Sanitary Valve structural form and operating specifications

The structural forms of sanitary valves are varied, and different structures have different characteristics and advantages. You should choose carefully before purchasing sanitary valves. For example, the structural form of butterfly valves is to adjust the flow rate in the pipeline system, the structural form of check valves is to prevent the backflow of materials, and the structural form of three-way ball valves is to adjust the flow direction of the medium.

Structural form of non-metallic sealing pair of sanitary valve forced seal butterfly valve

Serial number

1

2

3

Structural features

The composite rubber seat valve seat is installed in the groove of the inner wall of the valve body, fixed with a pressure plate bolt and a rubber ring, with good rebound performance and reliable sealing

Bar-type rubber valve seat. The inner cavity of the valve body is vulcanized with a layer of rubber lining or wrapped with a layer of rubber lining, which has two types: flat and convex. The convex shape is shown in the figure, and its inner diameter is smaller than the outer diameter of the butterfly plate

Bar-type composite valve seat, the outer layer is PVDF (polyvinylidene fluoride) and the inner layer is a rubber liner. Butterfly plate is made of PTFE

Sanitary valve

Application range

General medium cut-off and regulation

Working pressure is less than 1.0MPa General medium cut-off and regulation

Working pressure is equal to 0.7MPa Corrosive medium cut-off and regulation

Sanitary valve

Serial number

4

5

6

Structural features

Bar-type composite valve seat. The outer layer is PTFE, the second layer is synthetic rubber, and the inner layer is phenol resin

Composite sealing pair valve body and butterfly plate are first vulcanized or glued with a layer of rubber, and then covered with a layer of PTFE

Circular arc contact sealing pair. There are many forms of this type of sealing pair structure, the characteristic is that the butterfly plate and the sealing ring are in contact, and one of them must be in the shape of an arc.

Sanitary valve

Application range

Working pressure is 0.7MPa, -40~130%: highly pure industrial pipelines such as medicine and food

Cutoff and regulation of corrosive media

Working pressure 1. 8~4.0MPa Cutoff and regulation of industrial media

Sanitary valve

Serial number

7

8

9

Structural features

Circular high elastic sealing ring. The sealing ring is a foam plastic wrapped in rubber, with extremely high elasticity and flexibility, and the amount of compression can be adjusted by the pressure plate

Fan-shaped elastic sealing ring. It is fixed with a pressure plate and fastening bolts, and the fit of the sealing pair can be adjusted with bolts

Ω-shaped high-elastic sealing ring, pressed by a pressure plate and fixed with bolts, with a metal wire rope reinforcement ring embedded inside, which is flexible and can prevent the radial expansion and contraction of the sealing ring

Sanitary valve

Application range

Low-pressure pipelines such as ventilation, gas and water

Pipes with a working pressure of 1.0MP·

High and medium-pressure pipeline systems

Sanitary valve

Serial number

10

11

12

13

Structural features

Dumbbell-shaped rubber sealing ring, with an O-shaped fixing ring to limit the sealing ring, prevent the sealing ring from sliding out of the groove, with very good sealing performance and long service life

Duck-shaped sealing ring, pressed by a pressure plate, has high elasticity and good sealing performance

Gourd-shaped rubber sealing ring, pressed laterally with a compression bushing and fixed with bolts, butterfly plate sealed and hard chrome plated

J-shaped rubber sealing ring. The sealing ring is composed of a metal base material and a special rubber vulcanized layer. It is easy to disassemble and assemble, can withstand high pressure, and the rubber thickness is usually 7~12mm

Application range

-30~100℃ pipeline system

-200~200℃ pipeline system

Pipeline system with a working pressure of 2.5MPa

High and medium pressure pipeline system
After understanding the structural type of sanitary valves, let's talk about the operating specifications. For example, when operating a butterfly valve, the handle needs to be pulled out of the positioning hole and then opened. There are no major requirements for the operation of the sanitary check valve, which can be installed horizontally or vertically.