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

ACRK Multistage Immersion Pumps

ACRK high-head multistage centrifugal pumps suit high-precision, high-performance machine tools requiring high pressure, primarily for workpiece cooling and cleaning.

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.

ACRK SERIES

①	MODEL
②	Rated flow (m³/h) 1, 2, 3, 4, 5, 10, 15
③	Number of pump stages × 10. Number of impeller stages.
④	Discharge outlet shape. F:Flange Type B:Screw Type
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.
⑦	IV: use of a variable-frequency drive (option).

» Performance range.

» Scope of application.

• ACRK high-head multistage centrifugal pumps suit high-precision, high-performance machine tools requiring high pressure, primarily for workpiece cooling and cleaning.

• 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 without solid particles, abrasive sediment or fibres, and compatible with pump materials. If fluid density 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
1. 5	< 70	71
2. 2	< 70	71
2. 9	73	71
4. 0	73	78
5. 5	73	78
7. 5	73	78

» Mechanical shaft seal.

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

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

» Installation precautions.

① Extension chamber

• ACRK pumps use empty impeller chambers to extend immersion depth, but adding empty chambers reduces pump performance.

PUMP TYPE	A mm
ACRK 1, 2, 3	54
ACRK 4, 5	60
ACRK 10	79
ACRK 15	90

• Set the minimum operating liquid level at least A mm above the bottom.
• Filling space A with liquid prevents seal damage from dry running.
• Maintain at least 25 mm clearance between the bottom of the pump and the tank floor.

ACRK 1-50Hz

» 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. [ % ]
ACRK 1-××/4	4	0.37	2.6/2.4/1.4/1.2	68.0
ACRK 1-××/7	7	0.37	2.6/2.4/1.4/1.2	68.0
ACRK 1-××/11	11	0.55	3.1/2.8/1.6/1.4	73.0
ACRK 1-××/13	13	0.75	4.0/3.6/2.1/1.9	80.7
ACRK 1-××/15	15	0.75	4.0/3.6/2.1/1.9	80.7
ACRK 1-××/17	17	1.1	5.3/4.8/2.8/2.6	82.7
ACRK 1-××/21	21	1.1	5.3/4.8/2.8/2.6	82.7
ACRK 1-××/23	23	1.1	5.3/4.8/2.8/2.6	82.7
ACRK 1-××/27	27	1.5	7.2/7.2/4.2/4.0	84.2
ACRK 1-××/30	30	1.5	7.2/7.2/4.2/4.0	84.2
ACRK 1-××/33	33	2.2	9.8/9.8/5.7/5.4	85.9
ACRK 1-360/36	36	2.2	9.8/9.8/5.7/5.4	85.9

ACRK 1-60Hz

» 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. [ % ]
ACRK 1-××/4	4	0.37	2.4/2.2/1.3/1.1	68
ACRK 1-××/6	6	0.55	3.0/2.7/1.6/1.4	73
ACRK 1-××/8	8	0.75	4.0/3.6/2.1/1.9	77
ACRK 1-××/10	10	1.1	5.3/4.8/2.8/2.6	84
ACRK 1-××/13	13	1.1	5.3/4.8/2.8/2.6	84
ACRK 1-××/15	15	1.5	6.6/6.0/3.5/3.2	85.5
ACRK 1-××/17	17	1.5	6.6/6.0/3.5/3.2	85.5
ACRK 1-××/21	21	2.2	9.6/8.7/5/4.5	86.5
ACRK 1-××/23	23	2.2	9.6/8.7/5/4.5	86.5
ACRK 1-××/25	25	2.2	9.6/8.7/5/4.5	86.5
ACRK 1-270/27	27	2.2	12.5/11/6.4/6.1	86.5

ACRK 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. [ % ]
ACRK 2-××/2	2	0.37	2.6/2.4/1.4/1.2	68
ACRK 2-××/3	3	0.37	2.6/2.4/1.4/1.2	68
ACRK 2-××/4	4	0.55	3.1/2.8/1.6/1.4	73
ACRK 2-××/5	5	0.55	3.1/2.8/1.6/1.4	73
ACRK 2-××/6	6	0.75	4.0/3.6/2.1/1.9	80.7
ACRK 2-××/7	7	0.75	4.0/3.6/2.1/1.9	80.7
ACRK 2-××/9	9	1.1	5.3/4.8/2.8/2.6	82.7
ACRK 2-××/11	11	1.1	5.3/4.8/2.8/2.6	82.7
ACRK 2-××/13	13	1.5	7.2/7.2/4.2/4.0	84.2
ACRK 2-××/15	15	1.5	7.2/7.2/4.2/4.0	84.2
ACRK 2-××/18	18	2.2	9.8/9.8/5.7/5.4	85.9
ACRK 2-××/22	22	2.2	9.8/9.8/5.7/5.4	85.9
ACRK 2-260/26	26	2.9	12.5/12.5/7.2/6.8	85.9

ACRK 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. [ % ]
ACRK 2-××/2	2	0.37	2.4/2.2/1.3/1.1	68
ACRK 2-××/3	3	0.55	3.0/2.7/1.6/1.4	73
ACRK 2-××/4	4	0.75	4.0/3.6/2.1/1.9	77
ACRK 2-××/5	5	1.1	5.3/4.8/2.8/2.6	84
ACRK 2-××/6	6	1.1	5.3/4.8/2.8/2.6	84
ACRK 2-××/7	7	1.5	6.6/6/3.5/3.2	85.5
ACRK 2-××/9	9	2.2	9.6/8.7/5/4.5	86.5
ACRK 2-××/11	11	2.2	9.6/8.7/5/4.5	86.5
ACRK 2-××/13	13	2.9	12.5/11/6.4/6.1	86.5
ACRK 2-××/15	15	2.9	12.5/11/6.4/6.1	86.5
ACRK 2-180/18	18	4.0	17.0/15.4/8.9/8.5	88.5

ACRK 3 – 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. [ % ]
ACRK 3-××/4	4	0.37	2.6/2.4/1.4/1.2	68
ACRK 3-××/7	7	0.55	3.1/2.8/1.6/1.4	73
ACRK 3-××/10	10	0.75	4.0/3.6/2.1/1.9	80.7
ACRK 3-××/12	12	1.1	5.3/4.8/2.8/2.6	82.7
ACRK 3-××/15	15	1.1	5.3/4.8/2.8/2.6	82.7
ACRK 3-××/17	17	1.5	7.2/7.2/4.2/4.0	84.2
ACRK 3-××/19	19	1.5	7.2/7.2/4.2/4.0	84.2
ACRK 3-××/25	25	2.2	9.8/9.8/5.7/5.4	85.9
ACRK 3-××/30	30	2.9	12.5/12.5/7.2/6.8	85.9
ACRK 3-360/36	36	2.9	12.5/12.5/7.2/6.8	85.9