Concentric Cast Iron Wafer Butterfly Valve with Hard Back Seat
Size: DN40-600
Body: GG25, GGG40,
Disc: CF8/ CF8M/ GGG40/ Al-Br
Seat: NBR/EPDM/PDFE /VITON
Color: Any color according to customer requirement
Working pressure: PN10/ 16
Flange standard: PN10/ 16/ ANSI150
Brief introduction of wafer type spline butterfly valve
1. Wafer type spline butterfly valve, designed to comply with MSS-SP-67, BS5155, and API609. Compatible with GB, DIN, BS, ANSI flanges. Face to face according to ISO 5752.
2. Characteristic of wafer type spline butterfly valve is to splice the rubber liner on the body, the strength more highly and the seal more reliably for the seat.
3. The spline is between the shaft and disc.
4. Available in size 1.5'-24'.
5. Available with handles, manual gear operators, and electric or pneumatic actuators
- Industrial Use
The butterfly valves are widely used in piping of chemical, food, medicine, paper making, water and electricity, shipbuilding, water supply and drainage, metallurgy and energy systems, and is available for regulating and closure devices in a variety of corrosive, non - corrosive gas, liquid, semi-liquid and solid powder pipelines and containers.
- Performance Specification
| Nominal Diameter (DN) |
25(1")~600(24") |
25(1")~600(24") |
DN (inch) |
| Nominal Pressure (PN) |
10 |
16 |
BAR
|
| Test Pressure |
Body |
15 |
24 |
| Sealing |
11 |
17.6 |
| Working temperatureºC |
-15ºC~+150ºC |
| Applicable Mediums |
Fresh water, sewage, sea water, air, steam, food, drug, various oil, acid, alkali, salt, etc. |
Note: Applicable temperature and mediums are depending on the materials of different valve seats, bodies, stems and discs, see table 1 and table 2:
Regular Material of the Main Parts (Table 1)
| Body |
Disc |
Stem |
| Name |
Code |
Name |
Code |
Name |
Code |
| Cast Iron |
GG25 |
Electric-plated
DI |
GGG40+Ni |
Stainless Steel |
416/316 |
| Ductile Iron(DI) |
GGG40 |
AL-Bronze |
C954/C958 |
|
431/17-4 |
| AL-Bronze |
C954/C958 |
Stainless Steel |
CF8/CF8M |
|
|
| Stainless Steel |
CF8/CF8M |
Coating DI |
GGG40+Nylon |
|
|
| Carbon Steel |
WCB |
|
|
|
|
Properties of Valve Seat (Table 2)
| Seat |
Applicable TemperatureºC |
Applicable Medium |
| Name |
| HYPALON |
-15ºC~+120ºC |
Water, some kind of oil and moderate chemicals, ozone, fat, animal fat, several of solvents, high and low pressure steam are forbidden. |
| EPR |
-15ºC~+121ºC |
Ozone, strong and chemical oxidation, several of solvents, alcohol, acid and alkali, low pressure steam, air, water, heavy water, sewage, hot and cold water. |
| CR |
-15ºC~+99ºC |
Air, water, heavy water, oil, moderate chemicals, acids, ozone, fat, animal fat, several of solvents. |
| NBR |
-15ºC~+82ºC |
Water, sea water, air, gases, chemicals, alcohol, the non aromatic agent, kerosene, animal and plant oil, light grinding medium, shall not apply to phosphate series oil and extreme pressure additive oil. |
| DRC |
-10ºC~+50ºC |
Mainly suitable for semiliquid and solid powder medium, such as mud, coal slurry, cement powder, coal powder and other powder materials. |
| VITON |
-15ºC~+135ºC |
Water, sea water, sewage, alcohol, paraffin wax, oxygen, air, etc. High Chemical resistance, especially suitable for aliphatic fragrances in high temperature environment, and animal & plant oil with halogenated hydrocarbon acid. High and low pressure steam is forbidden. |
| EPDM |
X9 |
-15ºC~+150ºC |
Mainly applicable to the low pressure steam with high temperature, hot & cold water and heat pipes for disposable water treatment. |
| PTFE |
|
-18ºC~+200ºC |
Mainly applicable to strong acid, strong alkali and other corrosive medium. |
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