Tungsten Carbide Valve Seat
The valve seat is one of the components in the valve. Its main working principle is to support the valve core to ensure that it remains in the correct position to achieve sealing, adjustment and other functions.
Therefore, during the working process, the valve seat, valve core and other parts need to be in contact with corrosive media for a long time, which means heir service life is relatively limited.
Under normal circumstances, the valve seat is designed to be a detachable part from the equipment. This is done to facilitate replacement in order to achieve the purpose of cost saving. Valve seats of different materials and specifications can also adapt to different working environments.
The valve seats on the market are made of various materials. According to the valve type, the valve seat can be divided into stop valve seat, ball valve seat, gate valve seat, butterfly valve seat, etc. And cemented carbide valve seats are popular in various industrial fields.
Product Description
In petrochemical, energy and power, water treatment and municipal engineering, pharmaceutical and food industry, shipbuilding and marine engineering, mining and metallurgy and other industries, valve seats have been widely used.
- Mining and metallurgical industry: usually used in mud pump valves, slurry control valve seats, blast furnace gas systems, aluminum melting furnace discharge valves and other positions. These working environments are harsh, and the valve seat needs to contact acid and alkali media. There are many impurities in contact, which places high requirements on the material of the valve itself.
- Petrochemical industry: used in slide valves, plug valves, quench oil regulating valves and other environments. In these positions, the valve seat plays a key role in sealing and regulating flow. The manufacturing of petrochemical valve seats has always been related to the three themes of “high temperature, high pressure, and high corrosion”. After long-term contact with high-pressure hydrogen, catalyst erosion, and 98% sulfuric acid solution, the carbide valve seat can still maintain good performance and increase the service life by 4-5 times.
- Food and pharmaceutical industry: in the application of the valve seat in this industry, in addition to meeting the most basic requirements of wear resistance and corrosion resistance, it also needs to meet ultra-high hygiene standards. Such as sterilant dispensing valves, vaccine filling line sterile ball valves and other working environments. When processing and customizing carbide valve seats for such applications, special alloy materials and mirror polishing are required to achieve the “zero dead angle”.
Characteristics of cemented carbide valve seats:
- High hardness: cobalt and other metals are added to tungsten powder as binders, and through dense sintering, stress concentration points are reduced to form a unique microstructure. While forming high hardness, toughness is given. Tungsten carbide has a hardness of HV 2000-2800 and a compressive strength of 500-700 MPa.
- High wear resistance: these metals form a strong bond during the sintering process, have high density and low porosity, and directly resist wear caused by contact impurities.
- High corrosion resistance: when encountering customized requirements for high corrosion resistance, we will choose to use nickel-based instead of cobalt-based. The corrosion resistance of nickel is due to cobalt;
- High temperature and high pressure stability: the performance of tungsten carbide has good stability. The valve seat made of tungsten carbide, can make it still have excellent anti-deformation ability under high temperature and high pressure environment.
Our advantages as a supplier:
- As of 2025, we have more than 25 years of experience in the field of tungsten carbide;
- Four production lines can meet the different needs of blanks and finishing;
- From 100% raw materials to finished products, strict quality control system;
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