Stairs & Gantry Interlock

Product Model: H-SiL

ENEX i-LOCK Series H-SiL is the heavy industry Stairs / Gantry Mechanical Trapped Key Safety Interlock product range and is part of the Transfer Loading Bay product system The H-SiL 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-SiL product range can be supplied with on/off switches and proximity limit sensors to confirm :

  • Actuator Movement
  • Key rotation

Industries that utilise the H-SiL product range are :

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

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

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

H-SiL Product Design compliance 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-SiL 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
  • Can be installed to host equipment under live process conditions
  • No interference or intrusion of the host equipment pressure envelope
  • Anchor & Adaptor units designed and manufactured to suit the host equipment
  • Handwheel diameter is sized and selected to maintain host equipment operating torques
  • 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
1BodyStainless Steel AISI 316L
2Lock portion & ingress protection cap assemblyStainless Steel AISI 316L
3Main Drive UnitStainless Steel AISI 316L
4Internal Locking MechanismStainless Steel AISI 316L
5Body Securing Bolts & FastenersStainless Steel A2 Class 70
6Name Plate, Dust Cap Tag and Key TagTroPly

Model No.Height

1. 2.3.4. 5. 6.
HHeavy Industry
SStairs / Gantry 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