Ultra-High-Pressure Jet Grouting Pump

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JN400

Grouting Pump

Max. pressure: 65 MPa
Max. flow: 475 L/min

Water Injection Pump

Max. pressure: 120 MPa
Max. flow: 1230 L/min

Drive mode: Electro-hydraulic (optional 4-pole/6-pole variable-frequency motor, and customizable diesel drive)
Weight: 15T
Dimensions: 5110×2700×2350 mm

JN400 ultra-high-pressure grouting pump is a new-generation product developed based on over 20 years of manufacturing and on-site application experience in high-pressure grouting pumps. It represents an industry-leading solution, delivering a maximum working pressure of 65 MPa to meet the demands of highly complex geological conditions and projects with stringent engineering standards. The pump is particularly suitable for conveying abrasive slurries, significantly extending seal service life while reducing labor intensity.

Juneng offers a standard integrated configuration including the grouting pump, motor, base, and electrical control cabinet. Highly integrated pump room systems are also available, featuring real-time display, data storage, printing, and remote transmission of working pressure, flow rate, and slurry density.

Features
Applicable Fluid Media
Application Scenarios
Specifications

Features

Low SPM, long-stroke design:
Low strokes per minute (SPM) operation ensures smoother slurry delivery and avoids excessive pulsation pressure fluctuations. The long piston stroke delivers higher discharge per stroke, allowing lower SPM under the same flow rate requirement and further reducing mechanical fatigue.
Innovative sealing system:
Comprehensive upgrades to the valve assembly and plunger sealing structures significantly extend seal service life and reduce maintenance frequency.

Applicable Fluid Media

Cement slurry: Foundation reinforcement, curtain grouting, and crack filling
Water: High-pressure water cutting
Chemical slurry: Anti-seepage treatment treatment, leakage plugging, and chemical reinforcement

Application Scenarios

Ultra-high-pressure jet grouting pump is suitable for

Foundation treatment
Curtain grouting
Retaining cofferdams

Mine leakage plugging
Shaft lining protection
Slope anchoring

Specifications

Juneng offers pump products with multiple parameter configurations to meet diverse requirements, including pressure, flow rate, plunger size, site conditions, drive mode, and budget. Suitable configurations can be selected from the parameter tables below, or you may contact us directly for free professional configuration recommendations.

JN400 Ultra-High-Pressure Grouting Pump

4-pole variable-frequency motor, large pulley 1400 mm/small pulley 335 mm

Pump Speeds (min^-1)		122			Plunger Stroke (mm)					150
Theoretical Flow (L/min)	Motor Power for 4-Pole (kW)									Plunger Dia. (mm)
	200	220	250	280		315	335	375	400
	Rated Pressure (MPa)
241	45	50	75	64		65	65	65	65	ø75
275	40	44	50	56		63	65	65	65	ø80
310	35	39	44	46		55	59	65	65	ø85
348	31	34	39	41		49	53	59	65	ø90
388	28	31	35	37		44	47	53	56	ø95
430	25	28	32	33		40	42	48	51	ø100
475	23	25	29	30		36	38	43	46	ø105

Note: Max. pressure is limited to 65 MPa.

JN400 Ultra-High-Pressure Grouting Pump

6-pole variable-frequency motor, large pulley 1400 mm/small pulley 335 mm

Pump Speeds (min^-1)		81			Plunger Stroke (mm)				150
Theoretical Flow (L/min)	Motor Power for 6-Pole (kW)								Plunger Dia. (mm)
	200	220	250	280	315	335	375	400
	Rated Pressure (MPa)
160	65	65	65	65	65	65	65	65	ø75
183	60	65	65	65	65	65	65	65	ø80
206	53	58	65	65	65	65	65	65	ø85
231	42	52	59	65	65	65	65	65	ø90
258	38	46	53	59	65	65	65	65	ø95
286	34	42	48	53	60	64	65	65	ø100
315	31	38	43	48	55	58	65	65	ø105

Note: Max. pressure is limited to 65 MPa.

JN400 High-Pressure Water Injection Pump

4-pole variable-frequency motor, large pulley 1250 mm/small pulley 335 mm

Pump Speeds (min^-1)		136			Plunger Stroke (mm)				150
Theoretical Flow		Motor Power for 4-Pole (kW)								Plunger Dia. (mm)
Theoretical Flow		200	220	250	280	315	335	375	400
L/min	m³/h	Rated Pressure (MPa)
268	16	39	42	48	54	61	68	77	82	ø75
306	18.4	34	37	42	47	53	60	67	72	ø80
345	20.7	30	33	38	42	47	53	60	63	ø85
388	23.2	27	30	33	37.5	42	47	53	56	ø90
432	26	24	26	30	34	38	42	47	51	ø95
480	28.8	22	24	27	30	34	38	43	46	ø100
530	32	20	22	24	27	31	34	39	42	ø105
581	35	18	20	22	25	25	31	35	38	ø110
635	38	16	18	20	23	26	29	32	34	ø115
691	41.5	15	16	19	21	24	26	30	32	ø120
750	45	14	15	17	19	22	24	27	29	ø125
811	48.7	13	14	16	18	20	22	25	27	ø130
875	52.5	12	13	15	16.6	19	21	23	25	ø135
941	56.5	11	12	14	15.5	17	19	22	23	ø140
1010	60.6	10	11.3	13	14.4	16	18	20	21	ø145
1080	65		10.6	12	13.5	15	17	19	20	ø150
1154	69.2		10	11	12.6	14	16	18	19	ø155
1230	73.8			10	12	13	15	16	18	ø160

Note: Max. pressure is limited to 65 MPa.

JN400 Ultra-High-Pressure Water Injection Pump

4-pole variable-frequency motor, large pulley 1250 mm/small pulley 400 mm

Pump Speeds (min^-1)		163		Plunger Stroke (mm)		150
Theoretical Flow		Motor Power for 4-Pole (kW)					Plunger Dia. (mm)
Theoretical Flow		250	280	315	355	400
L/min	m³/h	Rated Pressure (MPa)
171	10.4	75	83	94	106	120	ø55
207	12.4	63	70	79	89	100	ø60
243	14.6	53	60	67	76	85	ø65
282	16.9	46	51	58	65	74	ø70

Note: JN400 high-pressure grouting pumps with working pressure below 10 MPa are no longer listed.

What is a high-pressure mud pump used for foundation piling?

A high-pressure mud pump is used in bored cast-in-place piles and jet grouting pile construction. It delivers slurry at high pressure to maintain borehole wall stability.

What is a tunnel curtain grouting system?

A tunnel curtain grouting system is a specialized anti-seepage reinforcement technique. It forms an impermeable, water-blocking layer to protect tunnel lining structures.