Import 2pc Threaded Ball Valve — Buy in Bulk from Supplier in China

The 2pc threaded ball valve from Zhejiang Wonston Valve Co., Ltd. is a full-port, investment-cast flow control device with a blow-out proof stem design. The valve body is manufactured from WCB carbon steel, CF8 (304 stainless steel), or CF8M (316 stainless steel), depending on the corrosion resistance required for the service environment. Threaded end connections comply with NPT or BSP standards, allowing direct installation into matching pipework without welding equipment. The full-port bore matches the internal diameter of the connecting pipe, which keeps pressure drop to a minimum and avoids flow restriction that would occur in reduced-bore alternatives.

Investment casting, also known as lost-wax casting, produces the valve body with dimensional accuracy and a smooth internal surface finish that reduces turbulence and sediment buildup. The blow-out proof stem is retained by a shoulder inside the valve body, so internal pressure cannot force the stem out of the packing chamber even if the stem nut loosens or the packing fails. This safety feature is standard in API 608 and ISO 5211 compliant designs. The two-piece body construction allows the valve to be disassembled for internal inspection or seat replacement, a maintenance advantage over one-piece welded designs but with one less potential leak path than three-piece configurations.

Buyers in oil and gas distribution, water treatment plants, and chemical processing facilities use this valve for on/off isolation of liquids and gases within its pressure-temperature ratings. Threaded ends suit smaller bore sizes and lower-pressure applications where socket weld or flanged connections would add unnecessary cost and weight. When sourcing from Wenzhou, Zhejiang Province, buyers should confirm the exact thread standard, material grade, and pressure class with Zhejiang Wonston Valve Co., Ltd., as these determine compatibility with existing piping and the suitability for the intended medium.

Zhejiang Wonston Valve Co., Ltd. is located at No.568 Hongrui Road in the Shacheng Industry Zone of Longwan District, Wenzhou, Zhejiang Province, China. Wenzhou is one of the most concentrated valve manufacturing clusters in the world, with thousands of foundries and machining shops serving domestic and export markets. The supplier carries an imported tier designation and a harbor trust tier, which indicates a baseline verification level rather than an audited or third-party certified status. The response rate shown is 0.00 percent with an average response time of zero hours, which suggests that no response data is currently being recorded or the supplier has not engaged with recent inquiries through the platform.

The supplier profile does not state a founding year, factory floor area, number of employees, annual revenue, or named clients, and none of these should be assumed. What the listing does indicate is a product focus on industrial-grade threaded ball valves with material options that cover the three most common service requirements: carbon steel for general purpose, 304 stainless for moderate corrosion, and 316 stainless for aggressive media. Buyers should treat the absence of response data as a signal to conduct their own due diligence, including direct communication about quality control steps, material certification, and inspection protocols before placing trial orders.