make capital expenditures to enhance our compliance with environmental requirements, as well as to abate and control pollution. At present, we have no plans for any material capital expenditures for environmental control equipment at any of our facilities. However, we have incurred and continue to incur operating costs relating to ongoing environmental compliance matters. Based on existing and proposed environmental requirements and our anticipated production schedule, we believe that future environmental compliance expenditures will not have a material adverse effect on our financial condition, results of operations or cash flows. 

We use hazardous substances and generate hazardous wastes in many of our manufacturing and foundry operations. Most of our current and former properties are or have been used for industrial purposes and some may require clean-up of historical contamination. During the due diligence phase of our acquisitions, we conduct environmental site assessments to identify potential environmental liabilities and required clean-up measures. We are currently conducting follow-up investigation and/or remediation activities at those locations where we have known environmental concerns. We have cleaned up a majority of the sites with known historical contamination and are addressing the remaining identified issues. 

Over the years, we have been involved as one of many potentially responsible parties ("PRP") at former public waste disposal sites that are or were subject to investigation and remediation. We are currently involved as a PRP at five Superfund sites. The sites are in various stages of evaluation by government authorities. Our total projected "fair share" cost allocation at these five sites is expected to be immaterial. See "Item 3. Legal Proceedings" included in this Annual Report for more information. 

We have established reserves that we currently believe to be adequate to cover our currently identified on-site and off-site environmental liabilities. 

## Exports 

Our export sales from the U.S. to foreign unaffiliated customers were $300.9 million in 2019, $234.3 million in 2018 and $258.3 million in 2017. 

Licenses are required from U.S. and other government agencies to export certain products. In particular, products with nuclear power generation and/or military applications are restricted, as are certain other pump, valve and seal products. 

## BUSINESS SEGMENTS 

In addition to the business segment information presented below, Note 18 to our consolidated financial statements in Item 8 of this Annual Report contains additional financial information about our business segments and geographic areas in which we have conducted business in 2019, 2018 and 2017. 

## FLOWSERVE PUMP DIVISION 

Our largest business segment is FPD, through which we design, manufacture, pre-test, distribute and service specialty and highly-engineered custom and pre-configured pumps and pump systems, mechanical seals, auxiliary systems, replacement parts and upgrades and related aftermarket services. FPD also manufactures replacement pumps and upgrades and provides a full array of replacement parts, repair and support services (collectively referred to as "aftermarket"). FPD products and services are primarily used by companies that operate in the oil and gas, petrochemical, chemical, power generation, water management and general industries. We market our pump and mechanical seal products through our global sales force and our regional QRCs and service and repair centers or through independent distributors and sales representatives. A portion of our mechanical seal products are sold directly to other original equipment manufacturers for incorporation into their rotating equipment requiring mechanical seals. 

Our pump products are manufactured in a wide range of metal alloys and with a variety of configurations to reliably meet the operating requirements of our customers. Mechanical seals are critical to the reliable operation of rotating equipment in that they prevent leakage and emissions of hazardous substances from the rotating equipment and reduce shaft wear on the equipment caused by the use of non-mechanical seals. We also manufacture a gas-lubricated mechanical seal that is used in high-speed compressors for gas pipelines and in the oil and gas production and process markets. Our products are currently manufactured in 39 manufacturing facilities worldwide, 13 of which are located in Europe, 12 in North America, eight in Asia Pacific and six in Latin America, and we have 144 QRCs, including those co-located in manufacturing facilities and/or shared with FCD. 

We also conduct business through strategic foreign joint ventures. We have six unconsolidated joint ventures that are located in Chile, China, India, Saudi Arabia, South Korea and the United Arab Emirates, where a portion of our products are 

