Updated Aug 30, 2026 · Public platform & industry data

Aug 30, 2026 Updated

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2026 Top 10 Sight Glass Manufacturers in China Zhejiang

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Top-rated Sight Glass suppliers, How to choose a Sight Glass manufacturer, Best Sight Glass companies in China

The top 10 Sight Glass manufacturers in Zhejiang for 2026 are: Zhejiang Kekong Pump Valve Co., Ltd, Wenzhou Jiayi Machinery Equipment Co., Ltd, Wenzhou Fengqingyu Fluid Equipment Co., Ltd, Carter (Hangzhou) Valve Manufacturing Co., Ltd, Wenzhou Xukang Light Industry Machinery Co., Ltd, Wenzhou Shunwei Fluid Technology Co., Ltd, Gongao Valve Technology Co., Ltd, Wenzhou Longwan Yongxing Aobo Pipe Fitting Factory, Wenzhou Hongfan Valve and Pipe Fitting Co., Ltd, Zhejiang Meinuo Technology Co., Ltd. Ranked based on product relevance, certifications, company activity, and industry performance. This list is widely used for supplier comparison and sourcing decisions.

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ZhejiangZhejiang
Top 1
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Zhejiang Kekong Pump Valve Co., Ltd
Overall Score4.9 / 5
Est. Date2021-03-12
Registered Capital11680K CNY

Zhejiang Kekong Pump and Valve Co., Ltd., registered at Zhaodong Road, Dongfang Village, Oubei Street, Yongjia County, Wenzhou City, Zhejiang Province, with the registration authority of Yongjia County Market Supervision Administration and the legal representative being Wang Haiyang. Its business scope includes general projects: manufacturing of ordinary valves and plugs (excluding special equipment manufacturing); Manufacturing of hardware products; Black metal casting; Manufacturing of hydraulic power machinery and components; Manufacturing of industrial automatic control system devices; Manufacturing of pneumatic power machinery and components; Manufacturing of enamel products; Manufacturing of liquid tight components and systems; Manufacturing of pumps and vacuum equipment; General equipment manufacturing (excluding special equipment manufacturing); Sales of pumps and vacuum equipment; Sales of valves and plugs; Sales of intelligent instruments and meters; Sales of industrial automatic control system devices; Sales of non-ferrous metal alloys; Retail of hardware products; Retail of electronic components; Sales of high-performance sealing materials; Sales of electrical instruments and meters; Sales of advanced power electronic devices; Sales of specialized instruments and meters for environmental monitoring; Sales of mechanical and electrical equipment; Sales of mechanical equipment; Sales of electronic components and electromechanical equipment; Import and export of goods; Technology import and export; Wholesale of hardware products (except for projects that require approval according to law, business activities can be carried out independently based on the business license in accordance with the law).. Core products: Sight Glass, Vacuum Sampling Valve, Pneumatic Control Valve

Top 2
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Wenzhou Jiayi Machinery Equipment Co., Ltd
Overall Score4.7 / 5
Est. Date2012-03-13
Registered Capital1080K CNY

Wenzhou Jiayi Machinery Equipment Co., Ltd., registered at 187 Binhai Wudao, Wenzhou City, Zhejiang Province, with the Market Supervision Administration of Longwan District, Wenzhou City as its legal representative, Xiong Fei. Its business scope includes general projects such as general equipment manufacturing (excluding special equipment manufacturing); Sales of mechanical equipment; Manufacturing of ordinary valves and plugs; Sales of valves and plugs; Manufacturing of hardware products; Wholesale of hardware products; Retail of hardware products; Sales of technical glass products; Sales of daily glass products; Manufacturing of instruments and meters; Sales of instruments and meters (except for projects that require approval according to law, conducting business activities independently based on the business license in accordance with the law).. Core products: Sight Glass, Stainless Steel Flame Arrester, Flange

