Part I: General Introduction

Ductile iron manual flanged soft seal butterfly valve adopts the centre line design. The valve is mainly composed of valve body, valve plate, valve seat, valve stem and transmission operating mechanism and other parts. It can be widely used in water supply and drainage, HVAC and fire fighting systems and other fluid pipelines as a regulating or intercepting device. The opening and closing parts of butterfly valve is a disc-shaped butterfly plate, rotating around its own axis in the valve body, so as to achieve the purpose of opening and closing or regulation. Advantages include simple structure, small size, light weight, rapid switching.

Part II: Ductile iron manual flanged soft seal butterfly valve technical parameters

Part III: cast iron manual flange soft seal butterfly valve production process

Butterfly valve parts processing: first of all, the inspection of the butterfly valve body castings, processing, grinding, spraying after inspection; and then the processing of other parts, such as valve stems, valve plates and so on;

Butterfly valve assembly, for the installation of processed parts. Firstly, install the valve seat and valve body; then install the valve stem seals, valve plate and valve stem.

Butterfly valve pressure test, for the installation of the butterfly valve to carry out the last step of pressure test, no leakage and other problems, butterfly valve manufacturing is completed!

Part IV: cast iron manual flanged soft seal butterfly valve parts materials

1. Ductile iron valve body.

Ductile iron has the advantages of high strength, good toughness, wear resistance, vibration damping and so on. Production costs are relatively low, which is conducive to reducing the manufacturing cost of the valve. Good processing performance, easy to manufacture complex valve structure.

2. NBR/EPDM/PTFE valve seat;

NBR: Nitrile rubber is a copolymer made by polymerisation of acrylonitrile and butadiene monomers, mainly produced by low temperature emulsion polymerisation method, with excellent oil resistance, high abrasion resistance, good heat resistance and strong adhesive force

EPDM: EPDM is basically a saturated polymer, very good aging resistance, good weather resistance, excellent electrical insulation properties, good chemical resistance, good impact elasticity.

PTFE: Polytetrafluoroethylene is commonly known as the king of plastics, is the world’s best engineering plastics, PTFE has excellent chemical stability, corrosion resistance, sealing, self-lubricating non-stick, electrical insulation and good anti-aging ability.

Part V: cast iron manual flanged soft seal butterfly valve applications

1、Petrochemical industry: cast iron butterfly valve is widely used in the petrochemical industry to connect and cut off the pipeline system, due to its good sealing performance and corrosion resistance, cast iron butterfly valve can effectively prevent fluid leakage and equipment corrosion.

2, water treatment: in the process of water treatment, cast iron butterfly valve can be used to regulate the size and direction of the water flow to ensure that the water quality to meet the standards, cast iron butterfly valve can also be used for the discharge of sewage and recycling water resources.

3、Construction industry: In the construction industry, cast iron butterfly valves are widely used in water supply, drainage and ventilation systems, due to its simple structure, easy to install, cast iron butterfly valves have become one of the commonly used valves in the construction industry.

Part VI：Our Advantages