DPS series adjustable differential pressure switch is developed by
Ivan company according to the disadvantages of traditional
differential pressure switch, such as poor control accuracy. It is
an important series of control products of Ivan company. It has
compact shape, excellent performance and wide use medium.
Competitive price is the best choice to replace the traditional
differential pressure switch. DPS series adjustable differential
pressure switch can be used to detect the differential pressure of
filter, pump, heat exchanger, water chiller and coil in oil, water
and air fluid engineering. When the differential pressure (flow) in
the system rises or falls to the set value, an alarm or cut-off
function alarm is output to the automatic control system, which can
also be used to indicate the state of pump or filter. The
differential pressure switch with adjustable set point can be
directly calibrated by the factory according to the customer's
requirements, and the calibration value can be printed on the
product label. The user does not need to adjust it on site.
Customers can calibrate by professional instruments according to
the pressure difference required by the equipment, and the company
can provide relevant technical services. The differential pressure
switch with adjustable set point is installed at the inlet and
outlet of the heat exchanger of the central air conditioning water
chiller to detect the water flow of the heat exchanger. It is an
accurate flow control mode. It is designed according to the curve
of the resistance and flow of the HVAC equipment. We know that the
heat exchanger, water filter, water pump and valve of the HVAC
equipment have their resistance and flow performance curves. We
know that The water pressure difference between the two ends of the
device is detected and compared with the preset value of the device
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 requirement for pipe diameter and no
disturbance of water flow. It can replace any kind of target flow
switch as the flow control of HVAC water system. Compared with the
target flow switch, it can avoid the false flow caused by
cavitation of water pump (the actual flow rate is large, but the
water is mixed It can be widely used in large, medium and small
air-cooled or water-cooled chillers with brazed plate heat
exchanger, sleeve heat exchanger and shell and tube heat exchanger
as the water flow protection of condenser and evaporator, as well
as part of anti freezing protection. The pressure difference switch
with adjustable set point is installed at both ends of the filter.
When the filter is dirty and blocked, the pressure difference at
both ends exceeds the set value, the pressure difference switch
will automatically send a signal to remind the user to clean the
filter. For the automatic backwash filter, the signal with high
pressure difference will be provided to the control system to
automatically backwash the filter. The adjustable set point
differential pressure type flow switch is designed with hard
plastic shell and copper interface, which is applicable to the
differential pressure and flow control of oil, water and air. For
special application, please call Huayu company for relevant
consultation, and we will specially customize the fluid control
scheme for your application. Before installation, please confirm
that the pressure difference or flow you need to control is
consistent with the pressure difference or flow control of the
received pressure difference switch. Model dps100a Maximum voltage:
250VAC Maximum current 3A Output normally open or normally closed
optional (SPDT) P set value of differential pressure / return
difference 10-100kpa P return difference 3-7kpa Maximum allowable
static pressure: 14 bar Maximum allowable differential pressure 14
bar Working medium: Oil / water / air (please specify other medium
when ordering) Working temperature - 20 ℃ ~ 93 ℃ Set point
repeatability deviation ± 1% Protection class of enclosure: IP54
Connector 1 / 4 "SAE (7 / 16" - 20unf) position A proper pressure
measuring position of the differential pressure switch is very
important to ensure the accuracy of the pressure difference
measurement value and avoid the blockage of the connecting pipe of
the differential pressure switch. If necessary, place the pressure
tap on the upper part of the pipe along the water flow direction
and set a 60 mesh filter screen to avoid the blockage of the
pressure tap. When installing, try to be close to the inlet and
outlet of the filter, HVAC heat exchanger and fluid pump as the
pressure tap, as shown in Figure 5 。 The installation position of
the differential pressure switch shall be considered to avoid the
connection copper pipe of the differential pressure switch from
frost crack when the outdoor temperature is low in winter. If
necessary, the water pipe and copper shell connecting the
differential pressure switch shall be insulated and the electric
heating wire shall be added. install 1. Drill a hole in the pipe,
weld 1 / 4 "SAE interface, and the copper pipe extending into the
pipe should preferably be 90 along the water flow direction, so as
to avoid the use of impurities in the sewage filter to block the
pressure difference switch. See Fig. 5. connection 1. The
adjustable differential pressure switch is directly output to the
terminal block in the junction box, and users can conduct internal
connection and external connection according to their own
application. On the junction box, the user must also provide
appropriate cable and 1 / 2 "NPT cable waterproof connector. 2. The
output contact of the differential pressure switch is allowed to
pass through the current resistive load of 3a, and the inductive
load of 1a.
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Beijing Ifan Peng Instrument Co., Ltd.
Beijing Ifan Peng Instrument Co., Ltd.
Verified Supplier
2 Years
