The Axelson Differential Pressure Sensing Unit is designed to attach to a standard ESP Body Subassembly to form a differential pressure sensor. 

The sensor may be used to detect a predetermined difference between two pressures.

The Differential Pressure Sensing Unit is a three-way block and bleed control valve which is controlled by a differential pressure sending piston assembly.  It may be connected as a high or a low sensor.  The set point of the sensor is adjustable by rotating the spring cap, thus varying the spring force which opposes the force of the differential pressure acting across the diaphragm.

When connected as a HIGH sensor, control pressure is allowed to flow through the control to the outlet as long as the differential pressure sensed remains below the set point of the sensor. When the set point is exceeded, the inlet port is blocked and the outlet port is open to exhaust.

When connected as a LOW sensor, control pressure is allowed to flow through the control to the outlet as long as the differential pressure sensed remains above the set point of the sensor. When pressure declines below the set point, the inlet port is blocked and the outlet port is open to exhaust.

NOTE:

When connecting the inlet to the high port, DO NOT plug the low port.
When connecting the inlet to the low port, DO NOT plug the high port.

 

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TECHNICAL DATA:

Connections:
Sensing Port  –  1/4 NPTF

Pressure Ratings:
Maximum Working Pressure  –  3000 psi
Maximum Differential  –  3000 psi
Adjustable Differential Set Point  –  0.5  – 40 psi

Size:
Diameter  – 6″
Height, less sensor body  –  3-1/4″
Hight with sensor body –  11-3/4″
Weight  –  14-1/2 lbs.

Conformance
Conform to NACE Standard MR-01-75

HOW TO ORDER:

Base Number –  47509-XXXX

Seal Material – 1st Digit
Buna-H  –      1
Viton  –         2
Neoprene –    3
Epom –         4

Spring – 2nd Digit
Light Steel (orange)  0-20 PSI –       1
Heavy Steel (blue)  0-60 PSI  –        2
Light Inconel (yellow) 0-20 PSI –      3
Heavy Inconel (green)  0-60 PSI –    4

Sensing Unit – 3rd Digit
4″ 3000 psi, Viton, Diapragm 316 SS Housing –     1

Body – 4th Digit
Standard –  –  No Number
Standard Indicating –   1
Hi Flow (Indicating) –  2