Can brass die castings be used in high-pressure HVAC or circulation pumps?
Can Brass Die Castings Be Used in High-Pressure HVAC or Circulation Pumps?
Applicability of Brass Die Castings in High-Pressure Systems
Yes, brass die castings are widely used in high-pressure HVAC and circulation pump systems—particularly in applications requiring dimensional stability, corrosion resistance, and long-term mechanical integrity. Alloys such as C87850 silicon brass, Brass 464, and C84400 semi-red brass offer the mechanical strength and chemical resistance needed for continuous operation under high pressure and temperature.
Pressure Capabilities of Brass Die Cast Components
Operating pressure range: 1.6 to 2.5 MPa (up to 25 bar)
Burst pressure capacity (post-machined parts): Over 4.5 MPa depending on wall thickness and geometry
Temperature tolerance: Up to 200°C for lead-free and low-zinc brass alloys
Wall thickness precision: 2–5 mm, controlled during die casting and optimized via CNC post-machining
These values meet or exceed the typical requirements for hydronic systems, pressure booster assemblies, and industrial fluid control loops.
Alloy Recommendations for High-Pressure Pump Bodies
Alloy | Pressure Capability | Key Properties | Application Areas |
|---|---|---|---|
C87850 Silicon Brass | Excellent | Lead-free, dezincification-resistant | HVAC circulation pumps, potable systems |
Brass 464 | Excellent | High strength, corrosion resistance | Marine-grade booster pumps |
C84400 Semi-Red Brass | Moderate-High | Good machinability, pressure tolerance | General-purpose heating systems |
Design and Validation Standards
Neway produces and validates brass pump housings to meet:
ASTM B584 – Cast brass for valves, fittings, and mechanical applications
ASME B16.15 – Pressure-rated brass and bronze threaded fittings
ISO 19879 – Pressure and leak testing for metal fittings in hydraulic systems
All castings undergo dimensional inspection, hydrostatic or pneumatic leak testing, and metallographic evaluation to ensure structural integrity.
Common Applications in HVAC Systems
Circulation pump housings for hydronic heating
Booster pump bodies in potable and greywater systems
Shells and caps in closed-loop chillers and geothermal loops
Sealed units for glycol or treated water circulation
Customer-Oriented High-Pressure Brass Casting Services
Neway Die Casting delivers performance-focused brass solutions for pressure-intensive environments:
Brass Die Casting Services: Durable alloys and dense castings for fluid movement systems
Post-Machining Services: Precision-sealed threads and mounting interfaces
Tool and Die Making: Mold design optimized for consistent pressure wall profiles
