Gravity casting—also known as gravity die casting—is a widely used and highly reliable casting process in the brass industry. It is especially popular for manufacturing brass faucets, valves, water meter bodies, and sanitary hardware due to its stability, consistency, and cost-effectiveness.
For beginners who are new to casting equipment or faucet production, this article provides a clear and comprehensive introduction to what gravity casting is, how it works, and why it matters for your factory.
1.What Is Gravity Casting?
Gravity casting is a process where molten metal flows into a metal mold (die) under natural gravity without additional pressure.
Unlike sand casting, which requires disposable sand molds, gravity casting uses reusable steel molds, providing:
·Higher stability
·Better efficiency
·Improved surface quality
·Longer mold lifespan
Basic workflow:
1.Mold preheating
2.Mold coating / spraying
3.Mold clamping
4.Pouring molten brass into the gating system
5.Natural filling under gravity
6.Cooling and solidification
7.Automatic mold opening
8.Removing gates, trimming, grinding, polishing
This makes gravity casting ideal for mass production in the brass industry.
2.What Is a Gravity Casting Machine?
A gravity casting machine is an automated system designed to perform the entire casting cycle.
DingZhu Intelligent Equipment offers advanced gravity casting machines specifically designed for brass materials.
For brass faucet and water meter manufacturers, gravity casting machines significantly improve consistency and reduce labor dependence.
3.Industries and Products Using Gravity Casting
Industries:
·Faucet manufacturing
·Water meter & flow meter manufacturing
·Valve and pump industry
·Sanitary hardware
·Brass HVAC components
Common products:
·Brass faucet body
·Brass valve body
·Brass water meter housing
·Brass pipe fittings, elbows, unions
·Brass sanitary parts
These items require strong mechanical performance and high pressure resistance—making gravity casting the ideal solution.
4.Gravity Casting vs Low Pressure Casting
Both gravity casting and low pressure casting are essential in modern brass foundries.
Below is a practical comparison:
|
Item |
Gravity Casting |
Low Pressure Casting |
|
Filling Method |
Natural gravity |
Pressurized filling from bottom |
|
Surface Quality |
Good |
Excellent |
|
Density |
Moderate |
High density |
|
Product Complexity |
Medium |
High,very uniform walls |
|
Equipment Cost |
Lower |
Higher |
|
Automation Level |
Medium |
High |
|
Best For |
Simple / typical faucet parts |
Complex faucet bodies, high-grade brass parts |
Choosing the right process:
Gravity casting → Ideal for standard faucet bodies, valves, and fittings
Low pressure casting → Ideal for high-end, complex, or deep-cavity components
5.Why the Brass Industry Prefers Gravity Casting
✔ Stable and repeatable production
Ensures consistent quality for mass manufacturing.
✔ Long mold service life
Metal dies can run from 50,000 to 200,000 cycles depending on product size.
✔ Lower equipment cost
More affordable than low pressure casting systems.
✔ Simple and easy-to-control process
Great for factories that are upgrading from manual or sand-casting operations.
✔ Excellent structural strength
Particularly suitable for water and fluid-handling components
6.DingZhu Intelligent Offers Turnkey Brass Faucet & Meter Casting Solutions
As a professional manufacturer of brass casting equipment, Xiamen DingZhu (DZ) Intelligent Equipment Co., Ltd. provides:
➤ Complete Gravity Casting Machine Lines
·Automatic cycle casting
·Multi-cavity mold compatibility
·Automatic pouring / automatic take-out
·Precision temperature management
·Tilting-type casting (optional)
➤ Full Faucet Production Line (One-Stop Solution)
We provide fully customized turnkey solutions, including:
·Gravity casting machines
·Low pressure casting machines
·CNC machining centers
·Robotic grinding & polishing systems
·Sand core shooting machines
·Assembly & testing equipment
➤ OEM/ODM Customization
We design molds, production lines, and complete plant layouts based on customer product drawings.
7.Future Trends of Gravity Casting
·Full automation and robotic operation
·Intelligent production with MES and real-time monitoring
·Quick mold-changing technology
·Environment-friendly casting processes
·Higher precision for faucet and water meter products
Gravity casting is evolving into a highly automated and digital production method.
