Product details
2028C/4S09 PWM Expansion Valve | 1/2″ x 5/8″ ODS | Without Coil | Castel
The Castel 2028C/4S09 PWM Expansion Valve is a high-performance electronic expansion valve designed for precise refrigerant flow control in advanced HVAC and refrigeration systems. It operates using PWM (Pulse Width Modulation) technology, enabling accurate modulation of refrigerant flow based on system demand.
This model is supplied without coil (S version) and comes with an orifice size 09, making it suitable for specific capacity ranges. It is designed for high-pressure applications and modern refrigerants, ensuring efficient and reliable system performance.
As shown in the datasheet, the valve supports a wide range of refrigerants and offers high pressure resistance with precise flow characteristics .
Key Benefits
PWM-controlled operation for precise refrigerant flow
Supplied without coil for flexible configuration
Orifice size 09 for defined capacity range
High pressure rating up to 90 bar
Wide refrigerant compatibility (A1, A2L, A3)
Suitable for modern HVAC and inverter systems
Compact and efficient design
Specifications
Brand: Castel
Model: 2028C/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): 90 bar
Maximum Working Pressure (MWP): 1305 psi
Minimum Temperature: -80°C
Maximum Temperature: +60°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
VRF and inverter HVAC systems
Commercial refrigeration systems
Chiller systems
Precision cooling systems
Electronic expansion control applications
FAQs
What type of control does this valve use?
It uses PWM (Pulse Width Modulation) for precise flow 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 90 bar (1305 psi).
What is the orifice size?
It comes with orifice size 09.
