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.
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  API 6A
III. Drive made
Manual. worm gear, pneumatic, hydraulic
Working Pressure: 2,000 psi~20000 psi
Nominal Bore diameter: 2 1/16"~ 13- 5/8"
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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There are many grades of PVC. The viscosity or K value commonly used in the industry indicates the average molecular weight (or average degree of polymerization) of PVC, that is, the length of the PVC molecular chain, which determines the grade of the resin and the corresponding processing parameters. The molecular weight of the resin is related to the physical and mechanical properties of the product.
PVC Resin is a kind of non-crystalline linear polymer compound. The larger the relative molecular mass, the higher the viscosity, the higher the molecular weight, and the higher the tensile strength, impact strength, and elastic modulus of the product, but the flow of the resin melt Decline in sex and plasticity. The viscosity number is usually used to indicate the molecular weight of the polymer, and the polymer model is divided
PVC used to be the largest general-purpose plastic in the world, and it is widely used. It is widely used in construction materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foam materials, sealing materials, fibers, etc
SG3 (K-70, S1300): mostly used for soft products, hoses, wires and cables, films, shoe materials, toys, auto parts etc.
PVC RESIN SG3 has high purity, less fish eyes, easy to blister, high temperature resistance, insulation, soft product texture, etc. It is mainly used to produce soft products such as wires and cables, agricultural films, conveyor belts, and daily plastic products.
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