Product Features

• Flow range: Water: 0.03~3 m/S Oil: 0.03~3 m/S
• Applicable pipe diameter: DN8~DN350
• Detection fluid: water, oil
• Protection class: IP67

FSP900 Water Flow Meter/Switch|calorimetric flow meter

Is a powerful, high-performance flow meter, especially suitable for air conditioning systems. This product adopts a high-precision sensor, which can detect the flow of water and oil, and the flow range is 0.033 m/s. It is suitable for pipe diameters from DN8 to DN350, and is widely used in air conditioning systems and other fields. The product is made of stainless steel, which is corrosion-resistant and has a long service life. Different from the target flow switch, the FSP900 flow meter adopts advanced technology, which can accurately detect the flow of fluid in real time, and improves the efficiency of the air conditioning system. In addition, FSP900 flowmeter also has IP67 level of protection, with high durability and stability. If you are looking for a high-performance, high-efficiency flow meter to improve the operating efficiency of the air conditioning system, the FSP900 flow meter will be your ideal choice.

FSP900 Water Flow Meter/Switch|calorimetric flow meter

Remote monitoring design

 

 

FSP900 Water Flow Switch|calorimetric flow meterHow 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 Switch|calorimetric flow meterclosed, 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|calorimetric flow meter.

FSP900 Water Flow Switch|calorimetric flow meterInstallation position in air conditioning system

FSP900 Water Flow Switch|calorimetric flow meterThe role of:

When the air conditioning system has sufficient water flowFSP900 Water Flow Switch|calorimetric flow meterclosed, 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 Switch|calorimetric flow meterApplications:

FSP900 Water Flow Switch|calorimetric flow meterThe 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|calorimetric flow meter

 

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|calorimetric flow meter

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.

 

Flowmeter Type Flowmeter Price Gas Flowmeter Flowmeter Principle

 

 

 

• water flow switch
  

  

  The principle of the water flow switch is to measure the water flow, by measuring the pressure drop at both ends of the valve, orifice plate, etc., and then by checking the pressure drop and flow curve of the valve or orifice plate, the accurate flow can be obtained. Flow rate has been widely used in HVAC water side systems and flow measurement instruments. The application of the differential pressure switch in the HVAC system is mainly controlled according to the resistance and flow curve of the HVAC equipment. , water filter, valve and water pump all have their performance curves of pressure drop and flow, as long as the measured pressure difference on both sides of the differential pressure switch is compared with the preset value, the flow can be accurately controlled. The differential pressure switch used as flow control in HVAC has the characteristics of accurate flow control, no additional resistance to the water system, no requirements for the diameter of the water pipe, and no water flow disturbance interference. It can replace any form of target flow switch. Relatively For the target flow switch, it can avoid false flow caused by pump cavitation, and has very accurate reset flow and disconnection flow. Overview

  water flow switch

  In some large equipment and machines, circulating water is usually used to cool the unit, so as to keep the working temperature of the unit within a reasonable range. When the cooling water system fails, if the water flow stops, it will cause the temperature of the unit to rise, affecting the normal operation of the unit, and may cause the unit to burn out in serious cases. Usually, a water flow switch is installed in the pipeline of the cooling water system to monitor the flow state of the cooling water in real time. Once the cooling water stops flowing, the water Flow SwitchIt will send an alarm signal to the central control room, so that the central control room can deal with it in time to avoid accidents.

  principle

  There are many ways to detect the fluid flow state. Generally, the water flow switch is roughly divided into three types. One is the early mechanical flow switch, also known as the baffle flow switch. Its principle is to push the baffle to deflect through the flow of water. Then touch the micro switch action. The advantages of this mechanical flow switch are that it is easy to use and cheap. The disadvantage is that the mechanical structure will cause wear and tear. In the case of poor water quality, the action is not very stable; one is a thermal flow switch, its principle Yes, the size of the liquid flow is different, and the heat taken away is different. By detecting the size of the heat loss, the flow of the water can be detected. The advantage of this water flow switch is that there are no moving parts, there is no wear and tear, and its life and stability are greatly enhanced. The disadvantage is that the price is slightly more expensive than the mechanical type; the last one is a differential pressure flow switch. The switch is pioneering to precisely control the flow according to the heat exchanger pressure drop and flow curve without any pressure drop on the air conditioning system.

