APPLICATION Damper.pdfAPPLICATION CONSTRUCTION Fire Damper is generally used for control in air distribution system. In event of fire, Fire Damper will shut automatically, discontinuing

APPLICATION

CONSTRUCTION

Fire Damper is generally used for control in air distribution system. In event of fire, Fire Damper will shut automatically, discontinuing air flow into the room, thus, prevent spreading of fire.

Casing: 6.0mm thick mild steel sheetBlade Shafts: mild steel rod/square tube

Finish: Red Lead PrimerOFusible Link: 68 C (Option)

Fire Rating: 4 hours

5

4

3

2

1

STANDARD SIZESDamper Size: 150

Building E-F, Tiantou Industrial Area, Pingshan Street, PingshanNew District, Shenzhen City, Guandong Province, P.R.China.TEL: (86-755) 8993 7642 (852) 8302 4988FAX: (86-755) 8993 7775 (86-755) 8993 7286E-MAIL: [email protected]: www.luenming.com

11/F, Gemmy Factory Building, 12 Hung To Road, Kwun Tong, Kowloon, HongKong.TEL: (852) 2797 2168 FAX:(852) 2790 1254E-MAIL: [email protected]: www.luenming.com

PolyU Technology & Consultancy PolyU Technology & Consultancy Company Company 理大科技及顧問有限公司理大科技及顧問有限公司

CONSULTANCY SERVICE

for

Luen Ming Peng Shan Air Conditioning Factory Ltd.

(Ref: P09-0015)

Evaluation of the damper performance

Page 1

Project Description The Department of Mechanical Engineering, The Hong Kong Polytechnic University (PolyU) was mandated to measure the air damper casing, closed blade leakages and flow performance for four numbers of air damper: model 联明‘LM’VCD -500×300, model 联明‘LM’VCD -600×600, model 联明‘LM’NRD -600×600 and model 联明‘LM’FD -600×600 in accordance with the BS EN 1751:1999, Ventilation for buildings – Air terminal devices – Aerodynamic testing of dampers and valves. Results of air damper casing and closed blade leakages for model 联明‘LM’VCD -500×300 have been reported in the consultancy report (Ref: P08-0619). The tests were conducted inside the Fluid Mechanics Laboratory and outside the Acoustics Laboratory, Department of Mechanical Engineering, PolyU.

Project Team

Client: Luen Ming Peng Shan Air Conditioning Factory Ltd. Consultant: Dr. Tracy Y.S. Choy, Department of Mechanical Engineering, PolyU. Dr. Randolph C.K. Leung, Department of Mechanical Engineering,

PolyU. Supporting Staff: Dr. C.H. Ng, Department of Mechanical Engineering, PolyU. Mr. C.Y. Ho, Department of Mechanical Engineering, PolyU.

Date of Measurements

20-31 July 2009.

Location of Laboratories

Fluid Mechanics Laboratory (GH034), Department of Mechanical Engineering, PolyU. Space outside Acoustics Laboratory (DE001), Department of Mechanical Engineering, PolyU. Testing Environment: The leakage tests were conducted in the air-conditioned Fluid Mechanics Laboratory which

Page 2

provides a steady ambient temperature environment throughout the leakage tests. Since the size of the flow performance test rig was over 15m in length, the flow performance tests were conducted at the open space outside the Acoustics Laboratory, PolyU. The open space is a semi-enclosed environment where the disturbance from wind can be ignored.

References:

BS EN 1751:1999, Ventilation for buildings – Air terminal devices – Aerodynamic testing of dampers and valves, British Standards Institution. ISO 5221:1984, Air distribution and air diffusion – Rules to methods of measuring air flow rate in an air handling duct, International Organization for Standardization. HVCA DW/144, Specification for Sheet Metal Ductwork, Heating and Ventilating Contractors’ Association.

Instruments

Micro-manometer Model FCO12 (S/N FC0401114) manufactured by Furness Controls Limited, England.

