南非采购需求：PVC球阀、PVC底阀、PVC接头、PVC单接头球阀、PVC双接头球阀、PVC管件

I'm looking to source several essential components for our operations. Specifically, I need a batch of valve balls for various applications, including air intake and multiple wagon types. I'm also interested in several types of safety valves, both relief and non-return, as well as butterfly valves suitable for cement and water. In addition to the above items, I require dome rubber seals and bolted valves with specific diameters. All components should meet industry standards for quality and reliability. Please provide me with your best pricing, availability, and lead times for these items. Thank you!