Are you also looking for a professional answer to the difference between the valve core and the valve body? Then the following content will be helpful to you, and you only need to spend 2-3 minutes.
In order to make it easier for everyone to understand, we divide the entire answer to “What is the difference between the valve core and the valve body?” into 5 small parts, so that you can more easily master the professional knowledge of the valve core and the valve body from these 5 small parts.
1: Function
2: Structural characteristics
3: Materials and processes
4: Failure mode and maintenance
5: Industry application
1: Function
Valve core function
The valve core is the core moving part of the valve, which is used to control the flow state of the medium. It has the following functions:
On-off control: open/close the fluid channel, such as: stop valve disc.
Flow regulation: change the diameter by displacement, such as: adjusting the valve needle core.
Flow direction switching: change the medium path, such as: four-way valve rotating core.
Pressure stability: maintain system pressure, such as: safety valve pilot core.
Valve body function
The valve body is one of the important parts of the valve. It belongs to the outer shell of the valve and is used to contain and control the flow of fluid media. The valve body is usually connected to the pipeline system. As part of the fluid channel, it has the following functions:
Provide fluid channels.
Support other parts of the valve, such as valve discs, valve stems, etc.
Bear the pressure and temperature of the pipeline system.
Provide connection interfaces with other pipeline components.
2: Structural features
Valve core structural features
1. Can rotate, lift or slide, such as the ball core of a ball valve and the valve disc of a stop valve.
2. Extremely high precision requirements, surface finish Ra0.4 or less, tolerance ±0.01mm.
3. Direct contact with the medium (liquid/gas), corrosion/wear resistance is required.
4. Common valve core structures include spheres, tapered plugs, plungers, valve discs, etc.
Valve body structural features
1. Fixed and immovable, only used as a container and connecting pipes.
2. High precision requirements, the flatness of the sealing surface must be guaranteed.
3. Mainly bear pressure, high-strength materials are required.
4. Common valve body structures include shell, flange, flow channel, sealing groove, etc.
3: Materials and processes
Material and processes required for valve core
1. Common materials include stainless steel (304/316), ceramic, cemented carbide (wear-resistant), etc.
2. Key processes include precision grinding, polishing, and chrome plating (the function is to ensure sealing).
3. Heat treatment mainly includes surface hardening (such as nitriding and quenching).
Material and processes required for valve body
1. Common materials include cast iron, carbon steel, and stainless steel (for pressure bearing).
2. Key processes include casting/forging and CNC processing (to ensure structural strength).
3. Heat treatment is mainly overall quenching and tempering treatment (to improve pressure resistance).
4: Failure mode and maintenance
Valve core
Common problems mainly include wear, corrosion, and jamming, which require “regular lubrication, replacement of seals, and selection of wear-resistant materials” to solve these problems.
Valve body
Common problems mainly include cracks, sealing surface damage, and thread stripping. These problems need to be solved through “pressure testing, repairing the sealing surface, and avoiding overpressure use”
5: Industry application
Regarding industry application, here are 3 common industries and applications, namely:
1. Oil pipeline valve
Valve body: forged with carbon steel, resistant to high pressure (such as API 6D standard)
Valve core: hard alloy coating is used to prevent sand wear
2. Medical equipment valve
Valve body: 316L stainless steel, sterile polishing
Valve core: ceramic material to avoid metal ion precipitation
3. Automobile fuel valve
Valve body: aluminum alloy lightweight design
Valve core: precision electromagnetic control component
Both the valve core and the valve body are important components of the valve. The valve core mainly determines the control performance of the valve, which requires high precision and wear resistance; the valve body provides the structure and sealing basis, which requires high strength and pressure resistance.
This article “What is the difference between the valve core and the valve body? “The master of Foshan Ruizheng Factory answers you” is answered by the master of Foshan Ruizheng (https://spindleshaft.com/) factory based on years of professional knowledge and experience. I hope it can help more friends!
If you need custom processing services for valve cores and valve bodies, you can contact us Foshan Ruizheng. We will provide you with professional custom processing solutions and quotations for valve cores and valve bodies. You can also communicate with us on Whatsapp!
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