AIRFLOW High velocity Ductwork Leakage Tester MK2 (S/N 45679) manufactured by Airflow Development Limited, England.

AIRFLOW High velocity Ductwork Leakage Tester manufactured by Airflow Development Limited, England.

Manometer Type Mk 4P (S/N 34458) manufactured by Airflow Development Limited, England.

Page 3

Client’s Provisions [1] Specimens Four numbers of air damper designed for medium pressure ductwork system (DW/144): A two opposed-blades 500×300×150mm (W×H×L) volume control damper (sVCD)

model 联明‘LM’VCD -500×300 (Figure 1); A five opposed-blades 600×600×150mm (W×H×L) volume control damper (VCD)

model 联明‘LM’VCD -600×600 (Figure 2). A five blades 600×600×150mm (W×H×L) non-return damper (NRD) model 联明

‘LM’NRD -600×600 (Figure 3); A five blades 600×600×200mm (W×H×L) fire damper (FD) model 联明‘LM’FD

-600×600 (Figure 4). [2] Equipment The air source and the associated ductworks as shown in Drawings 1 and 2, the ductwork used in the air damper leakage test as shown in Figure 5 and Figure 7, and an AIRFLOW High velocity Ductwork Leakage Tester were provided by the client.

Figure 1. Air Volume Control Damper Model 联明‘LM’VCD -500×300.

Page 4

Figure 2. Volume Control Damper Model 联明‘LM’VCD -600×600.

Figure 3. Non-return Damper Model 联明‘LM’NRD -600×600.

Page 5

Figure 4. Fire Damper Model 联明‘LM’FD -600×600.

Procedures for Casing Leakage Measurement (BS EN 1751:1999) The experimental set-up for casing leakage measurement was shown in Figure 5, 6 and 7. The instrument of the tester and manometer were shown in Figure 6. As shown in Figure 7, the downstream of the damper was sealed up with an end plate. 1. The damper was set to the open position. 2. Ductwork static pressure was increased to about 1000Pa and was checked if leakage

exists in the ductwork and connections. 3. Ductwork pressure was reduced to atmospheric pressure. 4. Ductwork static pressure was increased to about 50Pa and the pressure was maintained

for one minute. 5. Ductwork static pressure and the air flow rate from the air leakage tester were recorded. 6. Procedures 4 and 5 were repeated several times by increasing the ductwork static pressure

slightly until the maximum recommended pressure (i.e. 1kPa) was reached.

Page 6

Figure 5. Air damper leakage test setup.

Figure 6. Air damper leakage test instrument setup.

Figure 7. Damper case leakage test, damper covered with end plate.

Page 7

Procedures for Damper Closed Blade Measurement (BS EN 1751:1999) The experimental set-up for damper in fully closed and open condition was shown in Figure 8 and 9 respectively. The downstream end plate installed in casing leakage measurement is removed. The testing instrument of manometer and leakage tester used in this experiment was shown in Figure 6. The procedure of the test is listed as follows. 1. The damper was cycled 10 times between fully open and fully closed position. 2. The damper was set to the closed position (Figure 8). 3. The ductwork static pressure was increased to about 50Pa and the pressure was kept for

one minute. 4. Supply air flow rate was kept and the damper was modulated to the open position (Figure

9) and then was returned to the closed position (Figure 8). 5. Ductwork static pressure and the air flow rate from the air leakage tester were recorded. 6. Procedures 3 to 5 were repeated several times by increasing the ductwork static pressure

slightly until the maximum recommended pressure (i.e. 1kPa) was reached.

Figure 8. Damper blades leakage test, blades closed.

Page 8

Figure 9. Damper blades leakage test, blades opened.

Figure 10. Flow performance test rig for 500 × 300 mm damper

as viewed from the outlet.

Page 9

Figure 11. Flow performance test rig for 500 × 300 mm damper as viewed from the fan inlet.


as viewed from the outlet.

Page 10


as viewed from the fan inlet.

