D341W ventilation butterfly valve supplier

D341W ventilation butterfly valve supplierfeature

1.Designed and manufactured using a new structural form of welding midline disc plates and short structural steel plates, it has a compact structure, light weight, easy installation, low flow resistance, high flow capacity, avoids the influence of high temperature expansion, and is easy to operate.

2.No connecting rods, bolts, etc. inside, reliable operation, long service life. Can be installed in multiple workstations without being affected by the flow direction of the medium

D341W ventilation butterfly valve supplierpurpose

Ventilation butterfly valve is a non sealed butterfly valve widely used in production processes such as building materials, metallurgy, mining, and power. It is used for connecting, opening, closing, or regulating the medium quality in pipelines with a medium temperature of 300 ℃ and a nominal pressure of 0.1Mpa.

working principle

The ventilation butterfly valve is divided into manual and electric transmission, which can be driven by an electric motor or turbine to drive the actuator, making the butterfly plate at 90 ° C; Free rotation within the range to achieve the purpose of opening and closing or adjusting the flow rate of the medium.

Key points for installation of ventilation butterfly valve

1.The installation position, height, and inlet/outlet direction must meet the design requirements, and the direction of medium flow should be consistent with the arrow direction marked on the valve body. The connection should be firm and tight.

2.Before installing the valve, a visual inspection must be conducted, and the valve nameplate should comply with the current standard "General Valve Marking" GB 12220. For valves with a working pressure greater than 1.0 MPa and a shut-off function on the main pipeline, 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 5 minutes. The valve shell and packing shall be qualified if there is no leakage. During the tightness test, the test pressure is 1.1 times the nominal pressure; The duration of the experiment meets the requirements of GB 50243.

Classification of ventilation butterfly valves

Ventilation butterfly valve driven by

(1) Electric butterfly valve

(2) Pneumatic butterfly valve

(3) Hydraulic butterfly valve

(4) Electro hydraulic butterfly valve

Ventilation butterfly valve according to structure

(1) Center sealed butterfly valve

(2) Single eccentric sealing butterfly valve

(3) Double eccentric sealing butterfly valve

(4) Triple eccentric sealing butterfly valve

Ventilation butterfly valve according to material

(1) Soft sealed butterfly valve

a.The sealing pair is composed of non-metallic soft materials.

b.The sealing pair is composed of metal hard materials and non-metal soft materials.

(2) Metal hard sealed butterfly valve. The sealing pair is composed of metal hard materials.

Ventilation butterfly valve in sealing form

(1) Forced sealing butterfly valve

a.Elastic sealed butterfly valve. The sealing pressure is generated by the compression of the valve seat by the valve plate when the valve is closed, and the elasticity of the valve seat or valve plate

b.External torque sealed butterfly valve. The sealing pressure is generated by the torque applied to the valve shaft externally

(2) Pressure sealed butterfly valve. The sealing pressure is generated by the pressurization of the elastic sealing element on the valve seat or valve plate

(3) Automatic sealing butterfly valve. The sealing pressure is automatically generated by the medium pressure.

Ventilation butterfly valve according to working pressure

(1) Vacuum butterfly valve. Butterfly valves with working pressure lower than the atmospheric pressure of the standard reactor.

(2) Low pressure butterfly valve. Butterfly valve with nominal pressure PN<1.6MPa.

(3) Medium pressure butterfly valve. Butterfly valves with nominal pressure PN ranging from 2.5 to 6.4 MPa.

(4) High pressure disc valve. The nominal pressure PN is 10. Butterfly valve with a pressure range of 0-80.0MPa.

(5) Ultra high pressure butterfly valve. Butterfly valves with nominal pressure PN>100MPa.

Ventilation butterfly valve according to working temperature

(1) High temperature butterfly valve. t> Butterfly valve at 450 ℃

(2) Medium temperature disc valve. Butterfly valve with 120 C<450 C

(3) Room temperature butterfly valve. A butterfly valve with a temperature range of 40C<120 C

(4) Low temperature butterfly valve. Butterfly valve with a temperature range of 100 ° C to 40 ° C

(5) Ultra low temperature butterfly valve. Butterfly valve with t<100 ° C

Ventilation butterfly valve according to connection method

(1) Clamp type butterfly valve

(2) Flange butterfly valve

(3) Ear type butterfly valve

(4) Welded butterfly valve

Characteristics of ventilation butterfly valve

Ventilation Butterfly ValveThe structure is welded using a centerline butterfly plate and a short structural steel plate, so there are no connecting rods or bolts inside, and there will be no component problems during use, resulting in a low failure rate. It is very convenient to use. It is a reliable valve device. And because its sealing system adopts metal sealing, although the sealing effect is not as good as elastic sealing, its service life is longer than elastic sealing, and it has the characteristic of high temperature resistance. So it has a wide range of applications in industries such as building materials, electricity, metallurgy, etc. In medium conveying pipelines with temperatures not exceeding 300 degrees, perfect connection and closure adjustment can be achieved. This butterfly valve can also be customized according to customer needs, which is very user-friendly.
becauseVentilation Butterfly ValveThe gap between the butterfly plate and the valve body is large, providing sufficient expansion space. Therefore, during use, it can effectively prevent thermal expansion and contraction caused by temperature changes, and avoid the phenomenon of butterfly plate jamming. There are various driving methods for common butterfly valves, including manual, electric, pneumatic, and so on, with a wide range of choices. Due to the material, this butterfly valve also has the characteristic of high temperature resistance, and there will be no friction when opening and closing, with an extremely long service life.Ventilation Butterfly ValveIt is a valve made by welding steel plates, which has the characteristics of small size, light weight, easy installation, and is not affected by high temperature expansion due to its low flow resistance and large flow capacity. Its driving torque is small and the switch is very flexible, so it is easy to operate. Deeply loved by professionals in the industry.