Abstract: A ball valve supporter is fixedly attached to an internal wall of a bore formed in an end plug of a fluid pressure control device. The valve supporter lacks an aperture which penetrates the supporter and opens into a ball valve chamber from the supporter at a portion confronting the ball valve. The valve supporter is formed outside the portion confronting the ball valve with passage means opening into the ball valve chamber.

Abstract: In a braking fluid pressure control device, a push rod engages against a blind end of a bore extending inwardly and axially with respect to a plunger. Between the plunger and the push rod, the bore provides clearance increasing from the blind end of the bore toward an open end thereof. The push rod projects from the open end of the bore outside the plunger and engages against a plunger seat slidably fitted in a housing bore. The push rod is biased by a spring which is compressed between the plunger seat and a piston. As a result, a radial force is prevented from acting on the plunger as the plunger is urged by the piston. This avoids damage to an inner wall by the plunger increasing the durability of the control device.