Переключатель дифференциального давления серии DSP для HVAC heat ex

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Company Profile

Founded in 2011, Beijing aifanpeng Instrument Co., Ltd. is an enterprise integrating scientific research, manufacturing, sales, import and export trade and investment. Located in the beautiful Beijing of China. It is a comprehensive automation instrument enterprise with complete product categories and strong system integration ability.

The company adheres to the principle of good faith, with excellent products to provide high-quality services for the majority of users, and to provide perfect pre-sale, in-sales and after-sales integrated technical services for domestic and foreign users.

Product Description

DPS series adjustable differential pressure switch can be used in oil, water and air fluid engineering to detect the pressure
difference of filters, pumps, heat exchangers, chillers and coils. When the pressure difference (flow rate) in the system rises or falls When the set value is reached, an alarm is output or an alarm of the cut-off function is provided to the automatic control system. It can also be used to indicate the status of the pump or filter. The differential pressure switch with adjustable set point can be directly calibrated by the factory according to customer requirements, and the calibration value is printed on the product label, and the user does not need to make adjustments on site. Customers can calibrate through professional instruments according to the pressure difference required by the equipment.
The differential pressure switch with adjustable set point is installed at the inlet and outlet of the heat exchanger of the central air conditioning chiller. It can be used to detect the water flow of the heat exchanger. It is an accurate flow control method. It is based on the resistance and flow of the HVAC equipment. The curve design, we know that the heat exchanger, water filter, water pump and valve of HVAC equipment have performance curves of resistance and flow. We detect the difference between the inlet and outlet water pressure at both ends of the device and set it in advance with the device. The fixed value is compared to accurately control the flow. As a flow control switch, it has the characteristics of accurate flow control, no additional resistance to the system, no requirements on the pipe diameter and no disturbance of water flow disturbance. It can replace any form of target flow switch as the flow control of HVAC water system. Compared with the target type flow switch, it can avoid the false flow caused by the pump cavitation (the actual flow rate is large, but the water is mixed with air and the actual flow rate is not large), so it can be widely used in the use of brazed plate heat exchangers, casing Large and medium-sized air-cooled or water-cooled chillers with heat exchangers and shell-and-tube heat exchangers are used for water flow protection of the condenser and evaporator and also have the function of partial antifreeze protection..


Product name
Differential pressure switch
Maximum vlotage
250V AC
Maximum current
Normally open or normally closed (SPDT)
Differential pressure set value / return difference
Differential hysteresis
Maximum allowable static pressure
14 bar
Maximum allowable pressure difference
14 bar
Working medium
Oil / water / air  (other media please specify when ordering)
Working temperature
Set point repeatability deviation
Shell ingress protection
1/4" SAE (7/16"-20UNF)

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Packing & Shipping


Q1. Why choose IVAN?
A: Founded in 2011, IVAN is a leading manufacturer in the instrumentation industry, providing OEM & ODM services.

Q2. Could I get sample?
A: Yes, sample order is acceptable, but the sample cost and freight need to be charged.

Q3. What is the term of payment?
A: 100% payment in advance by T/T.

Q4. What is the delivery time of IVAN?
A: Generally, it will be 7-15 working days after receiving payment.

Q5. How about IVAN validity of quotation?
A: It is usually 30 days because the freight and exchange rates may fluctuate.

Q6. What is your normal delivery way?
A: Goods will be sent by DHL/FEDEX/UPS/EMS/TNT or other proposed forwarders.

Q7. How about the package?
A: Standard export wooden case or normal export carton.

Q8. Do you test all your goods before delivery?
A: Yes, we will test 100% before delivery.

If you have any questions, please feel free to contact us!

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