Description

Ductile Iron Meter & Valve Body Castings – QT450-10 High-Pressure Components

Guokun Casting, of Baoding Hebei is an ISO 9001-2008 registered iron and steel foundry & supplier of high quality carbon steel, cast iron and machined castings used in power, mining, railway, agricultural, tillage, truck, automobile, pump, valve, motor, pipe fittings and gear industry. Baoding Guokun has been specialized in the designing and manufacturing of various valve components for ball valve, gate valve, globe valve, butterfly valve, through conduit gate valve, knife gate valve, bellow valve, strainers and flow control components.

These precision ductile iron castings are engineered for fluid metering and control applications, built to deliver reliable performance in municipal, commercial, and industrial fluid handling systems. Manufactured from QT450-10 (ductile iron), they offer exceptional strength, impact resistance, and pressure containment, making them ideal for environments demanding durability and leak-tight operation.

Key Features & Specifications

• Material: QT450-10 (Spheroidal Graphite Iron / Ductile Iron)
  • Tensile Strength ≥ 450 MPa, Elongation ≥ 10%
  • Superior toughness and fatigue resistance vs. conventional gray iron
  • Excellent machinability and castability for complex geometries

Ductile cast iron grades

Ductile cast iron: ASTM A536 refer to the standard specification for ductile iron castings. Baoding Guokun, a China sand casting factory, can manufacture various pumps, valves, agriculture parts, motor castings, railway castings, marine castings and other engineering casting components in several grades of ductile iron, including:

ASTM A536 Grade 60-40-18 is a nodular iron with a mostly ferritic microstructure and mechanical properties comparable to low alloy steels.

ASTM A536 Grade 65-45-12 is a nodular iron with a ferritic and pearlitic microstructure and mechanical properties comparable to low alloy steels.

ASTM A536 Grade 80-55-06, relating standards SAE J434C D5506 or ISO 1083 500-7, is a nodular iron with mostly pearlitic and smaller amount of ferrite microstructure.

ASTM A536 Grade 100-70-03, named pearlitic ductile iron, includes graphite spheroids in a matrix of pearlite. The pearlite matrix is comparatively hard and has high strength, combined with good wear resistance. This is combined with average ductility and impact resistance.

ASTM A536 Grade 120-90-02, named Martensitic ductile iron, has low to zero pearlite formation due to specific alloy additions, and can be quite hard and brittle in its untampered form.

If you need more information, please visit the ASTM A536 standard on our website https://www.metalcastingfactory.com/wp-content/uploads/ASTM-A536.pdf.

• Casting Process: Precision shell molding / green sand casting
  • Dense, defect-free internal structure with minimal porosity
  • Customizable to OEM drawings and dimensional requirements
• Machining & surface treatment process:
  • Turning, boring, and thread tapping to produce connecting threads and mating surfaces.
  • Pressure Testing: Hydrostatic / pneumatic testing to verify sealing performance.
  • Surface Treatment: Anti-corrosion treatments such as plastic spraying, electrophoretic coating, or dip painting.

• Design & Function:
  • Multi-port housings with threaded connections (G, NPT, BSP, custom sizes available)
  • Reinforced bosses and bolted flanges for secure assembly and pressure sealing
  • Internal cavities optimized for meter cartridges, valve cores, and flow control components
• Quality Assurance:
  • ISO 9001-compliant production and inspection
  • Full dimensional checks, visual inspection, and optional NDT (MT/UT)
  • Hydrostatic/pneumatic pressure testing to validate hermetic sealing
  • Traceable material certification and batch documentation

Primary Applications & Scenarios

1. Municipal & Residential Utilities
   • Water meter bodies for domestic cold/hot water distribution networks
   • Gas meter housings for natural gas/LPG supply systems
   • Metering stations requiring long-term corrosion resistance and low maintenance
2. Commercial & Industrial Fluid Systems
   • Flow meter casings for HVAC, process water, and chemical distribution
   • Pressure regulating valve bodies for compressed air, water, and gas lines
   • Pump control and manifold housings for industrial process plants
3. Oil & Gas Distribution
   • Compact valve bodies for low-pressure pipeline applications
   • Metering components for fuel and natural gas custody transfer
   • Equipment exposed to vibration, temperature fluctuations, and cyclic loading
4. Custom OEM Equipment
   • Specialized fluid control housings for agricultural irrigation systems
   • Industrial filter and strainer bodies for water treatment plants
   • Custom cast components for process automation and fluid handling machinery

Our Value-Added Services

• Complete one-stop solution: pattern design, casting, CNC machining, thread tapping, deburring, and surface treatment (painting, powder coating, zinc plating)
• Flexible production: small prototype runs to high-volume serial production
• Engineering support for design optimization, cost reduction, and material selection
• Strict quality control ensures compliance with industry standards for pressure containment and long-term reliability

Contact gina@guokuncasting.com today to discuss your project requirements, share your drawings, or request a quote for custom ductile iron meter and valve body castings.