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4SK100 Deep Well Pump


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The 4SK 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:
4SK100
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+40℃.

Maximum sand content:0.15%.

Maximum immersion:50m.

Minimum welldiameter:4".

Motor and Pump

Rewindable motor

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

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

Equip with start control box or digital auto-control box

Curve tolerance according to ISO 2548

Options on request

Special mechanical seal

Other voltages or frequency60 Hz

Components	Material
Delivery casing	Cast-Cu ASTM280
Suction lantern	①Cast-Cu ASTM280②AISI 202 SS
Diffuser	①Cast-Cu ASTM280②AISI 202 SS
Impeller	Cast-Cu ASTM280
Strainer	AISI 304 SS
Motor external casing	AISI 304 SS
Top chock	①Cast-Cu ASTM280②Cast-iron G20 UNI5007
Bottom support	AISI 304 SS
Mechanical seal	Special seal for deep well(carbon-SIC/TC)
Shaft	AISI 316 SS-C1045
Bearing	NSK
Seal lubricant oil	Oil for food machinery and pharmaceutic use

Model Optional

Performance Charter

Performance Data 50Hz
MODEL		P₂		DELIVERY n≈2850 r/min
1~ 220V/240V	3~ 380V/415V	KW	HP	m³h	0	0.3	0.6	0.9	1.2	1.5	1.8	2.1	2.4	2.7
1~ 220V/240V	3~ 380V/415V	KW	HP	I/min	0	5	10	15	20	25	30	35	40	45
4SKM100	4SK100	0.75	1	H(m)	60	56	50	43	37	31	25	18	12	6
4SKM150	4SK150	1.1	1.5		98	88	78	69	59	49	39	30	20	10
4SKM200	4SK200	1.5	2		110	104	92	81	69	58	46	35	24	14

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.)
How to Purchase SRM Pumps?

Purchasing SRM pumps is simple:
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