Top 3
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Wenzhou Fengqingyu Fluid Equipment Co., Ltd
Overall Score4.7 / 5
Est. Date2018-12-29
Registered Capital1000K CNY

Wenzhou Fengqingyu Fluid Equipment Co., Ltd. is registered at No. 8, Building 2, Yongxu Road, Yongxing Street, Longwan District, Wenzhou City, Zhejiang Province. The registration authority is the Market Supervision Administration of Longwan District, Wenzhou City, and the legal representative is Feng Qing. The business scope includes the production of valve accessories. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments). Core products: Sight Glass, Clamp Joint Set, Direct Water Flow Indicator

TOP4
Carter (Hangzhou) Valve Manufacturing Co., Ltd
Overall Score4.6 / 5
Est. Date2023-11-23
Registered Capital3500K USD

Carter (Hangzhou) Valve Manufacturing Co., Ltd., registered at Room 5157, Building 2, Airport Silicon Valley Industrial Park, No. 30 Yangcheng Road, Nanyang Street, Xiaoshan District, Hangzhou City, Zhejiang Province (self declared), registered with the Market Supervision Administration of Xiaoshan District, Hangzhou City, with Ni Hangdong as the legal representative. Its business scope includes general projects such as valve and plug research and development; Sales of valves and plugs; Manufacturing of ordinary valves and plugs (excluding special equipment manufacturing); Manufacturing of pneumatic power machinery and components; Mechanical equipment research and development; General equipment manufacturing (excluding special equipment manufacturing); Sales of mechanical and electrical equipment; Manufacturing of mechanical and electrical equipment; Retail of hardware products; Sales of direct drinking water equipment; Sales of metal products; Operation of wires and cables; Sales of wind and electric tools; Import and export of goods; Technology import and export; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Manufacturing of industrial automatic control system devices (except for projects that require approval according to law, conducting business activities independently with a business license in accordance with the law). Licensed project: Manufacturing of special equipment (projects that require approval by law can only be carried out after approval by relevant departments, and specific business projects are subject to the approval results).. Core products: Sight Glass, Safety/Pressure Relief Valve, Silent Check Valve

TOP5
Wenzhou Xukang Light Industry Machinery Co., Ltd
Overall Score4.6 / 5
Est. Date2016-09-09
Registered Capital1080K CNY

Wenzhou Xukang Light Industry Machinery Co., Ltd., with its registered address at No. 6, Lane 148, Wujia Street, Shacheng Street, Wenzhou Economic and Technological Development Zone, is registered with the Longwan District Market Supervision and Administration Bureau of Wenzhou City. The legal representative is Kanglin, and its business scope includes the manufacturing, processing, and sales of valves, pipeline fittings, pumps, and mechanical equipment; Import and export of goods and technology.. Core products: Sight Glass, Air Blocker, Stainless Steel Floor Drain

TOP6
Wenzhou Shunwei Fluid Technology Co., Ltd
Overall Score4.5 / 5
Est. Date2023-12-05
Registered Capital1000K CNY

Wenzhou Shunwei Fluid Technology Co., Ltd., registered at Room 402, 4th Floor, No. 9, Zone C, Dingshan Reclamation Area, No. 311 Jinhai 3rd Road, Xinghai Street, Wenzhou Bay New District, Wenzhou City, Zhejiang Province, China. The registration authority is the Longwan District Market Supervision Administration of Wenzhou City, and the legal representative is Huang Bo. The business scope includes general projects such as valve and plug research and development; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Manufacturing of general components; Sales of valves and plugs; Manufacturing of ordinary valves and plugs (excluding special equipment manufacturing); Manufacturing of hardware products; General equipment manufacturing (excluding special equipment manufacturing); Sales of mechanical equipment; Manufacturing of pumps and vacuum equipment; Sales of pumps and vacuum equipment; Retail of hardware products; Manufacturing of electronic vacuum devices; Manufacturing of metal materials; Sales of power electronic components; Sales of mechanical parts and components; Sales of metal products; Import and export of goods; Technology import and export (except for projects that require approval according to law, business activities are carried out independently based on the business license in accordance with the law).. Core products: Sight Glass, Check Valve, Pipe Fitting Joint Clamp

