Valve Patent Certificates — SIL & 20+ Invention Patents

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Valve Patent Certificates & SIL Safety Certification

TANGGONG Valve Group's patent portfolio reflects 36 years of continuous innovation in industrial valve engineering. Our intellectual property includes 4 invention patents covering core echnologies such as self-sealing ball valve mechanisms, high-sealing butterfly valve designs, and dual-valve integrated structures, along with 16 utility model patents for valve improvements across ball, gate, butterfly, check, and regulating valve categories. Additionally, we hold SIL (Safety Integrity Level) certifications demonstrating compliance with IEC 61508 functional safety standards for critical applications, and a health permit certifying suitability for potable water and food-grade service environments. Each patent represents our commitment to advancing valve performance, reliability, and safety. Explore the full portfolio below, or visit our qualification certificates and honor certificates for more.

Flange type test certificate

Gate valve type test certificate

Ball valve type test certificate

Tee Fitting Type Test Certificate

Gate valve type test certificate

Check valve type test certificate

SIL Safety Integrity Level Certification

Safety Integrity Level (SIL) certification per IEC 61508 verifies that TANGGONG valves meet functional safety requirements for use in hazardous and critical-process environments, including oil & gas, petrochemical, and power generation applications.

Health & Sanitary Permit

Our health permit certifies that selected valve products comply with sanitary standards for potable water systems and food-grade processing applications.

Invention Patents

These patents protect TANGGONG's proprietary core technologies, including self-sealing valve body mechanisms, rapid assembly ball valve designs, high-sealing butterfly valve structures, and integrated dual-valve systems — each representing a significant advancement in valve engineering.

Utility Model Patents

Our 16 utility model patents cover structural improvements and design optimizations across ball valves, gate valves, butterfly valves, check valves, regulating valves, and fluoropolymer-lined valves — enhancing performance, durability, and operational efficiency.

Explore More Certificates

Qualification Certificates

View API 6D, API 600, API 624, CE, EAC, and ISO 15848-1 qualification certificates.

Honor Certificate

View TANGGONG's association memberships, manufacturing excellence awards, and credit rating certificates.

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