The weight of a butterfly valve is critical to the overall design of a system. It affects installation, maintenance, and overall system efficiency. Known for its compact design and efficient flow control, butterfly valves are essential in a variety of applications from water treatment to oil and gas.
1. Overview of Butterfly Valve Weight.
The weight of a butterfly valve is based on the sum of all weights. The weight of a butterfly valve varies depending on the structure and configuration of the butterfly valve.
1.1 Basic Structure
A butterfly valve consists of a valve body, a disc, a stem, a seat, and an actuator. The valve body is the main body, responsible for connecting the pipe flange, forming a closed loop, and housing other components. The disc rotates around the central axis, and this rotation allows the valve to open or close, thereby controlling the flow of fluids or gases. The valve stem connects the disc to the actuator, which can be operated manually or automatically. The seat ensures a tight shutoff to prevent leakage.
Importance of Valve Weight
-Bearing Considerations
Valve weight plays a critical role in system design. The bearing capacity of the supporting structure must be considered during design. Heavy valves may require additional support, which increases the complexity of installation.
-Installation and Maintenance
Lighter valves generally simplify installation and reduce labor costs. They require less handling and support, making maintenance more accessible and serviceable. This ease of maintenance can reduce downtime and lower operating costs.
-Efficiency Impact
Lighter valves can provide faster response times. Structural design choices can optimize performance, ensuring the valve meets specific operating requirements. For example, butterfly valves are typically lighter than traditional gate valves, so butterfly valves can improve the efficiency of fluid control systems.
-Cost Considerations
The weight of a valve affects its cost in a number of ways. Heavier valves may incur higher shipping and handling expenses. Additionally, the materials used in manufacturing can affect the overall price. Selecting the right valve weight can save significant costs, both in terms of initial purchase and long-term maintenance.
2. Butterfly Valve Weight Chart
|
DN |
INCH |
Weight kg |
Weight kg |
|||||
|
Wafer type |
LUG type |
Flange type |
handel |
Gearbox |
||||
|
DN50 |
2” |
2.6 |
3.8 |
8.9 |
0.4 |
4.2 |
||
|
DN65 |
2-1/2” |
3.4 |
4.7 |
11.9 |
0.4 |
4.2 |
||
|
DN80 |
3” |
4.0 |
5.2 |
13.1 |
0.4 |
4.2 |
||
|
DN100 |
4” |
4.6 |
7.9 |
15.5 |
0.4 |
4.2 |
||
|
DN125 |
5” |
7.0 |
9.5 |
19.9 |
0.7 |
4.2 |
||
|
DN150 |
6” |
8.0 |
12.2 |
22.8 |
0.7 |
4.2 |
||
|
DN200 |
8” |
14.0 |
19.0 |
37.8 |
- |
10.8 |
||
|
DN250 |
10” |
21.5 |
28.8 |
55.8 |
- |
10.8 |
||
|
DN300 |
12” |
30.7 |
49.9 |
68.6 |
- |
14.2 |
||
|
DN350 |
14” |
44.5 |
63.0 |
93.3 |
- |
14.2 |
||
|
DN400 |
16” |
62.0 |
105 |
121 |
- |
25 |
||
|
DN450 |
18” |
95 |
117 |
131 |
- |
25 |
||
|
DN500 |
20” |
120 |
146 |
159 |
- |
25 |
||
|
DN600 |
24” |
170 |
245 |
218 |
- |
76 |
||
|
DN700 |
28” |
284 |
- |
331 |
- |
76 |
||
|
DN800 |
32” |
368 |
- |
604 |
- |
76 |
||
|
DN900 |
36” |
713 |
- |
671 |
- |
88 |
||
|
DN1000 |
40” |
864 |
- |
773 |
- |
88 |
||
Classification by Type
The type of butterfly valve affects its weight and suitability for the application. The butterfly valve weight table classifies the valve into three main types, each with different features and uses.
Wafer Type
Wafer butterfly valves fit tightly between flanges and require only four bolts, taking up less space. This design minimizes weight, making wafer valves ideal for applications where space and weight restrictions are critical.
Lug Type
Lug butterfly valves feature threaded inserts that can be installed using bolts, without nuts. This design provides increased stability and ease of maintenance, especially in systems that require frequent disassembly. The weight of lug butterfly valves depends on factors such as material composition and size, which also affect their cost and performance.
Flanged Type
Flanged butterfly valves provide a safe and secure connection to piping systems. Their design includes flanges that are bolted directly to the pipe, which enhances stability and leak resistance. Although flanged valves tend to be heavier, their durability and strength make them suitable for high-pressure applications.
Summary
Understanding the weight of butterfly valves is critical to optimizing system design and performance. Valve weight can affect installation, maintenance, and overall efficiency. By considering valve weight, engineers can make informed decisions that balance performance, durability, and cost. This ensures that the selected valve meets specific application requirements.
“Proper valve selection involves examining the application requirements from the perspective of valve size, system design, material properties, installation and maintenance needs, cost implications and regulatory compliance.”