Product details
2028N/4S09 PWM Expansion Valve | 1/2″ x 5/8″ ODS | Without Coil | Castel
The Castel 2028N/4S09 PWM Expansion Valve is a high-performance electronic expansion valve designed for precise refrigerant flow control in HVAC and refrigeration systems. It operates using PWM (Pulse Width Modulation) technology, enabling accurate modulation based on system load and demand.
This model is supplied without coil (S version) and features orifice size 09, making it suitable for controlled capacity applications. It is designed for medium to high-pressure systems and supports a wide range of modern refrigerants.
As shown in the datasheet, the valve provides stable flow characteristics, reliable performance, and compatibility with A1, A2L, and A3 refrigerants .
Key Benefits
PWM-controlled operation for precise refrigerant flow
Supplied without coil for flexible configuration
Orifice size 09 for defined capacity range
Suitable for medium-pressure applications
Wide refrigerant compatibility (A1, A2L, A3)
Reliable and efficient system performance
Compact and robust design
Specifications
Brand: Castel
Model: 2028N/4S09
Product Type: PWM Expansion Valve
Connections
Inlet Connection: 1/2″ ODS
Outlet Connection: 5/8″ ODS
Performance
Orifice Type: 09
Flow Coefficient (Kv): 0.25 m³/h
Electrical
Coil: Not included (S version)
Pressure & Temperature
Maximum Working Pressure (PS): 50 bar
Minimum Temperature: -40°C
Maximum Temperature: +100°C
Compatibility
Refrigerants:
HFC (R134a, R32, R404A, R407C, R410A, R507)
HFO (R1234yf, R1234ze)
HFO + HFC Blends (R448A, R449A, R450A, R452A, R452B, R454A, R454B, R454C, R455A, R513A, R515A, R515B)
HC (R290, R600, R600a, R1270)
Applications
Commercial refrigeration systems
HVAC systems
Chiller systems
VRF and inverter systems
Precision cooling applications
FAQs
What type of control does this valve use?
It uses PWM (Pulse Width Modulation) for precise refrigerant control.
Does this valve include a coil?
No, this is the S version supplied without a coil.
What are the connection sizes?
It has a 1/2″ ODS inlet and 5/8″ ODS outlet.
What is the pressure rating?
It supports up to 50 bar.
What is the orifice size?
It comes with orifice size 09.
