Mining operations refer to the extraction of minerals, or other non-renewable resources from underneath the earth’s surface. This can include metals, coal, oil, gemstones, and more. Mining operation conditions can be harsh, due to rugged conditions and sometimes volatile materials. That’s why Proco Products, Inc. designs the most durable check valves and expansion joints with a variety of construction materials available. Proco operates worldwide, and maintains one of the largest product inventories in North America.