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

FLOWMONSTER Triplex Plunger Pump PT Series

The preferred pump frame in the pressure cleaning industry. Nickel-plated forged brass manifold with an exclusive lifetime warranty. Large-capacity, die-cast, anodized aluminum oil-bath crankcase. Over-sized connecting rods for maximum life. Heavy-duty tapered roller bearing. Solid ceramic plungers with continuously lubricated packings. Unitized stainless steel inlet and discharge valves. Also available in left-handed shaft.

FLOWMONSTER Triplex Plunger Pump PT Series High Flow Plunger Pump 70-179LPM Ceramic Plunger Pump High Pressure Plunger Pump 100-200Bar 20-28.5KW Electric Motor Drive


-Innovative & Unique

We are the trend-setter in China for this high pressure plunger pump, we create & design and then introduce it to the consumers, in China, only a few companies have the ability to manufacture this pressure pump, with the unique & special feature, we proudly introduce them to you too.

-Cost-Effective & Profitable

Compared to other overseas companies, we have great advantage in pricing, and presently, very few Chinese companies involve in this pump, we are the really right supplier or partner for you. It will be a profitable cooperation to work with us.

-Stability, Dependability

We grasp all the technology of this high pressure plunger pump, and we utilize the highest quality materials & components, plus the gear reduction box, which makes this pressure pump durable & reliable.

-Superior Service & Support

The technical support & assistance is available anytime, the quick-response will be effected. We will also find the most economical way to the spare parts requests.



The preferred pump frame in the pressure cleaning industry

Nickel-plated forged brass manifold with an exclusive lifetime warranty

Large-capacity, die-cast, anodized aluminum oil-bath crankcase

Over-sized connecting rods for maximum life

Heavy-duty tapered roller bearing.

Solid ceramic plungers with continuously lubricated packings

Unitized stainless steel inlet and discharge valves

Also available in left-handed shaft


Industrial applications

In-plant stationary systems

Trailer mounted cleaning systems

Drain cleaners

Multiple gun washing stations

High flow pressure washers

Dust Suppression Truck


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 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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