Your Leading Butterfly Valve Manufacturer in China
JiangHeng butterfly valves are mainly used in oil, natural gas, gas and other media more important pipelines. In the general pipe network, especially in the thermal pipe network of water system application, all-welded ball valves are the majority, but the all-welded ball valve products are huge, the structure length is long, and the weight of the solid ball is heavier, and the pipeline has to bear the gravity load of almost the entire valve, and the price and cost are high. Given this working condition, our company has developed and designed a triple eccentric conical metal sealed butterfly valve in combination with foreign advanced technology. The butterfly valve has superior structural performance and sealing performance, which has the practical advantages of two-way sealing, adjustable and long life of the ball valve, and the structural advantages of small size and light weight of the butterfly valve.
JiangHeng butterfly valve uses the sealing principle of triple eccentric conical seal, to achieve high and low pressure two-way shut-off. Stainless steel material with high hardness is selected on the sealing surface of the butterfly plate, and the metal sealing seat is STL cemented carbide surfacing for the body, which improves the wear resistance and service life of the sealing surface. Its three-eccentric structure enables the sealing surface to be automatically aligned to the center (self-adaptive), automatic overshoot to compensate for wear, automatic application of extremely high sealing specific pressure, and frictionless between sealing pairs when closing and opening instantaneously. Due to its installation, maintenance and repair, reliable operation and a series of advantages, it will become a major technological revolution in the valve industry.
The Core Secret of JH Butterfly Valve
Triple Eccentric / Double Eccentric Structure & Zero Leakage Operation
- Disassembling the Internal Structure: Watch the high-definition exploded view to see the unique design essence of Jiangheng triple eccentric butterfly valve / double eccentric butterfly valve.
- Understand the Operation Principle: Intuitive animation demonstration clearly shows how the valve opens and closes to achieve hard seal and zero leakage.
- Standards Integrated into Details: Every design and every action strictly complies with API, EN, ISO international standards to ensure excellent and stable performance.
- Quality Visualization: The engineering art of seeing is believing, interpreting Jiang Heng’s persistent pursuit of “strict execution” and “0 leakage commitment”. Click to play and explore the precision engineering and reliable guarantee of Jiangheng Butterfly Valve!
JH DN4000: Designed for ultra-large piping systems, demonstrating extraordinary engineering capabilities.
Core Technology Guarantee: The use of advanced triple eccentric / double eccentric structure and hard sealing technology ensures that such a huge valve can also achieve absolute 0 leakage.
Standard Weight: From design, material selection to manufacturing and testing, we strictly implement stringent international standards such as API 609, EN 593, ISO 5752 to create indestructible reliability.
Born for Critical Tasks: Applied in large-scale water conservancy, energy, chemical industry and other fields, it is a reliable solution for fluid control under harsh working conditions.
FAQ—Industrial Butterfly Valve
The butterfly valve controls the flow of the medium by rotating the disc-shaped valve plate (valve disc). It can be fully opened or fully closed by rotating 90°. It has the characteristics of compact structure, fast opening and closing, and low cost . It is suitable for large-diameter, low-pressure pipeline systems in water treatment, heating, ventilation and air conditioning (HVAC), chemical, food and beverage and other industries.
Core Differences:
- Structure : The butterfly valve disc is a thin disc, and the ball valve is a sphere with holes;
- Sealing : Ball valves have tighter sealing (suitable for high pressure), while butterfly valves are suitable for low pressure or where slight leakage is allowed;
- Cost : Butterfly valves are cheaper, especially in large-diameter (DN300 and above) pipelines, where they are more cost-effective.
Common types:
- Structural classification : center line butterfly valve (general type), double eccentric butterfly valve (wear-resistant), triple eccentric butterfly valve (high pressure and high temperature);
- Connection mode : wafer type (space saving), flange type (high pressure seal), lug type (frequent disassembly);
- Sealing materials: rubber (EPDM/NBR), PTFE (corrosion resistant), metal seal (high temperature conditions).
Selection suggestion : Select according to pressure level (such as Class 150/300), medium temperature and corrosiveness.
Centerline butterfly valves can be installed in both directions, but double/triple eccentric butterfly valves must be installed strictly according to the medium flow direction marked on the valve body (usually the valve plate rotation direction is consistent with the flow direction). Reverse installation will cause seal failure or valve plate wear.
High temperature butterfly valve (≤600℃) material selection points:
- Valve body/valve plate : stainless steel (CF8M) or chrome-molybdenum steel (WC6);
- Valve seat seal : metal seal (stainless steel + graphite gasket) or high temperature PTFE;
- Valve stem : 17-4PH stainless steel, resistant to high temperature deformation.
Leakage causes and countermeasures:
- Valve seat aging : replace EPDM or PTFE valve seat;
- Valve plate deviation : adjust the connecting bolts between the valve stem and the valve plate to calibrate the concentricity;
- Sealing surface wear : The metal sealing ring of the triple eccentric butterfly valve needs to be ground or replaced.
Yes, but please note:
- It is only recommended to adjust the valve opening within the range of 15°~75° to avoid high-speed fluid erosion of the valve plate at small openings;
- Choose a butterfly valve with linear flow characteristics (such as equal percentage valve plate design) to improve regulation accuracy.
Maintenance points:
- Regular lubrication : Fill the valve stem bearing with food-grade grease every 6 months (such as in the food industry);
- Clean the valve cavity : flush out impurities in the pipeline when the machine is shut down to prevent the valve plate from getting stuck;
- Check the seal : Perform a low-pressure gas seal test (0.6MPa nitrogen) once a year.
Design key:
- Reinforced rib structure : ribs are added to the valve body to prevent deformation;
- Segmented valve stem : reduces the torque of large-diameter valve disc;
- Gearbox drive : replaces the handwheel and reduces the opening and closing torque (such as DN1000 and above with turbine box).
Core Certification:
- API 609 : Butterfly valve standard for petroleum and natural gas industry;
- ISO 10631 : Specification for general industrial butterfly valves;
- FDA certification : food grade rubber valve seat (such as EPDM);
- EN 593 : European industrial butterfly valve performance test standard.