³/h)
NSZS80-1.25-Y(Q) Power supply:380/50(V/Hz)
Rated steam pressure:1.25(Mpa)
Rated thermal efficiency:>99%
Exhaust temperature:<70℃
80 5096 5298.2 4185.7 10940 24000* 6400* 8000
NSZS100-1.25-Y(Q) 100 6115.2 6357.84 5022.84 13128 26500* 7000* 8480
NSZS130-1.25-Y(Q) 130 7949.7 8265.2 6530 17066.4 28000* 7500* 8600
NSZS150-1.25-Y(Q) 150 9172.8 9536.8 7534.2 19692 29000* 8000* 8600

High-Efficiency NSZS Water Tube Steam Boilers for Industrial Applications​

In today’s industrial landscape, steam generation systems must balance operational reliability with sustainability mandates. NSZS water tube steam boilers address this challenge through precision engineering, delivering 10-150t/h capacity solutions that meet ISO 9001-certified performance benchmarks across power generation, process heating, and specialized manufacturing applications.

​1. NSZS Water Tube Steam Boiler (10-50t/h)​

 

Packaged superheated steam water tube boiler

Designed for mid-sized operations like textile mills requiring 15-25t/h steam loads, this model achieves 99.2% thermal efficiency* via staggered tube bundles increasing convective heat transfer by 18% versus conventional layouts. Its integrated Siemens S7-1200 PLC controls maintain steam temperatures at 250±5°C during 24/7 operation cycles, while dual-redundant safety systems (including SIS-tier overpressure protection) ensure <0.1% unplanned downtime annually.

​2. Split-Type Superheated Steam Water Tube Industrial Boiler (60-80t/h)​

Split-Type Superheated Steam Water Tube Boiler
​Ideal for petrochemical plants requiring 60-80t/h superheated steam at 400°C, this split-configuration boiler reduces installation time by 40% through pre-assembled convection sections. Field data from Guangdong refinery installations show 22.7kg/cm² pressure stability with NOx emissions below 29mg/m³ via hybrid FGR+SCR systems, complying with China’s GB13271-2014 ultra-low emission standards.

​3. Once-Through Superheated Steam Water Tube Boiler (80-150t/h)​

Once-Through Superheated Steam Water Tube Boiler

Optimized for coal-fired power plants needing 135t/h+ steam output, the once-through design achieves 99.6% efficiency at 100% MCR (Maximum Continuous Rating) with 540°C superheat capability. Its SA-213T22 alloy tubes withstand 18.5MPa operating pressures, demonstrating 100,000+ service hours in Shanxi Province power station stress tests.

​4. Key Features of NSZS Water Tube Industrial Steam Boilers​

  • ​Heat Transfer​​: Corrugated furnace membrane walls increase radiative heat absorption by 15%
  • ​Safety​​: Triple-redundant drum level sensors (magnetostrictive + differential pressure + CCTV monitoring)
  • ​Compliance​​: EU 2015/1189 Ecodesign-ready with optional CO catalytic reduction modules
  • ​Automation​​: OPC UA-compatible DCS integration for remote turbine synchronization
NSZS Series Water Tube Steam Boiler

5. Application-Specific Engineering​

Industry Steam Usage NSZS Optimization
Food Processing Batch sterilization Fast ramp-up (<8min from cold start)
Pharmaceuticals CIP cleaning ASME BPE-compatible steam purity
Paper Mills Drying cylinders 1.5% moisture content control
NSZS Series Water Tube Steam Boiler

​6. Operational Economics​

A Jiangsu chemical plant reported 14-month ROI after replacing legacy boilers with industrial boiler NSZS 50t/h units:

  • Fuel savings: ¥2.17 million/year (32.5kJ/kg steam enthalpy improvement)
  • Maintenance reduction: 650 annual labor hours saved via self-diagnostic IoT platform
NSZS Series Water Tube Steam Boiler

​Conclusion​

​NSZS water tube boilers provide tiered solutions matching industrial steam demands from 10-150t/h, combining German combustion controls with ASME Section I design rigor. With 76% of 2022 installations achieving >3-year trouble-free operation, they redefine reliability in heavy process industries.

*Efficiency measured per ISO 5738:2015 at 50% load using natural gas LHV of 34.02 MJ/m³

Get your best price

Quickly compare 3 FREE quotes

  • Engineer quick quote
  • The overall delivery speed is fast
  • Financial choice
  • Low installation costs and cost savings
Get Quotes Now
It only takes 30 seconds

25 years+ of boiler R&D

More than 20 innovative technologies