  Baffle Flow Switch

  Principle and Features

  baffle Flow SwitchThe mechanical part is safely separated from the electronic part. The product does not contain bellows that can easily lead to failures, and electrical components do not directly contact metal components with large temperature differences. Using imported magnetic switch as the electrical action part, it has smaller disconnection and reset flow, and is the preferred flow protection product for central air conditioning and industrial fluid control.

  Apply

  baffle Flow SwitchGas-liquid dual-purpose type, which can be widely used in industrial automation/mechanical equipment/air compression industry/refrigeration and air-conditioning fields. In industrial occasions, it can be used in water-cooled welding machines, laser equipment cooling systems, vacuum coating machines, electric furnaces, and polysilicon ingot furnaces. Wait. The water flow switch magnet is not in a flowing waterway and can be used in sewage systems and works properly.

  technical parameter

  △Voltage: 250V (max.)

  △Maximum current and capacity: 1A, 50VA

  △ Wiring method: direct wiring

  △ Output: SPST magnetic switch (factory setting is normally open)

  △Pressure resistance: 25bar, 50bar can be customized

  △Average pressure loss: 0.01bar (maximum flow rate)

  △Working temperature: -20…90℃

  

  Installation location

  △Enclosure protection grade: IP65

  △Material: Wetted Housing: Nickel-plated brass

  Bezel: Stainless Steel

  Seal: PTFE

  Applicable media

  water, steam, oil

  Thermal flow switch

  Features

  1. The probe has been specially treated, and the outer surface has a protective film, which is completely anti-corrosion and anti-scaling;

  2. The potentiometer is directly driven by the drive screw for setting without disassembly, so it is completely waterproof

  3. The original double adjustment technology makes the adjustment more convenient and the display more accurate

  4. The original can be used as double relay output to make control easier

  4. LED lights can reflect the size of the current flow

  5. Ultra-small shell, integrated design, all made of stainless steel, practical and beautiful

  technical parameter

  1. Setting method: two potentiometer settings (no disassembly, directly driven by the drive screw to drive the potentiometer to set), one to set the action point, one to set the range

  2. Measuring range: water 0-10m/s, oil 0-15m/s, gas: 0～30m/s

  3. Working voltage: DC24V, AC/DC110V, AC/DC220V

  4. Working current: <60mA

  5. Output mode: relay output, PNP output, NPN output, can be used as double alarm output

  6. Operating temperature: normal temperature type -20-80℃, high temperature type 0-150℃

  7. Reverberation time: 1～10S, typical value is 2S

  8. Initialization time: about 8S

  9. Electrical protection: reverse phase, short circuit, overload protection

  

  water flow switch

  For more detailed parameters, please consult the manufacturer Kiel China

  Differential pressure flow switch

  Feature description

  

  Fixed differential pressure flow switch

  The fixed single set point differential pressure switch is specially developed for high-volume OEM customers. ACOL's professionals first communicate well with customers to understand the characteristics of customers' products and professionally customize suitable differential pressure switches for this product, so that the water The flow control is reasonable and accurate, and the user cannot change the set value of the differential pressure switch on site, thus ensuring that the set value of the differential pressure switch cannot be changed, and reducing the failure and hidden dangers of the unit due to improper installation and design of the on-site water system. ACOL company fully considers the actual situation of the user's application, knowing that the user is concerned about flow control, and the fixed-point differential pressure switch can convert the differential pressure setting value of the differential pressure switch into a specific heat exchanger according to the customer's requirements. The flow protection value, we can customize the differential pressure switch that meets the customer's flow index according to this requirement, and the customer only needs to test according to the flow during inspection.

  technical parameter

  △Storage temperature: -29～82℃

  △Ambient temperature: -20～71℃

  △Using medium temperature range: -20～93℃

  △ High and low voltage side connection port: 1/4 SAE (7/16″-20UNF), G1/4 (1/4″NPT), etc. optional

  △Maximum allowable static pressure: 10bar

  △Maximum allowable differential pressure: 5bar

  △Setpoint repeatability deviation: ±1%

  △Output form: One set of SPDT dry contact output, one or two outputs are optional, the factory setting is normally open when one output is

  △Switch parameters: 10A (max.) 250V (max.)

