Common valve connection methods include: flange connection, wafer connection, butt welding connection, threaded connection, ferrule connection, clamp connection, self-sealing connection and other connection forms.
First, flange connection:
The valve body has flanges at both ends, corresponding to the flanges on the pipeline, and is installed in the pipeline by bolting the flanges. Flange connection is the most used connection form in valves. Flanges are divided into raised surface (RF), flat surface (FF), convex and concave surface (MF) and so on. According to the shape of the joint surface, it can be divided into the following types:
1. Smooth type: It is used for valves with low pressure, and it is more convenient to process.
2. Concave-convex type: The working pressure is high, and medium-hard washers can be used.
3. Tongue and groove type: gaskets with larger plastic deformation can be used, which are widely used in corrosive media and have better sealing effect.
4. Trapezoidal groove type: use an oval metal ring as a gasket, which is used for valves with a working pressure of ≥64 kg/cm², or high temperature valves.
5. Lens type: The gasket is in the shape of a lens and is made of metal. Used for high pressure valves with working pressure ≥100 kg/cm², or high temperature valves.
6, O-ring type: This is a newer flange connection form, which is developed with the emergence of various rubber O-rings, and its sealing effect is more reliable than ordinary flat washers.
Second, the clip connection
The valve is installed between two flanges. There are usually positioning holes on the valve body to facilitate installation and positioning. The valve and the two pipes are directly clamped together with bolts.
Welded connection
1. Butt welding connection: The two ends of the valve body are processed into butt welding grooves according to the butt welding requirements, which correspond to the welding grooves of the pipeline, and are fixed on the pipeline by welding.
2. Socket welding connection: Both ends of the valve body are processed according to the requirements of socket welding, and are connected with the pipeline by socket welding.
The main products of Huatai Valve Manufacturing Co., Ltd. are: titanium and titanium alloy series valves, nickel and nickel alloy series valves (Monel alloy, Hastelloy B, Hastelloy C, No. 20 alloy, dual-phase steel) and zirconium metal, etc. valve.
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