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WCB carbon steel forms the main pressure-containing body of the valve. It is used in industrial piping where carbon steel is compatible with the medium, temperature, and pressure conditions.
CF8 is a cast stainless steel grade broadly corresponding to 304 stainless steel. The disc sits in the flow path and contacts the conveyed medium, making its material an important factor in corrosion resistance.
The CF8 disc does not make the entire valve stainless steel. The WCB body and other wetted components retain their own material characteristics and limitations.
The stem axis is offset from the disc sealing surface and pipeline centerline. During opening, the disc moves away from the seat, reducing sliding contact compared with a concentric arrangement.
Less rubbing during disc movement helps limit wear on the sealing surface.
The offset geometry reduces unnecessary contact as the disc opens.
Shutoff depends on seat material, disc condition, operating pressure, and the specified leakage criteria.
The valve is listed with EPDM, NBR, and PTFE seat options. These materials have different chemical and temperature resistance characteristics.
The stated temperature range is −20°C to +180°C, depending on the seat material. This is not a universal operating range for every seat option. Chemical exposure, pressure, temperature variation, and required leakage performance all affect service suitability.
The supplied information does not state a numerical maximum working pressure or a confirmed size range for this exact model. The company's general butterfly-valve production range is DN40–DN1600; this does not establish that every size is available with this specific body and disc combination.
Zhejiang Zhongguan Valve Manufacture Co., Ltd. has focused on valves for more than 19 years, with production bases in Tianjin and Wenzhou. The Tianjin base was established in 2016, followed by the establishment of the Zhejiang company in 2019. Its valve portfolio includes butterfly valves, ball valves, gate valves, check valves, foot valves, strainers, and control valves.
The Wenzhou facility specializes in butterfly valves, including wafer, lug, U-section, and flanged designs. Production equipment includes valve pressure-testing machines, seat-installation tools, shaft-sleeve installation equipment, and marking machines.
Pressure testing and production-stage inspection form part of the manufacturing process. Zhongguan reports holding relevant ISO certificates for its valves and can provide butterfly valves with WRAS-certified seats where applicable. Its international business includes cooperation with companies and engineering projects in Vietnam, Malaysia, Singapore, and other markets. Review our certificates for more detail.
The valve can be installed in either direction for bidirectional sealing, but the preferred orientation is with the stem upstream for better flow characteristics. Confirm the arrow on the body matches the intended flow path before bolting.
Inspect the seat for swelling, cracking, or embedded particles during scheduled shutdowns. Replace the seat if leakage occurs or if the disc no longer seats properly. Keep the stem and disc contact area free of abrasive debris.
Yes. The valve can be supplied with a mounting interface for manual, pneumatic, or electric actuators. The actuator torque must match the valve size, pressure differential, and required safety factor.
Match the valve DN to the pipeline inner diameter and confirm the flange rating (PN10 or PN16) matches the mating flanges. Consider flow velocity, pressure drop, and the required shutoff class for the application.
Store the valve in a dry, clean area with the disc slightly open to protect the seat. Keep flange faces covered and avoid stacking heavy items on the valve. Inspect the seat and disc before installation.
Address
No. 838, Oubei Avenue, Yongjia County, Wenzhou City, Zhejiang Province, China
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