Electrofusion welding is the name given to resistive implant welding of thermoplastic pipes. It is one of two main techniques used for the joining of polyethylene gas and water pipes. Electrofusion welding employs fittings that are placed around the joint to be welded. Metal coils are implanted into the fittings, and electric current is run through the coils to generate heat and melt part of the pipes, forming a joint upon solidification. There are two possible fittings used in electro fusion welding: couplers and tapping tees (electrofusion saddles). Electrofusion Machines/Electrofusion Welders are used for electrofusion fittings welding. Electrofusion Fittings are a heat treatment method compared to butt fusion methods and are used to generate heat. Electrofusion welding is a type of pipe welding and polyethylene fittings, in which there are special connections that have electrical resistance wire to create welding melting temperatures. The electric current is transmitted through the electrofusion welding eequipment and through the control box to the two ends of the connection. Yuda offers a fulll range of EF315 HDPE Electrofusion Welders, EF500 poly pipe electrofusion welding machine, EF630 HDPE Fitting Electrofusion Equipments and EF800 Electrofusion hdpe fittings machines Electrofusion Machine,Electrofusion Equipment,Electrofusion Welding Machine,Electric Fusion Welding Machine WUXI MEIERTE MACHINERY TECHNOLOGY CO.,LTD , https://www.wxpipefusionweldings.com
I. Series of ball valve
Ball valve has two types of structure, which of split body and three-piece body. Besides small fluid resistance, fast opening and closing, simple structure, has the following features:
  1. Ball valve with FEP lining has high chemical stability, can be applicable far any strong corrosive medium except molten alkali metal and fluorene.
  2. The structure of full bore, floating ball can class under full pressure without leakage- is also convenient for pipeline pigging and pipeline maintenance
  3. Compact structure and smallest space of valve cavity reduced medium retention. In addition, special molding process make the sealing face has good sealing, plus the PTFE packing, the valve can realize no leakage.
  4. Structure of split body and three-piece body could be applicable for pipeline system of any requirements and services, in which valve of three-piece body allows main valve body to separate from valve body of two sides: can realize quick replacement and maintenance on site.
II. Design specification
As per standard of GB 12237/ API 608/API 6D
III. Drive made
Manual. worm gear, pneumatic, hydraulic
Working Pressure:CLASS 100~CLASS 4500
Nominal Bore diameter: 1/2"~ 46"
Temperature Class: -46°C~121°C(LU)
Product Specification Level: 1~4
Performance Requirement: PR1~2
Material Class:AA~HH
 Working Medium: oil,natural gas,mud and gas containing H2S,CO2
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API Good Quality 6D Ball Valve
Model NO.: API 6D
HS Code: 8481804090
Ball valve uses a ball with circular hole as opening and closing device; ball rotate around center line of valve body with stem, so as to open and close valve.