Page 11

Procedures for Flow rate and Pressure Test (BS EN 1751:1999 & ISO 5221:1984) Two sizes of air damper were supplied by the client, 500 × 300 mm and 600 × 600 mm (W × D). The configuration of the test rigs for each damper size is illustrated in Drawing 1 (p.33) and 2 (p.34) respectively. The experimental Set-up for flow-rate measurements are shown in Figure 10 to 11 for 500 × 300 damper and Figure 12 and 13 for 600 × 600 dampers correspondingly. 1. Uniformity test was conducted at the static pressure measurement plane prior to the flow

rate and pressure test commenced. Velocity survey has been conducted at 10 equally spaced intervals along the vertical and horizontal axes.

2. The damper was set to the open position (except the NRD). 3. Ambient atmospheric pressure was recorded. 4. The fan was adjusted to a flow rate where the static pressure of the ductwork reached

10Pa (For the 600 × 600 dampers, the VCD at the end of the ductwork was adjusted to ¾ opening).

5. Flow speeds and static pressure at the corresponding measurement planes were recorded (i.e. the pressure loss for the ductwork plus the specimen was found).

6. Air temperature inside the ductwork at the flow speed measurement and the static pressure measurement plane were recorded.

7. Four more flow rates were tested by repeating procedures 3 to 6. 8. For volume control dampers, procedures 2 to 7 were repeated for ¾, ½ and ¼ opening

positions. 9. The specimen was removed from the test rig, procedures 5 to 7 were repeated for similar

flow rates conducted and hence the pressure loss for the ductwork was found. 10. The pressure loss for each specimen was found by subtracting the corresponding result in

procedure 5 by that from procedure 9.

Page 12

Results Air Damper Case and Damper Blades’ Leakages Details of the damper casing and closed blade leakage results are tabulated in Table 1 and Table 2 for VCD, Table 3 and Table 4 for NRD, and Table 5 and Table 6 for FD respectively. Summary of the measurement data are shown in Figure 14 to Figure 19 for all dampers’ casing and closed blade leakages correspondingly. Classification of the damper casing and closed blade leakage in accordance with the BS EN 1751:1999 standard for medium-ductwork pressure as defined in HVCA standard DW/144 for all specimens are summarised in the following table:

600 × 600 mm dampers Case Leakage Closed Blade Leakage

VCD Class A Class 3

NRD Class A Class 1

FD Class B #Class 1 # Due to the limited capacity of the air leakage tester, the maximum leakage flow-rate done

in this test was 61.1 L/s at 210 Pa. Air Damper Flow Performance Results of uniformity tests of the velocity profiles for both test rigs (Drawings 1 and 2) are tabulated in and Table 7 and Table 8 and illustrated in Figure 20 and Figure 21 correspondingly. No measurement point exceeded 10% of the mean value over the test duct cross-section for both test rigs. Therefore, the test rigs were suitable for carrying out the air damper flow performance tests. There were no significant differences in the air temperature and static pressure between flow measurement plane and the damper under all tests. As a result, no correction is required for the measured flow rates. Flow rate and pressure requirement for all air dampers are plotted in Figure 22 to Figure 31. From these graphs, pressure drop within the tested flow ranges for each air damper can be deduced and the pressure drop against duct velocity for all air dampers are illustrated in Figure 32 to Figure 35.

Page 13

Table 1. Results for VCD case leakages. Duct Static Pressure Case Leakage

(Pa) (l/s.m2) 59 0.1474 82 0.1828 100 0.2038 107 0.2121 129 0.2303 165 0.2734 193 0.2954 222 0.3158 256 0.3464 300 0.3788 352 0.4100 388 0.4311 464 0.4716 526 0.5152 634 0.5553 718 0.6016 800 0.6410 864 0.6676 934 0.7124

Table 2. Results for VCD closed blade leakages. Duct Static Pressure Closed Blade Leakage

(Pa) (l/s.m2) 67 4.7744 76 5.1094 88 5.8861 129 6.9276 157 7.7745 208 9.7243 232 9.8895 262 10.9097 330 11.6034 389 12.0680 455 13.0499 506 14.1372 584 15.4532 654 16.7009 764 18.6906 880 20.5870 984 22.3747

