Valve, especially a thermostatic expansion valve

A thermostatic expansion valve having a housing with an inlet and an outlet, a valve seat interposed between the inlet and outlet, a closure member that is movable by a force of a working element against the combination of a force of a setpoint spring and fluid pressure in the housing, said setpoint spring being supported by an axially guided plate with a sloping face, and further having a setpoint spring adjusting device housed in a lateral connecting tube that is attached to said housing, said setpoint spring adjusting device comprising a pressure-applying piece with means to secure against rotation and having a contact face and an adjusting screw with means to secure against displacement, said contact face engaging said sloping face of said axially guided plate, said pressure applying piece having a threaded bore wherein a shank of the adjusting screw is engaged, the rotation of the adjusting screw causing the axial movement of the pressure-applying piece radially relative to a central axis of the guided plate and resulting in adjustment of the setpoint spring.