Types and Models of Butterfly Valves

With the advancement of science and technology, the production process of butterfly valves has become more and more sophisticated, and different types have been extended from this, and their uses have become more and more extensive. What are the types of butterfly valves? What is the corresponding model? This article will take you to understand the types and models of butterfly valves.

Types of Butterfly Valves
There are many classifications of butterfly valves, and different classification forms can divide butterfly valves into different types. Let’s talk about it specifically.
1. According to the different connection forms, it can be divided into wafer butterfly valve, flanged butterfly valve, welded butterfly valve, threaded butterfly valve, clamp butterfly valve and so on. The most commonly used connection forms are wafer butterfly valve and flanged butterfly valve.
2. According to the different transmission modes, it can be divided into handle butterfly valve, turbine butterfly valve, pneumatic butterfly valve, electric butterfly valve, hydraulic butterfly valve, solenoid valve, etc. The most common transmission methods are handle, turbine, pneumatic and electric. The handle butterfly valve and turbine butterfly valve are collectively referred to as manual butterfly valve.
3. According to the material of the sealing surface, it can be divided into soft sealing butterfly valve and hard sealing butterfly valve. The sealing performance of the soft-seal butterfly valve is better than that of the hard-seal butterfly valve. The commonly used materials for the sealing surface of the soft-seal butterfly valve are EPDM, nitrile rubber and PTFE. Hard-sealed butterfly valves are mainly used in high temperature and high pressure conditions.
4. According to different structural forms, it can be divided into centerline butterfly valve, single eccentric butterfly valve, double eccentric butterfly valve and triple eccentric butterfly valve. Among them, the midline butterfly valve generally uses a soft seal; the eccentric butterfly valve uses a hard seal. The triple eccentric butterfly valve is the valve with the best performance at present. It not only has the excellent sealing performance of the soft sealing butterfly valve, but also has the characteristics of high temperature and high pressure resistance and corrosion resistance of the hard sealing butterfly valve.
5. According to the different working pressure, it can be divided into vacuum butterfly valve (nominal pressure lower than standard atmospheric pressure), low pressure butterfly valve (nominal pressure PN<1.6MPa), medium pressure butterfly valve (nominal pressure PN2.5-6.4MPa), high pressure butterfly valve (nominal pressure PN2.5-6.4MPa) Nominal pressure PN10.0-80.0MPa), ultra-high pressure butterfly valve (nominal pressure PN>100MPa). A high-quality butterfly valve manufacturer, Tanghai Valve mainly produces low-pressure butterfly valves and medium-pressure butterfly valves.
The above is an introduction to the types of butterfly valves. For the description of butterfly valve models, you can refer to the article “Method of Representing Butterfly Valve Models”. The code name of the butterfly valve is D. The commonly used butterfly valve models include D71X, D371X, D671X, D971X for the wafer type of the soft-sealed butterfly valve, and D41X, D341X, D641X, and D941X for the flange type. Among them, X represents the rubber material. Pipes with corrosive media can be replaced with F fluoroplastics. For hard sealing, you only need to change X or F, that is, the material of the sealing surface, to H, that is, the metal material.

The types and models of butterfly valves are introduced here. For more butterfly valve information, you are welcome to visit the official website of Tanghai Valve.

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

Video of center-lined butterfly valve: https://youtu.be/NuSZH_AJcwY
Video of double eccentric butterfly valve: https://youtu.be/yOw2xp3bIaE
Video of triple eccentric butterfly valve: https://youtu.be/AkRwg2X1Wh0
Video of PTFE butterfly valve: https://youtu.be/Lutith_TJD0

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