南非采购需求：中国球阀厂，中国蝶阀制造商，弹性阀座闸阀，铸铁篮式过滤器，橡胶膨胀节，球形止回阀

I'm looking for a 300mm free flow slurry ball check valve for our upcoming project. It's essential that the valve can handle high flow rates and provide reliable performance in challenging conditions. Please let me know the specifications, availability, and lead times for this product. Additionally, I'd appreciate it if you could share information on pricing and any volume discounts available, as we might purchase in larger quantities depending on our needs. Looking forward to your prompt response so we can move forward quickly!