Loading Arm Interlock

Product Model: H-LAiL

ENEX i-LOCK Series H-LAiL is the heavy industry Loading Arm Mechanical Trapped Key Safety Interlock product range and is part of the Transfer Loading Bay product system The HLAiL allows for 1 to 3 modular units fitted back to back to cover an array of operational procedures.

For a dual key system, the basic principle of this safety equipment is when the first key is trapped the front lock portion the bolt is extended and is locking the host equipment in the lock position, there is also no key in the second lock portion. To unlock the host equipment, insert the ‘free’ key in the rear lock portion and rotate key 90°, this will initiate the internal locking mechanism to release the front key which can be removed by rotating the key 90°.

The host equipment can now be operated. Each ‘Patented’ lock portion and rotary key is uniquely coded to allow a truly safe operating sequence procedure. Keys and Lock Portions can also be code so that any number of Keys and Lock portions have identical codes.

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

  • Actuator Movement
  • Key rotation

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

  • Loading & Off-Loading Bay Systems
  • Transfer Line Systems

  • SHELL DEP Specification
  • EQUINOR TR2315 Final Ver 5.02
  • 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

  • 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
  • Can be installed to host equipment under live process conditions
  • No interference or intrusion with of the host equipment pressure envelope
  • Anchor & Adaptor units designed and manufactured to suit the host equipment
  • 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

ItemPart DescriptionMaterial
1BodyStainless Steel AISI 316L
2Lock portion & ingress protection capsStainless Steel AISI 316L
3Internal Locking MechanismStainless Steel AISI 316L
4Body Securing Bolts & FastenersStainless Steel A2 Class 70
5Operating KeyStainless Steel AISI 316L
6Name Plate, Lock Portion and Key TagsTroPly

Model No.Height

(Note : dimensions are excluding bespoke actuator)

1. 2.3.4. 5.-6.
HHeavy Industry
LALoading Arm 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