The three-piece flanged ball valve is an industrial valve that uses a three-piece flange structure, consisting of a central valve body and two side valve covers bolted together. The valve stem drives the ball to rotate 90° to achieve opening and closing. Its nominal pressure ranges from 1.6 to 6.4 MPa and meets the ASME 150LB standard. It is suitable for media such as water, oil, gas, and corrosive liquids, and is widely used in industrial pipeline systems in petrochemical, power, and other industries.
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Three Piece Flanged Ball Valve Technical parameters
Nominal pressure: 1.6-6.4MPa
Applicable stable range: -20～232℃～350℃
Applicable media: water, oil, gas, and certain corrosive liquids (W.O.G.)
Butt welding standard (BW): GB12224, ANSI B16.25
Main connection dimensions and weight of three-piece flange ball valve
|
SIZE |
1/2" |
3/4" |
1" |
1-1/4" |
1-1/2" |
2" |
2-1/2" |
3" |
4" |
|
d |
15 |
20 |
25 |
32 |
38 |
50 |
65 |
76 |
100 |
|
L |
130 |
150 |
160 |
180 |
200 |
230 |
290 |
310 |
350 |
|
D |
95 |
105 |
115 |
135 |
145 |
160 |
180 |
195 |
230 |
|
D1 |
65 |
75 |
85 |
100 |
110 |
125 |
145 |
160 |
190 |
|
D2 |
45 |
55 |
65 |
78 |
85 |
100 |
120 |
135 |
160 |
|
b |
14 |
16 |
16 |
18 |
18 |
20 |
22 |
24 |
24 |
|
f |
2 |
2 |
2 |
3 |
3 |
3 |
3 |
3 |
3 |
|
H |
75 |
95 |
90 |
110 |
130 |
140 |
170 |
180 |
250 |
|
w |
130 |
140 |
140 |
170 |
200 |
220 |
350 |
350 |
550 |
|
n-do |
4-14 |
4-14 |
4-14 |
4-18 |
4-18 |
8-18 |
8-18 |
8-18 |
8-22 |
Three Piece Flanged Ball Valve features
1. Gear-type double piston, high output torque, compact size.
2. Cylinder made of aluminum alloy, lightweight and aesthetically pleasing.
3. Manual operating mechanism can be installed at the top or bottom.
4. Rack and pinion connection allows for adjustment of opening angle and rated flow.
5. Actuator optional with electrical signal feedback indication and various accessories for automated operation.
6. ISO5211 standard connection facilitates product installation and replacement.
7. Adjustable screws at both ends allow for ±4° adjustment range between 0° and 90° for standard products, ensuring synchronization accuracy with the valve.
Three Piece Flanged Ball Valve Working Principle
The working principle of a three-piece flanged ball valve is based on the sealing fit between the ball and the valve seat, and the rotational movement of the ball within the valve body. Specifically, when the handle or actuator drives the ball to rotate 90 degrees, the through-hole of the ball aligns with or offsets the inlet and outlet channels of the valve, thereby opening or closing the fluid.
Closed State: The through-hole on the ball is offset from the inlet and outlet channels of the valve, forming a sealing barrier. At this time, the ball and the valve seat are tightly fitted by sealing materials (such as PTFE, metal seals, etc.), ensuring that the fluid cannot leak.
Open State: The through-hole on the ball aligns with the inlet and outlet channels of the valve, allowing the fluid to pass smoothly. At this time, the valve resistance is low, and the fluid flow efficiency is high.
Three Piece Flanged Ball Valve Advantages
- Low Fluid Resistance: The resistance coefficient of the three-piece flanged ball valve is equal to that of a pipe section of the same length, therefore, the resistance when the fluid passes through is low, which can improve the fluid flow efficiency.
- Simple Structure: This valve is small in size, lightweight, and has a simple structure, making it easy to install and maintain.
- Reliable Sealing: The valve body and seat have a tight seal, and various sealing materials are available to adapt to different media and operating conditions.
- Easy Operation: The valve is easy to operate; a simple 90-degree rotation is sufficient to fully open or close it, facilitating remote control.
- Easy Maintenance: Due to its simple structure and generally movable sealing rings, disassembly and replacement are relatively convenient.
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