Our goal: to be a high-quality manufacturer of industrial control valves, gaining unanimous recognition from new and old customers
Our mission: To fully utilize the effectiveness of industrial control valves to achieve better results
Common faults
Rubber elastomers in butterfly valves can tear, wear, age, perforate, or even fall off during continuous use. However, the traditional thermal vulcanization process is difficult to adapt to the needs of on-site repair, which requires the use of specialized equipment, consuming a large amount of thermal and electrical energy, time-consuming and laborious. Nowadays, the method of replacing traditional methods with polymer composite materials is gradually adopted, and the technology system of Fossil Blue is widely used. The superior adhesion and excellent wear and tear resistance of its products ensure that the service life of new components can be reached or even exceeded after repair, greatly reducing downtime.
Installation and maintenance
1. During installation, the valve disc should be stopped in the closed position.
2. The opening position should be determined according to the rotation angle of the butterfly plate.
3. For butterfly valves with bypass valves, the bypass valve should be opened before opening.
4. The installation shall be carried out according to the installation instructions of the manufacturer. For heavy butterfly valves, a solid foundation shall be provided.
Key points of construction and installation
1. The installation position, height, inlet and outlet directions must meet the design requirements, and the connection should be firm and tight. 2) The handle of various manual valves installed on insulated pipes shall not be downward.
2. Visual inspection must be conducted before valve installation. The nameplate of the valve should comply with the current national standard "General Purpose Valve Signs" GB 12220. For valves with a working pressure greater than 1.0 MPa and having a cutoff effect on the main pipe, strength and tightness tests should be conducted before installation, and they can only be used after passing the tests. During the strength test, the test pressure shall be 1.5 times the nominal pressure, and the duration shall not be less than 5min. The valve shell and filler shall be free of leakage, which is considered qualified. During the tightness test, the test pressure shall be 1.1 times the nominal pressure; The test pressure during the duration of the test shall comply with the requirements of GB 50243 standard, and the valve flap sealing surface shall be qualified if there is no leakage.
Key points of product selection
1. The main control parameters of butterfly valves are specifications and dimensions.
2. The butterfly valve is a single plate type air valve with simple structure, convenient processing, low cost, and easy operation, but its adjustment accuracy is poor, and it is only suitable for switching or rough adjustment in ventilation and air conditioning systems.
3. It can be operated manually, electrically, or zippered, and can be fixed at any angle within a 90 ° range.
4. Due to the limited bearing capacity of a single shaft and single valve plate, the valve has a short service life under conditions of large pressure difference and high flow rate. The valve can be divided into closed type and ordinary type, and thermal insulation and non thermal insulation.
5. The electric butterfly valve has only dual position control, and the electric actuator is the same as the multi leaf valve.
Installation considerations
The butterfly valve has a simple structure, small size, light weight, and relatively few components. Only a few key components can constitute the butterfly valve, which is also very convenient to open. You only need to select the switch to 90 degrees. The butterfly valve has excellent fluid control, allowing you to increase or decrease the flow at any time. The valve has certain resistance when transporting any fluid, and the resistance of the butterfly valve mainly comes from itself, For example, if you want to reduce the resistance to fluid, you only need to reduce the thickness of the butterfly valve body.
Elastic seals have the defect of being limited by temperature.
Butterfly valves also have a wide range of applications, and if used to control flow, it is necessary to choose different types and valve body sizes, as butterfly valves are inherently suitable for valves with larger diameters when designed. Butterfly valves are not only widely used in general industries such as petroleum, gas, chemicals, and water treatment, but also in cooling water systems in thermal power plants.
