From June 9 to 11, 2026, the annual international chemical equipment conference—2026 China International Chemical Equipment Exhibition (CTEF)—will be held at the Shanghai New International Expo Centre.

Weldouli Valves Co., Ltd.​ will showcase cutting-edge equipment and products at the exhibition. Visit us at Booth: E3202. We welcome industry colleagues from both domestic and international markets to visit our booth for exchanges, procurement discussions, and cooperation.

Company Profile

Weldouli Valves Co., Ltd. was founded in 1989 and is currently located at No. 20 Xingyu Road, Konggang New District, Wenzhou. It is a national high-tech enterprise specializing in the R&D, production, and sales of rare and precious metal material valves. The company covers a construction area of 43,500 m², with a registered capital of 156.89 million yuan. It has over 270 employees, including 54 R&D personnel, 25 of whom hold intermediate or senior professional titles. The company holds 114 national patents, including 17 invention patents, and is a drafting unit for titanium and titanium alloy valve standards. It is currently a leading professional manufacturer of special alloy valves in China.

The company is a national-level "Specialized, Refined, Unique, and Innovative" key "Little Giant" enterprise. It operates the Zhejiang Weldouli Special Material Valves Research Institute and is recognized as a Wenzhou National Independent Innovation Demonstration Zone Innovative Leading (Gazelle) Enterprise, a Zhejiang Provincial High-Tech Enterprise R&D Center, a Zhejiang Provincial Enterprise Technology Center, a Zhejiang Provincial Growth-oriented SME, a Zhejiang Provincial Science and Technology-based SME, a Zhejiang Provincial Science and Technology Little Giant Enterprise, and a Zhejiang Provincial Digital Workshop. It has received awards including the Longwan District Chief Quality Award, recognition as a Nurturing Enterprise for "Hidden Champions," and a municipal-level expert workstation. The company has also been honored with the Zhejiang Provincial Science and Technology Progress Second Prize, the Zhejiang Mechanical Industry Federation Science and Technology First Prize, the China Petroleum and Chemical Industry Federation Science and Technology Progress Third Prize, and the Wenzhou City Science and Technology Progress Third Prize. In 2022, it was named among the Top 100 High-Tech Enterprises in Wenzhou, a Five-Star Enterprise in Longwan District and Wenzhou High-Tech Zone (Economic Development Zone), and a "Waste-Free Enterprise."

The company holds certifications including the National Special Equipment Pressure Pipeline Component Manufacturing License (TS) A1 Grade, China Classification Society (CCS) certification, DNV ISO9001 International Quality System certification, CNAS Laboratory accreditation, American Petroleum Institute (API) certification, EU CE certification, Class A Import-Export Enterprise qualification, Customs CU-TR certification, and ISO14001 and ISO18001 certifications for environment, health, and safety.

The company possesses a digitalized intelligent workshop, a 100,000-class clean room, a 2500LB high-pressure gas test system, an 800℃ high-temperature test system, fire resistance test, cryogenic test, flow characteristic test, and life test devices, a gamma-ray non-destructive testing room, CNC machining centers, vacuum welding equipment, vacuum surface modification equipment, and over 400 other high-end equipment units. It is equipped with testing instruments such as a Niton handheld XRF alloy analyzer, a coordinate measuring machine, a German-made specialized direct-reading spectrometer, a metallographic microscope, an ultrasonic thickness gauge, a Brinell/Rockwell/Vickers hardness tester, a helium mass spectrometer leak detector, and an iron contamination detector. For intelligent management, the company has implemented systems including an intelligent sales management system, PLM design management system, ERP management system, MAS production management system, SolidWorks 3D design system, and fluid dynamics and strength calculation systems.

The company's main products include valves made from special materials such as titanium and titanium alloys, zirconium and zirconium alloys, nickel and nickel alloys, Hastelloy, Monel, Inconel, nickel-aluminum bronze, Alloy 20, 904L, duplex steel, tantalum, etc., as well as stainless steel valves. It holds a leading domestic advantage in these areas. Its products are primarily used in petrochemicals, fine chemicals, military industry, shipbuilding, seawater desalination, metallurgy, papermaking, textiles, power generation, natural gas, and other fields, often for valve supporting in imported equipment. Products are well-sold to major domestic medium and large enterprises and exported to over forty countries and regions including Europe, the Americas, the Middle East, Russia, Australia, and Chile. The company is committed to providing customers with valve solutions for various demanding working conditions. Over the years, its products and services have garnered widespread praise and trust from a vast clientele.

