DOOCH Co., Ltd.

Stainless steel pumps, inverter booster systems and pump-specific VFDs

LISTEDMANUFACTURER

Hwaseong, Gyeonggi-do, South Korea

About

DOOCH manufactures energy-saving electronically controlled pumps and industrial pumps: inverter booster systems, vertical multistage and in-line pumps, horizontal pumps, submersible and wastewater pumps, firefighting pumps, and its own pump inverters and controllers.

Founded in 1998, the company developed pump-specific inverters and control units in its own research lab and opened a roughly 3,000-pyeong (about 9,900 m²) plant in Hwaseong, Gyeonggi-do in October 2007 for booster pumps and inverter controls.

It states it was the first in Korea to obtain NEP (New Excellent Product) certification for a booster pump and holds public-procurement excellent product status; it exports under the dooch brand.

Products

Inverter Booster Pump Systems

Packaged water-pressure boosting systems that combine the company's stainless multistage pumps with its own pump inverters and controllers, from compact single-phase 2-pump sets to 6-pump packages.

Key features

Individual-inverter, multi-inverter and single-inverter panel designs
2 to 6 pumps per package
Constant discharge pressure with energy saving
Company-developed pump VFDs and controllers
Compact sets for single-phase supply

Applications

Apartment and building water supply
Industrial water supply
Irrigation
Cooling and HVAC systems

Up to 1,440 m³/h, 249 m head, 16 bar; 0.37–75 kW

15 models

Model	Series / type	Max. flow	Max. head	Max. pressure	Motor power
NSQ Series	Individual-inverter booster system	780 m³/h	245 m		0.75–22 kW
NSQP Series	Individual-inverter booster system	780 m³/h	245 m		0.75–22 kW
XQP Series	Individual-inverter booster system	780 m³/h	245 m		0.75–22 kW
MQ Series (MQ-BOOSTER)	Multi-inverter booster system, 2–6 pumps	780 m³/h	245 m	16 bar	0.75–22 kW
(N)747D Series	Single-inverter panel booster, 2–6 vertical pumps	1,440 m³/h	249 m	16 bar	0.75–75 kW
NSQP-2(3)DHF(T) Series	Compact inverter booster	87 m³/h	68 m	16 bar	0.75–7.5 HP
NSQ-2(3)DHF(T) Series	Compact inverter booster	87 m³/h	68 m		0.75–7.5 HP (3-ph) / 0.75–3 HP (1-ph)
NSQ-2(3)DHM Series	Compact inverter booster	81 m³/h	29 m		0.37–2.2 kW
NSQP-2DHF Series	Compact inverter booster, stainless	56 m³/h	79 m		0.55–7.5 kW
NSQ-2DHF Series	Compact inverter booster, 2 or 3 pumps	56 m³/h	79 m		0.75–10 HP (3-ph) / up to 3 HP (1-ph)
2NSQ	Compact inverter booster, 2 or 3 pumps	48 m³/h	43 m		0.75–10 HP (3-ph) / up to 3 HP (1-ph)
NSQ-2DHM Series	Compact inverter booster	48 m³/h	43 m		0.55–2.2 kW
2SQ	Compact inverter booster, single-phase	48 m³/h	43 m		0.55–1.5 kW
SQ-2DHF(T) Series	Compact inverter booster, single-phase	58 m³/h	55 m		0.55–1.5 kW
SQ-2DHM	Compact inverter booster, single-phase	25 m³/h	29 m		0.37–1.5 kW

Vertical Multistage and In-line Pumps

Stainless vertical multistage centrifugal pumps (XR/XRL), single-stage in-line pumps (DP) and versions with integrated pump drives, plus a compact hot-water circulator.

Key features

XR(L) multistage up to 245 m head
Integrated-VFD versions (XQ, NSQ)
DP in-line pumps up to 132 kW
DPC circulator for -10 to 110°C water
Stainless wetted parts

Applications

Boosting and water supply
HVAC circulation
Industrial process water
Hot water systems

Up to 750 m³/h, 245 m head, 30 bar; 0.37–132 kW

Model	Series / type	Max. flow	Max. head	Max. pressure	Motor power
XR(L) Series	Vertical multistage centrifugal	0.7–130 m³/h	245 m		0.37–45 kW
XQ-XR(L) Series	Vertical multistage with integrated VFD	130 m³/h	245 m	30 bar	0.75–22 kW
NSQ-XR(L) Series	Vertical multistage with integrated VFD	130 m³/h	245 m		0.75–22 kW
DP Series	Single-stage in-line centrifugal	750 m³/h	107 m	16 bar	0.75–132 kW
XQ-DP Series	In-line with integrated VFD	480 m³/h	83 m		0.75–22 kW
NSQ-DP Series	In-line with integrated VFD	480 m³/h	83 m		0.75–22 kW
DPC Series	Hot water circulation (-10 to 110°C)	20 m³/h	18 m	10 bar	80–750 W

Horizontal and Inverter Pumps

Horizontal multistage (DHF) and single-stage (DHM) stainless pumps, their inverter-equipped versions with SQ/NSQ drives, and self-priming household/light-commercial units.

