Butterfly valves are essential components in industrial applications, offering efficient flow control. Choosing the right type of butterfly valve depends on various factors. These factors or saying features include the desired driving mode, working pressure, working temperature and structural features. Firstly, Pneumatic actuator butterfly valve offer reliability and versatility, with the choice between wafer and flanged designs. Meanwhile, electric butterfly valve provide automated operation and precise control, making them suitable for a wide temperature range. In addition, Manual butterfly valves offer simplicity and cost-effectiveness, ideal for low-pressure applications. Consider your specific requirements and application needs to select the most suitable butterfly valve type for your industrial processes.
I. Pneumatic Actuator Butterfly Valve: Reliable and Versatile
Characteristic: Wafer or Flanged Butterfly Valve
- Pneumatic actuator butterfly valves can be either wafer or flanged in design.
- The choice between the two depends on the specific application and installation requirements.
Work Pressure: Mid-Pressure (2.5MPa < Pn < 6.4MPa)
Pneumatic actuator butterfly valves are designed to handle mid-pressure applications. So it provides reliable performance and efficient flow control.
II. Electric Butterfly Valve: Automated and Precise
Driving Mode: Electric
- Electric butterfly valves are powered by electric actuators.So, It enables automated operation and precise control over fluid flow.
- This driving mode eliminates the need for manual intervention. This isideal for applications requiring remote control or frequent adjustments.
Working Temperature: Normal Temperature (-40°C < T < 120°C)
Electric butterfly valves can operate within a wide temperature range, from -40°C to 120°C. Meanwhile, wide range of working temperature makes them suitable for both hot and cold applications.
Structure: Double-Eccentric Sealing
- Electric butterfly valves feature a double-eccentric sealing structure, which enhances sealing performance and reduces wear and tear on the valve seat.
- This design ensures tight shut-off and minimizes the risk of leakage.
III. Manual Butterfly Valve: Simple and Cost-Effective
Driving Mode: Manual
Manual butterfly valves are operated manually, either through a lever or a handwheel.
This driving mode offers simplicity and cost-effectiveness, making them suitable for applications where automation is not required.
Structure: Center Sealing
Manual butterfly valve typically feature a center sealing structure, providing reliable sealing performance and ease of operation.
Work Pressure: Low Pressure
Manual butterfly valves are designed for low-pressure applications, offering economical flow control solutions.
Stem Material: Stainless Steel
The stem of manual butterfly valves is commonly made of stainless steel, ensuring durability and resistance to corrosion.
Butterfly valve is a valve that uses a circular disc as a opening and closing part and rotates with the valve stem to open, close and adjust the fluid channel. The disc of the butterfly valve is installed in the diameter direction of the pipe. Earlier applications began with the air volume regulation baffle on the flue or chimney, and were also used in low-pressure systems such as ventilation or gas supply. In recent years, the metal seal butterfly valve has developed rapidly, with the application of high temperature resistance, low temperature resistance, strong corrosion resistance, strong erosion resistance, high strength alloy materials in the butterfly valve, so that the metal seal butterfly valve has been widely used in high temperature, low temperature, strong erosion and other working conditions, and partially replaced the globe valve, gate valve and ball valve.
There are many types of butterfly valves, among which the most common classification method is according to the structural form (the position of the rotating center line of the valve stem is different), which can be divided into the following four kinds:
In addition, there are many other ways to classify butterfly valves.
Butterfly valve drive mode classification
Pneumatic actuator butterfly valve
The pneumatic actuator butterfly valve is composed of a pneumatic actuator and a butterfly valve. The pneumatic butterfly valve is opened and closed with the circular butterfly plate rotating with the valve stem, and the pneumatic valve that has been switched is mainly used as a cut-off valve, which can be used as a switch and adjustment application. Now the butterfly valve is more and more applied in high pressure large and medium diameter pipelines.
Electric actuator butterfly valve
The electric butterfly valve is driven by an electric actuator, and the working power supply is usually: AC220V, AC380V, etc. Input signal: 4~20mA 0~10v and other weak signals. After the regulating electric actuator and valve stem are installed and adjusted, the butterfly valve plate is driven by electric energy as the driving force to make a partial reverse rotation movement of 0~90°. Receive the 4~20mA signal of the industrial automation control system to accurately control the valve switching degree, so as to achieve the adjustment and control of different demand parameters such as flow, temperature, pressure, etc.
Manual butterfly valve
Manual butterfly valve is a traditional, no mechanized improvement, the need for manual operation of the butterfly valve, although the degree of automation is low, but still plays a relatively large role in the industrial field.
Gate valves also come in many varieties
Like the butterfly valve, the gate valve as a switch valve, there are many classifications. For example:
According to the lifting mode of the stem, the gate valve can be divided into rising stem resilient seated gate valve and non rising stem resilient seated gate valve.
The stem of the non rising stem resilient seated gate valve only rotates and does not move up and down, and only one valve stem of non rising stem resilient seated gate valve is exposed. Its nut is fixed on the gate, through the rotation of the stem to lift the gate, so you can not see the door frame; The stem of the rising stem resilient seated gate valve is exposed, and the nut is fixed tightly to the handwheel (no rotation, no axial movement). By rotating the stem to lift the gate, the stem and gate only have relative rotation movement, there is no relative axial displacement, and the appearance is a portal bracket.
China high quality butterfly and gate vales here
TWT is a professional valve manufacturer in China, known for high quality and excellent service, all kinds of valves we have professional production lines to ensure to meet your needs. In this article, we briefly mentioned several commonly used butterfly valves and gate valves, which are also part of our main products. You are welcome to continue browsing our website for more information.