Wafer Butterfly valves
Butterfly valve.
Butterfly valve is a reliable shut-off valve, which is used when equipping pipelines. Its functional purpose is to overlap and regulate the flow rate of the medium inside the pipe.
The shutter is a housing inside which there is a disk on the axis. An important component of the design is the handle or drive, which drives the disc and changes the angle of inclination of the part. This manipulation makes it possible to regulate the throughput of the pipeline.
These shutters have several varieties, their choice and the effectiveness of further use depends on the scope of operation, the design features of the device, the volume and type of media passing through the pipeline.
Butterfly valves have found their application in various fields: residential construction, public and industrial spheres.
Reliable pipeline fittings of this type are installed for pipeline systems used:
- On production lines in various industries;
- In the petrochemical industry;
- In the field of housing and communal services: heat, water supply;
- For fire extinguishing purposes;
- For ventilation and air conditioning systems.
Disc valves show the greatest efficiency of application when used with pure non-viscous media such as water, alcohol- and ether-containing compounds, air and natural gas, petroleum products.
According to the type of installation or the method of connection to the pipeline, there are flanged valves, flanged analogues, with 2 or 3 eccentricity.
Fittings are also distinguished by the shape of the locking element, configuration and type of material from which the housing is made.
The main classification of rotary Butterfly valve is carried out according to the type of control:
- The handle is the mechanized and easiest way to control the valve;
- Gearbox;
- Butterfly valve with electric actuator;
- Butterfly valve with pneumatic actuator.
Valves with electric and pneumatic drives are replacing mechanized analogues of locking devices. This is due to the need to automate management as much as possible and create the possibility of remote monitoring, reduce the risk of emergencies associated with pipeline system malfunctions.
The main feature of the locking device is to ensure 100% tightness in both directions. This indicator is achieved through the use of reliable seals. The material for a particular model is selected depending on the working environment, in any case, wear-resistant elastomers are used.
Types of materials for wafer butterfly valves body
Rotary disc valves have a number of characteristic advantages that allow you to stabilize the operation and increase the safety of operation of pipeline systems:
- Pipe fittings can be used at medium temperatures from -104 F to +392 F
- Compact dimensions;
- The number of triggers on average is up to 5000;
- Ease of construction, installation and maintenance;
- There is no stagnation zone in the flow part, which means there is no need to periodically clean dirt and mechanical particles that interfere with patency;
- Compatible with pipes of all diameters;
- The ability to replace the seals without completely dismantling the body of the locking device.
The low cost of the shut-off device, operational features and advantages make rotary disc valves the most common type of fittings for pipeline systems worldwide.