Qingdao Fluido Industrial Co. Ltd.

DN-nominal diameter. De- outer diameter. D- inner diameter. d-concrete pipe diameter. Φ- diameter of normal circle.

Flange Spigots are frequently used in water supply, sewage, irrigation, and industrial piping systems.

As the core sealing component of flange connection, flange gaskets prevents medium leakage and resisting high temperature and high pressure environment.

DN refers to the nominal diameter, a dimensionless number indicating the size of the flange, while PN indicates the pressure rating, representing the maximum allowable pressure at a specific temperature.

Common Butt weld fittings types include elbows, tees, reducers, and caps, with materials like carbon steel, alloy steel, and stainless steel often used. 

A pipe coupling, also known as a coupler, is a short pipe fitting used to connect two pipes together, either to extend a pipeline, change its size, or repair a leak. 

A non-return valve lets the fluid flow in one direction. When fluid in the line reverses direction and begins to flow back the way it came, a check valve serves to stop or prevent the backflow by allowing flow in one direction.

Valves are essential components in fluid systems, offering control over flow direction, pressure, and volume. They can be broadly categorized into manual, actuated, and automatic types, each with various subtypes. Selection depends on factors like fluid type, pressure, temperature, flow requirements, and desired actuation method.