ACHK Multistage Immersion Pumps-Multistage Immersion Pumps-Suzhou Weidoya Automation Electrical Equipment Co., Ltd.-Lubrication, Cooling & Intelligent Sensing

ACHK Multistage Immersion Pumps

ACHK multistage centrifugal pumps provide medium pressure for high-precision, high-performance machine tools, primarily for workpiece cooling and cleaning. Their compact design suits installations with limited space.

This pump is suitable for coolant systems on NC/CNC lathes, machining centres and grinding machines, as well as industrial washing machines and filtration systems. Key wetted components are stainless steel. An integral FKM fluoroelastomer mechanical seal provides heat resistance and durability.

Inquiry

Stainless steel type.

ACHK SERIES

①	MODEL
②	Rated flow (m³/h) 2,4,8,10
③	Number of pump stages × 10.
④	Number of impeller stages.
⑤	Mechanical seal material SC:Sic+Carbon, ST:Sic+T/C, TT:T/C+T/C
⑥	Voltage: 2/2: 200/220 V; 2/3: 220/380 V; 4/4: 415/440 V.

» Performance range.

» Scope of application.

• ACHK multistage centrifugal pumps provide medium pressure for high-precision, high-performance machine tools, primarily for workpiece cooling and cleaning.
The ACHK series has a compact design for installations with limited space.
• This pump is suitable for coolant systems on NC/CNC lathes, machining centres and grinding machines, as well as industrial washing machines and filtration systems. Key wetted components are stainless steel. An integral FKM fluoroelastomer mechanical seal provides heat resistance and durability.

» Fluid.

• Use clean, low-viscosity, non-explosive liquids that contain no solid particles, abrasive sediment or fibers and will not damage the pump.
If the liquid’s specific gravity or viscosity exceeds that of water-soluble cutting fluid, increase motor power appropriately.

» Pump.

• For a deeper oil tank or container, an empty chamber can be used to adjust the pump immersion depth.

Note)More empty chambers may result in a greater pressure drop. Install a baffle between the tank outlet and inlet to prevent discharged fluid from returning directly to the suction line and to limit contamination-related loss of suction.

» Motor.

• This pump uses a standard fan-cooled motor whose main specifications follow general standards.

- Protection rating: IP54
- Insulation class: F
- 50 Hz standard voltage:Three-phase 200/380, 415 V.
- 60 Hz standard voltage:Three-phase 220/380, 440 V.

• We use high-efficiency motors for ratings above 750 W. Motors with non-standard supply voltages or other high-efficiency motors can be made to customer requirements; motor specifications and external dimensions may change.

• The three-phase motor must be connected to a standards-compliant starter box.

Higher ambient temperature

When installing the motor at ambient temperatures above 40°C or altitudes above 1000 metres, reduced air density can impair cooling. Motor output must therefore be derated below its rated power.

As shown in the P2 chart above, pump performance is reduced to 80% when installed at an altitude of 3500 m and an ambient temperature of 60°C.

» Noise.

MOTOR [Kw]	Sound pressure level [dB(A)]
MOTOR [Kw]	50 Hz	60 Hz
0. 37	< 70	< 70
0. 55	< 70	< 70
0. 75	< 70	< 70
1. 1	< 70	71

» Mechanical shaft seal.

• Actual operating range depends on operating pressure, pump type, mechanical-seal specification and liquid temperature.

Seal division	Max. pressure	Max. Temperature(℃)
TC/Sic Viton(FKM)	2.5 MPa	0 ~ 120

» Installation precautions.

• ACHK series pumps must be installed vertically; horizontal installation is not permitted.

• The minimum level is designed to be 20 mm above the bottom of the strainer.
• The built-in screw can pump only when the 40 mm space between the top and the underside of the strainer is filled with liquid, preventing seal damage from dry running.
• Maintain at least 25 mm clearance between the bottom of the pump and the tank floor.

ACHK 2 – 50Hz

» Performance curve (water-soluble cutting oil).

Electrical data 3Ø, 200V / 220V / 380V / 415V, 50Hz

Type.	Number of impeller stages.	Motor Power [Kw]	CURRENT [ A ]	Motor efficiency. [ % ]
ACHK 2-××/1	1	0.37	2.6/2.4/1.4/1.2	68
ACHK 2-××/2	2	0.37	2.6/2.4/1.4/1.2	68
ACHK 2-××/3	3	0.55	3.1/2.8/1.6/1.4	73
ACHK 2-××/4	4	0.75	3.1/2.8/1.6/1.4	73
ACHK 2-××/5	5	0.75	4.0/3.6/2.1/1.9	80.7
ACHK 2-××/6	6	1.1	4.0/3.6/2.1/1.9	80.7
ACHK 2-××/7	7	1.1	5.3/4.8/2.8/2.6	82.7
ACHK 2-××/8	8	1.1	5.3/4.8/2.8/2.6	82.7
ACHK 2-××/9	9	1.5	5.5/5.0/2.9/2.7	82.7
ACHK 2-××/10	10	1.5	5.5/5.0/2.9/2.7	82.7

ACHK 2 – 60Hz

» Performance curve (water-soluble cutting oil).