Gravity casting—also known as gravity die casting—is a widely used and highly reliable casting process in the brass industry. It is especially popular for manufacturing brass faucets, valves, water meter bodies, and sanitary hardware due to its stability, consistency, and cost-effectiveness.
For beginners who are new to casting equipment or faucet production, this article provides a clear and comprehensive introduction to what gravity casting is, how it works, and why it matters for your factory.
1.What Is Gravity Casting?
Gravity casting is a process where molten metal flows into a metal mold (die) under natural gravity without additional pressure.
Unlike sand casting, which requires disposable sand molds, gravity casting uses reusable steel molds, providing:
·Higher stability
·Better efficiency
·Improved surface quality
·Longer mold lifespan
Basic workflow:
1.Mold preheating
2.Mold coating / spraying
3.Mold clamping
4.Pouring molten brass into the gating system
5.Natural filling under gravity
6.Cooling and solidification
7.Automatic mold opening
8.Removing gates, trimming, grinding, polishing
This makes gravity casting ideal for mass production in the brass industry.
2.What Is a Gravity Casting Machine?
A gravity casting machine is an automated system designed to perform the entire casting cycle.
DingZhu Intelligent Equipment offers advanced gravity casting machines specifically designed for brass materials.
For brass faucet and water meter manufacturers, gravity casting machines significantly improve consistency and reduce labor dependence.
3.Industries and Products Using Gravity Casting
Industries:
·Faucet manufacturing
·Water meter & flow meter manufacturing
·Valve and pump industry
·Sanitary hardware
·Brass HVAC components
Common products:
·Brass faucet body
·Brass valve body
·Brass water meter housing
·Brass pipe fittings, elbows, unions
·Brass sanitary parts
These items require strong mechanical performance and high pressure resistance—making gravity casting the ideal solution.
4.Gravity Casting vs Low Pressure Casting
Both gravity casting and low pressure casting are essential in modern brass foundries.
Below is a practical comparison:
|
Item |
Gravity Casting |
Low Pressure Casting |
|
Filling Method |
Natural gravity |
Pressurized filling from bottom |
|
Surface Quality |
Good |
Excellent |
|
Density |
Moderate |
High density |
|
Product Complexity |
Medium |
High,very uniform walls |
|
Equipment Cost |
Lower |
Higher |
|
Automation Level |
Medium |
High |
|
Best For |
Simple / typical faucet parts |
Complex faucet bodies, high-grade brass parts |
Choosing the right process:
Gravity casting → Ideal for standard faucet bodies, valves, and fittings
Low pressure casting → Ideal for high-end, complex, or deep-cavity components
5.Why the Brass Industry Prefers Gravity Casting
✔ Stable and repeatable production
Ensures consistent quality for mass manufacturing.
✔ Long mold service life
Metal dies can run from 50,000 to 200,000 cycles depending on product size.
✔ Lower equipment cost
More affordable than low pressure casting systems.
✔ Simple and easy-to-control process
Great for factories that are upgrading from manual or sand-casting operations.
✔ Excellent structural strength
Particularly suitable for water and fluid-handling components
6.DingZhu Intelligent Offers Turnkey Brass Faucet & Meter Casting Solutions
As a professional manufacturer of brass casting equipment, Xiamen DingZhu (DZ) Intelligent Equipment Co., Ltd. provides:
➤ Complete Gravity Casting Machine Lines
·Automatic cycle casting
·Multi-cavity mold compatibility
·Automatic pouring / automatic take-out
·Precision temperature management
·Tilting-type casting (optional)
➤ Full Faucet Production Line (One-Stop Solution)
We provide fully customized turnkey solutions, including:
·Gravity casting machines
·Low pressure casting machines
·CNC machining centers
·Robotic grinding & polishing systems
·Sand core shooting machines
·Assembly & testing equipment
➤ OEM/ODM Customization
We design molds, production lines, and complete plant layouts based on customer product drawings.
7.Future Trends of Gravity Casting
·Full automation and robotic operation
·Intelligent production with MES and real-time monitoring
·Quick mold-changing technology
·Environment-friendly casting processes
·Higher precision for faucet and water meter products
Gravity casting is evolving into a highly automated and digital production method.
