Automatic Fuel Oil Transfer Pump Set

The Automatic Fuel Oil Transfer Pump Set is a state of the art system duplex pump sequencing and monitoring system.  This system includes automatic lag pump back-up features that improve fuel system availability and safety.  A pump set mounted LCD display is used to monitor day tank and pump set status and alarms.

Skid or Enclosure Designs
Color Touch Screen
Pump Rates from 90 to 1000+ GPH Available
Design Pressures of 50, 100, and Up
Simplex or Duplex Strainer
Standard Built and Custom Configurations
Building Automation System (BAS) Interface

  • Overview and Features
  • Application
  • Specifications and Ordering
  • Documents
Overview and Features

The Automatic Fuel Oil Transfer Pump Set (ATPSF) is a state-of-the-art duplex pump sequencing and monitoring system factory packaged, pre-engineered, pre-wired and pre-plumbed system that includes pumps, industrial motors, and accessories. This system includes automatic lag pump back-up features that improve fuel system availability and safety. The ATPSF pump set has been upgraded to include the Preferred Flexible System Controller (FSC) to reduce field wiring and commissioning time.

Standard Equipment Includes:

  • Microprocessor-based control with color touchscreen display and alarm/event and operator action log in a NEMA 4 enclosure.
  • Included FSC controller communicates by redundant digital link to other FSC controllers on day tanks, filtration sets, and fill boxes to reduce field wiring.
  • Control circuit transformer (if required)
  • Alarm bell with alarm silence/reset pushbutton
  • Two “Hand-Off-Auto” switches
  • “Pump On” indicators 
  • Two magnetic motor starters with overload protection 
  • Two motor circuit breakers
  • Two pump and motor assemblies
  • Two Simplex Inlet Strainers
  • Two relief valves, two check valves and four ball valves
  • Pump Discharge Pressure Gauges 
  • Pump set flow proving switch (shipped loose and sold separately)

Duplex Strainer (Option “-D”): A Preferred Model 72 duplex fuel oil strainer is provided on the suction side of the pump set instead of the two simplex strainers.  Strainer baskets are 40 mesh stainless steel.

Duplex Strainer Differential Pressure Switch (Option “-DP”): A differential pressure switch/ indicator with isolation cocks is provided to energize an audible and visual alarm should an excessively dirty strainer condition be detected (Option “-DP”  can only be used with option “-D”).

Automatic Pump Prime And Suction Line Integrity Check: Fuel transfer system suction piping, pump prime and pump operation are automatically verified each week (adjustable). The lead pump is automatically energized. Once the lead pump has been proven, the lag pump is energized and run through the same test. These tests are recorded in the controller memory with a time-date stamp for later verification. If either lead or lag pump fails any of these tests, the control system generates an audible and visual alarm and logs the “failed pump” condition.  To permit pump set testing, fuel oil piping system design must allow the pump set discharge to return to the main storage tank.  The above diagrams show suitable Boiler Loop and Day Tank system arrangements. Additionally, system designs may include return flow pumps or solenoid valves. Consult factory for additional information.

Main Storage Tank Monitoring (Optional): Fuel Sentry Model TG-EL-D4A tank gauges may be integrated into the Model ATPSF Transfer Pump Set.

Modbus Communication Interface: Off-site monitoring and control is available via RS-485 Modbus, Ethernet TCP/IP, or BacNet IP digital communication.

Alarms / Event Summary: Up to 200 alarms, system events and operator actions are listed in “first in-first out” order with time & date stamp. Alarms include “pump thermal overload,” “pump loss of flow,” and “pump set failure” with “day tank leak,” “day tank high level” and “day tank low level” alarms added for day tank systems. The following events are recorded with time & date stamp: “pump started,” “pump control switch in ‘off’ position,” “pump set prime test OK” and “pump selected as lead.”

Pump Set Leak Detector Switch (Option “-L”): A float-operated “containment basin leak” detection switch is provided to shut off the pumps and energize an audible and visual alarm should a pump set leak be detected.


The ATPSF pump set is typically at the heart of a complete fuel oil storage and handling system. The FSC controller that makes up the brain of the ATPSF pump set has enough inputs and outputs to control a typical boiler loop system, or a typical generator system up to three day tanks. In this single-node configuration, all the day tank and main tank instruments hard-wire back to the FSC controller in the pump set enclosure.



Larger fuel oil handling systems, or systems where the tanks and generators are spread out geographically, will benefit from a multi-node FSC-based control system. In this configuration, each of the major components of a fuel oil handling system (pump set, day tank, filtration system, etc.) will include it’s own FSC controller. Locally mounted-devices will hard-wire to the nearest FSC controller, and each of the FSC controllers will interconnect via a redundant digital communication system carried over a pair of three conductor shielded cables. This configuration can accommodate up to eighteen generator tanks, and greatly reduce the amount of field wiring and trouble-shooting.

Specifications and Ordering

Motor Power: 120, 208, or 230 Vac 1 phase or 208, 230, or 460 Vac 3 phase

Control Circuit Power: 120 Vac 1 phase step down transformer included when selected motor voltage is other than 120 Vac

Fluid: No. 2 or No. 4 Fuel Oil is standard.  Consult factory for other fuel types

Pump: Bi-rotational, positive displacement type with cast iron housings and self-adjusting mechanical seals

Motors: Base mounted, Totally Enclosed Fan Cooled (TEFC) construction

Strainer: Simplex, ½", 1", 1½", or 2" (according to inlet line size) complete with 40 mesh basket (Duplex strainer available)



ATPSF Specification

ATPSF Cutsheet

ATPSF Cutsheet Revit Files