11 Water control valves for use in the oil, gas, chemical, water supply, nuclear and petrochemical industries; level control valves for use in the oil, gas, chemical, water supply, nuclear and petrochemical industries; pressure controllers being regulators for gas pipes, water pipes and steam pipes; pressure relief apparatus forming part of water and steam supply systems; pressure relief apparatus for use with gas and steam installations; flow control and regulating apparatus and instruments, namely, valves for use in the oil, gas, chemical, water supply, nuclear and petrochemical industries for regulating fluid, liquid or gas flow including water, steam, petroleum and petrochemicals; flow control and regulating apparatus and instruments, namely, steam valves for regulating a supply of steam; flow control and regulating apparatus and instruments, namely, safety valves for use in the oil, gas, chemical, water supply, nuclear and petrochemical industries for fluid, liquid or gas apparatus including apparatus for use in water, steam, petroleum and petrochemical applications; flow control and regulating apparatus and instruments, namely, for liquid or gas installations for controlling the flow of gases, fluids, liquids or steam; parts and fittings for all the aforesaid goods; pressure relief valves being safety apparatus for water apparatus and gas apparatus, namely, shut off valves preventing inadmissible overpressure in pipe systems, pressure vessels and boilers; safety valves for water apparatus, namely, shut off valves preventing inadmissible overpressure in pipe systems, pressure vessels and boilers; safety valves for gas apparatus, namely, shut off valves preventing inadmissible overpressure in pipe systems, pressure vessels and boilers; all of the foregoing goods for use in heating and cooling installations within the nuclear, oil, gas, chemical, and petrochemical industries or for use in heating and cooling installations within power plants