Adhering to the business philosophy of "Sincere Cooperation, Win-Win Creation," the company is willing to join hands with all sectors of society to create a brilliant future together!

Company Products:

Ball Valves

Plug Valves

Gate Valves

Butterfly Valves

Partial Honors and Qualifications:

May 2021: Awarded the title of National Specialized, Refined, Unique, and Innovative Key "Little Giant" Enterprise (First Batch). 

June 2021: Awarded the Zhejiang Provincial Science and Technology Progress Second Prize.

December 2021: Awarded the Petroleum and Chemical Industry Federation Science and Technology Progress Third Prize.

December 2021: Awarded the Zhejiang Mechanical Industry Science and Technology First Prize. 

September 2022: Recognized as a Provincial Intellectual Property Demonstration Enterprise. 

December 2022: Recognized as a Wenzhou Municipal Industrial Design Center. 

January 2023: Ranked among the Top 100 High-Tech Enterprises in Wenzhou.

May 2023: "Key Technology Development and Application of High-Performance Special Material Valves" won the Zhejiang Mechanical Industry Science and Technology Award - Third Prize.

November 2023: "Large-Diameter High-Pressure Strong Corrosion-Resistant Plug Valve" was rated as a 2023 Wenzhou City First (Set) Product.

November 2023: Rated as a Zhejiang Provincial Science and Technology Little Giant Enterprise. December 2023: Rated as a Zhejiang Provincial Enterprise Technology Center.

December 2023: "Titanium Alloy Self-Sealing Large-Diameter Butterfly Valve for High-Sulfur Acid Cleaning in Coking Coal Production" was rated as a 2023 Zhejiang Provincial First (Set) Product.

January 2024: Rated as a Wenzhou City Most Beautiful Factory. June 2024: Hosted the Wenzhou City "Unveiling and Commanding" Project: "Research on Key Technologies for Large-Diameter Valves with Strong Corrosion Resistance for Complex Working Conditions."

August 2024: Rated as a Wenzhou City Informatization and Industrialization Integration Demonstration Pilot Enterprise.

December 2024: "High Corrosion and Erosion Resistant Flash Control Valve for Non-Ferrous Metal Smelting" was rated as a 2024 Zhejiang Provincial First (Set) Product.

December 2024: "Special Material Lip Seal Hard Seal Ball Valve" was rated as a 2024 Wenzhou City First (Set) Product.

December 2024: Rated as a Zhejiang Provincial Digital Workshop.

Core Strengths

The High-Temperature Automatic Control Valve for Efficient Degradation of High-Concentration Harmful Wastewater, independently developed by Weldouli Valves Co., Ltd., has been recognized as a Zhejiang Provincial First (Set) Equipment.

Wu Changliang, Chairman of the Longwan District People's Political Consultative Conference, and Lin Gaimeng, Secretary of the Yongxing Street Party Working Committee, visited Weldouli Valves Co., Ltd. for a New Year visit. Company Chairman Xia Chongmao warmly received them and accompanied the tour.

Weldouli Valves Co., Ltd. announced more positive news. Due to its outstanding achievements in technological innovation system and platform construction, it has been recognized as a Zhejiang Provincial Key Enterprise Research Institute​.

Weldouli Valves' laboratory has officially passed the certification of the China National Accreditation Service for Conformity Assessment (CNAS), becoming one of the few enterprises in the industry with national-level laboratory accreditation. 

Weldouli was awarded the "Zhejiang Export Famous Brand" (Valid: 2025-2027), recognized for innovation-driven achievements that set industry benchmarks.

Zhou Zan, President of the Longwan Charity Federation, and Zheng Linglian, Vice President, visited Weldouli Valves. Chairman Xia Chongmao hosted the visit, discussing the new year's prospects.

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Contact:

Chen +86 18127991242 chenweiyi@zhenweiexpo.com

Elaine +86 13378449855 luxiaowen@zhenweiexpo.com