CONTROL VALVE Russian patent published in 2007 - IPC F16K17/04 

FIELD: valving systems.

SUBSTANCE: control valve comprises housing with inlet and outlet openings and valving member connected with the rod and is made of a spiral flexible member. The spiral member is made of a tension spring made of a shaped article whose surface is made of a Z-shaped sealing surface. The spiral member is mounted for permitting axial movement inside the axial opening in the seat-bushing. The seat-bushing is perforated with at least one shaped opening and is provided with sealing coating mounted on the sealing surfaces that are in a contact with the spiral member and housing. The spiral member is provided with sealing coating applied on the sealing surfaces of the turns of the spiral member. The seat-bushing and spiral member are made of a corrosion protection material.

EFFECT: simplified design and expanded functional capabilities.

4 dwg