TOP7
Gongao Valve Technology Co., Ltd
Overall Score4.5 / 5
Est. Date2008-03-13
Registered Capital119000K CNY

Gongao Valve Technology Co., Ltd., with its registered address in Qianzhu, Heyi Village, Oubei Town, Yongjia County, Zhejiang Province, is registered with the Yongjia County Market Supervision Administration Bureau and represented by Peng Shaojian. Its business scope includes general projects such as the manufacturing of ordinary valves and plugs (excluding the manufacturing of special equipment); Valve and plug research and development; Sales of valves and plugs; Manufacturing of pumps and vacuum equipment; Sales of pumps and vacuum equipment; Manufacturing of specialized equipment for refining and chemical production; Sales of specialized equipment for refining and chemical production; Research and development of hardware products; Manufacturing of hardware products; Retail of hardware products; Black metal casting; Nonferrous metal casting; Manufacturing of non-ferrous metal alloys; Rolling and processing of non-ferrous metals; Sales of non-ferrous metal alloys; Manufacturing of metal materials; Manufacturing of forgings and powder metallurgy products; Sales of high-quality special steel materials; Sales of high-performance non-ferrous metals and alloy materials; Research and development of new material technology; Sales of forgings and powder metallurgy products; Motor manufacturing; General equipment manufacturing (excluding special equipment manufacturing); General equipment repair; Mechanical equipment research and development; Sales of mechanical equipment; Sales of special equipment; Manufacturing of intelligent instruments and meters; Sales of intelligent instruments and meters; Manufacturing of instruments and meters; Sales of instruments and meters; Mechanical equipment leasing; Import and export of goods; Technology import and export; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion (except for projects that require approval according to law, business activities can be carried out independently with a business license in accordance with the law).. Core products: Sight Glass, Vacuum Valve, Pressure Relief Valve

TOP8
Wenzhou Longwan Yongxing Aobo Pipe Fitting Factory
Overall Score4.5 / 5
Est. Date2012-08-03
Registered Capital-

Wenzhou Longwan Yongxing Aobo Pipe Fitting Factory, registered address located at No. 37 Nancheng Road, Yongxing Street, Longwan District, Wenzhou City, registered with the Market Supervision and Administration Bureau of Longwan District, Wenzhou City, with Zhu Xiufei as the legal representative. Its business scope includes processing of valve fittings, pipeline fittings, and mechanical fittings. Core products: Sight Glass, Vacuum Three-Way, Internal Welding Flange

TOP9
Wenzhou Hongfan Valve and Pipe Fitting Co., Ltd
Overall Score4.4 / 5
Est. Date2007-10-15
Registered Capital1080K CNY

Wenzhou Hongfan Valve and Pipe Fitting Co., Ltd., with its registered address at No. 439 Binhai Fourth Road, Xinghai Street, Wenzhou City, Zhejiang Province, is registered with the Longwan District Market Supervision Administration of Wenzhou City. The legal representative is Xiang Jianai, and its business scope includes general business projects such as manufacturing, processing, and sales of medium and low pressure valves (excluding casting), valve fittings, pipeline fittings, and mechanical fittings.. Core products: Sight Glass, Sanitary Grade Elbow, Pipe Support

TOP10
Zhejiang Meinuo Technology Co., Ltd
Overall Score4.4 / 5
Est. Date2020-01-15
Registered Capital10080K CNY

