Remanufactured Drilling Check Valves

Petroleum Oil Tools maintains stock of anti-backflow drilling check valves, also known as one-way check valves or safety release valves. Our remanufactured drilling check valves meet or exceed API 6A specifications for quality.

Also see "Gate Valves" here

*API Specification 6A and 16A specifies requirements and gives recommendations for the performance, dimensional and functional interchangeability, design, materials, testing, inspection, welding, marking, handling, storing, shipment and purchasing, of drilling equipment for use in the petroleum and natural gas industries.