GATE VALVE FOR OUTBOARD SHIP NAVIGATIONAL INSTRUMENTS

摘要

FIELD: installation of outboard ship navigational instruments ( logs, echo sounders ) with their possible replacement without docking of ship. SUBSTANCE: hollow case of gate valve is split along height. Lower part of it installed on bottom of ship houses sealing device. Upper separable part of case houses shut-off device. Separable part with shut-off device is used only during removal and installation of outboard instruments and is not subject to attack of sea water. EFFECT: increased operational reliability of gate valve and usage of cheaper materials. 1 dwg0