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Quick Details

  • Place of Origin: Fujian, China (Mainland)
  • Brand Name: STARFLO
  • Model Number: DP-120
  • Theory: Electromagnetic Pump
  • Structure: Diaphragm Pump
  • Usage: Water
  • Power: Electric
  • Standard or Nonstandard: Standard
  • Fuel: 12V DC Power
  • Pressure: High pressure, max 120psi
  • Application: Agriculture/RV/marine/Yachts...
  • Pump Design: 3 Chamber Diaphragm
  • Max Flow: 5.5LPM
  • Voltage: 12v dc
  • Amps: 9.5A max
  • Duty Cycle: Intermittent
  • Valves: EPDM or Viton
  • Certification: CE, ISO9001:2008, RoHS
  • Port dimension: 3/8" Barb
  • Diaphragm: Santoprene
  • Body Material: Castlron

Packaging & Delivery

Packaging Details: 1pc/ box, 10pcs/carton
Delivery Detail: 7days after order confirmed





  STARFLO DP-120 12 volt dc fresh water diaphragm pump high pressure



  • Agriculture/Yacht / RV/Caravan pressurized water system
  • Sprayer fixture (Vehicle-mounted sprayer, electric sprayer)
  • Cleaning machine, Humidifier, Water purification, Medical apparatus
  • Food beverage filling & liquid transfer
  • Any other pressurization system


  • Small size,Light weight and Stable performance.
  • Special valve for liquid input and output.
  • Antivibration pad,easy installation.
  • Self-priming,Automatic Pressure Switch.
  • Automatic Pressure Protection.
  • Low Noise,with excellent resistant to chemical corrosion.


The pump is driven by an AC or DC motor

In front of the motor is a valve assembly containing two to five valve pump chambers.

Each valve chamber has a diaphragm behind it in the lower pump housing.

 As the motor shaft turns, an internal cam positioned behind the diaphragms causes the diaphragms to be pushed forward, then back in a continuous sequence creating a suction. As this suction builds, fluid is pulled through the inlet, through the various valve chamber check valves to the outlet

 The volume of flow is determined by several factors including: the number and size of the pump chambers, cam offset, operating pressure, fluid viscosity


  • High flow rate and low presurre requirements.
  • Automatic electric water pump,working rate 1.8-2.5meters,max flow rate more than 5 meters.
  • Water purification,filter machine,chemical metering and fluid supply.
  • Food,Beverage filling and transfer.
  • Controled by pressure switch.




Installation and Operation Manual

CAUTION: "Intermittent Duty" is defined as; operated and / or frequently started within a period of time that would cauce the motor to reach its maximum themal limits. Once the maximum themal limit is obtained, the motor must be allowed to return to ambient temperature before resuming operation.

CAUTION: DO NOT use to pump flammable liquids. Never operate the pump in an explosive environment. Arcing from the morto brushes,switch or excessive heat from an improperly cycled motor may cause an explosion.

CAUSTION: DO NOT assume fluid compatibility.If fluid is improperly matched to the pumps elastomers, a leak may occur. Pumps are used to transfer hazardous or hot (max.temperature 76 degree,Viton only) chemicals must be in vented area to guard againest the possibility of inquiry due to harmful or explosive liquid / vapors.

CAUTION: DO NOT operate the pump at pressure which cause the motor to exceed the amperes rating indicated on the name plate. Various pump models are equipped with themal breakers to interrupt operation due to excessive heat.Once the temperature of the motor within proper limits it will automatically reset, and the pump will start operation without warming.

CAUTION: To prevent electrical shock, disconnect power before initiating any work. In the case of pump failure, the motor housing and / or the pumped fluid may carry high voltage to components normally considered safe.


The pressure switch reacts to outlet pressure, and interrupts power at the preset shut-off pressure indicated on the pump lable.When outlet pressure drops below a predetermined limit(typically 15-20psi, 1-1.4bar)  less than shut- off pressure. The switch will close and the pump operates until the shut-off( high) pressure is achieved. The shut-off pressure is set to factory calibrated standards.

CAUTION: Improper adjustment of the pressure switch setting, may cause severe overload or premature failure. Failures due to improper adjustment of the pressure switch setting will not be covered under the limited warranty.

If the plumbing is restrictive or the flow rate is very low, the pump may re-pressurize the outlet faster than the fluid is being released, causing rapid cycling(ON/OFF) within 2 sec.) If the pump is subjected to rapid cycling during normal operation, or for infrequent periods, damage may occur. Applucations which exhibit rapid cycling should have restrictions in the outled minimized. If not feasible consider a accumulator or a "bypass" model pump






















Q: Is your company a trading company or factory ?


Q: What's your main products of your company?

A: We specialized in all kinds of water pump(drinking water pump,micro gear pump,high performance diaphragm pump,Marine pump,RV pump, bilge pump )for over 8 years with excellent quality and competitive

Q:How can I choose the most suitable pump?

A: Please tell me your detailed flow rate, voltage, application and so on, then I will match the most appropriate pump for you, or you can choose the exact model in the product manual.If you don’t know the details for the pump, tell us the usage, must suitable model will be recommended.

Q:What's your product MOQ of it?

 A:Our company is pleasure accept all items 1pcs order for testing.If bulk order, pls send inquiry to get more  discount.

Q: What's your payment way?

A: Usually we accept T/T ,Western Union or PayPal. 

Q: What's your delivery time?

A. 1.The stock samples can be sent to you within 2-3days by international express after received 

   2.The batch order can be shipped to you in about 10-15days after order confirmation (by air or by sea)   

Q: How long is your pump lifetime?

A: Pump lifetime mainly depends on motor lifetime,we have DC brush, brushless, coreless brushless motor

For your choice, the pump warranty is 12 months.we can supply 1% spare parts for after service.


Sample order is very welcome to have a test, if have any inquiry,pls kindly let me know freely. 



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