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SOVOFLO website SURFLO official website    FLOWMONSTER SERIES PLUNGER PUMPS    FLOWMONSTER Brass Triplex Plunger Pump BM Series

FLOWMONSTER Brass Triplex Plunger Pump BM Series

Forged brass cylinder
Anodized crankcase
Ceramic plungers
German parker water seal
Fixed rated chemical injector
Built-in self suction unloader
Pressure adjustable
In-line water inlet filter
Quick connect outlet

FLOWMONSTER BM Series Brass Triplex Plunger Pump Electric Plunger Pump Motor Direct Drive/Gasoline Plunger Pump/Diesel Plunger Pump Engine Drive High Pressure Plunger Pump for Pressure Washer/ Farm Misting System/Industrial Humidifier

High pressure Reciprocating Plunger Pump Model BM is generally very efficient and suitable for high heads at low flows.

Triplex Plunger Pumps are self priming as it can draw liquid from a level below the suction flange even if the suction pipe is not evacuated. Plunger pumps are not tolerant to solid particles. Here, pistons are reciprocated using crankshaft, not cam type mechanism. Pressure Jet industrial High Pressure Triplex Plunger Pumps are positive displacement Triplex plunger pumps. In a reciprocating pump, a volume of liquid is drawn into the cylinder through the suction valve on the intake stroke and is discharged under positive pressure through the outlet valves on the discharge stroke. Flow rate of pump is directly proportional to its SPM (Strokes per minute). Pressure Jet Triplex plunger pumps have three synchronized plungers that discharge liquids at high pressure with minimum pulsation.


Standard features

Forged brass cylinder
Anodized crankcase
Ceramic plungers
German parker water seal
Fixed rated chemical injector
Built-in self suction unloader
Pressure adjustable
In-line water inlet filter
Quick connect outlet

Technical Parameters:

Brass Manifold, Solid Shaft, 24mm High Pressure Mist Pump
Model Flow Pressure Power Speed Plunger Diameter Stroke
  L/min gpm bar psi hp kw rpm mm mm
BM0210 2 0.53 100 1450 0.75 0.55 1450 15 3
BM0310 3 0.79 100 1450 1 0.75 1450 15 5
BM0410 4.5 1.19 100 1450 1.5 1.1 1450 15 6
BM0510 5.5 1.45 100 1450 1.5 1.1 1450 15 7
BM0810 7.5 1.98 100 1450 2 1.5 1450 15 10
BM0818 7.5 1.98 180 2610 4 3 1450 15 10
BM1210 11 2.91 100 1450 3 2.2 1450 18 10
BM1218 11 2.91 180 2610 5.5 4 1450 18 10
BMV1218 12 3.17 180 2610 5.5 4 1450 18 10
BM1315 13 3.43 150 2175 5.5 4 1450 18 10
BM1318 13 3.43 180 2610 5.5 4 1450 18 10
BM1325 13 3.43 250 3625 10 7.5 1450 18 10
BM1508 15 3.96 80 1160 3 2.2 1450 18 14
BM1510 15 3.96 100 1450 4 3 1450 18 14
BM1515 15 3.96 150 2175 5.5 4 1450 18 14
BM1518 15 3.96 180 2610 7.5 5.5 1450 18 14
BM1520 15 3.96 200 2900 7.5 5.5 1450 18 14
BM1525 15 3.96 250 3625 10 7.5 1450 18 14
BMV1825 18 4.76 250 3625 12 9 1450 19 14
BM1910 19 5.02 100 1450 5.5 4 1450 20 14


Dimension Drawings

Instructions for use

1. The pump should be installed on a flat base less than 15 degrees to ensure the best lubrication conditions

2. Confirm the inlet size of the high-pressure pump piping. The inlet pipe diameter should be 1.5-2 times the inlet size of the pump. The inlet and outlet of the pump must be equipped with hoses to avoid pressure and fluctuations generated by the system. It is best to install accumulators to avoid bending of pipes.

3. The water supply pressure should be 1.5-8kg/cm2. The water supply temperature is below 70 Celsius degrees. The water supply system of the high-pressure pump must avoid the entry of air to ensure that the pump parts are not damaged.

