FOR TRYCKFLUIDUMLEDNINGAR AVSEDD SNABBKOPPLING

PCT No. PCT/SE80/00037 Sec. 371 Date Oct. 8, 1980 Sec. 102(e) Date Sep. 25, 1980 PCT Filed Feb. 6, 1980 PCT Pub. No. WO80/01711 PCT Pub. Date Aug. 21, 1980.A coupling device including a casing part and a nipple part both provided with a flow-through channel. The nipple part is designed to be inserted into the flow-through channel of the casing part to open a spring-loaded shut off valve and thereby open a flow-through path through the coupling. The nipple part is designed to hold the valve and flow through path open and the two main parts connected to each other and is releasably engaged in a ball locking device or similar locking device in the casing part. The valve comprises two cooperating parts, both of which, under the influence of the nipple part, are axially movable in the channel both relative to each other and relative to the channel. One part of the valve is arranged inside a casing-shaped member which moves along a segment of the flow-through channel wall in the casing part to function as a slide valve relative to openings in the wall allowing flow communication through said coupling and allowing pressure evacuation of the interior of the flow-through channel.