Pp ventilation fitting - variable diameter.

The PP change diameter is also large small head, reducing pipe, different straight. One of the chemical pipe fittings used for two different pipe diameters. It is divided into two types: concentric small head and eccentric size. PP variable diameter is also known as PP flange reducer, PP flange size head.
Features:
1. PP size head (reducer) is a kind of pipe fitting used for pipe diameter. The commonly used forming process is the reduction of the diameter, the expansion of the diameter or the reduction of the diameter of the diameter, and some specifications of the reducer can also be used for stamping.
2. The diameter forming process of the size head shall be placed into the forming die by the same tube blank with the same diameter as the large end of the head, and the metal will move along the mold cavity and shrink the shape by pressing down the axial direction of the tube. According to the size of the diameter of the reducer, it can be divided into one pressing forming or multiple pressing.