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BUTTERFLY VALVE
DN40-DN300 Butterfly valve
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DN50-DN150 Thread End Butterfly Valve
DN50-DN300 Groove End Butterfly Valve
DN50-DN1200Flange Type Butterfly valve
CHECK VALVE
DN50-DN800 Wafer Type Dual-Plate Check valve
DN15-DN400 Wafer Type Single-Plate Check Valve
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HomeProducts   → CHECK VALVE  →  DN50-DN800 Wafer Type Dual-Plate Check valve
DN50-DN800 Wafer Type Dual-Plate Check valve
 
 
Medium Capability:
Freshwater, Sea water, Air, steam, food, medicine and kinds of oil, acid, alkali, salt.
Feature:
Long service life with reliable seal and without frequent maintenance. Butterfly valve have flow characteristics three times better than globe valve, and about 75% of a same size gate valve。Butterfly valve can be used for on/off service and throttling,They are superior in Multi-function as compared to gate or globe valves. Butterfly valve can be widely used in chemical field due to trim options and choice of elastomeric liner . 
Butterfly valve have feature of light in weight and small in size, for example, weight andsize of a 10” butterfly valve are 1/9 and 1/6 of a 10” gate valve. So butterfly valve is easy to install and save cost of piping system. Butterfly valve with resilient seat design can be bubble tight as compared to metal seated gate or globe valves. Butterfly valves offer 90-degree open to close. Butterfly valve is approximate 35-40% cost of a same size gate valve. Also low installed cost than gate valve. 
Properly installed butterfly valves are self cleaning and are less susceptible to failure due to trash material in pipe.
    

Item

Qty

Parts Name

1

1

Body

2

1

Seat

3

2

Disc

4

2

Spring

5

2

Stem

Structure and Parts List for Dual Plate Check Valve
Nominal Pressure: PN10/PN16


Technical Specification for Dual Plate Check Valve
 

Size

DN40~DN800

DN40~DN600

Pressure

1.0MPa

1.6MPa


Test
Pressure

 

Shell

1.1MPa

1.76MPa

Seat

1.5MPa

2.4MPa

Service

Temperature

1-EPDM

-30~+110

2-Neoplene

-7~+93

3-NBR

-12~+82

4-Viton

+10~+150

Service Fluid

Freshwater, Sea water, Air, steam, food, medicine and kinds of oil, acid, alkali, salt.


Pressure Loss Chart

 

Body

DISC

Stem

Bushing

Seat

Material

 

Material

 

WorkingTemperature

()

C.I

DI

416SS

Lubricative Bronze

NR

-20-+85

D.I

WCB

431SS

Macromolecule +PTFE

HYPALON

-18-+135

WCB

AL-Brz

316SS

316SS+PTFE

EPDM

-30-+110

AL-Brz

Stainless Steel

 

 

NEOPRENE

-7-+93

StainlessSteel

 

 

 

NBR

-12-+82

 

 

 

 

WRR

-10-+50

 

 

 

 

VITON

-23-+150

 

 

 

 

HRR

-20-+150

 

 

 

 

PTFE

+10-+150


Outline Dimensions and Weight for Wafer Type Dual Plate Check Valve
 

Size

D

D1

D2

L

R

T

Weight

Kgs.

inch

mm

2

50

107

65

43.3

43

28.8

19

1.5

2 1/2

65

127

80

60.2

46

36.1

20

2.4

3

80

142

94

66.4

64

43.4

28

3.6

4

100

162

117

90.8

64

52.8

27

5.7

5

125

192

145

116.9

70

65.7

30

7.3

6

150

218

170

144.6

76

78.6

31

9.0

8

200

273

224

198.2

89

104.4

33

17.0

10

250

328

265

233.7

114

127

50

26.0

12

300

378

310

279.05

114

146

43

37.0

14

350

438

360

327.87

127

170

45

54.9

16

400

489

410

375.88

140

195

52

78.0

18

450

555

450

414.06

152

215

58

119.0

20

500

594

505

467.83

152

241

58

122.0

24

600

700

624

569.59

178

294

73

174.0

28

700

820

720

662.75

229

345

96

219.0

32

800

930

825

762.72

241

394

99

316.0