AS-C477 Dual cartridge seal

AS-C477 cartridge seal is customized dual seal  with multiple spring   that  made as per client drawing.

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Background:

Comparison of performance of domestic and foreign sealing materials (SiC)
Testing and inspection technology level: Most foreign multinational companies have advanced and complete testing platforms, and have independently developed advanced numerical simulation software for sealing, which can conduct experimental research on technical parameters such as sealing end face clearance and temperature distribution. However, most sealing enterprises in China only have performance testing methods for product factory inspection, and there is a lack of research on common key basic technologies such as high parameter sealing testing technology and reliability testing under extreme conditions, especially the lack of large-scale testing equipment with ultra-high parameters. Testing and testing technology are relatively backward, mainly reflected in the measurement accuracy of testing equipment, online control capability, reliability and repeatability of testing results, as well as the formulation and revision of relevant testing standards. According to the data released by the Hydraulic, Pneumatic and Sealing Association in 2020, the product standards adopted in China are on average 9.4 years behind foreign standards.
Comparison of Performance between PEEK Polyether Ether Ketone and PTFE Teflon Materials
Comparison of performance of domestic and foreign sealing materials (SiC)

Comparison of Common Mechanical Seal Materials (Silicon Carbide, Hard Alloy, Ceramics, etc.)
The selection of mechanical seal materials mainly depends on the working environment, such as operating temperature, working pressure, working medium, and movement mode. The basic requirements and characteristics of common materials are as follows:
Mechanical properties: Both require certain tensile strength, elongation, etc., but the specific values vary. For example, hard alloys usually have higher tensile strength.
Elasticity and hardness: Elasticity and hardness should be appropriate, with minimal compression deformation. Ceramics have high hardness but poor elasticity, while silicon carbide has both elasticity and hardness.
Temperature resistance: Both should be resistant to high and low temperatures, without decomposition or softening at high temperatures, and without hardening at low temperatures. Different materials have different temperature ranges, and ceramics have better high-temperature resistance.
Adaptability to working medium: It should be compatible with the working medium without swelling, decomposition, hardening, etc. In highly corrosive media, silicon carbide and ceramics have better corrosion resistance.
Oxygen resistance and aging resistance: Both require good oxygen resistance and aging resistance, as well as durability.
Wear resistance: Both should be wear-resistant and not corrode metals. Hard alloys usually have good wear resistance.
Processing capability and cost: It should be easy to form and process at a low price. Ceramic processing is relatively difficult and costly, while silicon carbide processing is relatively easy and cost-effective.