Mesh Belt Dryer,Drying Oven Co., Ltd. , http://www.js-dryer.com
Introduction
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. The disc is positioned in the center of the pipe, passing through the disc is a rod connected to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the flow. 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.
Specification
Materials of major parts
No.
Part
Material
1
Body
Ductile Iron
2
Disc
DI/SS/Bronze
3
Stem
SS304/316
4
O-ring
EPDM/NBR/VITON
5
Seat
EPDM/PTFE
6
Bushing
PTFE/Bronzel
7
Hand Wheel
Cast Iron
8
Worm Gear
Cast Iron
Dimensioons(mm)
DN
L
L1
Φ
H1
H2
H3
N
Φ3
40
42
250
110
66.5
142
26
4
18
50
42.3
260
125
66.5
142
26
4
18
65
43.3
280
145
74.1
151
26
4
18
80
45.6
284
160
94
161
26
4
18
100
50.6
357
180
110.8
181
26
4
18
125
53.6
374
210
128.8
191
28
4
18
150
54.4
374
240
140.5
204
28
4
22
200
59.6
384
295
172.5
238
29
4
22
250
65.4
384
350
206.2
268
29
4
22/26
300
75
537
400
235.8
306
30
4
22/26
Other Fire Fighting Equipment
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Model NO.: DN40-DN300
Working Temperature: Normal Temperature (-40°C<T<120°C)
Material of Seal Surface: Soft Sealed
Valve Body: Casting
Application: Industrial Usage, Water Industrial Usage, Household Usage
Disc: Ductile Iron/Stainless Steel
Body: Ductile Iron
Spindle: Stainless Steel
Coating: Epoxy Coated
Pressure Rate: Pn10/16
Trademark: None/OEM
Transport Package: Standard Export Package
Specification: DN40-DN600
Origin: Fujian
HS Code: 8481801090
Cast Iron Non-Rising Resilient Seat Gate ValveÂ
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