Butterfly ValveElectric wafer lug type eccentric DN30

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200 set
Supply Capability:
80000 set/month

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Product Description:

1. Manual Wafer Butterfly Valve Description

A butterfly valve consists of body ,stem ,disc , actuator (manual actuator, wormgear actuator , aerodynamic actuator or electric actuator) , and wafer type butterfly valve can implement the process for turning on turning off and regulating the flow by the circumrotation of stem and disc  that is droved by actuators.A butterfly valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk. Operation is similar to that of a ball valve, which allows for quick shut off. Butterfly valves are generally favored because they are lower in cost to other valve designs as well as being lighter in weight, meaning less support is required. Unlike a ball valve, the disc is always present within the flow, therefore a pressure drop is always induced in the flow, regardless of valve position.

2.Main Features of the Manual Wafer Butterfly Valve 

Design & Manufacture acc. to API 609,MSS SP-67,BS5155,BS EN593.

Face to Face  acc. to DIN3202,API609,MSS SP-67,BS5155,BS EN558.

Top Flange acc. to ISO5211.

Pressure test acc. to  API598,BS EN12266-1,DIN3230,BS5155.

Side Flange acc. to DIN2501,ANSI125/150,AS2129,BS4504,BS10D&E,JIS10K

Nominal bore  mm

20

25

32

40

50

65

80

100

125

150

200

Valve core diameter  mm

10

12

15

20

25

32

40

50

65

80

100

125

150

200

Rated flux coefficient Kv

1.2

2

3.2

5

8

12

20

32

50

80

120

200

280

450

Nominal pressure Mpa

1.6 4 6.4

Match DKJ actuator

                              

specification

DKZ-4100

DKZ-4200

DKZ-4300

DKZ-5400

DKZ-5500

Differential pressure Mpa

6.4

4.0

4.0

4.0

3.5

2.3

2.0

1.42

1.4

0.91

0.55

0.35

0.26

0.17

Match introduced actuator

specification

A+Z64

Differential pressure Mpa

6.4

6.4

4.0

4.0

3.7

2.5

2.2

1.6

1.5

1.0

0.6

0.4

0.3

0.2

Rated travel mm

10

16

25

40

40

Flux characteristic

Equal percentage Beeline

Function style

Volt on  Volt off

Temperature range

Normal temperature: -20 — +200 degree abstraction of heat: -60 — +450 degree

3. Manual Wafer Butterfly Valve Images

 Butterfly ValveElectric wafer lug type eccentric DN30

 

Butterfly ValveElectric wafer lug type eccentric DN30

 

4.Manual Wafer Butterfly Valve  Specification 

Size:

DN50-DN1000

End flange:

ANSI B 16.1,EN1092,AS2129

Face to face:

ANSI B 16.10

Top flange:

ISO 5211

Normal pressure:

PN1.0/1.6MPa(150/200PSI)

Body:

CI/DI/WCB/ALB/CF8/CF8M

Disc:

DI/ALB/Rubber lined Disc/1.2501/1.4529/CF8/Hastelloy Alloy/Monel

Stem:

410/416/304/431/17-4PH/316/monel

Seat:

NBR/Hypalon/EPDM/Neoprene/NR/Wear-Resistant EPDM/Viton/Silicon/Heat-Resistant EPDM/White EPDM/EPDM(NSF)/PTFE

Suitable temperature:

-10~120

Medium:

Fresh water, sewage, sea water, air, vapor, food, medicine, oils, alkalis, salt etc. 

 5.FAQ

 1. What is manual wafer butterfly valve?

A: Wafer style is the more common of the two and is less expensive than the lug style. The wafer style butterfly valve is just about the standard. It ís so common that no one even bothers to use the word "wafer" when ordering a butterfly valve. It is taken for granted that if a butterfly valve is ordered, a wafer style will be received.

 

2. How about the Installation of the Wafer Style Butterfly Valve?
A: Butterfly valves are installed by inserting the valve between two flanges using bolts or studs and nuts to hold it all together. This type of installation, of course, makes it impossible to disconnect just one side of the piping system from the valve. That benefit is received using the lug style valve.

 

3. What is the working principle of manual wafer butterfly valve?

 A: A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The "butterfly" is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is fully open, the disc is rotated a quarter turn so that it allows an almost unrestricted passage of the fluid. The valve may also be opened incrementally to throttle flow.

 

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