How much is the electric stainless steel ventilation butterfly valve

Stainless steel ventilation butterfly valveIt is a structurally simple regulating valve that can also be used for on/off control of low-pressure pipeline media.Ventilation Butterfly ValveIt is a non sealed butterfly valve.

Stainless steel ventilation butterfly valveUsed as a pipeline control device for regulating flow or cutting off gas media in dusty cold or hot air gas pipelines for ventilation and environmental protection projects in industries such as chemical, building materials, power stations, and glass. This type of valve should generally be installed horizontally in pipelines.

Main products: Large ventilation butterfly valve, electric ventilation butterfly valve, leakage rate of 0, explosion-proof ventilation butterfly valve.

structural characteristics

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

Purpose:

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

working principle

Ventilation Butterfly ValveDivided into manual and electric transmission, it can be driven by an electric motor or turbine to drive the actuator, allowing the disc plate to rotate freely within a 90 ° range to achieve the purpose of opening and closing or adjusting the medium flow rate

Installation points:

1.The installation position, height, and inlet/outlet direction must meet the design requirements. Attention should be paid to the direction of medium flow, which 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 national 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.

Stainless steel ventilation butterfly valveClassification:

Press Drive

(1) Electric butterfly valve

(2) Pneumatic butterfly valve

(3) Hydraulic butterfly valve

(4) Electro hydraulic butterfly valve

According to the structure

(1) Center sealed butterfly valve

(2) Single eccentric sealing butterfly valve

(3) Double eccentric sealing butterfly valve

(4) Triple eccentric sealing butterfly valve

By 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.

According to the 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.

According to work 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.

According to working temperature

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

(2) Medium temperature disc valve. 120 C

(3) Room temperature butterfly valve. 40C

(4) Low temperature butterfly valve. One hundred

(5) Ultra low temperature butterfly valve. T<100 c=''>

According to the connection method

(1) Clamp type butterfly valve

(2) Flange butterfly valve

(3) Ear type butterfly valve

(4) Welded butterfly valve

5 Characteristics

1. Easy and quick opening and closing, labor-saving, low fluid resistance, and can be operated frequently.

2. Simple structure, small size, and light weight.

3. It can transport mud and minimize the accumulation of liquid at the pipeline outlet.

4. Under low pressure, good sealing can be achieved.

5. Good regulation performance.

6 Standards and Parameters

standard

1. Design standard: GB/T12238-1989 JB/T8692-1998

2. Flange connection size: GB/T9115.1-2000

3. Structural length h: GB/T12221-1989

4. Pressure test: GB/T13927-1992; JB/T9092-1999

parameter

Nominal diameter DN (mm) 50-2000

Nominal pressure PN (Mpa) 0.05 0.25 0.6

Test pressure strength test 0.075 0.375 0.9

Sealing test ≤ 1.5% leakage rate

Applicable media include coal gas, dusty gas, flue gas, etc

Suitable for temperatures below -10 degrees Celsius and above 250 degrees Celsius

7 main components

8 External dimensions

9 Installation Instructions

1. Before installation, it is necessary to carefully check whether the valve markings and certificates meet the usage requirements, and after verification, cleaning treatment should be carried out. Uninstalled and unused valves should be stored indoors in a dry place. Valves that have been stored for a long time should be regularly cleaned, dried, and coated with rust proof oil. Blind plates should be used at both ends of the valve to protect the flange sealing surface.

2. Install according to the direction of medium flow; Prioritize horizontal installation.

3. The connecting bolts between the ventilation butterfly valve and the pipeline should be tightened multiple times in the opposite diagonal direction during installation, and should not be tightened individually to prevent leakage at the flange connection due to uneven stress.

4. When installing the ventilation butterfly valve, it is advisable to keep the butterfly plate in the closed position to prevent debris from entering the valve chamber and rubbing the sealing surface. When the user wants to test the pressure, the two ends should be clamped with flanges before testing.

5. When connecting valves to pipelines, it is required to use butt welded steel flanges or ventilation butterfly valve flanges on the pipelines. If a flat welded steel flange is used, it must be required that the inner hole of the flange is the same size as the inner hole of the gasket to ensure the effective sealing surface of the gasket.

6. The opening and closing stroke of the control mechanism of the ventilation butterfly valve has been adjusted before leaving the factory. To prevent the direction from being wrong when the power is turned on, users need to manually close 1/3 of the opening position before * times turning on the power. And check whether the direction of the indicator wheel and the direction of valve opening are *.

7. If any malfunction is found during the use of the valve, it should be stopped immediately.

10 Lightweight ventilation butterfly valve

The manual ventilation butterfly valve is made of the same material as the valve body and processed into a sealing ring. Its applicable temperature depends on the material of the valve body, and the nominal pressure is ≤ 0.6MP. It is generally used for regulating the flow rate of ventilation media in industrial, metallurgical, environmental protection and other pipelines.

Its main characteristics are:
1. The design is innovative, reasonable, structurally sound, lightweight, and can be opened and closed quickly.
2. Small torque, easy operation, effortless and agile.
3. Adopt suitable materials to meet different medium temperatures such as low, medium, and high, as well as corrosive media