1. Design and manufacture according to: API 600, ASME B16.10
2. Connection ends according to:
a) flange connection according to ASME B16.5 ;
b) butt weld according to ASME B16.25 ;
3. Test and inspection according to: API 598.
4. Structure features: B.B, PSB; OS&Y
5. Material conform to : ANSI/ASTM
6. Main Material: WCB, CF8M, CF3M, CN7M, CW12MW, CW6MC, CY40, CR20, etc.
Our 6-inch Cast Steel Gate Valve is engineered for superior performance and long-term reliability in demanding industrial environments. Constructed from high-grade WCB Carbon Steel (CS), this valve is built to handle high-pressure applications up to 300lb. It features a robust Raised Face (RF) Flange design for a secure and leak-free connection to your piping system.
This valve complies with the stringent API 600 standard, ensuring quality and durability. The Outside Screw and Yoke (OS&Y) design provides a clear visual indication of the valve’s open or closed position and keeps the stem threads isolated from the flow medium, reducing corrosion and wear. Equipped with a resilient seated seal, it guarantees tight shut-off and enhanced sealing performance. As an all-metal, resilient seated gate valve (RSV), it offers an optimal balance of strength and sealing efficiency.
As a leading China manufacturer, we are committed to delivering high-quality valve solutions that meet global standards. This Cast Steel RF Flange WCB 300lb Gate Valve is the trusted choice for engineers seeking a dependable 6-inch valve for critical shut-off applications.
| Brand | SFAN VALVE OR "OEM" |
|---|---|
| Flow bore | Standard bore |
| Material | Carbon steel, Stainless steel, Alloy steel or other |
| Dimension | DN50(2") to DN1200(48") |
| Class | 150~2500 |
| Medium | Water, oil &gas. |
| Temperature | -196℃(cryogenic design) to 700℃ |
| Valve test | 100% quantity tested before delivery |
| Valve guarantee | 18 months after shipments and 12 months after installed |
| Packing | Plywood or carton cases |
| Delivery time | 7 days to 30 days |
| Place of Origin | Zhejiang, China |





Your questions answered
For Sfanvalve’s standard products, we are willing to start production without any payment in advance. We accept product inspection upon completion, and payment is only due once the inspection is passed. SFAN will then arrange shipment to your designated warehouse as per your requirements.
Yes. After receiving the contract, we will provide technical drawings. Production will commence based on these drawings once they are confirmed by both parties.
After receiving the contract and confirming the drawings, we will provide a production schedule and manufacture strictly according to it. We will provide photos or videos to share and make a record for every stage of the production process. If a serious delay occurs due to management error, we will arrange air shipment and bear all costs by air.”
The warranty period is 18 months from the date of shipment or 12 months from the date of installation, whichever occurs first.