China's Sand Casting Workshop With An Annual Output Of 5000-6000 Tons

- Jul 24, 2019-

Established in 1986, Wenzhou Longzhu Industrial Co., Ltd. is a manufacturing enterprise which integrates research, development, production and sales of valve castings and mechanical parts. Products include carbon steel castings, stainless steel castings, duplex stainless steel castings, low alloy steel castings, mainly used in valve, mechanical, pump and mine.


Longzhu has the world-class resin sand casting production line, CNC lathe, machining center and other advanced processing equipment used to produce various steel castings. With perfect processing facilities, standardized manufacturing and specialized division of labor, a perfect sand casting production and manufacturing process has been formed. Huge investment has been invested to establish a new product research and development center for special steel castings.  Steel grades include carbon steel, alloy steel, low temperature steel, stainless steel and duplex stainless steel.

Longzhu always adheres to the principle of "reputation first, quality first", relying on the new sand casting technology and efficient production capacity, castings are exported to the United States, Canada, Britain, Japan, India, Switzerland and other countries.

 valve casting

Longzhu welcomes customers from all over the world to visit, consult, or send email to us to get more information:

Carbon Steel Casting

Sand Cast Carbon Steel Casting

WCB Valve Casting

WCC Valve Casting

LCB Valve Casting