Y4-68 Series / Boiler Induced Draft
Y4-68 Boiler Centrifugal Induced Draft Fan
Centrifugal induced draft fan for boiler flue-gas extraction, furnace exhaust and industrial hot-gas ventilation systems. Selection is based on airflow, pressure, gas temperature, dust condition, motor power, rotation and outlet arrangement.
No. 8–16 14,978–155,627 m³/h 422–4,728 Pa
AIRFLOW
14,978–155,627 m³/h
TOTAL PRESSURE
422–4,728 Pa
MOTOR POWER
5.5–250 kW
GAS TEMPERATURE
≤250°C
Y4-68 Series
Technical Index
01 Overview 02 Construction 03 Performance 04 Flue Gas 05 Arrangement 06 Applications 07 Selection 08 Resources 09 FAQ
Quick Facts
No. 8–16
D-Type Drive
Flue Gas Duty
Gas ≤250°C
Dust Control Required
D-Type Drive
Flue Gas Duty
Gas ≤250°C
Dust Control Required
01 / Engineering Overview
Flue-Gas Extraction for Boiler Induced Draft Systems
Y4-68 is a centrifugal induced draft fan designed for boiler flue-gas extraction and industrial exhaust duties. It operates on the downstream side of the combustion process, drawing flue gas through the boiler, ductwork and gas-cleaning equipment.
Compared with the G4-68 forced draft fan, Y4-68 must be selected with additional attention to gas temperature, dust loading and system resistance. Published reference service allows flue-gas temperatures up to 250°C.
Y4-68 = Induced Draft
Use Y4-68 for boiler flue-gas extraction. For clean-air combustion supply, use the G4-68 forced draft series.
02 / Construction
D-Type Boiler Induced Draft Fan Construction
01
Impeller
Backward-inclined airfoil blade construction for stable centrifugal performance.
02
Volute Casing
Welded steel casing for flue-gas collection and pressure conversion.
03
Inlet
Streamlined converging inlet for controlled entry into the impeller.
04
Inlet Damper
Adjustable inlet device can be used for airflow control.
05
D-Type Drive
Fan shaft and motor connected by elastic coupling.
03 / Performance Data
Y4-68 Reference Performance
Reference values for preliminary model comparison. Final fan selection should be checked against actual flue-gas temperature, dust loading and system resistance.
SIZE
RPM
AIRFLOW m³/h
PRESSURE Pa
MOTOR
POWER
No.8D
1450
15,889–29,038
1,540–1,059
Y160L-4
15 kW
No.9D
1450
22,623–41,345
1,952–1,344
Y180L / Y200L
22–30 kW
960
14,978–27,374
853–589
Y160M-6
7.5 kW
No.10D
1450
31,033–56,715
2,413–1,658
Y225M-4
45 kW
960
20,546–37,549
1,059–726
Y180L-6
15 kW
730
15,623–28,553
608–422
Y160M2-8
5.5 kW
No.11.2D
1450
43,599–79,681
3,021–2,080
Y250S-4
75 kW
960
28,866–52,754
1,324–912
Y200L2-6
22 kW
730
21,950–40,115
765–530
Y180L-8
11 kW
No.12.5D
1450
60,611–110,772
3,767–2,590
Y315S / Y315M
110–132 kW
960
40,129–73,339
1,648–1,138
Y250M-6
37 kW
730
30,515–55,768
952–657
Y225S-8
18.5 kW
No.14D
1450
85,154–155,627
4,728–3,247
Y355M2-4
250 kW
960
56,378–103,036
2,070–1,422
Y315S-6
75 kW
730
42,871–78,350
1,197–824
Y250M-8
30 kW
No.16D
960
84,156–153,803
2,708–1,854
Y315L1/L2-6
110–132 kW
730
63,994–116,954
1,560–1,079
Y315S-8
55 kW
580
50,844–92,922
991–677
Y315S-10
45 kW
Published Y4-68 performance data covers No.8–16 configurations. Final model selection should account for actual flue-gas density, temperature, dust concentration and system resistance.
04 / Flue Gas Conditions
Temperature and Dust Directly Affect Fan Selection
Gas Temperature
Published reference maximum is 250°C.
Dust Loading
Dust concentration should be reduced before flue gas enters the fan.
Dust Collector
Published series guidance recommends a dust-removal device with efficiency of at least 85%.
Gas Composition
Confirm corrosive components, moisture and other process contaminants.
05 / Rotation & Arrangement
Confirm Rotation and Outlet Position Before Ordering
Rotation
Left-hand or right-hand rotation, viewed from the motor side.
Outlet Angles
0° / 45° / 90° / 135° / 180° / 225°
Drive
D-type arrangement with elastic coupling.
06 / Application Fit
Typical Y4-68 Induced Draft Applications
Boiler Flue Gas
Extraction of combustion products through the boiler and flue-gas system.
Application → Furnace Exhaust
Induced exhaust for industrial furnace and combustion systems.
Dust Collection Exhaust
Exhaust downstream of suitable gas-cleaning equipment where duty conditions match.
Process Exhaust
Industrial hot-gas extraction within the Y4-68 operating range.
07 / Before Selection
Information Required for Y4-68 Selection
01
Airflow
Required flue-gas volume in m³/h.
02
Pressure
Required system pressure / resistance.
03
Gas Temperature
Normal and maximum flue-gas temperature.
04
Dust Condition
Dust concentration and upstream dust-removal equipment.
05
Rotation & Outlet
Required rotation and discharge direction.
06
Electrical
Voltage, frequency, phase and motor requirements.
System resistance unknown?
Send boiler capacity, duct layout, dust collector information, chimney data and available operating parameters. Read the engineering guide →
08 / Technical References
Related Engineering Guides
TEMPERATURE
Gas Temperature vs Industrial Fan Performance → AIRFLOW & PRESSURE
Industrial Fan Airflow and Pressure Explained → ROTATION & OUTLET
Fan Rotation and Outlet Angle Guide → Product Path
Forced Draft or Induced Draft?
G4-68 Boiler Centrifugal Forced Draft Fan
For boiler combustion-air and clean-air supply.
Boiler Induced Draft System
Understand induced-draft fan duty in the complete boiler flue-gas system.
Boiler & High-Temperature Fans
Browse other boiler and elevated-temperature fan configurations.
09 / FAQ
Y4-68 Induced Draft Fan Questions
What is Y4-68 used for?
Y4-68 is designed primarily for boiler induced-draft and flue-gas extraction duties.
What is the difference between G4-68 and Y4-68?
G4-68 supplies clean combustion air as a forced draft fan. Y4-68 extracts boiler flue gas as an induced draft fan.
What flue-gas temperature can Y4-68 handle?
Published series guidance specifies a maximum flue-gas temperature of 250°C.
Does Y4-68 require a dust collector?
Published guidance recommends upstream dust-removal equipment with efficiency of at least 85% to reduce fan wear and improve service life.
What is the Y4-68 airflow range?
Published reference data covers approximately 14,978 to 155,627 m³/h, depending on fan size, speed and motor configuration.
Can motor voltage and frequency be customized?
Motor selection can be reviewed according to voltage, frequency, phase and destination-market project requirements.
Y4-68 Selection Request
Send the Flue-Gas Duty. We Review the Fan.
Airflow · Pressure · Gas Temperature · Dust Condition · Rotation · Outlet Angle · Voltage · Frequency
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