API Spec 11V1 (R2008) PDF

Covers the design,manufacture, and testing of gas lift valves, reverse flow (check) valves, orifice valves, dummy valves and the WRVM's used as a receiver for those valves or other devices used to enhance oil well production or treat oil or gas wells. This specification was formulated to provide consistently manufactured equipment to a predictable level of quality. Technical content includes requirements for materials, tests and inspecting, welding, marking, storing, and shipping. This specification is intended as a quality-based specification and does not assure dimensional interchangeability between manufacturers.