R410a Emerson Expansion Valve TRAE 8/10/12/15/18 ZAA 8-18Tons PCN 066797/8/9 066801/02

This is Emerson bi‑flow balanced‑port thermal expansion valve that precisely meters refrigerant flow for reversible heat pump & air‑conditioning systems, solving unstable superheat, capacity mismatch between cooling‑heating cycles and pressure disturbance issues in HVAC‑R equipment。

Product Information

Product Features

• Bi‑directional balanced‑port construction works reliably for both cooling and heat‑pump heating reverse‑cycle operations
• Optimized static superheat setting for normal & reverse flow, matching heat‑pump cooling‑heating capacity requirements
• Compact hermetic integrated‑body design for installation in confined equipment space
• Stainless‑steel power element for enhanced pressure resistance and long service lifespan
• 1.5‑meter capillary tube assembly with thermal sensing bulb
• External equalizer configuration for stable performance under wide evaporator load variations
• Factory‑calibrated base setting; custom superheat setting available upon request
• High working pressure rating compatible with high‑pressure R410A refrigerant systems

Specific Application Scenarios

1. Reversible air‑to‑water heat pump units: For residential & commercial heating‑cooling heat pumps running R410A refrigerant; technicians select these Emerson valves to maintain stable performance switching between heating and cooling modes.
2. Commercial packaged air‑conditioning systems: Applied on medium‑tonnage rooftop AC units requiring accurate refrigerant metering under fluctuating ambient temperature.
3. Close‑control precision air‑conditioning: Server room / laboratory precision HVAC equipment, to keep stable evaporator superheat under variable thermal loads.
4. Transport heat‑capable air‑conditioning systems: Specialized vehicle or mobile climate‑control systems with reversible heat‑pump function.
5. Industrial process cooling reversible chillers: For process chillers with heat‑recovery / reverse‑cycle operation, protecting compressors from flood‑back and improving energy efficiency.