Sanitary Valve Classification By Purpose And Function

Sanitary Valve—mainly used to shut off or connect media flow. These include gate valves, stop valves, diaphragm valves, ball valves, plug valves, butterfly valves, plunger valves, ball plug valves, and needle-type instrument valves.

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Regulating valves—mainly used to regulate the flow and pressure of media. These include regulating valves, throttling valves, and pressure reducing valves.
Check valves—used to prevent backflow of media. These include check valves of various structures.
Diverter valves—used to separate, distribute, or mix media. These include distribution valves and steam traps of various structures.
Safety valves—used to provide safety protection against overpressure. These include various types of safety valves.
Classification by pressure
Vacuum valves—valves with operating pressures below standard atmospheric pressure.
Low-pressure valves—valves with nominal pressures PN < 0.
Medium-pressure valves—valves with nominal pressures PN ~ 0.
High-pressure valves—valves with nominal pressures PN ~ 0.
Ultra-high-pressure valves—valves with a nominal pressure (PN) greater than 100 MPa.

Classification by medium temperature

High-temperature valves—valves with a t greater than 450°C.

Medium-temperature valves—valves with a t between 120°C and 450°C.

Normal-temperature valves—valves with a t between -40°C and 120°C.

Low-temperature valves—valves with a t between -100°C and -40°C.

Ultra-low-temperature valves—valves with a t less than -100°C.

Classification by valve body material

Non-metallic valves—such as ceramic valves, fiberglass valves, and plastic valves.

Metallic valves—such as copper alloy valves, aluminum alloy valves, lead alloy valves, titanium alloy valves, monel valves,

Cast iron valves, carbon steel valves, cast steel valves, low-alloy steel valves, and high-alloy steel valves. 2
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Metal-Bodied Lined Valves—such as lead-lined valves, plastic-lined valves, and enamel-lined valves.
General Classification
This classification method is based on principle, function, and structure, and is currently the most commonly used classification method both internationally and domestically. It is generally divided into:
Gate valves, globe valves, throttle valves, instrument valves, plunger valves, diaphragm valves, plug valves, ball valves, butterfly valves, check valves, pressure reducing valves
Safety valves, steam traps, regulating valves, foot valves, filters, and drain valves.