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4SD Deep Well Pump


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The SD series stainless steel deep well submersible pump is an integrated groundwater extraction device, with its most notable feature being the combination of the motor and pump into a single unit. Constructed from stainless steel, this pump boasts excellent corrosion resistance and hygienic properties. The equipment operates by submerging the motor and pump directly into the water, making it suitable for water lifting projects in deep wells, rivers, reservoirs, and similar environments. It is primarily used for agricultural irrigation, drinking water supply for people and livestock in plateau and mountainous regions, as well as urban and industrial water supply and drainage. Its compact structural design ensures easy installation and maintenance, while also delivering high efficiency, energy savings, and safe, reliable operation.

Model:
4SD
Brand:
SRM

Product Description

FAQ

Product Advantage

1. High Efficiency & Energy Saving: Optimized hydraulic design reduces energy consumption, achieving higher operational efficiency than comparable products.

2. Corrosion Resistance: Stainless steel construction ensures long-term resistance to water corrosion, extending equipment lifespan .

3. Lightweight Design: Compact and lightweight structure facilitates transportation and underground installation.

Technical Parameters

Operating conditions

Maximum fluid temperature up to +35℃.

Maximum sand content: 0.25%.

Maximum immersion: 80m.

Minimum well diameter:3".

Motor and Pump

Rewindable motor or Full

obturated screen motor

Three-phase: 380V-415V/50Hz

Single-phase: 220V-240V/50Hz

Pumps are designed by casing stressed

Curve tolerance according to ISO 2548

Options on request

Equip digital auto-control box

Special mechanical seal

Other voltages or frequency 60 Hz

Components	Material
Pump external casing	AISI 304 SS
Delivery casing	Cast-Cu ASTM280
Suction lantern	Cast-Cu ASTM280
Diffuser	Plastic.PC
Impeller	Plastic.POM
Shaft	①AISI 316 SS ②AISI 304 SS
Shaft coupling	①AISI 316 SS ②AISI 304 SS
Wear ring	AISI 304 SS
Motor external casing	AISI 304 SS
Top cover	Cast-Cu ASTM280
Bottom support	AISI 304 SS
Mechanical seal	Special seal for deep well(carbon-SIC/TC)
Shaft	AISI 304 SS-C1045
Bearing	NSK
Seal lubricant oil	Oil for food machinery and pharmaceutic use.

Model Optional

MODEL		DN	DIMENSIONS(mm)			WEIGHT(kg)
1~220-240V	3~380V/415V		L1	L(S)	L(T)	G(S)	G(T)
4SDM2/4	4SD2/4	11/4"/11/2"	323	615	610	9	8
4SDM2/6	4SD2/6	11/4"/11/2"	373	670	665	10	9
4SDM2/8	4SD2/8	11/4"/11/2"	422	734	719	11	10
4SDM2/11	4SD2/11	11/4"/11/2"	497	824	809	12	11
4SDM2/14	4SD2/14	11/4"/11/2"	571	918	898	14	13
4SDM2/20	4SD2/20	11/4"/11/2"	752	1139	1099	17	15
4SDM2/26	4SD2/26	11/4"/11/2"	900	1347	1287	20	18
4SDM2/32	4SD2/32	11/4"/11/2"	1067	1603	1514	26	22
4SDM2/36	4SD2/36	11/4"/11/2"	1166	1702	1613	27	23
一	4SD2/44	11/4"/11/2"	1396	一	1873	一	27
一	4SD2/52	11/4"/11/2"	1595	一	2146	一	31
一	4SD2/60	11/4"/11/2"	1793	一	2344	一	33

In the list: L(S) is single phase motor, L(T) is three phase motor
In the list: G(S) is single phase motor, G(T) is three phase motor

Performance Charter

Performance Data 50Hz
MODEL		P₂		DELIVERY n≈2850 r/min
220V/240V	3~ 380V/415V	KW	HP	m³/h	0	0.3	0.6	0.9	1.2	1.5	1.8	2.1	2.4	2.7	3.0	3.3
				Q I/min	0	5	10	15	20	25	30	35	40	45	50	55
4SDM2/4	4SD2/4	0.18	0.25	H(m)	28	28	28	27	26	25	24	22	20	17	13	10
4SDM2/6	4SD2/6	0.25	0.33		42	42	41	41	40	38	36	33	29	25	20	15
4SDM2/8	4SD2/8	0.37	0.5		56	56	55	54	53	51	48	474	39	33	27	21
4SDM2/11	4SD2/11	0.55	0.75		77	76	76	75	73	70	66	61	54	46	37	28
4SDM2/14	4SD2/14	0.75	1		98	97	97	95	92	89	84	77	69	58	47	36
4SDM2/20	4SD2/20	1.1	1.5		140	139	138	136	132	127	120	111	98	83	67	52
4SDM2/26	4SD2/26	1.5	2		182	181	179	176	172	165	156	144	127	108	88	67
4SDM2/32	4SD2/32	2.2	3		224	222	221	217	211	203	1941	177	157	133	108	83
4SDM2/36	4SD2/36	2.2	3		252	250	248	244	238	228	215	199	176	149	121	93
一	4SD2/44	3	4		308	306	304	298	290	279	263	243	216	183	148	114
一	4SD2/52	4	5.5		364	361	359	353	343	329	311	288	255	216	175	134
一	4SD2/60	4	5.5		420	417	414	407	396	380	359	332	294	249	202	155

Product Uses

Agricultural Irrigation: Supports high-capacity groundwater extraction to meet farmland water demands.
Drinking Water Supply: Suitable for water supply projects in remote areas such as highland and mountainous regions.
Industrial Drainage: Used for water supply and drainage in mines, railways, and construction sites.

Operating Instructions

1. The deep well pump should only be used with clean water sources containing less than 0.01% sand.

2. The pump must not run dry (without water). The first and second-stage impellers must be submerged at least 1 meter below the water level. Monitor the water level in the well during operation.

3. If excessive vibration occurs around the base during operation, inspect the pump bearings or motor packing for wear. Replace worn parts if leakage is detected.

4. If the pump has been used to transport sandy or muddy water, flush it thoroughly with clean water before shutdown.

5. Before stopping the pump, first close the discharge valve, cut off the power supply, and lock the switch box. In winter, drain all residual water from the pump to prevent freezing damage.

FAQs

How to Choose a Deep Well Pump?

Head Matching: Ensure the rated head does not significantly exceed the actual operating head—ideally, no more than 25% higher than the actual requirement. The actual head is the vertical distance from the well's water level to the discharge pool, including:
Net head (static lift)
Friction head loss (typically 6–9% of net head, or 1–2 meters).
The impeller should be submerged 1–1.5 meters below the water level, and the total length of the submerged pump section must not exceed the maximum well depth specified in the manual.
Flow Rate Selection: Match the pump's flow rate to the well's yield capacity.
Sand Content: Avoid water with excessive sand (>0.1%), as it accelerates wear and shortens the pump's lifespan.
Size Compatibility: The pump's maximum outer diameter should be 25–50 mm smaller than the well diameter to prevent vibration-induced damage to the well casing.
(Note: Technical terms like "head," "impeller," and "friction loss" are precisely translated. Key parameters (e.g., 25%, 0.1%) are retained for accuracy. Safety margins (e.g., 25–50 mm clearance) are emphasized for practical application.)
Can I Use My Own Logo?

Custom Branding Option–We support OEM/ODM services and can produce pumps with your logo, provided you:
Own the trademark OR
Have authorization from the trademark owner.