3 POSITION AND 4 WAY ROTARY VALVE 34ZS21-25

3 POSITION AND 4 WAY ROTARY VALVE 34ZS21-25
3 POSITION AND 4 WAY ROTARY VALVE 34ZS21-25 is one of the main hydraulic components in the ground BOP control device. The high-pressure oil in the accumulator enters each control object through this valve. At the same time, the opening or closing of the BOP is also realized through the reversal of this valve.
Structure and Features
This valve is mainly composed of rotating shaft, handle, positioning plate, cylindrical pin, valve cover, one-way thrust ball bearing, valve core, retaining ring, valve seat, O-ring, wave spring, valve body, steel ball, spring and other parts. This valve has the following characteristics: The valve core and valve seat are sealed by differential pressure, so the higher the oil pressure, the better the sealing performance and the more reliable the sealing. The wave spring has the initial sealing effect and the self-repairing effect after the valve seat is worn. Equipped with thrust bearing, the turning torque of 34ZS21-25 type rotary valve is small when changing direction, not exceeding 30N·m; the turning torque of 34ZS21-40 type rotary valve when changing direction does not exceed 70N·m. The top of the valve cover is the positioning plate. When the handle is turned, the steel ball enters one of the holes of the positioning plate under the action of the spring, and the cylindrical pins.