Differential pressure control switches ДЕМ-202М-РАСКО

Differential pressure control switches ДЕМ-202М-РАСКО (hereinafter – devices) are intended for signaling and relay control of differential pressure of operating medium by opening or closing electric contacts.

Scope of application:

• ventilation, air conditioning and cold supply systems;

• pump, compressor and turbine machine building;

• local automation systems at heat, water and power supply facilities.

Controlled medium is water, air, freons, oils and other liquids and gas, with a maximum viscosity of 0.8 Pa∙s, nonaggressive to the used structural materials.

Scope of application:

• ventilation, air conditioning and cold supply systems;

• pump, compressor and turbine machine building;

• local automation systems at heat, water and power supply facilities.

 

Devices are fit for operation under conditions established for version ОМ5 as per GOST 15150, bur for operation within the temperature range from minus 20 to plus 85°C.

Devices are fitted with electrical connector as per DIN 43650.

The devices are supplied with coupling thread М12х1.5, G1/4 and G1/2.

Guarantee period of storage is 18 months since the date of manufacture.

Guarantee service life is 12 months since the date of commissioning within the guarantee period of storage. – page 24 of the Catalog

GENERAL SPECIFICATIONS

1. Device designation, setpoint thresholds, basic error, actuation range and threshold return area value of devices are in compliance with those given in Table 1.

Table 1

Device designation	Setpoint thresholds*, MPa	Basic error, MPa, as maximum	Actuation range, MPa, as maximum	Return area uncontrollable, MPa,as maximum
ДЕМ-202М-РАСКО-01	0.01 to 0.6	± 0.04	0.006	0.04
ДЕМ-202М-РАСКО-02	0.01 to 0.25	± 0.03	0.006	0.02
ДЕМ-202М-РАСКО-03	0.007 to 0.15	± 0.02	0.004	0.02
* “Setpoint thresholds” – values of setpoints at which the requirements of technical conditions are satisfied for each device version.

Notes

1. Setting the device to a specific actuation setpoint shall be done by the manufacturer in compliance with the order.

2. The return area of devices is directed towards increase of the differential pressure in relation of the setpoint.

3. The customer is allowed to reset a setpoint within the range of values specified in Table 1. – page 24 of the Catalog

2. Maximum allowable differential pressure of the controlled medium is given in Table 2.

Table 2

Designation	Maximum allowable differential pressure of the controlled medium*, MPa
ДЕМ-202М-РАСКО-01 ДЕМ-202М-РАСКО-02 ДЕМ-202М-РАСКО-03	1.25
____________ * Maximum exposure duration is 5 min

3. Devices are designed for operation at contact loads specified in Table 3.

Table 3

Current type	Voltage, V	Current, A		cos j, minimum	Frequency, Hz
		min.	max.
DC	30	0.1	1	-	-
AC	250	1	10	0.6	50; 60

Page 25 of the Catalog

4. The devices are resistant to and preserve parameters under conditions of operating decreased temperature of minus 20°C and operating increased temperature of plus 85°C of ambient air.

5. As to dust or water ingress protection, devices are of version IP64.

6. Weight of the device is 1.5 kg as maximum.

Ordering information for ДЕМ-202М-РАСКО devices:

1) ДЕМ-202М-РАСКО device with setpoint threshold from 0.01 to 0.6 MPa with М-12х1.5 thread:

“Differential pressure control switch ДЕМ-202М-РАСКО-01 САФП.422319.001 ТУ”.

2) ДЕМ-202М-РАСКО device with setpoint threshold from 0.01 to 0.25 MPa with G1/2 thread:

“Differential pressure control switch ДЕМ-202М-РАСКО-02-G1/2 САФП.422319.001 ТУ”. – page 25 of the Catalog

OVERALL AND MOUNTING DIMENSIONS 

Figure 1 – Overall and mounting dimensions of ДЕМ-202М-РАСКО differential pressure control switches


ELECTRIC CIRCUIT DIAGRAM

Connector designation		Document designation
ХР1	XS1
Base as per EN 175301-803	Electric connector GDA4090S61 form А	EN 175301-803 (DIN43650)

Figure 2 – Electric circuit diagram of ДЕМ-202М-РАСКО differential pressure control switches