SD341XType pn6-pn10 flange expansion butterfly valve has the function of automatic compensation for thermal expansion and cold contraction of pipeline, and is convenient for loading and unloading. It is used in industrial pipelines of petroleum, chemical, electric power, papermaking, water supply and drainage, municipal construction and other industrial pipelines with temperature below 425 ℃ and nominal pressure below 1.6Mpa.

1. It has unique structure, flexible design, light weight, labor saving and quick opening and closing; 2. The telescopic butterfly valve can not only compensate the function of thermal expansion and cold contraction caused by pipeline temperature difference contraction, but also provide convenience for the installation and replacement of maintenance valve; 3. The sealing part can be adjusted and replaced, and the sealing performance is reliable;

SD341XPerformance parameters of pn6 ～ PN10 type flange telescopic butterfly valve

model		SD341X-6	SD341X-6Q	SD341X-10	SD341X-10Q
working pressure（MPa）		0.6		1.0
Applicable temperature（℃）		≤120		It depends on different gum types	≤120
Applicable media		Water, sewage, oil, air, etc		It depends on different gum types	Water, sewage, oil, air, etc
Material Science	valve body	Gray cast iron		Gray cast iron	Ductile iron
	valve body	Ductile iron (surface treatment)		Ductile iron, stainless steel	Ductile iron
	Stem	2Cr13		Stainless steel, carbon steel	Chromium stainless steel

尺寸图

The telescopic butterfly valve must be placed horizontally before installation, and it is strictly forbidden to remove the bracket during operation. The structural length of the telescopic butterfly valve is Zui small when it is delivered from the factory. When installing, it should be pulled to the installation length (i.e. the design length). When the length between the pipes exceeds the installation length of the expansion valve, please adjust the pipe spacing. Do not stretch the butterfly valve forcibly to avoid damaging the butterfly valve. The telescopic butterfly valve can be installed at any time. When the temperature compensation is used, supports should be added at both ends along the pipeline axis direction after the pipeline installation is completed to prevent the expansion pipe of the expansion valve from pulling out.