1 DIFFERENTIAL PRESSURESWITCH TYPE DR 1 DR 2

1 DIFFERENTIAL PRESSURESWITCH TYPE DR 1 DR 2 MA-TER S. r. l.

Differential Pressureswitch (DR) 2 DR – designed to measure low differential pressure also when there are high static pressures … MA-TER

Connections 3 2 DR 2 model • • • DR 1 model • • Relative Pressure contacts 1 pressure inlet 2 output signal SPDT 3 Differenti al Pressure contacts 1 1 pressure inlet 3 output signal SPDT Negative pressure inlet Compa ct design Swivel connectio ns 1 Positive pressure inlet MA-TER

Example of typical application 4 LEGEND: 1) System to control 2) Pumping system 3) DR Pressureswitch 4) Load loss system MA-TER

Working characteristics 5 Relative pressure range 0, 1 – 3 bar Differential pressure range 20 – 1000 mbar Environment temperature -20° /+ 85°C Fluid temperature 0 – 100°C Not affected by frost MA-TER

Physical characteristics 6 Body PPS Diaphragm Silicone (VMQ) Connection Brass CW 614 N EN 12164 Spring Steinless steel IP 00 IP 44 with connector inserted IP 54 with cover and connector inserted MA-TER

Working connections 7 Hydraulic Inlet positive pressure 1/8” ISO 228 M 1/4” ISO 228 M 7/16" UNF 20 fil/1"-2 A M 3/8” ISO 228 M 1/2” ISO 228 M Inlet negative pressure 1/8” ISO 228 M 1/4” ISO 228 M/F 7/16" UNF 20 fil/1"-2 A M 3/8” ISO 228 M Electrical Tab terminal male 6, 3 x 0, 8 mm (SPDT – SPST-NO/NC) MA-TER

Electrical rating and Homologations 8 Voltage Current IP 250 Vac 5 A or 0, 1 A IP 00 – IP 44 with connector inserted 125 Vac 5 A or 0, 1 A IP 00 – IP 44 with connector inserted MA-TER

Comparative DR 1 -DR 2 9 DR 1 WORKING CHARACTERISTICS Differential pressure range 20 – 1000 mbar Relative pressure range NOT PRESENT Environment temperature -20 ÷ 85°C Fluid temperature 0 ÷ 100°C Static pressure on both 12 bar sides 7 bar Unilateral static pressure SPDT SPST-NO / SPSTElectrical scheme NC DR 2 WORKING CHARACTERISTICS Differential pressure range 20 – 1000 mbar Relative pressure range 0, 1 – 3 bar Environment temperature -20 ÷ 85°C Fluid temperature 0 ÷ 100°C Static pressure on both 12 bar sides 7 bar Unilateral static pressure SPDT SPST-NO / SPSTElectrical scheme NC MA-TER

Applications 10 • House heating System • Heating Pumps • Cooling Systems • Oleodynamic and Pneumatic • … wherever differential pressure control is needed MA-TER

Dimensions 11 DR 2 MA-TER

Optionals 12 MA-TER

Executions MA-TER 13 connector Silicon or NBR cover IP 54 – with cover and connector inserted connector IP 44 – with connector inserted