| Model: | FSP900 |
|---|---|
| Brand: | FGT |
| Origin: | Made In Taiwan, China |
| Category: | Electronics & Electricity / Electronic Instrument / Air & Gas Flowmeter |
| Label: | flow meter , water flow meter , insertion flow meter |
| Price: |
US $300
/ pc
|
| Min. Order: | 10 pc |
| Live Chat: |  | Last Online:26 May, 2022 |
Description
Product Features
FSP900 Water Flow Meter/Switch
It is a device for automatic control and protection of water flow. When the water flow is changed, the control circuit absorbs or disconnects the dynamic force generated by the water flow on the target, so as to achieve the purpose of automatic control. Water flow switch is widely used in HVAC air conditioning system
FSP900 Water Flow Meter/Switch
Remote monitoring design
IOT module
FSP900 Water Flow SwitchHow it works:
The FSP900 water flow switch will be installed at the outlet end of the chilled water used in the cooling water unit and the outlet end of the cooling water/chilled water of the water-cooled chiller. The normally closed water flow switch (when the air conditioning system is in normal operation, the water flow switch control circuit is closed, here refers to the state of the water flow switch is normally closed) The working process is: when the water flow reaches a certain value,FSP900 Water Flow Switchclosed, after which the compressor starts and the air conditioning system starts to operate. If there is water leakage in the air conditioning system or other reasons cause the water flow of the system to decrease, when the water flow decreases to a certain value, the water flow switch will be disconnected, the compressor will be shut down, and the HVAC air conditioning system will stop running.
1. Cooling water outlet pipe; 2. Water-cooled chiller condenser; 3. Water-cooled chiller evaporator; 4. Chilled water outlet pipe; 5.FSP900 Water Flow Switch.
FSP900 Water Flow SwitchInstallation position in air conditioning system
FSP900 Water Flow SwitchThe role of:
When the air conditioning system has sufficient water flowFSP900 Water Flow Switchclosed, after which the compressor starts, thus ensuring the safe and efficient operation of the air conditioning system.
1) When the flow rate of chilled water is too small, the load of the evaporator is insufficient, the evaporating temperature is too low, the cooling capacity decreases, and the operation efficiency decreases.
2) When the flow rate of chilled water is extremely small, the load of the evaporator is seriously insufficient, the evaporation temperature is very low, the evaporator freezes (or even freezes), and the suction pressure of the compressor is very low. If the system runs under this condition for a long time, it will cause the compressor to be damaged due to difficulty in oil return.
3) When the cooling water flow of the water-cooled chiller is too small, the heat dissipation efficiency of the condenser is low, and the heat of the fluorine system cannot be dissipated in time, resulting in an increase in the condensing temperature of the system, a decrease in the cooling capacity, and a decrease in the operating efficiency.
4) When the cooling water flow of the water-cooled chiller is extremely small, the heat dissipation of the condenser is seriously insufficient, the condensing temperature rises to a high level, and the exhaust temperature of the compressor is extremely high. If the system runs under this condition for a long time, it will cause the compressor to be damaged due to the carbonization of the lubricating oil.
Design flow value:
Give an example to illustrate the method of calculating the closed and open flow values of the chilled water flow switch of a chiller of a certain cooling capacity.
Given that the cooling capacity of the chiller is 32kW, try to calculate the closed and open flow values of the matching water flow switch.
1) Calculate the closed flow value of the water flow switch. The designed water flow (m3/h) of the evaporator of the unit can be calculated according to formula (1):
Considering the induction error of the water flow switch, the disconnected flow value of the water flow switch is (3.1±0.2)m3/h.
FSP900 Water Flow SwitchApplications:
FSP900 Water Flow SwitchThe stainless steel corrosion-resistant insert is used to detect the water flow condition. When there is water flow, the flow rate and temperature of the flowing water are quickly grasped, and the action output is driven to provide the water flow status signal.
The installation requirements are high, and the resistance is large when the small pipe diameter is installed, so it cannot be installed on the curved pipeline. When installed in a small pipe diameter or with a small water flow, it is prone to frequent movements due to the jitter of the water flow. The FPS900 water flow switch also solves the problem of the traditional design flow switch, and it is easy to cause the target to break when it is installed at the elbow of the large pipe diameter, which is an effective solution.
The static pressure of the pipeline impacts the bellows, and the bellows is prone to fatigue due to frequent movements.
FSP900 Water Flow Switch
Solve the reasons for the target breakage of the target flow switch:
The force on the target piece of the target flow switch is related to the water flow speed and the area of the target piece. The larger the flow rate and the target piece area, the greater the force acting on the target piece. For sensing water flow, the longest target is often installed on site. Due to the large force acting on the target, the target is excessively bent and loses its elasticity, and in severe cases, the target is broken.
The target flow switch usually needs to be more than 5 times the pipe diameter from the elbow and the valve. Due to the small area of the current building's computer room, it is impossible to ensure enough straight pipe sections to install the water flow switch. For example: DN300 pipe diameter, before and after the water flow switch It is almost impossible to guarantee a straight pipe section of 1500m, which is a very important reason for the failure of many field water flow switches.
In a curved pipe, due to the diversion effect of the curved pipe wall, the inner flow velocity increases and the outer velocity decreases gradually, forming a trapezoidal velocity distribution law of each flow section, causing the entire target to break due to uneven force. .
The impact of the water hammer generated by each start and stop of the pump will cause the target to be excessively bent or broken. The larger the pipe diameter, the greater the risk.
FSP900 Water Flow Switch
It can be installed closer to the elbow or valve, which can greatly reduce the straight pipe section required to install the target flow switch, save the engineering cost, and also greatly improve the stability of the water flow protection. Applications.
