Needle valves to be inserted in a hot runner panel of an injection moulding machine for the distribution of the molten material to a plurality of dies fastened to the front of a hot runner panel and which are opened by the pressure of the molten material and closed by a spring by the releasing of the pressure. The construction of the valves being so that they as a unity may be easily inserted, removed and adjusted from the backside of the hot runner panel without disassembling the dies from the moulding machine. Further the valve is provided with an adjustable abutment in an enclosed space which will not be contaminated by the molten material to ensure exact position of the needle in its open and closed position.

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