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M2 PDC DN25

2-WAY UNMIXED PUMP UNIT WITH FLOWMETER

The unit for 1” (180 mm) circulating pumps consists of:

Supply
• Connection.
• Flanged ball valve with T-handle.
• High efficiency synchronous pre-wired circulating pump (for the models that include it).
• Flanged ball valve supplied with in-handle thermometer (red ring, range 0°C-120°C).

Return
• Flanged ball valve with 20 mbar check valve (which can be excluded by rotating the handle by 45°) supplied with in-handle thermometer (blue ring; 0°C-120°C).
• Straight flowmeter with flow regulation, 1”1/2 male threaded. Direct reading of the flowrate through the graduated scale.
• Flanged ball valve with T-handle.
• Connection.

Centre distance 125 mm. EPP insulation box (Dimensions: 250x380x170 mm).
PN 10, max temperature 110°C (unit without pump).
External connections: 1” Female.

FIELD OF USE
For power up to 39 kW (with ∆t 20 K) and maximum flow rate 1700 l/h.
Kvs Value: 6.2. Approximate data calculated with a 6 m head circulating pump.

Available circulating pumps:
Wilo Para 25/6 SC
Grundfos UPM3S Auto 25-60
Wilo Para 25/8 SC 

Flow rate ranges
42 = 5-42 l/min

Code
Specifications
External connections
Circulator
20355R-42 G 1" Female -
20355R-42-P6 G 1" Female Wilo Para 25/6 SC
20355R-42-A6 G 1" Female Grundfos UPM3S Auto 25-60
20355R-42-P8 G 1" Female Wilo Para 25/8 SC