Table 3. Results for NRD case leakages. Duct Static Pressure Case Leakage

(Pa) (l/s.m2) 73 0.1696 79 0.1796 107 0.2148 125 0.2377 162 0.2713 175 0.2915 193 0.3048 218 0.3228 240 0.3448 275 0.3832 310 0.4154 352 0.4337 410 0.4934 476 0.5382 530 0.5737 668 0.6520 776 0.7147 780 0.7093 850 0.7493 958 0.8074

Table 4. Results for NRD closed blade leakages. Duct Static Pressure Closed Blade Leakage

(Pa) (l/s.m2) 62 80.3867 91 87.1103 128 92.4424 174 99.6859 231 99.9976 300 107.0063 346 111.2725 418 115.8234 490 119.7672 570 124.8266 680 133.5917 800 142.8831 900 149.6016 980 154.2385 1040 158.7418

Page 15

Table 5. Results for FD case leakages. Duct Static Pressure Case Leakage

(Pa) (l/s.m2) 58 0.1107 66 0.1160 70 0.1258 124 0.1625 160 0.1796 175 0.1951 212 0.2148 270 0.2494 317 0.2606 364 0.2836 430 0.3158 487 0.3365 540 0.3653 638 0.3890 736 0.4220 812 0.4413 934 0.4693

Table 6. Results for FD closed blade leakages. Duct Static Pressure Closed Blade Leakage

(Pa) (l/s.m2) 53 67.8330 64 77.5574 78 88.1161 90 98.5933 102 107.8518 118 116.6171 136 125.4382 150 134.0019 168 142.0361 194 156.7311 210 169.6924

Page 16

Table 7. Velocity Profiles for 500 × 300 mm test rig. Vertical axis Horizontal Axis

(m/s) % (m/s) % 11.1 -4% 10.0 7% 11.2 -5% 10.1 6% 11.0 -3% 11.0 -3% 11.0 -3% 10.7 0% 11.2 -5% 10.9 -2% 11.4 -6% 10.4 3% 10.8 -1% 11.0 -3% 10.1 6% 11.0 -3% 10.2 5% 10.9 -2% 9.9 8% 10.3 4% Average Speed 10.7 m/s

Table 8. Velocity Profiles for 600 × 600 mm test rig. Vertical axis Horizontal Axis

(m/s) % (m/s) % 6.9 8% 7.6 -2% 6.9 8% 7.7 -3% 7.3 2% 7.8 -5% 7.5 -1% 7.5 -1% 7.5 -1% 7.7 -3% 7.6 -2% 7.8 -5% 7.5 -1% 7.8 -5% 8 -7% 7.5 -1%

7.7 -3% 7.2 3% 6.8 9% 6.9 8% Average Speed 7.5 m/s

Page 17

Date of testing: 31 July 2009 Time: 10:00~11:15

Location: Fluid Mechanics Laboratory at GH034, PolyU

Damper Model: 联明‘LM’VCD

-600×600 Material: Galvanised Steel

Damper Width (mm): 600 No. of blades: 5

Damper Height (mm): 600 Damper Control: Manual

Damper Length (mm): 150 Ambient Temperature (°C): 19.0

Damper Free Area (m2): 0.36

Atmospheric Pressure (mm Hg): 776.5

Leakage Test Type: Case Test Basis: BS EN 1751:1999

Leakage Classification: Class A Upper Duct Static Pressure (Pa): 1000

Damper Case Leakage

Leakage qVLBA in l/(s.m2)

0.1 0.2 0.3 0.4 0.5 1 2 3 4

Duc

t Pre

ssur

e p s

in P

a

10

20

30

4050

100

200

300

400500

1000

2000Class B Class AClass C

Note: Graph reproduced from BS EN 1751:1999 Figure C.2.

Test By: C.Y. Ho Witness By: C.H. Ng

Figure 14. Test summary for VCD casing leakage.

