Circulation Pump - Leaqua – R&D-Focused Water Tank Engineering Specialist

Single-Stage Vertical Inline Centrifugal Pump

Introduction

EC series single-stage vertical inline pumps feature in-line suction and discharge ports on the same axis, allowing direct installation into piping systems. Compact design, high efficiency, and low noise. Ideal for HVAC, district heating, cooling towers, boiler feed, and industrial circulation.

Product Advantages

Flow up to 750 m³/h
Head up to 55 m
Motor 0.37–200 kW, IP55
Insulation class F/H, 2900/1450 rpm
Max working pressure: PN12/PN16 bar
Liquid: -15°C to +105°C
Flange connection per PN16 (GB/T17241.6)
Cast iron / stainless steel impeller options

Typical Applications

HVAC air conditioning
District heating
Cooling tower circulation
Boiler feed water
Industrial liquid transfer
Water supply boosting
Closed loop systems
Heat exchange circuits

Performance Overview by Model

Model	Rated flow (m³/h)	Rated flow (l/s)	Flow range (m³/h)	Max head (m)	Motor power (kW)	Max pressure (bar)	Flange size
EC32-18/2	32	8.9	15–45	18	5.5–7.5	12	DN32
EC40-18/2	40	11.1	20–60	18	7.5–11	12	DN40
EC50-18/2	50	13.9	25–80	18	11–15	12	DN50
EC65-36/2	65	18.1	30–100	36	7.5–10	12	DN65
EC65-48/2	65	18.1	30–100	48	10–15	12	DN65
EC80-40/2	80	22.2	40–120	40	11–15	12	DN80
EC80-48/2	80	22.2	40–120	48	15–20	12	DN80
EC100-9/2	100	27.8	50–150	9	2.2–3.0	16	DN100
EC100-15/2	100	27.8	50–150	15	5.5–7.5	16	DN100
EC100-17/2	100	27.8	50–150	17	7.5–11	16	DN100
EC100-22/2	100	27.8	50–150	22	11–15	16	DN100
EC100-27/2	100	27.8	50–150	27	15–18.5	16	DN100
EC100-33/2	100	27.8	50–150	33	18.5–22	16	DN100
EC100-40/2	100	27.8	50–150	40	22–30	16	DN100
EC100-48/2	100	27.8	50–150	48	30–37	16	DN100
EC100-52/2	100	27.8	50–150	52	37–45	16	DN100
EC125-11/4	125	34.7	60–200	11	5.5–7.5	16	DN125
EC125-14/4	125	34.7	60–200	14	7.5–10	16	DN125
EC125-18/4	125	34.7	60–200	18	11–15	16	DN125
EC125-22/4	125	34.7	60–200	22	15–18.5	16	DN125
EC125-28/4	125	34.7	60–200	28	18.5–22	16	DN125
EC125-32/4	125	34.7	60–200	32	22–30	16	DN125
EC125-40/4	125	34.7	60–200	40	30–37	16	DN125
EC125-48/4	125	34.7	60–200	48	37–45	16	DN125
EC150-50/4	150	41.7	80–250	50	45–55	16	DN150
EC200-12.5/4	200	55.6	120–320	12.5	22–30	16	DN200
EC200-20/4	200	55.6	120–320	20	30–40	16	DN200
EC200-23/4	200	55.6	120–320	23	37–50	16	DN200
EC200-29/4	200	55.6	120–320	29	45–60	16	DN200
EC200-32/4	200	55.6	120–320	32	55–75	16	DN200
EC200-38/4	200	55.6	120–320	38	55–75	16	DN200
EC200-47/4	200	55.6	120–320	47	75–100	16	DN200
EC200-50/4	200	55.6	120–320	50	90–120	16	DN200
EC250-12.5/4	250	69.4	150–450	12.5	30–40	16	DN250
EC250-14/4	250	69.4	150–450	14	37–50	16	DN250
EC250-15/4	250	69.4	150–450	15	30–40	16	DN250
EC250-17/4	250	69.4	150–450	17	45–60	16	DN250
EC250-18/4	250	69.4	150–450	18	37–50	16	DN250
EC250-20/4	250	69.4	150–450	20	55–75	16	DN250
EC250-21/4	250	69.4	150–450	21	45–60	16	DN250
EC250-27/4	250	69.4	150–450	27	55–75	16	DN250
EC250-30/4	250	69.4	150–450	30	75–100	16	DN250
EC250-32/4	250	69.4	150–450	32	90–120	16	DN250
EC250-36/4	250	69.4	150–450	36	75–100	16	DN250
EC250-38/4	250	69.4	150–450	38	90–120	16	DN250
EC250-44/4	250	69.4	150–450	44	90–120	16	DN250
EC250-45/4	250	69.4	150–450	45	110–150	16	DN250
EC250-50/4	250	69.4	150–450	50	132–175	16	DN250
EC250-53/4	250	69.4	150–450	53	110–150	16	DN250
EC300-15/4	300	83.3	180–600	15	55–75	16	DN300
EC300-20/4	300	83.3	180–600	20	75–100	16	DN300
EC300-25/4	300	83.3	180–600	25	90–120	16	DN300
EC300-30/4	300	83.3	180–600	30	110–150	16	DN300
EC300-35/4	300	83.3	180–600	35	132–160	16	DN300
EC300-44/4	300	83.3	180–600	44	160–200	16	DN300
EC300-55/4	300	83.3	180–600	55	200–250	16	DN300

Materials of Construction (EC series)

Component	Material (standard)	Material (optional)
Pump casing	Cast iron HT200	Stainless steel
Impeller	Cast iron / Stainless steel AISI304	AISI316
Pump shaft	Stainless steel 20Cr13 (AISI420)	AISI304/316
Mechanical seal	Graphite / Silicon carbide	Tungsten carbide
O-ring / gasket	EPDM	Viton / NBR
Coupling	Nodular cast iron QT500-7	—

Medium Compatibility & Application Notes

Medium type	Conditions	Cast iron version	Stainless steel version
Clean water / softened water	-15°C to +105°C	✓ suitable	✓ suitable
Hot water (heating systems)	≤105°C	✓ with EPDM seals	✓ recommended
Ethylene glycol / coolant	≤50% concentration	✓ compatible	✓ compatible
Mildly corrosive industrial water	pH 5–9	✓ consult	✓ SS304/316
Strong corrosive fluids	acid/alkali	✗ not recommended	✓ consult factory
For special applications (high temperature >105°C, aggressive media, or VFD operation), please contact Mingxing engineering for seal and material recommendations.

Mounting Dimensions & Weight (Reference)

Model	Flange DN	Length L (mm)	Height H (mm)	Weight (kg)	Motor power (kW)
EC65-36/2	DN65	440	520	87	7.5
EC80-40/2	DN80	500	590	172	11
EC100-33/2	DN100	550	660	184	15
EC125-40/4	DN125	650	760	238	30
EC200-50/4	DN200	850	1000	637	90
EC250-53/4	DN250	950	1200	1065	132
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