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Septuplex

Septuplex (Pump)

A reciprocating pump which utilizes seven drive rods to transfer linear motion to the pump's pistons or plungers.

 

Septuplex pumps are not as common as other pumps using fewer drive rods. In many applications, a single quintuplex, or two triplex in parallel are used to meet flow requirements. Septuplex pumps are used in applications where flow variation and pressure pulsations are needed to be kept to a minimum. 

Septuplex Pump Flow Characteristics

Septuplex pumps have roughly half of the flow variation of quintuplex pumps. The flow in a septuplex pump fluctuates between 97% and 101% (4% variation) from the average flow rate. There is and additional variation after the pump reaches its maximum flow rate at 101%. The flow will drop to 99% before returning back to its maximum, and then to its minimum. The maximum to minimum flow rate variation takes place seven times per crankshaft revolution.

Single Action Septuplex Pump Flow Characteristics

 

Septuplex Pump Example Applications

Septuplex pumps are routinely used for low to medium flow applications such as:

  • Amine Circulation
  • Reverse Osmosis
  • Crude Oil Transfer
  • Hydraulic Fracturing
  • Descaling
  • Salt Water Injection
  • Hydrocarbon Condensate
  • Well Service
  • Water Jetting
  • CO2 Injection
  • Water Flooding

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