  △ Wiring method: DIN 43650C connector/direct wire (105℃ flame retardant sheathed wire 2X0.75mm2 or 3X0.75mm2) optional

  Applicable media

  water, air

  Infrared water flow switch

  function

  Also called infrared water flow sensor, it is applied to the water inlet of the hot water heater, a new high-tech industry in the water heater industry, to detect the flow of water entering the instantaneous electric water heater, and to control the startup and shutdown functions. It is especially suitable as a supporting device for constant temperature instant electric water heater, and transmits the detected water flow and temperature to the control system in time to achieve the purpose of fast constant temperature. It is also suitable for the flow detection needs of similar products.

  product manual

  The infrared flow sensor is installed at the inlet of the water heater and other products to detect the water flow. When the water flows through the product, the impeller rotates, and its rotational speed changes with the flow, and the infrared flow sensor outputs the corresponding pulse signal. Feedback to the controller, the controller will issue corresponding commands according to the size and on-off of the water flow. The internal design of this product adopts the physical principle structure and has the function of anti-reverse flow signal, which prevents the dry burning phenomenon of the product when the water flow is reversed. To prevent the magnetic impurities in the water from being adsorbed on the impeller, the long-term use signal will not change with the prolonged use of the product. In addition, there is no magnetic field as a signal source, and the shaking of the impeller does not affect the strength of the signal, so the gap between the impeller and the casing can be increased to ensure that the impeller will not stick or jam due to poor water quality in long-term use.

  Within a unit flow, the more pulse parameters sent out, the more accurate and consistent the product will be. When the infrared flow sensor has a flow rate of 1 liter/min, it can send about 20 pulse signals per second, and can send about 1200 pulse signals per minute.

  water flow meter

  common problem

  1. What is a thermal mass flow meter?
  Answer: Thermal mass flowmeter is an instrument used to measure the flow of liquid or gas. It uses elements such as thermistors to detect the temperature change of the fluid, and determines its flow rate by calculating the flow rate of the fluid.
  2. What is the working principle of thermal mass flowmeter?
  Answer: Thermal mass flowmeters use heating elements to generate heat in the fluid, and use elements such as thermistors to detect changes in the temperature of the fluid. The faster a fluid flows, the more heat it removes, so a thermal mass flow meter can measure a fluid's temperature change to determine its velocity and flow.
  3. What are the advantages of thermal mass flow meters?
  A: The thermal mass flowmeter has the advantages of high sensitivity, fast response, high measurement accuracy, and can measure high-viscosity fluids.
  4. What types of fluids can thermal mass flowmeters measure?
  Answer: Thermal mass flowmeters can measure various liquids and gases, such as water, oil, air, oxygen and so on.
  5. What matters should be paid attention to during the use of thermal mass flowmeter?
  Answer: When using a thermal mass flowmeter, attention should be paid to avoiding interference factors such as particles and air bubbles in the fluid, and corresponding calibration and adjustment should be carried out according to the actual situation.
  6. What is the measuring range of thermal mass flowmeter?
  Answer: The flow rate that thermal mass flowmeters can measure ranges from a few microliters per minute to thousands of liters per minute, depending on different models and specifications.
  7. How to choose a suitable thermal mass flow meter?
  Answer: To choose a thermal mass flowmeter, you need to determine the measurement range, accuracy requirements and other parameters according to actual needs. At the same time, you also need to consider factors such as the use environment and installation method.
  8. What are the installation methods of the thermal mass flowmeter?
  Answer: Thermal mass flowmeters can be installed in different ways such as straight pipe, intubation, and flange. The specific installation method needs to be determined according to the use environment and equipment requirements.
  9. Can the thermal mass flowmeter be automatically controlled?
  Answer: Yes. Thermal mass flowmeters can be used in conjunction with automatic control systems to achieve real-time monitoring and control of flow.
  10. What issues should be paid attention to in the maintenance and maintenance of thermal mass flowmeters?
  Answer: When using a thermal mass flowmeter, it is necessary to regularly check and maintain the equipment, such as cleaning the pipeline and replacing the battery. At the same time, it is necessary to prevent the equipment from being damaged by environmental factors such as mechanical impact, high temperature, and humidity.