HONGFA Relay HFD3-VI-12-2Z-L1-3SR
Type: Relay
Brand: HONGFA
Third generation Signal relay
SMT and DIP types available
Single side stable and latching type available
Type: Relay
Brand: HONGFA
Type: Relay
Brand: HONGFA
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08/24/2020
In January 2020, the Shanghai No. 1 Intermediate People's Court rejected the appeals of Shen and Sheng: The quality of the air conditioner caused the fire and the loss, and Sharp should bear the corresponding compensation responsibility.
10/31/2021
When the main circuit of the VFD is connected with the power line, in order to control the motor, it is necessary to connect the surrounding control circuit to the relevant terminals
12/29/2022
The programmable logic controller (PLC) is a digital operating electronic system specially designed for application in industrial environment.
07/14/2020
Expansion valve working principle and correct maintenance Let me talk about commonly used ones, such as Danfoss danfoss expansion valve, Emerson EMERSON expansion valve (Aike ALCO expansion valve), Spoland SPOLAN expansion valve, etc.
06/21/2020
Common failure and analysis of centrifugal air compressor 1. Abnormal vibration and noise: ① Misalignment ② The compressor rotor is unbalanced ③ The impeller is damaged ④ The bearing is abnormal ⑤ The coupling is faulty or unbalanced ⑥ The sealing ring is bad ⑦ The oil pressure and oil temperature are abnormal ⑧ There is dirt in the oil Clean, wear out the bearing ⑨ Surge ⑩ The stress of the gas pipeline is transmitted to the casing, which causes misalignment ⑪ There is a machine working near the compressor<img src="{{media url="Common_failure_and_analysis_of_centrifugal_air_compressor.jpg"}}" alt="" />
02/08/2023
The actuator used in the control valve are nothing more than pneumatic, electric, and hydraulic (electro-hydraulic) type.
07/31/2020
There are generally two types of refrigerant charging methods: low-pressure charging and high-pressure charging. The advantage of the low pressure charging method is that it is easier to control the amount of refrigerant charged,
11/10/2021
Programmable logic controller (PLC) plays an important role in factory automation (FA). The continuous development of technology has greatly promoted the improvement of control function and control level of the control system based on PLC
07/13/2020
Danfoss training-common faults and analysis of compressors In this issue, we will talk about the common faults and analysis of compressors.
06/29/2020
How to deal with compressor stuck cylinder The compressor jamming cylinder means that the shaft of the compressor is stuck, and the compressor cannot rotate at this time. The cause of the compressor jamming cylinder is either the lack of refrigeration oil, insufficient lubrication and increased friction, or the presence of dust or impurities in the pipeline, which causes the moving surface to be stuck, or the pure mechanical failure causes the compressor to be stuck.