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 for detailed information about belt valves for an upcoming project. Specifically, I need insights on your product specifications, including materials used, pressure ratings, and dimensions. Additionally, please share any available options regarding customization, as our requirements might vary based on application needs. It would also be helpful to know the lead times for manufacturing and shipping, as well as any bulk order discounts you offer. If you have recent catalogs or datasheets, including compatibility information, please send them along. Your prompt response would be greatly appreciated to keep our timeline on track. Thanks!