What is the role of flange x grooved end resilient wedge OS and Y gate valves in fire protection systems? What are its sealing materials?
Flange x grooved end resilient wedge OS and Y gate valves play a vital role in fire protection systems by controlling the flow of water within the pipe network. Here are some key aspects of their role:
1. Flow Control: These valves are used to regulate the flow of water in fire protection systems. They can be strategically placed to isolate sections of pipes, allowing firefighters to direct water to where it is needed most during an emergency.
2. Emergency shutdown: In the event of a fire, these valves can quickly close to prevent water from flowing to a specific area. This helps prevent water waste and improves firefighting efficiency.
3. Versatile installation: The combination of flange end and grooved end provides installation flexibility. The flange allows for traditional bolting, while the grooved end allows for quick and easy installation using grooved couplings.
4. Elastic wedge design: The elastic wedge design enhances the sealing ability of the valve. Flexible wedges, often made from materials such as rubber or EPDM, ensure a tight seal even if debris or sediment is present in the pipe.
5. OS & Y Features: External screw and yoke design provides visible indication of valve position. This allows operators to easily confirm whether a valve is open or closed, aiding maintenance and emergency response.
As for the sealing material, the elastic wedge is a key component in forming a tight seal and is usually made of elastomeric material. Common materials include rubber or EPDM (ethylene propylene diene monomer). These materials were chosen for their flexibility, durability and ability to withstand water and environmental factors.
It is important to note that the specific materials used may vary from manufacturer to manufacturer, and material selection may be influenced by factors such as the intended application, compatibility with the fluid being transported, and compliance with industry standards. If you have a specific valve model, referring to the manufacturer's documentation or contacting them directly will provide accurate information on the sealing materials used for that specific valve.
| Size |
DN |
|
D |
F |
D2 |
E |
G |
H |
| 2 1/2" |
65 |
190 |
178 |
15.9 |
73 |
69.1 |
7.9 |
370 |
| 76.1 |
72.3 |
| 3" |
80 |
203 |
191 |
15.9 |
88.9 |
84.9 |
7.9 |
420 |
| 4" |
100 |
229 |
229 |
15.9 |
114.3 |
110.1 |
9.5 |
447 |
| 5" |
125 |
254 |
254 |
15.9 |
139.7 |
135.5 |
9.5 |
547 |
| 141.3 |
137 |
| 6" |
150 |
267 |
279 |
15.9 |
165.1 |
160.8 |
9.5 |
607 |
| 168.3 |
163.9 |
| 8" |
200 |
292 |
343 |
19 |
216.3 |
211.6 |
11.1 |
754 |
| 219.1 |
214.3 |
| 10" |
250 |
330 |
406 |
19 |
273 |
268.3 |
12.7 |
890 |
| 12" |
300 |
356 |
483 |
19 |
323.9 |
318.3 |
12.7 |
1031 |
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| MATERIAL SPECIFICATION |
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| NO. |
Name |
Material |
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| 1 |
Gasket |
Stainless Steel 304 or C95400 |
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| 2 |
Bonnet |
Ductile Iron |
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| 3 |
Packing |
Graphite |
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| 4 |
Disc |
Ductile Iron +EPDM |
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| 5 |
Body |
Ductile Iron |
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| 6 |
Sealing Ring |
EPDM |
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| 7 |
Bolt |
Stainless Steel 304 or Steel 1045 |
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| 8 |
Gland |
Ductile Iron |
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| 9 |
Nut |
Stainless Steel 304 or Steel 1045 |
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| 10 |
Flat Washer |
Stainless Steel 304 or Steel 1045 |
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| 11 |
Bolt |
Stainless Steel 304 or Steel 1045 |
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| 12 |
Handwheel |
Ductile Iron |
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| 13 |
Lock Nut |
C95400 |
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| 14 |
Locating Screw |
Stainless Steel 304 or Steel 1045 |
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| 15 |
Stem |
Stainless Steel 304 or C95400 |
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| 16 |
Stem Nut |
C95400 |
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| 17 |
Plug |
C95400 |
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| 18 |
Lifting Nut |
CF8 or C95400 |
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| 19 |
Pin |
Stainless Steel 304 |
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| 20 |
Sealing Ring |
EPDM |
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