... RP 14C , NACEMR-01-75. 1. Control objectsThe single well control panel is applicable of the control of the wellhead safety valves of ... the single independent oil and gas well and controls the SCSSV, master valve, wing valve ... choke valve.2. Reference standards API RP 14A , API RP 14B , API RP 14C , NACEMR-01-75. 3. Basic parameters TypePneumatic control ...