Keystone is part of Pentair and built its reputation on providing industrial process butterfly valves, which are known for their reliability, long service life, and reduced operating costs. Keystone products are used in the oil and gas, chemical, petrochemical, food and beverage and power generation industries. Pentair is one of the world’s leading manufacturers and marketers of valves, actuators and controls, providing market-leading products, services and solutions, for the oil and gas, power, mining, chemical, food and beverage and building and construction industries.