Electrical data 3Ø, 200V / 220V / 380V / 440V, 60Hz

Type.	Number of impeller stages.	Motor Power [Kw]	CURRENT [ A ]	Motor efficiency. [ % ]
ACHK 2-××/1	1	0.37	2.4/2.2/1.3/1.1	68
ACHK 2-××/2	2	0.37	2.4/2.2/1.3/1.1	68
ACHK 2-××/3	3	0.55	3.0/2.7/1.6/1.4	73
ACHK 2-××/4	4	0.75	4.0/3.6/2.1/1.9	77
ACHK 2-××/5	5	0.75	4.0/3.6/2.1/1.9	77
ACHK 2-××/6	6	1.1	5.3/4.8/2.8/2.6	84
ACHK 2-××/7	7	1.1	5.6/5.0/2.9/2.7	84
ACHK 2-××/8	8	1.1	5.9/5.3/3.1/2.9	84

ACHK 4 – 50Hz

» Performance curve (water-soluble cutting oil).

Electrical data 3Ø, 200V / 220V / 380V / 415V, 50Hz

Type.	Number of impeller stages.	Motor Power [Kw]	CURRENT [ A ]	Motor efficiency. [ % ]
ACHK 4-××/1	2	0.37	2.6/2.4/1.4/1.2	68
ACHK 4-××/2	3	0.37	2.6/2.4/1.4/1.2	68
ACHK 4-××/3	4	0.55	3.1/2.8/1.6/1.4	73
ACHK 4-××/4	5	0.55	3.1/2.8/1.6/1.4	73
ACHK 4-××/5	6	0.75	4.0/3.6/2.1/1.9	80.7
ACHK 4-××/6	7	0.75	4.0/3.6/2.1/1.9	80.7

ACHK 4 – 60Hz

» Performance curve (water-soluble cutting oil).

Electrical data 3Ø, 200V / 220V / 380V / 440V, 60Hz

Type.	Number of impeller stages.	Motor Power [Kw]	CURRENT [ A ]	Motor efficiency. [ % ]
ACHK 4-××/1	1	0.55	3.0/2.7/1.6/1.4	73
ACHK 4-××/2	2	0.75	4.0/3.6/2.1/1.9	77
ACHK 4-××/3	3	1.1	5.3/4.8/2.8/2.6	84
ACHK 4-××/4	4	1.1	5.3/4.8/2.8/2.6	84

ACHK 8 – 50Hz

» Performance curve (water-soluble cutting oil).

Electrical data 3Ø, 200V / 220V / 380V / 415V, 50Hz

Type.	Number of impeller stages.	Motor Power [Kw]	CURRENT [ A ]	Motor efficiency. [ % ]
ACHK 8-10/1	1	0.55	3.1/2.8/1.6/1.4	73.0
ACHK 8-10/2	2	0.75	4.0/3.6/2.1/1.9	80.7
ACHK 8-10/3	3	1.1	5.3/4.8/2.8/2.6	84.0
ACHK 8-10/4	4	1.5	7.2/7.2/4.2/4.0	84.2
ACHK 8-10/5	5	2.2	9.8/9.8/5.7/5.4	85.9
ACHK 8-10/6	6	2.2	9.8/9.8/5.7/5.4	85.9
ACHK 8-10/7	7	2.2	9.8/9.8/5.7/5.4	85.9
ACHK 8-10/8	8	2.9	12.5/12.5/7.2/6.8	85.9

ACHK 8 – 60Hz

» Performance curve (water-soluble cutting oil).

Electrical data 3Ø, 200V / 220V / 380V / 440V, 60Hz

Type.	Number of impeller stages.	Motor Power [Kw]	CURRENT [ A ]	Motor efficiency. [ % ]
ACHK 8-10/1	1	0.55	3.0/2.7/1.6/1.4	73.0
ACHK 8-10/2	2	0.9	5.3/4.8/2.8/2.6	84.0
ACHK 8-10/3	3	2.2	9.6/8.7/5.0/4.5	86.5
ACHK 8-10/4	4	2.2	9.6/8.7/5.0/4.5	86.5
ACHK 8-10/6	6	2.9	12.5/11.6/6.4/6.1	86.5
ACHK 8-10/7	7	4.0	17/15.4/8.9/8.5	88.5
ACHK 8-10/8	8	4.0	17/15.4/8.9/8.5	85.5

ACHK 10 – 50Hz

» Performance curve (water-soluble cutting oil).

Electrical data 3Ø, 200V / 220V / 380V / 415V, 50Hz

Type.	Number of impeller stages.	Motor Power [Kw]	CURRENT [ A ]	Motor efficiency. [ % ]
ACHK10-10/1	1	1.1	5.3/4.8/2.8/2.6	82.7
ACHK10-10/2	2	1.1	5.3/4.8/2.8/2.6	82.7
ACHK10-10/3	3	2.2	9.8/9.8/57/5.4	85.9
ACHK10-10/4	4	2.9	12.5/12.5/7.2/6.8	85.9
ACHK10-10/5	5	2.9	12.5/12.5/7.2/6.8	85.9
ACHK10-10/6	6	4.0	17.2/17.2/10/9.5	88.1

ACHK 10 – 60Hz

» Performance curve (water-soluble cutting oil).

Electrical data 3Ø, 200V / 220V / 380V / 440V, 60Hz

Type.	Number of impeller stages.	Motor Power [Kw]	CURRENT [ A ]	Motor efficiency. [ % ]
ACHK10-10/1	1	1.1	5.3/4.8/2.8/2.6	84.0
ACHK10-10/2	2	2.2	9.6/8.7/5.0/4.5	86.5
ACHK10-10/3	3	2.9	12.5/11/6.4/6.1	86.5
ACHK10-10/4	4	4.0	17/15.4/8.9/8.5	88.5