Certified to international standards, including ISO 9001:2000, TRD 100, CE, API 6D and DNV. 

Our journey began in 1979 with the establishment of Sow Long Industrial Co., Ltd. At the time, the company focused on valve assembly and distribution, achieving annual sales of approximately 1,500 tons despite not having its own foundry facilities.

In 2000, the company expanded its manufacturing operations by establishing a second factory in China. Covering an area of 22,000 square meters, the facility includes its own foundry and has a production capacity of 2,200 units per year. With a total investment of approximately THB 442 million, the factory strengthened the company's manufacturing capabilities and increased annual sales to 2,000 tons.

Building upon decades of experience and continuous growth, Long Chang Valve (Thailand) Co., Ltd. now operates its own manufacturing facilities and imports high-quality valve products for distribution throughout Thailand. We are committed to delivering reliable products and solutions that meet the needs of various industries.

Our mission is to be your trusted partner and preferred supplier. We strive to provide products that meet the highest quality standards, ensure on-time delivery, and offer outstanding customer support. Through continuous improvement and dedication to excellence, we aim to meet and exceed the expectations of today's demanding business environment.