X-mas tree valves and wellhead equipment are used in the process of sealing a wellhead and in other processes related to wellhead control. Wellhead equipment is comprised of knife gate valves, throttle valves, pressure gauges, etc.
X-mas tree valves are constructed with DN 65, 80, 100, 150 mm. They can withstand pressure up to 1,000 kgf/cm2 (15,000 psi). There are three versions of valves according to their corrosion resistance (К1, К2, К3) and two classes according to material applied (AA, DD). They are used for such media as oil, gas and gas condensate containing up to 25 mg/l of particulate matter and up to 6% of CO2 and H2S. X-mas tree valves can be constructed in accordance with API standards.