Description

PRESSURIZATION OF THE SHEET IS CARRIED OUT BY MEANS OF SPECIAL HEAT-TREATED GUIDE PINS AND BALLS.

IT IS MAINLY USED FOR SMALL PIPE DIAMETERS AND IS CHARACTERIZED BY ITS COMPACTNESS AND LIGHTNESS COMPARED TO OTHER TYPES.

THE SEATS ARE PRESSURIZED BY GEARS OR MOTORS, AND THE BLINDS ARE OPENED AND CLOSED MANUALLY.

DUE TO ITS CHARACTERISTICS, IT IS MAINLY USED IN AREAS WITH LOW PRESSURE AND EASY ACCESS FOR PERSONNEL.