3-Speed Circulation Pump

3-Speed Circulation Pump adopts advanced wet-rotor structure, designed for liquid circulation in heating & air-conditioning open and closed systems. It delivers max flow 10m³/h and max head 12m, supporting liquid temperature up to 110℃ with 10bar maximum working pressure for stable continuous operation.

3-speed adjustable, flexible & energy-saving

Integrated wet rotor, no shaft seal, low leakage risk, easy maintenance

Low noise ≤45dB(A), stable long-time running

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Technical Data Sheet

Model	Power (W)	Q.max (m³/h)	H.max (m)	Unions DN1	Unions DN	Pump body material
DM20-40/130	65/50/32	2.5	4	1″	¾”	cast iron/brass/SS
DM25-40/130	65/50/32	2.8	4	1½”	1″	cast iron/brass/SS
DM25-40/180	65/50/32	2.8	4	1½”	1″	cast iron/brass/SS
DM32-40/180	65/50/32	3.2	4	2″	1¼”	cast iron/brass/SS
DM20-50/130	85/60/40	2.5	5	1″	¾”	cast iron/brass/SS
DM25-50/130	85/60/40	3	5	1½”	1″	cast iron/brass/SS
DM25-50/180	85/60/40	3	5	1½”	1″	cast iron/brass/SS
DM32-50/180	85/60/40	3.5	5	2″	1¼”	cast iron/brass/SS
DM20-60/130	100/70/55	2.5	6	1″	¾”	cast iron/brass/SS
DM25-60/130	100/70/55	3	6	1½”	1″	cast iron/brass/SS
DM25-60/180	100/70/55	3	6	1½”	1″	cast iron/brass/SS
DM32-60/180	100/70/55	3.5	6	2″	1¼”	cast iron/brass/SS
DM20-70/130	130/100/70	3	7	1″	¾”	cast iron/brass/SS
DM25-70/130	130/100/70	3.5	7	1½”	1″	cast iron/brass/SS
DM25-70/180	130/100/70	3.5	7	1½”	1″	cast iron/brass/SS
DM32-70/180	130/100/70	4	7	2″	1¼”	cast iron/brass/SS
DM25-80/180	245/190/135	6	8	1″	1½”	cast iron/SS
DM32-80/180	245/190/135	8	8	1¼”	2″	cast iron/SS
DM20-120/180	270/240/160	3.5	12	¾”	1″	cast iron/brass/SS
DM25-120/180	270/240/160	3.5	12	1″	1½”	cast iron/brass/SS

Model	Power (W)	Q.max (m³/h)	H.max (m)	Q.rated (m³/h)	H.rated (m)	Flange D1(mm)	Flange D2(mm)	Flange D3(mm)
DM32-50F/200	145/135/95	8	5	4.5	3	32	11.5	90
DM32-80F/200	245/190/135	8	8	4.5	4	32	11.5	90

Model	Power (W)	Q.max (m³/h)	H.max (m)	R.flow (m³/h)	R.head (m)	Flange D1(mm)	D2(mm)	D3(mm)	D4(mm)	D5(mm)	D6(mm)	B4(mm)
DM40-80F/220	245/190/135	8	8	4.5	4	40	17.5	32	110	100	150	62.5
DM40-80F/250	245/190/135	10	8	4	5	40	17.5	32	110	100	150	62.5

Materials

Pump casing: Cast iron, stainless steel optional; flange version with cast iron flange.
Impeller: Engineering plastic or stainless steel for high hydraulic efficiency and anti-cavitation.
Seal: Wet rotor design, no mechanical shaft seal, zero leakage risk; high-temperature resistant static rubber gasket.

Motor

Wet rotor canned motor, single-phase 220V, 3-speed adjustable for flow & head, energy saving.
Low noise, medium cooling, continuous stable operation.
IP54/IP44 protection, Class B/F insulation, IE3 high efficiency.

Applications

HVAC heating: Underfloor heating, radiator & boiler circulation.
Chilled water circulation for fan coils and small central air conditioning.
Domestic hot water recirculation.
Small industrial cooling and dilute medium circulation.
Threaded models for small pipelines; flange type (suffix F) for DN32/DN40 medium & large bore piping.