Thermostatic Expansion Valve (with Orifice)
Description
Thermostatic expansion valves regulate the injection of refrigerant liquid into evaporators, in which the injection is controlled by the evaporator’s superheat. The CTV and DTV thermostatic expansion valves are widely used in refrigeration cabinets, ice machines, dehumidifiers, and refrigeration/air conditioning requirements in a wide range of temperatures.
Characteristics
1. Constant superheat adjustment performance
2. Interchangeable orifice assembly
3. Wide range of evaporating temperature (-40 to 10°C)
4. The valve can be supplied with an MOP (maximum operating pressure)
5. Adjust to refrigerant R410A
| Model | Equalization | Equalization connection | Connection form | Connection | Capillary tube | |
| Inlet×Outlet | (m) | |||||
| in. | mm | |||||
| CTV | Internal | Flare SAE | 3/8×1/2 | 10×12 | 1 | |
| CTVE | External | Inch Connection： 1/4"Flare Nut 7/16"- 20UNF Thread | ||||
| DTV | Internal | Solder ODF | ||||
| DTVE | External | Metric connection Φ6 Flare Nut M12X1.25 Thread | ||||
| Model | Orifice number | Nominal capacity | ||||
| (KW) | ||||||
| R134a | R22 | R407C | R404A/R507 | R410A | ||
| CTV(E) DTV(E) | 0 | 0.65 | 1.14 | 1.13 | 0.8 | 1.32 |
| 1 | 1.5 | 2.8 | 2.8 | 1.85 | 3.25 | |
| 2 | 2.5 | 4.7 | 4.57 | 3.1 | 5.45 | |
| 3 | 4 | 7.5 | 7.03 | 5 | 8.7 | |
| 4 | 6.7 | 12.2 | 11.96 | 8.1 | 14.15 | |
| 5 | 8.2 | 14.9 | 14.4 | 9.9 | 17.28 | |
| 6 | 9.5 | 17.2 | 16.9 | 11.4 | 19.95 | |
Nominal capacities are based on 38°C, a condensing temperature of 4°C, evaporating temperature and 1K liquid sub cooling at the inlet of the expansion valve.
Valve Pressure drop Ratings
R134A: 0.41MPa
R22, R407C, and R404A/507: 0.69Mpa
R410A: 1.35Mpa
| Connection | Valve code | Equalization | Refrigerant code | Orifice number |
| C | TV | E | X | 6 |
| C-Flare SAE D-Solder ODF | Valve code | "E" indicates external equalizer (Omit for internal equalizer) | N-R134a X-R22 Z-R407C S-R404A/R507 L-R410A | Orifice number（0 ~ 6) |
Model CTVEX6 is an example only.
