Products--Shanghai Dartham Electric Co.,ltd ::

ELECTRONIC EXPANSION VALVE

Usage:

Air-conditioning electric expansion valve is a Kind of throttling device which controlled by the electric pulse. It main applied in frequence conversion Air-conditioning system. It can give a fast response and a wide modulating range, it also can work under the all kinds of preset modulating method to realize the automatic control of refrigerant flow rate. All of this make Air-conditioning system to work in the best situation, electric energy saving and precision control temperature.

Specifications

Item / Spec. / Pulse	Air flow rate N / L min		Recommend suitable machine(capacity KW)
Item / Spec. / Pulse	325P	500P	Recommend suitable machine(capacity KW)
DPFl .6 - 口	>23	>30	2.0-3.6
DPFl. 8 - 口	>29	>35	2.5-5.0
DPF2.2 - 口	>43	>52	5.0-7.1
DPF2.4 - 口	>51	>71	7.1-10.0
DPF2.6 - 口	>60	>85	10.0-14.0
DPF2.8 - 口	>70	>92	13.5-16.0
DPF3.0 - 口	>80	>105	15.0-17.5
DPF3.2 - 口	>95	>135	17.0-21.0

Working Condition
Suitable environmental temperature	-30 。 C 一 +60 。 C
Suitable flow temperature	-30 。 C 一 +70 。 C
Suitable environmental humidity	95 ％ RH 以下
Suitable refrigerant	R22	R407C	R410A
Pressure applied	2.95 MPa	3.3 MPa	4.15 MPa
Power supply	DCl2V*15 ％
Action mode	4-phase permanent magnetic stepping motor , straight moving mode
Medium flow direction	Both positive and negative direction will be OK
Suggested installation	Valve body vertical , coil up-ward

Technique parameter/ Refrigerant	R22	R407C	R410A
The biggest action pressure difference	2.26 MPa	2.48 MPa	3.5MPa
Reversing valve pressure difference	1.47 MPa	1.47 MPa	2.2MPa
Open impulse	30 ± 20
Total impulse	500
Valve ends leakage	Less than 400mL ／ min
Insulating resistance	More than lOOMQ
Coil temperature rise	Less than 60K
Noise	Less than 60dB(A)
Life span	10 millions

Explanation:

Please carry out experiment and confirm about the matching characteristic of the system .

Please install strainer(more than 100-mesh screen) in front of valve in the air-condition used electronic expansion valve.

Please keep the temperature of valve body below 120 。 C when manufacturer assembles and brazes the tube.


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