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What is the meaning of butterfly valve model specifications? What are the types of butterfly valves?
Release time:2022-06-23   Browse:735 Return

Butterfly valve, also known as flap valve, is a kind of regulating valve with simple structure. The meaning of butterfly valve model is the code of the type, connection and structure, transmission method and valve body material. Specifically, take D37A1X5-16ZB1 as an example to tell you how to look at the model of the butterfly valve. In addition, there are many types of butterfly valves, which can be classified according to structure, sealing surface material, sealing form, working pressure, working temperature and connection method. Next, I will introduce in detail what the butterfly valve model specifications mean and the types of butterfly valves. Let's take a look at the relevant knowledge!

1. What is the meaning of butterfly valve model specifications?

The meaning of the butterfly valve model specification is arranged and specified by the code of the type, the connection and structural form, the transmission method and the valve body material, such as: D37A1X5-16ZB1.

1. D: butterfly valve (the first letter of die pinyin)

2, 3: Turbine transmission (this supplement: there are 6 for pneumatic, 7 for hydraulic, 9 for electric)

3, 7: Wafer connection (this supplement: there are 4 for flange, 6 for welding)

4. A1: A-type midline form (another addition: there are 2 for double eccentricity, 3 for triple eccentricity, and LT type corresponding to A type)

5. X5: nitrile rubber seal (this supplement: X3 represents ethylene propylene rubber, and F represents PTFE)

6, 16: Pressure resistance 16 kg (this supplement: 6, 10, 25 kg pressure, etc.)

7. Z: Butterfly valve body material gray cast iron (this supplement: Q stands for ductile iron, C stands for cast steel, and P stands for stainless steel)

8. B1: valve plate material 304 stainless steel

2. What are the types of butterfly valves

1. Classification by structure

(1) Sealed butterfly valve

(2) Single eccentric sealing butterfly valve

(3) Double eccentric sealing butterfly valve

(4) Triple eccentric sealing butterfly valve

2. Classification by sealing surface material

(1) Soft sealing butterfly valve, the sealing pair is composed of non-metallic soft material to non-metallic soft material

(2) Metal hard sealing butterfly valve, the sealing pair is composed of metal hard material to metal hard material

3. Classification by sealing form

(1) Forced sealing butterfly valve, the specific pressure of sealing is generated by the valve plate pressing the valve seat when the valve is closed, and the elasticity of the valve seat or valve plate

(2) Additional torque sealing butterfly valve. The seal specific pressure is generated by the torque applied to the valve shaft

(3) Pressurized sealing butterfly valve. The sealing specific pressure is generated by the charging of the elastic sealing element on the valve seat or valve plate

(4) Automatic sealing butterfly valve, the sealing specific pressure is automatically generated by the medium pressure

4. Classification by work pressure

(1) Vacuum butterfly valve, butterfly valve whose working pressure is lower than standard reactor atmospheric calendar

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

(3) Medium pressure butterfly valve, butterfly valve with nominal pressure PN of 2.5--6.4MPa

(4) High-pressure butterfly valve, the nominal pressure PN is 10.0--80.0MPa butterfly valve

(5) Ultra-high pressure butterfly valve, butterfly valve with nominal pressure PN>100MPa

5. Classification by working temperature

(1) High temperature butterfly valve, butterfly valve with t>450C

(2) Medium temperature butterfly valve, butterfly valve with 120C<t<450C

(3) Normal temperature butterfly valve, a butterfly valve of 40C<t<120C

(4) Low temperature butterfly valve, a 100 < t < a 40C butterfly valve

(5) Ultra-low temperature butterfly valve, t<-100C butterfly valve

6. Classification by connection method

(1) Wafer type butterfly valve

(2) Flanged butterfly valve

(3) Lug butterfly valve

(4) Welded butterfly valve

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