ROC Carbon Company is a manufacturer of bushings/bearings for use in all vertical and horizontal pumps. Offerings include Valve stem bushings and High temperature ball valve seats. ROC also manufactures Mechanical Seal faces for most OEM mechanical seal housings. All grades of carbon/graphite raw material are available including metal impregnated grades and seal grades. Custom and water-jet machining services are available as well. ROC has been manufacturing in Houston, Texas for 60 years. ISO 9001:2015 Certified.