Product Code
2028EX/3A603
PWM Expansion Valve - ATEX
3/8"x1/2"ODS Seat 02 - 220/230V
Product use
Solenoid expansion valves with the 'EX' suffix are compliant with the ESR of Directive 2014/34/EU ' ATEX. This equipment is suitable for use on refrigeration systems located in areas classified as 'Zone 2' risk of explosion, according to the definition in Annex I of Directive 1999/92/EC.
Accessories for use with the following ASHRAE 34:2019 refrigerants, Class A1, A2L, or A3:
- HFC (R134a, R32, R404A, R407C, R410A, R507)
- HFO and HFO/HFC blends (R1234ze, R1234yf, R448A, R449A, R450A, R452A, R452B, R454B, R513A)
- HC (R290, R600, R600a, R1270)

Maximum allowable pressure PS = 50 bar.
Allowable temperatures TS = -40 / +100 °C

These valves are only sold in the model with the ATEX certified coil (A6 suffix), with 9 nozzles assembled for an increasing output from 2 to 36 kW with R290.
Product Details
Orifice type
03
Connections In Ø [in.]
3/8"
Connections In Ø [mm]
-
Out Ø [in.]
1/2"
Out Ø [mm]
-
Kv [m³/h]
0,023
PS [bar]
50
TS [°C] Min
-40
TS [°C] Max
+100
Package pcs.
21
Notes
for rated capacities see table of the orifice assemblies