FLOATING BALL VALVE
Expert Flow Control specializes in manufacturing floating ball valve. It is a type of valve that controls the flow of liquids or gases through pipelines. It’s the most common type of valve in the piping industry.
Floating ball valves are the most common type of valve used in industrial piping systems. These valves are designed so that as the seats begin to wear the pressure from the media flowing through the valve will force the ball against the downstream seat to maintain a tight seal.
Floating ball valves are supported by cupped seats that create a tight seal between the valve body and the ball. The ball itself is suspended in the media it regulates and is kept in position by cup-like seats, usually made of a thermoplastic. These seats form a tight seal between the ball and the valve body.
Material Used for construction for Ball Valve
| PARTS | MATERIAL USED |
|---|---|
|
Body & Tail Piece |
WCB, WCC, LCB, LCC, CF8, CF8M, CF3, CF3M, CD4MCu, CN7M, CD3MN, CN3MN, CW6M & N7M, and other alloys. |
|
Ball |
WCB, with WNP, LCB with ENP, CA15,CF8, CF8M, CF3M, CD4MCU, CN7M, CD3MN, CN3MN, CW6M, N7M, and other alloys |
|
Stem & Gland |
410, 304, 316, A20, 31803, Inconel &other alloys |
|
Seat |
TFM, PTFE, RPTFE, Nylon, Derlin, PEEK, Devlon, Metal |
|
Stem Washer |
RPTFE |
|
Stem Seal |
Grafoil, PTFE |
|
Body Seal |
Grafoil, Spiral wound with Grafoil filler |
|
Body Stud |
B7, L7, B8, B8M |
|
Body Nut |
2H, 2HM, 8, 8M |
Maximum Allowable Leakage Rates as per API 598
| VALVE SIZE | RESILIENT SEATED VALVES | LIQUID TEST | GAS TEST* |
|---|---|---|---|
|
≤ 2 |
0 |
0 |
0 |
|
2 ½ – 6 |
0 |
12 |
24 |
|
8 – 12 |
0 |
20 |
40 |
|
≥ 14 |
0 |
28 |
56 |
Maximum Allowable Leakage Rates as per BS EN 12266 AND ISO 5208
| TEST FLUID | UNIT LEAKAGE RATES | RATE A | RATE B | RATE C | RATE D | RATE E | RATE F | RATE G |
|---|---|---|---|---|---|---|---|---|
|
LIQUID |
mm^3/s |
0 |
0.01 X DN |
0.03 X DN |
0.1 X DN |
0.3 X DN |
1 X DN |
2 X DN |
|
GAS* |
mm^3/s |
0 |
0.3 X DN |
3 X DN |
30 X DN |
300 X DN |
3000 X DN |
6000 X DN |
*Gas closure test at 6bar
- Designed & Manufactured to ASME B16.10
- Single Piece, Two Piece & Three Piece design body.
- Blow Out Proof Stem.
- Anti-Static feature.
- Fire Safe Design.
- Lever / Gear / Actuator Operated.
We also provide the following optional features to meet client’s requirement:
- Stem Extension
- Metal Seated Ball Valves for High Temperature application.
- Different metallurgy to suit different applications.
- Cryogenic Ball Valves
- Special Seat Material PEEK for high temperature applications.
- Process Industries viz Chemicals, Dyes & Intermediates, & Specialty Chemicals.
- Pharmaceutical Industries.
- Hydrocarbon Industries.
- Food Processing Industries.
- Steel & Minerals, Mining Industries.
- Paper & Pulp Industries.
Textile Industries.
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