Valve

A method comprising:

• using a valve as one of:
• a homogenization valve, a hydraulic shut-off valve, a hydraulic pressure reducing valve, and a hydraulic throttle valve, wherein the valve includes:
• a housing;
• a valve body having a fluid inlet and a fluid outlet, the valve body comprising a first valve element and a second valve element arranged in said housing;
• a gap being formed between the valve elements, the first valve element is conformed as a sleeve with an inner surface that tapers at least in sections towards the fluid outlet, and the second valve element is conformed as a cone mounted in the sleeve, with the same inclination as the inner surface of the sleeve so as to form the gap, said cone having a central, axially extending channel open to the fluid inlet;
• and
• an annular space open to the fluid outlet is formed between the sleeve and the inner surface of the housing,
• the sleeve has through holes towards the annular space and the cone has through openings towards the fluid inlet, and the sleeve and the cone are axially adjustable relative to one another,
• wherein the fluid outlet is provided concentrically and separately from the channel in the cone.