Page 18



Damper Model: 联明‘LM’VCD




Damper Length (mm): 150 Damper Free Area (m2): 0.36

Ambient Temperature (°C): 19.0


Leakage Test Type: Damper Test Basis: BS EN 1751:1999

Leakage Classification: Class 3 Upper Duct Static Pressure (Pa): 1000

Damper Closed Blade Leakage


1 2 3 4 5 10 20 30 50 100 200 300 500 1000 2000

Duc

t Pre

ssur

e p s

in P

a

50

100

200

300

400

500

1000

2000 Class 2 Class 1Class 3Class 4

Class 0: no control on leakageNote: Graph reproduced from BS EN 1751:1999 Figure C.1.


Figure 15. Test summary for VCD closed blade leakage.

Page 19



Damper Model: 联明‘LM’NRD








Leakage Classification: Class A Upper Duct Static Pressure (Pa): 1000

Damper Case Leakage


0.1 0.2 0.3 0.4 0.5 1 2 3 4

Duc

t Pre

ssur

e p s

in P

a

10

20

30

4050

100

200

300

400500

1000




Figure 16. Test summary for NRD casing leakage.

Page 20



Damper Model: 联明‘LM’NRD -600×600

Material: Galvanised Steel










1 2 3 4 5 10 20 30 50 100 200 300 500 1000 2000

Duc

t Pre

ssur

e p s

in P

a

50

100

200

300

400

500

1000




Figure 17. Test summary for NRD closed blade leakage.

Page 21



Damper Model: 联明‘LM’FD -600×600








Leakage Classification: Class B Upper Duct Static Pressure (Pa): 1000

Damper Case Leakage


0.1 0.2 0.3 0.4 0.5 1 2 3 4

Duc

t Pre

ssur

e p s

in P

a

10

20

30

4050

100

200

300

400500

1000




Figure 18. Test summary for FD casing leakage.

Page 22



Damper Model: 联明‘LM’FD -600×600 Material: Galvanised Steel










1 2 3 4 5 10 20 30 50 100 200 300 500 1000 2000

Duc

t Pre

ssur

e p s

in P

a

50

100

200

300

400

500

1000




Figure 19. Test summary for FD closed blade leakage.

Page 23

Location

1 2 3 4 5 6 7 8 9 10

Velo

city

[m/s

]

9.0

9.5

10.0

10.5

11.0

11.5

12.0

+10%

-10%

Mean

Horizontal Axis

Vertical Axis

Figure 20. Velocity profiles for 500 × 300 mm test rig.

Location

1 2 3 4 5 6 7 8 9 10

Velo

city

[m/s

]

6.0

6.5

7.0

7.5

8.0

8.5

9.0

+10%

-10%

Mean

Horizontal AxisVertical Axis

Figure 21. Velocity profiles for 600 × 600 mm test rig.

Page 24

q2vin, [ (m3/s)

2

]

0.0 0.5 1.0 1.5 2.0 2.5

p si(a

), [P

a]

0

20

40

60

80

10010 m/s

Figure 22. Flow rate and pressure requirement of sVCD at fully open condition. : With damper; : Without damper; “–––” : Regression line; “---” : ± 5% of the regression line.

q2vin, [ (m3/s)

2

]

0.0 0.5 1.0 1.5 2.0 2.5 3.0

p si(a

), [P

a]

0

50

100

150

200

250

30010 m/s

Figure 23. Flow rate and pressure requirement of sVCD at ¾ open condition. Legends: same as those in Figure 22.

Page 25

q2vin, [ (m3/s)

2

]

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4

p si(a

), [P

a]

0

200

400

600

800

1000

Figure 24. Flow rate and pressure requirement of sVCD at ½ open condition.