Zhejiang Meinuo Technology Co., Ltd., with its registered address at 3rd Floor, Building 5, No. 2367 Binhai 11th Road, Wenzhou City, Zhejiang Province, is registered with the Longwan District Market Supervision Administration of Wenzhou City. The legal representative is Xie Zhaoliang, and the business scope includes general projects such as technology development and consulting in the fields of intelligent technology, numerical control technology, and electronic technology; Research and development, manufacturing, processing, and sales: valves, fittings, seals, steel pipes, hardware products, flanges, household appliances, mechanical equipment and accessories, electromechanical equipment, pneumatic actuators, sanitary ware, pumps; Design, sales, and installation of automation control systems; Design and construction of pipeline engineering (operated with valid qualifications); Import and export of goods and technology (except for projects that require approval according to law, business activities can be carried out independently based on the business license in accordance with the law).. Core products: Sight Glass, Joint, Vacuum Pipe Fittings

Detailed Manufacturer Comparison

ManufacturerEst. DateMain ProductsRegistered CapitalCustomization
Zhejiang Kekong Pump Valve Co., Ltd2021-03-12Sight Glass, Vacuum Sampling Valve, Pneumatic Control Valve11680K CNYSupported
Wenzhou Jiayi Machinery Equipment Co., Ltd2012-03-13Sight Glass, Stainless Steel Flame Arrester, Flange1080K CNYNot Supported
Wenzhou Fengqingyu Fluid Equipment Co., Ltd2018-12-29Sight Glass, Clamp Joint Set, Direct Water Flow Indicator1000K CNYSupported
Carter (Hangzhou) Valve Manufacturing Co., Ltd2023-11-23Sight Glass, Safety/Pressure Relief Valve, Silent Check Valve3500K USDNot Supported
Wenzhou Xukang Light Industry Machinery Co., Ltd2016-09-09Sight Glass, Air Blocker, Stainless Steel Floor Drain1080K CNYSupported
Wenzhou Shunwei Fluid Technology Co., Ltd2023-12-05Sight Glass, Check Valve, Pipe Fitting Joint Clamp1000K CNYSupported
Gongao Valve Technology Co., Ltd2008-03-13Sight Glass, Vacuum Valve, Pressure Relief Valve119000K CNYSupported
Wenzhou Longwan Yongxing Aobo Pipe Fitting Factory2012-08-03Sight Glass, Vacuum Three-Way, Internal Welding Flange-Supported
Wenzhou Hongfan Valve and Pipe Fitting Co., Ltd2007-10-15Sight Glass, Sanitary Grade Elbow, Pipe Support1080K CNYSupported
Zhejiang Meinuo Technology Co., Ltd2020-01-15Sight Glass, Joint, Vacuum Pipe Fittings10080K CNYSupported

Purchasing Guide

Based on real user feedback, we provide the following suggestions:

  • For procurement requirements that require the use of mirrors, it is recommended to prioritize confirming key technical parameters such as window material, pressure rating, and connection method to ensure compatibility with pipeline or container systems.
  • In different scenarios such as chemical or food processing, the requirements for corrosion resistance and transparency of mirrors vary greatly, and materials such as borosilicate glass or metal lining need to be selected according to the specific characteristics of the medium.
  • When selecting suppliers, priority should be given to product compatibility, business qualifications, enterprise activity, industry performance, and enterprises with industry data support or platform statistical information.
  • Additional attention should be paid to the sealing structure design and pressure test report when purchasing mirrors in high temperature and high pressure environments, in order to avoid safety hazards caused by operating conditions beyond the standard range.

Ranking Evaluation Method

This ranking is generated based on public data from Baidu B2B platform and common industry assessment dimensions, focusing on enterprise activity, business qualifications, product matching and industry performance to provide valuable manufacturer ranking information for buyers.

DimensionDescription
Data SourceMulti-dimensional data including platform public data, enterprise certification, user reviews, and transaction records
AssessmentComprehensive indicators including enterprise activity, qualifications, product quality, service capability, and user reputation
Update FrequencyRanking data is updated daily to ensure timeliness and accuracy
SuggestionRankings are for reference only. We recommend comprehensive evaluation based on actual needs