DeltaMatic Rate of Drop Linebreak Detection System

Product catalog summary

General Description
The Bettis DeltaMatic™ linebreak detection system is engineered to automatically monitor gas pipelines and send an instrument pressure signal if a predetermined rate of pressure drop is exceeded. This system is crucial for detecting pipeline breaks and signaling valve operators, ensuring safety and environmental protection in various locations such as populated areas and river crossings.

Features and Benefits

Operates on pipeline pressure without electrical power.
Accommodates normal pipeline pressure fluctuations without triggering shutdowns.
Compact design, fully assembled unit.
Can be retrofitted into existing systems with minimal field setup.
Installable remotely or directly on valve operators.
Utilizes a labyrinth type flow restriction for larger passage sizes.
Standard rate of drop ranges from 5 to 120 psi/minute, adjustable in the field.
Operates in extreme cold environments down to -50°F (-46°C).

Operation
The system functions with the line valve open, closing it when power gas is present. Line pressure is applied to a differential pressure pilot and rate tank through a check valve. The differential pressure pilot compares line pressure with reference pressure in the rate tank, creating a differential pressure across a restrictor. This pressure is directly related to the rate of drop of line pressure, and the pilot is calibrated to vent a signal when the rate of drop exceeds a set threshold.

Components

Operator
Line Valve
Gas/Hydraulic Tank
3-Way Valves (Manual and Manual/Pilot)
Selector Valve
Speed Control Valve
Check Valve
Handpump
Filter
Pressure Regulator
Relief Valve
End of Stroke Valve

Calibration and Adjustment
The system's rate of drop setting can be adjusted by changing the DeltaMatic pilot's differential pressure setting. This may involve selecting a different spring, which can be changed and recalibrated in the field. The system can also be converted to a different nominal range by fitting a different restrictor.

Available Options

Backup low pressure detection
Adjustable time delay control system
Sour gas pipeline application
Weatherproof enclosure
Prefilter on pipeline connection
Alarm to control room pressure switch
Higher rate of drop ranges
Manual reset, lockout, or override

Operating Environment and Specifications

Line pressure range and temperature limits
Humidity, rain, and snowfall considerations
Service media and mounting options
Control specifications including rate of pressure drop range and setpoint
Pneumatic supply pressure and output signal options

Catalog excerpts

DeltaMatic Rate of Drop Linebreak Detection System-1

Pipeline Pressure OperatedSelective Shutdown Capability Compact System Adaptable to Existing SystemField Adjustable Withstands Harsh Environment DeltaMatic > TM Rate of DropLinebreak Detection System >

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DeltaMatic Rate of Drop Linebreak Detection System-2

SEPERATE TAKE OFF (OR ISOLATE #101 TO RE-OPEN)101213 4353CLOSE152425J1-RT2BASIC SUBPLATETESTCONNECTION120 SUPPLY 1059391103102 > 7 7 102101119 92 1 6 6 108TIMEDELAY SYSTEM (OPTIONAL) 8 8 OPEN PIPELINE 37 OPERATION SHOWN WITH LINE VALVE OPEN ֖ LINE VALVE WOULD CLOSE WITH POWER GAS PRESENT LINE PRESSURE IS APPLIED TO DIFFERNTIAL PRESSURE PILOT (120) AND TO RATE TANK (108) THRU ֖CHECK VALVE (103). THE DIFFERENTIAL PRESSURE PILOT (120) COMPARES LINE PRESSURE WITH REFERENCE PRESSURE IN ֖RATE TANK (108). IF LINE PRESSURE DECREASES, A DIFFERENTIAL PRESSURE IS CREATED BETWEENRATE TANK AND LINE ACROSS...

Open the catalog to page 2