Legends: same as those in Figure 22.

q2vin, [ (m3/s)

2

]

0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14

p si(a

), [P

a]

0

200

400

600

800

1000

1200

1400

Figure 25. Flow rate and pressure requirement of sVCD at ¼ open condition. Legends: same as those in Figure 22. (Lines and symbols for without damper are too small for display)

Page 26

q2vin, [ (m3/s)

2

]

0 5 10 15 20

p si(a

), [P

a]

0

100

200

300

400

50010 m/s

Figure 26. Flow rate and pressure requirement of VCD at fully open condition.


q2vin, [ (m3/s)

2

]

0 5 10 15 20

p si(a

), [P

a]

0

100

200

300

400

50010 m/s

Figure 27. Flow rate and pressure requirement of VCD at ¾ open condition.


Page 27

q2vin, [ (m3/s)

2

]

0 2 4 6 8 10

p si(a

), [P

a]

0

200

400

600

800

1000

Figure 28. Flow rate and pressure requirement of VCD at ½ open condition.


q2vin, [ (m3/s)

2

]

0.0 0.1 0.2 0.3 0.4 0.5

p si(a

), [P

a]

0

200

400

600

800

1000

1200

1400

Figure 29. Flow rate and pressure requirement of VCD at ¼ open condition.


Page 28

q2vin, [ (m3/s)

2

]

0 5 10 15 20

p si(a

), [P

a]

0

100

200

300

400

50010 m/s

Figure 30. Flow rate and pressure requirement of NRD at fully open condition.


q2vin, [ (m3/s)

2

]

0 5 10 15 20

p si(a

), [P

a]

0

100

200

300

400

50010 m/s

Figure 31. Flow rate and pressure requirement of FD at fully open condition.


Page 29

Date of testing: 24 July 2009 Time: N/A

Location: Space outside Acoustics Laboratory at DE001, PolyU

Damper Model: 联明‘LM’VCD -500×300




Damper Length (mm): 150 Test Basis: BS EN 1751:1999 Damper Free Area

(m2): 0.15 Upper Duct Static

Pressure (Pa): 1000

Duct Velocity, [m/s]

0.5 1 2 5 10

Pres

sure

Dro

p, [P

a]

1

2

5

10

20

50

100

200

500

1000

Fully

Ope

n

3/4 O

pen

1/2 O

pen

1/4 O

pen

Regression Lines

Fully Open Pressure Drop = 0.37250775 × (Duct Velocity)2

¾ Open Pressure Drop = 2.10617775 × (Duct Velocity)2

½ Open Pressure Drop = 23.26936275 × (Duct Velocity)2

¼ Open Pressure Drop = 260.78161275 × (Duct Velocity)2


Figure 32. Test summary for sVCD flow performance.

Page 30



Damper Model: 联明‘LM’VCD -600×600






Pressure (Pa): 1000


0.5 1 2 5 10

Pres

sure

Dro

p, [P

a]

1

2

5

10

20

50

100

200

500

1000

Fully

Ope

n3/4

Open

1/2 O

pen

1/4 O

pen

Regression Lines


¾ Open Pressure Drop = 0.8431776 × (Duct Velocity)2

½ Open Pressure Drop = 10.8453168 × (Duct Velocity)2

¼ Open Pressure Drop = 342.4554288 × (Duct Velocity)2


Figure 33. Test summary for VCD flow performance.

Page 31

Date of testing: 22 July 2009 Time: N/A Location: Space outside Acoustics Laboratory at DE001, PolyU

Damper Model: 联明‘LM’NRD






Pressure (Pa): 500


0.5 1 2 5 10

Pres

sure

Dro

p, [P

a]

1

2

5

10

20

50

100

Fully

Ope

n

Regression Lines


¾ Open N/A

½ Open N/A

¼ Open N/A


Figure 34. Test summary for NRD flow performance.

Page 32



Damper Model: 联明‘LM’FD -600×600






Pressure (Pa): 500


0.5 1 2 5 10

Pres

sure

Dro

p, [P

a]

1

2

5

10

20

50

100

Fully

Ope

n

Regression Lines


¾ Open N/A

½ Open N/A

¼ Open N/A


Figure 35. Test summary for FD flow performance.

