Double Offset High Performance Butterfly valve
Short Description:
High performance butterfly valve is our company’s main designed product. This high performance are designed with double Eccentric structure with reliable sealing performance, widely working conditions and low operating torque, it is with long service life and fire safe in special conditions.
The series of high-performance wafer type butterfly valves uses various structure materials, including those that meet NACE requirements and anticorrosive materials. Special valves that can be used in chlorine, oxygen, high vacuum, corrosive media and cryogenic condition are also available.
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VALVE SIZE |
||
|
CLASS 150 WAFER |
1.5”-60” |
DN40-DN1500 |
|
CLASS 150 LUG |
2”-60” |
DN50-DN1500 |
|
CLASS 150 DOUBLE FLANGE |
3”-60” |
DN80-DN1500 |
|
CLASS 300 WAFER |
2”-24” |
DN50-DN600 |
|
CLASS 300 LUG |
2.5”-24” |
DN65-DN600 |
|
CLASS 300 DOUBLE FLANGE |
3”-24” |
DN80-DN600 |
The high performance Butterfly valve Constructure as below:
Design of offset shaft and eccentric butterfly plate
- The seat and butterfly plate do not contact each other when the valve is opened or at the middle position.
- There is no wear point at the upper and lower parts of the seat.
-Low torque with low requirement for operating mechanism.
Features
- The unique dynamic load seal PTFE seat design is adopted with good elasticity and high reliability
- Sealing can be maintained without the need of adding 0 ring or metal part
- The lip type sealing structure can compensate for the changes of temperature and pressure.
-Long service life and low maintenance.
-In seal test, there is no bubble and leakage at both directions.
Fire resistant structure
The fire-resistant type valve is subjected to fire test according to APl 607.
Seat type
EPDM, PTFE, R-PTFE, Fireproof seat, etc.
Reliable fixing of shaft
The anti-blow-out structure is provided at the top of the shaft to prevent the shaft from running out of the gland in case of accidental breaking of the shaft.
Convenient seat maintenance and servicing
The seat can be replaced just through removing the inserts without need of disassembling the butterfly valve and shaft.
Provided with shut-off and control functions
-Having excellent control characteristics-Proportional change of flow characteristic curve
- Wide adjusting range
- Tight sealing can be realized even when it is used for control.
Flow parameters
The flow coefficient of 150lb and 300lb butterfly valves is listed in the following table. Cv value indicates water flow per minute that passes through the fully opened valve when the
differential pressure is 1psi (0.07bar) and the temperature is 60°F(15.6℃), and its unit is US gal/min
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150CLASS |
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|
VALVE SIZE |
CV |
|
|
INCH |
DN |
|
|
2 |
50 |
57 |
|
2-1/2 |
65 |
78 |
|
3 |
80 |
165 |
|
4 |
100 |
400 |
|
5 |
125 |
650 |
|
6 |
150 |
1050 |
|
8 |
200 |
2200 |
|
10 |
250 |
3300 |
|
12 |
300 |
5100 |
|
14 |
350 |
5800 |
|
16 |
400 |
8000 |
|
18 |
450 |
10500 |
|
20 |
500 |
14000 |
|
24 |
600 |
21600 |
|
30 |
750 |
34000 |
|
36 |
900 |
55500 |
|
42 |
1050 |
82650 |
|
48 |
1200 |
108300 |
|
54 |
1350 |
133500 |
|
60 |
1500 |
159000 |
|
300CLASS |
||
|
VALVE SIZE |
CV |
|
|
INCH |
DN |
|
|
2-1/2 |
65 |
78 |
|
3 |
80 |
165 |
|
4 |
100 |
400 |
|
6 |
150 |
1050 |
|
8 |
200 |
1800 |
|
10 |
250 |
3150 |
|
12 |
300 |
4750 |
|
14 |
350 |
5200 |
|
16 |
400 |
6900 |
|
18 |
450 |
9300 |
|
20 |
500 |
11300 |
|
24 |
600 |
18500 |
|
30 |
750 |
29100 |
|
36 |
900 |
47500 |
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