Key features

DHF multistage and DHM single-stage hydraulics
Built-in SQ (single-phase) or NSQ drives
Self-priming JQ/JPA units
Constant-pressure operation
Stainless steel construction

Applications

Domestic and small building water supply
Light industrial water transfer
Horticultural irrigation

Up to 400 m³/h, 80 m head, 10 bar; 0.37–7.5 kW

14 models

Model	Series / type	Max. flow	Max. head	Max. pressure	Motor power
DHF	Horizontal multistage	13 m³/h	80 m	10 bar	0.75–2.9 kW
DHF(T) Series	Horizontal multistage	13 m³/h	80 m	10 bar	0.75–2.9 kW
DHM	Horizontal single-stage	400 m³/h	40 m	8 bar	0.75–2.2 kW
DHM Series	Horizontal single-stage	400 m³/h	40 m	8 bar	0.75–2.2 kW
NSQ-DHF	Inverter horizontal multistage	32 m³/h	79 m	10 bar	0.75–7.5 kW
NSQ-DHF(T) Series	Inverter horizontal multistage	29 m³/h	68 m		0.55–5.5 kW
NSQ-DHM Series	Inverter horizontal single-stage	27 m³/h	29 m		0.37–2.2 kW
NSQ	Inverter pump	32 m³/h	78 m		0.75–2.2 kW
SQ-DHF	Inverter pump, single-phase	13 m³/h	63 m	10 bar	0.75–1.5 kW
SQ-DHF(T) Series	Inverter horizontal multistage, single-phase	29 m³/h	55 m		0.55–1.5 kW
SQ-DHM Series	Inverter horizontal single-stage, single-phase	24 m³/h	29 m		0.37–2.2 kW
SQ	Inverter single-stage, single-phase	15 m³/h	40 m	10 bar	0.75–1.1 kW
JQ600M	Inverter self-priming	3 m³/h	42 m	6 bar	0.55 kW
JPA600M	Automatic self-priming	3 m³/h	42 m	6 bar	0.55 kW

Volute, Turbine, Wesco and Firefighting Pumps

Industrial and firefighting pumps: end-suction volute pumps, multistage turbine pumps, engine-driven fire pumps, direct-coupled Wesco pumps and agricultural pumps.

Key features

DSV volute pumps to 110 kW
DT multistage turbine pumps to 200 kW
DTE engine-driven fire pumps to 281 kW
DW Wesco pumps for high head at low flow

Applications

Firefighting systems
Waterworks
Industrial plants
Agriculture

Up to 360 m³/h, 202 m head; up to 281 kW

Model	Series / type	Max. flow	Max. head	Motor power
DSV	Volute (end-suction) pump	360 m³/h	85 m	0.75–110 kW
DW Series	Direct-coupled Wesco pump	0.1 m³/min	202 m	2.2–7.5 kW
DT Series	Multistage turbine pump (fire / industrial)	300 m³/h	200 m	1.5–200 kW
DTE Series	Firefighting engine pump	300 m³/h	200 m	1.5–281 kW
DA Series	Agricultural / industrial pump, IP55	28 m³/h	29 m	600–1,500 W

Submersible, Deep-Well and Wastewater Pumps

Submersible pumps for deep wells, drainage and sewage, stainless immersion multistage pumps for machine-tool coolant, and a packaged wastewater lifting system.

Key features

DSJ deep-well pumps for installation depth to 600 m
DRK stainless immersion multistage pumps
NDS drainage and sewage pumps from 300 W to 15 kW
DPS wastewater package with controller

Applications

Wells and groundwater
Building drainage and sewage
Machine-tool coolant
Construction dewatering

Up to 145 m³/h, 300 m head; 300 W–92 kW

Model	Series / type	Max. flow	Max. head	Max. pressure	Motor power
DSJ Series	Deep-well submersible (to 600 m depth)	145 m³/h	300 m	30 bar	0.37–92 kW
DRK Series	Immersion multistage, stainless (machine-tool coolant)	65 m³/h	248 m	26 bar	0.55–45 kW
NDS Series	Submersible wastewater / drainage	105 m³/h	57 m		2.2–15 kW
NDS-B-M(A)	Submersible drainage, single-phase	550 L/min	21 m	16 bar	0.4–1.5 kW
NDS-V-M(A)	Submersible sewage, single-phase	350 L/min	18 m	16 bar	0.4–1.5 kW
NDS-03B	Small portable submersible drainage, single-phase	8 m³/h	10 m		300 W
NDS-03V	Small portable submersible sewage, single-phase	10 m³/h	9 m		300 W
DPS Series	Wastewater package system with controller	2.4 m³/min	36 m		0.4–5.5 kW

Pump Inverters and Booster Controllers

Pump-specific variable frequency drives and multi-pump controllers developed in-house, used in the company's booster systems and for retrofit to existing pumps.

Key features

Pump-specific VFDs (SQ, NSQ, XQ)
Multi-pump control up to 6 pumps
Hydraulic and electrical pump protection
IP55, motor- or wall-mounted
RS485 / internet communication

Applications

Booster set retrofits
Constant-pressure water supply
Circulation pump control

0.55–75 kW; IP55; RS485

Model	Series / type	Motor power
MQ-DRIVE	Multi-pump controller/inverter (up to 6 pumps), RS485	0.75–22 kW
NSQ-DRIVE	Pump-specific VFD, IP55, motor-mount or wall	0.75–22 kW
SQ-DRIVE	Single-phase pump VFD, IP55	0.55–1.1 kW
XQ-DRIVE	Premium pump VFD with 3.5" colour LCD, IP55	0.75–22 kW
N747D Controller	Booster controller for up to 6 pumps	0.75–75 kW

Company facts

Country: South Korea
Founded: 1998
Business registration: Not provided
Certifications: NEP (New Excellent Product)

Product lines

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DOOCH Co., Ltd.

About

Products

Inverter Booster Pump Systems

Key features

Applications

Vertical Multistage and In-line Pumps

Key features

Applications

Horizontal and Inverter Pumps

Key features

Applications

Volute, Turbine, Wesco and Firefighting Pumps

Key features

Applications

Submersible, Deep-Well and Wastewater Pumps

Key features

Applications

Pump Inverters and Booster Controllers

Key features

Applications

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