The H-type thermal expansion valves for auto air-conditioners are such valves which expand on heat by interiorly temperature sensing and exteriorly balancing. They feature a sensitivity and reliability in temperature sensing, firmness against the pressure dropping-down with the evaporator, vibration resistance, easiness of regulating etc.. Apart from reference to American, Japanese and other international auto standards, our QRFWH serial expansion valves also represent advanced technologies and special characteristics.
The h-type thermal expansion valves for auto air-conditioners are such valves which expand on heat by interiorly temperature sensing and exteriorly balancing. The feature a sensitivity and reliability in temperature sensing, firmness against the pressure dropping-down with the evaporator, vibration resistance, easiness of regulating, etc. Apart from reference to American, Japanese and other international auto standards, our qrfwh serial expansion valves also represent advanced technologies and special characteristics.
Key specifications/special features:
* international and domestic advanced sealing structure in the balancing part (patent number: zl96120084.7)
* advanced technology for the steel ball sealing of the bellos (patent number: 02137156.3)
* advanced negative static overheat technology (patent number: zl02257444.1)
* top sensitive of regulating
* steady regulation with small fluctuation
* little leak in the balancing part
* the bellows works reliably with no leak
* no whistle noise
* long service life.
DHF 4-way reversing valve, the key part of the heat pump air conditioner, diverts the direction of the refrigerant flow under the electromagnetism of the pilot valve to supply either heating in winter or cooling in summer to the conditioned place. The character of the design of the DHF series is twice-opening, the diversion is controlled by the pilot valve, ensuring the high reliability of operation.
Key specifications/special features:
It diverts the direction of the refrigerant flow under the electromagnetism of the pilot valve to supply either heating in winter or cooling in summer to the conditioned place
Capacity: 4kw
Power: 3/4 to 1.5hp
Internal leakage: <1, 000ml/min
Maximum operation pressure differential: 2.25mpa
Refrigerants: r22, r407c, r134a, r410a
Pressure range:0.25-3.1mpa(r22, r407c, r134a);
0.30-4.15mpa(r410a).
Connection at high-pressure side: 8.1mm
Connection at low-pressure side: 9.65mm
Minimum operation pressure differential: 0.25mpa.
