Abstract: A solenoid valve includes: a valve body; a sleeve which the valve body is accommodated; a solenoid casing connected to the sleeve on a first end side in an axial direction of the solenoid valve, and is closed on a second end side opposed to the first end side in the axial direction; a solenoid molded body in the solenoid casing; a yoke including a tubular portion inside the solenoid molded body, a flange portion projecting radially outward from an end portion of the tubular portion on the second end side; a movable iron core, which moves in the axial direction inside the yoke. The valve body is moved with the iron core by energizing a coil of the solenoid molded body, and the flange portion has an annular outer peripheral surface that is continuous, and is disposed on the second end side of the solenoid molded body.

Abstract: A membrane filtration apparatus is provided in which a hollow fiber membrane element 1 including a water collecting cap 20 having a water collecting port and a groove and being engaged liquid-tightly with a bundle of a hollow fiber membrane is engaged with a frame 60 having supporting beams 65 to be fitted in the grooves. The engagement and the rotation of the hollow fiber membrane element 1 is possible merely by inserting the supporting beams 65 into the grooves formed in the water collecting cap 20.

Abstract: A membrane filtration apparatus is provided in which a hollow fiber membrane element 1 including a water collecting cap 20 having a water collecting port and a groove and being engaged liquid-tightly with a bundle of a hollow fiber membrane is engaged with a frame 60 having supporting beams 65 to be fitted in the grooves. The engagement and the rotation of the hollow fiber membrane element 1 is possible merely by inserting the supporting beams 65 into the grooves formed in the water collecting cap 20.