ZWNS Series Horizontal vacuum Oil/Gas Fired Hot Water Boiler
1. Negative pressure running ,no worried boiler explode,too much safety.
2.Boiler high temperature  parts  designed sepeartely with high pressure parts,enhance boiler life too much, boiler life can reach about 30years.
3.Automatically control system,can control boiler with remote control system by net.
4. S.S heat exchanger ,no pollution for boiler.

Boiler FAQs

Q: What different types of boilers are available?

DZL type steam/hot water boiler
SZL type steam /hot water boiler
SHL type steam /hot water boiler
WNS type steam /hot water boiler
SZS type steam /hot water boiler
SZW type steam /hot water boiler
CFB type steam boiler
YLW type thermal oil boiler/heater
YYL(W) type thermal oil boiler/heater
WNS type thermal oil boiler/heater
SZS type thermal oil boiler/heater
SZW type thermal oil boiler/heater
Waste heat recovery boiler
Steam generator

Q: What is a fire tube steam boiler?

A fire tube steam boiler is a boiler where the combustion gases from the burner are channeled through tubes that are surrounded by the fluid to be heated. The boiler body is the pressure vessel and contains the fluid. In most cases, this fluid is water that will circulate for heating purposes or become steam for use in processing.
Each set of tubes through which the combustion gas passes, before making a turn, is considered a “step”. Consequently, a three-step boiler will have three sets of pipes with the outlet located at the rear of the boiler.

Q: What’s advantages of our boiler?

Wide Range of Fuel Type
Applicable for a various of light oil, furnace oil, natural gas, LNG, biogas, coke gas, methanol, biodiesel, etc.

High Thermal Efficiency
New and unique design with high thermal efficiency, which save running cost of buyer

Unique Control System
Unique three-elements control system with PID unit covered PLC, inverters, and HMI to reach high level automatic running of boiler

Q: What is the turndown ratio of our boilers?

our boilers feature turndown ratios of 5:1, means the boiler’s minimum operating load is 20% of the boiler’s full capacity (100% capacity)

Q: How do I choose the right boiler?

Firstly, check the actual steam pressure and consumption required at present, and discuss with management there are extra steam required or not in next five years.
Secondly, confirm the boiler fuel type, then we will provide you an optimal boiler that take all factors in consideration.

Q: How long does an industrial steam boiler last?

The normal service life of a steam boiler is 10 to 20 years, provided that proper care and maintenance routines are applied to the feedwater and interior of the boiler.
When considering steam boiler replacement, the three most important aspects to consider are safety, economy and changing requirements to perform the function for which it is operating.

Q: What services for industrial boilers does our offer?

we offers its customers the following services for industrial steam boiler, thermal oil boiler and waste heat recovery boilers and steam generators:

Customized boiler designs.
Super quality boiler product
Installation and commissioning service
Operators training service
Lifetime maintenance service.

Q: What safety features do steam boiler have?

Boiler shutdown protection due to water level low
Boiler shutdown protection due to continuous water level low
Boiler shutdown protection due to steam pressure high
Safety valve over pressure protection.
Automatic FWP on / off

Q: What is the lead time of our boiler

The subject boiler will be delivered within 60 -90 days based on boiler capacity

Q: What primary components for boilers are there?

The most common accessories are:
Burner
Economizer and condenser
Feed water pump
Thermal deaerator (if necessary)
Chimney
Control panel
Instrument gauges and valves
we supplies all types of complementary equipment for industrial steam boilers, and designs new equipment and tools if they are necessary for the final installation to meet its clients’ expectations.

Q: What are the optional items of boiler for buyer choose from

Steam and feed water flow meter
Periodic blowdown expander (if necessary)
Continuous blowdown expander (if necessary)
Thermal deaerator (if necessary)

Q: What is the supply scope of boiler arranged by buyer

Whole civil works engineering by our design drawing
All connecting piping (steam, feed water piping)
All connecting cables (motor cables, single cables, main power supply cable)
Some connecting valves from feed water pump point
Chimney manufacture on site by our design drawing
Balance flue gas ducting manufacture on site by our design drawing
Thermal deaerator

Q: How does boiler warranty work?

The subject boiler is covered by a twelve months warranty against mechanical and/ or factory defects from date of test-run or 18 months from the date of shipment whichever comes earlier.
we shall repair or replace the components, parts or accessories covered by warranty that had become inoperative within the warranty period but not covered caused by faulty operation from the buyer.
we will provide lifetime service for boiler with cost when its warranty expired.

Q: Who will be fitting my new boiler?

Simply, a local professional boiler installing company will install the subject boiler under our engineer’s instruction and supervision

Q: How long will my installation & commissioning take?

Typically, the whole installation & commissioning work may take 1-4 months based on the subject boiler capacity.

Q: How often should I maintain my boiler?

Overhaul inspection and maintenance: 1-3 month
we will provide detail brochure regarding how and when to do maintenance work during boiler running.