Carbide precision sealing ring is a key component of the rotating equipment, and the material of its core element, the sealing ring, directly affects the reliability of the equipment operation. Due to its high strength and wear resistance, hard alloy has become one of the mainstream materials in the field of mechanical seals.
Technical Content
The standards clearly define the technical requirements for the hard alloy sealing ring, covering the following three aspects:
1. Material Properties: Specifies the density, hardness, and bending strength indicators for the hard alloy used in the sealing ring. The density should be no less than 14.0 g/cm³, and the Rockwell hardness (HRA) should be no less than 88.0.
2. Processing Precision: Imposes mandatory requirements for the flatness and roughness of the sealing end face. The flatness error should not exceed 0.0009 mm, and the surface roughness Ra value should not exceed 0.2 μm.
3. Inspection Methods: Uses a metallographic microscope to detect the porosity of the material, verifies the geometric dimensions through a three-coordinate measuring instrument, and stipulates that the sealing ring must undergo an air pressure test to verify the sealing performance.
Standard Relevance
1. Supporting Standard System: This standard forms a complementary relationship with GB/T 14211-2019 "Test Methods for Mechanical Seals". The former specifies product manufacturing standards, while the latter provides performance testing methods.
2. Cross-Material Standard Collaboration: During the revision of standards such as honeycomb seal use of high-temperature alloy foil materials (released in 2024) and silicon nitride sealing rings (JB/T 8724-2023), this standard was listed as a technical reference basis in all revisions, reflecting the collaborative iterative mechanism of different material sealing ring standards.
3. Industry Standard Citing: In similar standards such as O-ring rubber seals for mechanical seals (JB/T 7757.2), a technical correlation network is established through the "Similar Standards" section to enhance the completeness of the sealing element standard system.
Application Fields
The hard alloy sealing rings are mainly used in centrifugal pumps, compressors and reaction vessels in industries such as petrochemicals, power and metallurgy. According to statistics, within five years after the implementation of this standard (2014-2019), the qualified rate of hard alloy sealing rings in China increased by 27%, and the failure rate of equipment due to sealing failure decreased by 15%. The technical indicators of this standard have become the core acceptance basis in the purchase contracts for sealing components.
SPEC
|
Material |
Solid tungsten carbide |
|
Surface |
Blank or Polished |
|
Chemical Composition |
10% Co & 90% WC |
|
Grain Size |
1.2 μm |
|
Hardness (HRA) |
≥90 |
|
Magnetic Force |
23 (KA/M) |
|
T.R.S |
3200 (N/mm2) |
|
Magnetic Saturation |
10.3 (Ms) |
|
Purpose |
Kind of accessories |
|
Density |
14.05 (g/cm3) |
Tungsten Cemented Carbide Grade
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Company Information
Kunshan Zhiyi Dingli Cemented Carbide Tool Co., Ltd. is a specialized manufacturer of carbide precision sealing rings for rotating equipment including pumps, compressors, and mechanical seals. Our sealing rings are produced from high-strength, wear-resistant tungsten carbide grades that withstand high pressure, high temperature, and corrosive environments. With precision grinding to Ra 0.2μm surface finish and tight dimensional tolerances, our rings ensure reliable sealing performance and extended service life in demanding industrial applications.
Our factory manufactures carbide precision sealing rings in diameters from 10 mm to 500 mm with custom sizes available on request. With CNC precision grinding and lapping equipment, we achieve Ra 0.2μm surface finish and flatness within 0.002 mm. Monthly capacity exceeds 8,000 pieces, serving pump, compressor, and mechanical seal manufacturers worldwide.
Testing Machine
Production Flow Chart
Packing & Delivery
Packing
1>Put the goods encased with plastic bag or plastic case in wooden box/carton/iron box, etc.
2>Other packing will be accept according to your needs.
FAQ
Q1: What diameters can you produce?
A1: Standard diameters from 10 mm to 500 mm; larger custom sizes available on request.
Q2: What surface finish do you provide?
A2: Precision grinding and lapping achieve Ra 0.2μm surface finish with flatness within 0.002 mm.
Q3: What is the typical delivery time?
A3: Standard sizes ship within 10-15 working days; custom rings require 20-30 working days.
About Color Aberration
Product pictures are all physical photography, due to photo-taking technology, light, display parameters, etc., there may be differences between the received physical objects and photos, please refer to the physical.
Cargo Receipt
All our products go through strict inspection and count before shipment. Please check the goods in person when they receive them.
Please refuse to sign and contact us if you find that the CTN number and model is wrong or the product is damaged in transit.
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