Valve assembly

A valve assembly, comprising:

• a valve housing body extending along a longitudinal axis X between a first end and a second end and defining a cylindrical passage therethough from the first to the second end;
• a fluid inlet at the first end for receiving a pressurized fluid;
• and
• a fluid outlet provided in between the first and second end of the housing body;
• and
• a piston provided in said cylindrical passage, said piston being axially movable between a first position wherein said fluid outlet is blocked by said piston such that the piston blocks the flow of fluid from the inlet to the outlet, and a second position wherein said outlet is not blocked by said piston and a fluid flow path is formed from the inlet to the outlet;
• and wherein said valve assembly further comprises a helical guide groove formed in the cylindrical passage and the piston comprises radially extending guide pins configured to engage in the helical guide groove such that as the piston moves axially from the first position, the guide pins travel along the helical guide groove to cause rotation of the piston relative to the housing body, and
• the valve assembly further comprising a circumferential groove at an end of the helical guide grooves such that the guide pins travel from the helical guide grooves into the circumferential groove, wherein when piston is in the second position the guide pins rotate around the circumferential groove.