Company Profile

Zhejiang Zhengfeng Valve Co.,Ltd
Tel: 86-577-67388156
Fax: 86-577-67318585
Email: sales@zfvalve.com
Contact person: DAVID
Add: Hengtong Road, Wuxing Industrial Park, Wenzhou, Zhejiang, China. 325105

Home > Quality Control

Zhejiang Zhengfeng Valve Ltd. Co. is consistent to provide our customers with high quality industrial valves. We ensure it by carrying out a series of quality control measures strictly.

We have raw material suppliers who have long-term relationships with us, providing us with good quality raw materials.

We have advanced equipments that provide guarantee for manufacturing valves.

We have experienced employees who design, manufacture high quality valves.

We carry out 100% testing before delivery valves.


ZFV have professional QC person, who makes sure all valve we provided is 100% inspected before dispatched. If customer need, can nominate any third party inspector to inspect and test, witness each procedure of valve production. "Quality First" is our promise forever to all our customers.

For ensuring quality of raw material, we are equipped with specialized laboratories, professional equipment to carry out chemical analysis, mechanical performance analysis, impact test, hardness test, NDT test etc. Before deliverying valve, we carry out dimension inspect, visual test, hydrosatic test, painting test etc. Make sure that the raw materials meet the requirements of standards, requirement of customer.


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Dimension Inspection


Painting Test


PMI Test


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Hydro Test


Thickness Test


NDT(PT)


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Cryogenic Treatment

Ultrasonic cleaning

Packing and Shipment