Manntek Powered Emergency Release Coupling PERC, LNG Solutions

Powered Emergency Release Coupling (PERC)

Highest safety level, three ways of release

  1. Release by ESD-signal.
  2. Release by manual override, independent of electrical signal.
  3. Reverting from nitrogen activated to passive breaking pin. Breaking pins designed to be the weakest point of hose or manifold.

Ability to actively and remotely release the coupling without strain on the transfer system.

An active safety device but in the event of a ‘Black out’ has the back up of becoming a passive Break Away Coupling.

Designed to protect the manifolds in any situation.

PERC control unit HPN2 – SIL2

Area of use

  • The dedicated release and monitoring system for the MannTek PERC coupling.
  • It includes the complete control,  monitoring and release system, which uses high pressure Nitrogen in the release mechanism. The system also features a pilot pressure regulator to constantly monitor the system and keep it free from moisture and ice.

PLC – monitoring and control unit

  • The software is programmed under the supervision of a third party.
  • Programmed uniquely for each application.
  • Monitors the system during the whole bunkering/transfer operation.
  • Eliminates the human factor and ensures all steps in the periodical test are carried out.

PLC control with SIL2 compliance

  • MannTek SIL2 PLC LNG transfer systems have been assessed by DNV-GL and declared compliant to SIL2. This extra safety feature has been developed in accordance with IEC 61508 and IEC 61511 with input data from the PDS Data Handbook 2010. 
  • Identifying mean time between failure (MTBF), probability of failure on demand (PDF), all safety instrumented functions (SIF) and achieving a minimum probability of failure on demand is compliant with safety integrity level SIL2. 
  • The SIL2 compliance is on the whole LNG Transfer System and includes: PERC, DCC, HPN2 PLC control system, ESD1&2 functionality, the logic solver i.e. Siemens PLC controller and software, sensor elements and final elements.
Manntek Powered Emergency Release Coupling PERC, LNG Solutions


Technical data

Treaded connectionsFlanged connectionsFlow rateMaterialsSeals
2½” (DN65) Female or male NPT thread EN/ANSI/TW/TTMA Up to 2.800 L/min Specified in configuratorPTFE
3” (DN80) Female or male NPT thread EN/ANSI/TW/TTMA Up to 3.850 L/min Specified in configuratorPTFE
4” (DN100) Female or male NPT thread EN/ANSI/TW/TTMA Up to 6.500 L/min Specified in configuratorPTFE
6” (DN150) Female or male NPT thread EN/ANSI/TW/TTMA Up to 14.400 L/min Specified in configuratorPTFE
8” (DN200) Female or male NPT thread EN/ANSI/TW/TTMA Up to 24.200 L/min Specified in configuratorPTFE




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