Page 33

序号开工年份

1. 2008

2. 2009

3. 2009

4. 2009

5. 2010

6. 2011

7. 2011

8. 2011

9. 2011

10. 2011

11. 2011

12. 2012

13. 2012

14. 2012

15. 2013

16. 2013

17. 2013

工程项目

* 火炭体育学院

太古城酒店

中环添马舰（政府总部）

Tel:(852) 2797 2168 Fax:(852) 2790 1254Tel:(86-755) 8993 7642 (852) 8302 4988 Fax:(86-755) 8993 7286

西九龙KIL11073

将军澳HKDI/HKIVELWL

西九龙海庭道KIL11167/68

Kwun Tong,Kowloon,HongKong.

E-mail:[email protected]

Pingshan New District,Shenzhen City,P.R.China

E-mail:[email protected]

联明LocalMade防火闸(FD)工程参考

Building E-F, Tiantou Industrial Area, Pingshan Street,深圳市坪山新区坪山街道田头工业区E-F栋香港九龍官塘創業街36號華基中心7字9室

Flat.9,7/F.,Ricky Centre,36 Chong Yip Street,

将军澳综合大楼44区

* 理工8期

中环利源东街

* 理工创新楼

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标有*号的项目均为联明公司供应及安装

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Pingshan New District,Shenzhen City,P.R.China Kwun Tong,Kowloon,HongKong.Tel:(86-755) 8993 7642 (852) 8302 4988 Fax:(86-755) 8993 7286 Tel:(852) 2797 2168 Fax:(852) 2790 1254E-mail:[email protected] E-mail:[email protected]

将军澳新都城2期


深圳市坪山新区坪山街道田头工业区E-F栋香港九龍官塘創業街36號華基中心7字9室

Building E-F, Tiantou Industrial Area, Pingshan Street, Flat.9,7/F.,Ricky Centre,36 Chong Yip Street,

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工程项目

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湾仔皇后大道东281号华仁中学

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50. 2015

51. 2015

Pingshan New District,Shenzhen City,P.R.China Kwun Tong,Kowloon,HongKong.Tel:(86-755) 8993 7642 (852) 8302 4988 Fax:(86-755) 8993 7286 Tel:(852) 2797 2168 Fax:(852) 2790 1254E-mail:[email protected] E-mail:[email protected]

尖沙咀海运大厦


深圳市坪山新区坪山街道田头工业区E-F栋香港九龍官塘創業街36號華基中心7字9室

Building E-F, Tiantou Industrial Area, Pingshan Street, Flat.9,7/F.,Ricky Centre,36 Chong Yip Street,

圣保禄医院

红磡香格里拉酒店

西贡大埔仔16座

将军澳新都城二期

白沙湾码头

天水围天盛商场

科技大学

尖沙咀美丽华商场

太古城2期

将军澳日出康城第三期

沙田石门安丽街沙田中心中电大厦

元朗西铁站


工程项目

九龙塘浸会大学

沙田希尔顿中心

中环新世界大厦

上水双鱼河马会

Fire DamperFire Damper---11: Cover2: Fire Damper-013: Fire Damper-02

Fire DamperFire Damper21: Cover2: Fire Damper-013: Fire Damper-02

010203040506070809101112131415Dampers_Tests20090811PolyU Technology & ConsultancyCompany Limited理大科技及顧問有限公司CONSULTANCY SERVICEfor

Project DescriptionProject TeamDate of MeasurementsLocation of LaboratoriesTesting Environment:References:InstrumentsClient’s ProvisionsProcedures for Casing Leakage Measurement (BS EN 1751:1999)Procedures for Damper Closed Blade Measurement (BS EN 1751:1999)Procedures for Flow rate and Pressure Test (BS EN 1751:1999 & ISO 5221:1984)Results

Job Reference for FDFDFD (2)FD (3)

Documents

APPLICATION Damper.pdfAPPLICATION CONSTRUCTION Fire Damper is generally used for control in air distribution system. In event of fire, Fire Damper will shut automatically, discontinuing