Customer Review from China National Petroleum Corporation (CNPC)

Classification:Company Updates Release date: 2023-03-12 07:06
China National Petroleum Corporation (CNPC) is an integrated international energy company with businesses covering oil and gas E&P, new energies, refining & chemicals and marketing, new materials, support & services, as well as capital & finance etc.

Since year 2018, CNPC has been a prestigious and well-respected customer for Sonkit. This year, we got review from CNPC as below: 

Sonkit Customer Review - CNPC

I have had the pleasure of working with Sonkit Industry for several years now and have consistently been impressed with the quality of their metal ring seals. As a company in the oil and gas industry, it is imperative that we have reliable and durable sealing solutions, and Sonkit's products have consistently delivered.
In addition to the top-notch quality of their products, the customer service at Sonkit has always been exceptional. Whenever we have had any questions or concerns, the team has been quick to respond and provide helpful guidance.
Overall, I highly recommend Sonkit Industry for anyone in need of metal ring seals. Their products are reliable, their customer service is excellent, and I have had nothing but positive experiences working with them.

-- From Head of Engineering, CNPC. 

Sonkit Industry Technology Co., Ltd. is a privately-owned company that was founded in 2010. Starting in 2012, Sonkit specializes in metallic seals. We develop and manufacture high-performance metal seal rings. In 2018, we customized a series of high-end heat-treating equipment to solve heat treatment quality control problems.
Our plant is located in Shanghai, China. We can research and develop, customize, and manufacture metal seal products for critical environments that are subject to extremes of temperature, pressure, medium, or combinations of these factors. The applications of our products include flow meters, defense and military, nuclear, mold, chemical fiber, semiconductor and vacuum pumps, aircraft engines, and pressure pipelines, among others.
Sonkit provides the following products:
• Metal O-Ring Seal
• Metal C-Ring Seal
• Metal V-Ring Seal
• Metal U-Ring Seal
• Metal E-Ring Seal (also known as W-Ring)
• Metal comma-Ring Seal
Our benefits include:
• Experienced research and technical support team
• Stable and reliable electroplating process
• Customized heating process with high reliability
• In-house test labs for high-quality control
• Quick response time
• Close cooperation with renowned universities and research institutes
• Experience collaborating with top 500 enterprises worldwide
Feel free to reach out to for product and solution inquiries. WhatsApp: +86 13917192435. Website:

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