Selector Exchange Interlock

Product Model: H-SEiL

ENEX i-LOCK Series H-SEiL is the heavy industry selector exchange Mechanical Trapped Key Safety Interlock product range.

It is suitable for a wide range of applications such as complex high voltage switching systems, HIPPS system change over systems, process system change over and maintenance procedure switching systems.

The H-SEiL ‘Patented’ lock portions and keys allow for any combination of key sequence procedural systems.

The basic principle of this safety equipment is to safely control the switch over between two different process systems by utilising a key sequence principle.

Each lock portion and rotary key is uniquely coded to allow a truly safe operating sequence procedure.

H-SEiL product range can be supplied with on/off switches and proximity limit sensors to confirm:

  • Key entry rotation or key removal rotation
  • System switch over positioning

Safety System Applications that are enhanced when the H-SEiL product range is installed are:

  • Process Switch Over Systems
  • HIPPS Change Over Systems
  • Complex Shutdown of High Voltage Switch Systems
  • Plant Maintenance Switch Over Systems

Industries that utilise the H-SEiL product range are:

  • Chemical
  • Energy
  • Marine
  • Mining
  • Mineral & Cement
  • Oil & Gas
  • Petrochemical
  • Power Generation
  • Pulp & Paper
  • Refining
  • Water & Utilities

H-SEiL Product Design complies to the following specifications:

  • SHELL DEP Specification
  • EQUINOR TR2315 Final Ver 5.02 Specification
  • ISO/TS 19837:2018 - Technical Specification
  • ISO 14119:2013 (formally EN1088)
  • Salt Mist Test (Lloyds Test Spec No 1)
  • Fire Test (API 607 & ISO 10497:2010)
  • High Temp Test 70c (EN 60068-2-2:2007)
  • High Humidity Test (EN 60068-2-2:2007)
  • Static and Dynamic Inclination (IEC 60092-504:2001)
  • Ultra Low Temp -57c (EN 60068-2-1:2007)
  • Vibration Test (EN 60068-2-6:2008)
  • Ingress Protection Test (EN 60529:1992 Amd 1&2)
  • Directive 2006/42/EC

H-SEiL product range has the following 'Best in Class' design features:

  • UK Designed, Engineered, Manufactured, Assembled & Tested Products
  • Minimum 3 billion - billion! ‘unique’ Rotary Key Code permutations from the ‘Patented’ Lock Portion & Key Design. We stopped counting at 3 billion !
  • Ultimate Safe and Secure Mechanical Interlock Design
  • Defeat, override & tamperproof compliant
  • Solid and robust construction with no cast parts
  • Materials of construction : Stainless Steel
  • Unique ‘Patented’ Lock Portion & Key Design
  • Lock Portion and Key Design have been tested to over 200’000 cycles
  • Lock Portion and Keys include ‘over torque’ protection mechanism as standard
  • Tamper proof and copy proof body housing, lock portions and keys
  • Unique ENEX i-LOCK tamper proof securing bolts
  • Unique on the ‘Patented’ key is that the code and drive members function independently
  • One single Master Key covers site installed Key Code permutations
  • Ultimate product design for normal, harsh and corrosive environments
  • Spring loaded Lock Portion Ingress Protection & Weather Seals Dust Caps
  • No interference or intrusion with any host equipment pressure envelope
  • Product serial number traceability on every unit
  • Secure mechanical fixing of all labels and tags
  • Full colour coded key & dust cap tagging option for enhanced error elimination
  • Pad lockable dust covers are an option for lockout hasp and scissor hasps operation

ItemPart DescriptionMaterial
1BodySt/St AISI 316L
2Main Drive UnitSt/St AISI 316L
3Lock Portion & Ingress Protection CapSt/St AISI 316L
4Internal Locking MechanismSt/St AISI 316L
5Body Securing Bolts & fastenersSt/St A2 Class 70
6KeysSt/St AISI 316L
7Name Plate, Lock Portion and Key TagsTroPly

Model No.Height
H-SEiLmmDepending on SystemDepending on SystemDepending on System

1. 2.3.4. 5.
HHeavy Industry
SESelector Exchange Interlock
 Standard if un-coded
Son/off switch
S(Ex)Ex rated on/off switch
LLimit Sensor
L(Ex)Ex rated limit sensor
 Standard if un-coded
XSpecial Build