美国采购需求：阀门制造商，工业阀门，闸阀，截止阀，止回阀，球阀

I'm currently sourcing 1000 units of dual check valves that are equipped with atmospheric vents. I'm particularly interested in products that offer reliable performance and adhere to the highest safety standards. To ensure compatibility with our applications, it would be great if you could provide details about the materials used, the dimensions, and any relevant certifications. Additionally, I would appreciate any information you have regarding lead times and pricing options for bulk orders. If you have a catalog or technical specifications available, please share those too. Looking forward to your prompt response, as we're keen to move ahead with the procurement process.