Direction of rotation: The direction of rotation of the high-pressure pump is the direction in which the top of the pulley must face the pump head.

4. Before starting the motor-pump system, the following must be done

1). Check whether the crankcase lubricating oil is normal. If the oil level indicator of the gear box has only one engraved line, the oil level cannot be lower than the engraved line, but not higher than the engraved line 5mm. If the oil level indicator of the gear box has two Each line, the oil level is between the two lines.

2) Confirm that the valves of all pipes have been opened, and the medium can flow into the inlet of the pump and exhaust the air inside the system.

3) The operation of the high-pressure pump is not allowed to exceed the specified pressure, flow and speed.

4) Before spraying, the high-pressure nozzle should confirm whether the spray direction is safe. If there are unsafe factors, they should be eliminated in time to ensure safe production.

5. In order to remove the water in the pump to facilitate the placement in the freezing point environment, the pump can run for no more than 10 seconds under the condition of no water inlet.

6. For the system where the overflow valve is installed, the overflow pipe must be a hose. The overflow pipe should not be connected to the water inlet of the pump, but should be connected to the water tank or sewer.

7. When used for water storage tank, the suction line should use a hose of less than 3 meters, and the water level should be set higher than the height of the pump. If the water supply pressure does not reach the required pressure, it is recommended to use a booster pump.

8. Clean water should be used for the water supply, and a filter should be used on the supply line to prevent the inhalation of foreign objects.

9. Before operating the high-pressure pump, loosen the pressure regulating valve, and then gradually increase the pressure as needed after operation.

10. Lubricating oil should use SAE20W-50 or the same level of lubricating oil.

11. Lubricating oil should be replaced after 50 hours of initial use, and every 500 hours thereafter.

12. The water inlet filter should be regularly checked and cleaned.

13. All moving parts of the plunger pump must not be in a dry state.

14. High-pressure pumps are not allowed to use acidic, alkaline or corrosive liquids.




Cause Solution


The pump is running but does not absorb water


problem with the water supply

Open the water supply valve


Confirm whether the water supply line is in a folded state


Do not allow air to enter the water supply line

The pump is running but fails to meet the pressure requirements

Water supply line is blocked


Air in the pump


One-way valve fails or foreign matter enters


Pressure regulating valve malfunctions or foreign matter enters


Nozzle failure


Seal failure

Check the suction line


Check the suction line


Wash or replace


Wash or replace





1. Sudden vibration when the pump is running


2. Unstable pressure / pulsation, no pressure operation

Inhaled air


One-way valve fails or foreign matter enters


Damaged O-ring at the lower end of the check valve


Check valve damaged overall


Component wear


The inlet pipe is blocked and the water intake is blocked





Accumulator without pressure

Check the suction line


Clean safety valve and replace


Replace O-ring


Replace check valve


Replace components


Check whether the system is clogged and air leaks, the pump inlet pipe size is appropriate


Check whether the inlet pipe is blocked and the size is appropriate


Repressurize or replace the accumulator

Pressure drop, sudden pressure drop in the pipeline

Seal wear


Valve spring broken


Worn or damaged nozzle


Drain valve blocked


Worn or damaged hose


Due to throttling, the pump is idling



Replace the seal assembly


Replace the spring


Replace the nozzle


Cleaning valve assembly


Repair / Replace


Check the inlet pipe at the entrance


Check if it works

Running noise

Bearing wear



Replace the bearing and refuel


Check whether the inlet pipe is blocked and the size is appropriate

Excessive unloading of overflow saliva

Plunger wear


Component / seal wear


Too much vacuum


Plunger break


Inlet pressure is too high

Replace plunger


Adjust or replace the seal assembly


Reduce the vacuum on the suction side


Replace plunger


Reduce inlet pressure

The crankcase temperature is too high

Wrong choice of lubricant


Crankcase oil volume is not suitable

Choose the right lubricant


Adjust the oil level to the appropriate amount

Crankcase water intake

Humidity is too high


Seal wear

Reduce oil seal interval


Replace the seal


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