6
Penstock pipes of metal; Valves of metal, included in this class, Except machine parts; Manifolds of metal for pipelines; Tubes of metal
7
Linear actuators; Actuators for dampers; Hydraulic actuators; Actuators for valves; Actuators incorporating a gear mechanism for pipeline valves; Hydraulically operated switches; Process control instruments [hydraulic]; Slide valves (parts of machines); Check valves of metal (parts of machines); Liquid level control valves (parts of machines); Valves, included in this class; Valves; Power operated valves; Hydraulic valves; Clack valves [parts of machines]; Linear actuators [mechanical]; Hydraulic valve actuators; Actuators for valves; System control instruments (Mechanical -); System control instruments (Pneumatic -); Transmission control mechanisms; Pneumatic valve actuators
9
Electric installations for the control of industrial operations; Electric control valves; Electric linear actuators; Electric regulators for valve operators; Flowmeters; Solenoid valves [electromagnetic switches]; Solenoid valves [electromagnetic switches]; Valve operators [electric controls]; Valves (Electric controls for automatically operating -); Electric control apparatus; Remote control apparatus; Flowmeters; Mass flow sensors; Flow control installations [electric]; Remote control apparatus; Process controlling apparatus [electronic]; Process controlling apparatus [electronic]
11
Ball valves; Taps for the control of water flow; Valves for controlling the level of liquid in tanks; Water control valves; Water level control valves; Valves for pipeline; Valves [plumbing fittings]; Float valves [ball cocks]; Water flow dampers for pressure piping systems; Stem flow dampers for pressure piping systems; High-temperature check dampers for regulating water and steam; Needle valves for pipelines; Gate valves for pipelines
37
Installation, maintenance and repair of pipelines, fittings and apparatus for heat engineering and hydropower engineering; Pipeline maintenance; Installation of pipelines; Servicing of pipelines; Construction of pipelines; Installation of tubular linings in pipelines
42
Design of pipelines, fittings and apparatus for heat engineering and hydropower engineering; Design of pipelines; Engineering design; Engineering drawing; Engineering consultancy services; Technical engineering; Conducting technical project studies; Engineering design and consultancy