A cast iron ball valve primarily consists of the following components:
- Body: Made of gray cast iron (HT200/HT250) or ductile iron (QT450-10), providing pressure resistance and corrosion resistance.
- Ball Core: Typically made of stainless steel (SS304/SS316), designed in a spherical shape to enable 90° rapid opening and closing.
- Seat: Sealing materials include PTFE, RPTFE, or metal seals, suitable for different media.
- Stem: Stainless steel material (e.g., 2Cr13), connected to the ball core to drive valve operation.
- Actuation: Supports manual, pneumatic, or electric operation, adapting to industrial automation needs.
- Gray Cast Iron: Low cost, excellent castability, suitable for low-pressure and ambient temperature environments (e.g., standard water supply systems).
- Ductile Iron: High strength and toughness, with a pressure rating up to PN16, ideal for municipal water supply and industrial pipelines.
- Soft Seal (PTFE): Corrosion-resistant and highly sealing, suitable for non-corrosive media (water, steam).
- Metal Seal: Withstands high temperature and pressure, applicable in harsh environments such as oil and chemical industries.
- Nominal Pressure: Commonly PN16 (1.6 MPa), with some models reaching PN25.
- Temperature Range: -20°C to 150°C (soft seal); special designs can withstand higher temperatures.
- Applicable Media: Water, steam, oil, gas, and non-corrosive industrial fluids.
- Size Specifications: DN15 to DN300, with flange connections compliant with GB and DIN standards.
- Municipal Engineering: Water supply systems, wastewater treatment, due to cost-effectiveness and corrosion resistance.
- Industrial Fields: Oil, chemical, and power industries, requiring high-pressure or high-temperature resistance (select ductile iron + metal seals for such cases).
- Building Equipment: HVAC systems, fire protection, relying on rapid shut-off capabilities.
Hebei Mingda International Trading Company is a trading company which is specialized in castings, ODM Ductile Iron Manhole Cover forgings and machinery parts.Our products include all kinds of raw castings to be made of ductile iron , grey iron , brass , stainless steel and aluminums, machined castings and forged parts .ODM Ductile Iron Covers To make these parts according to the customers’Custom Iron Casting drawings , we have relative suitable production craft and equipments, such as resin sand , sand mould , hot core boxes , lost-wax , lost –foam and so on Iron Casting Manufacturer Custom.Specially for hydrant bodies and valves’Ductile Iron Manhole Cover Manufacturer bodies, we have collected rich experience for these products in the past 16 year’s actual production, Now we are proud of our products with good surface and high quality material. Iron Casting ManufacturerWhatever,we have been trying our best to provide our customers with better quality castings by improving production crafts and more careful quality control.Cast Iron Castings Manufacturer