Anti Tamper Interlock

Product Model: H-ATiL

ENEX i-LOCK Series H-ATiL is the heavy industry ‘Anti Tamper’ Mechanical Trapped Key Safety Interlock product range. It is suitable for isolating multi-turn valve movement in any position (between fully open and fully closed) when the Interlock Operating Key is removed. This allows each valve to be controlled, set and flow rate maintained while isolating the valve from any un-authorised operations.

The basic principle of this safety equipment is that the Interlock will only be engaged with the valve yoke drive when the Safety Interlock Key is inserted and rotated 90°.

When the Safety Interlock Key is removed, the Interlock handwheel and main interlock housing will rotate freely without altering the valve position.

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

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

  • Key entry rotation or key removal rotation
  • Valve positioning

Industries that utilise the H-ATiL 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-ATiL product range is installed are :

  • Critical flow volume lines
  • Valve ‘mid position’ Isolation Requirements
  • Transfer Flow Line Systems

H-ATiL Product Deisgn complice 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-ATiL 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 capsStainless Steel AISI 316L
3Internal Locking MechanismStainless Steel AISI 316L
4Body Securing Bolts & FastenersStainless Steel A2 Class 70
5Handwheel (supplied to nearest original equipment size)Stainless Steel AISI 316L
6Anchor & Adaptor (be-spoke design to suit host equipment - not shown)Stainless Steel AISI 316L
7Operating KeyStainless Steel AISI 316L
8Name Plate, Lock Portion and Key TagsTroPly

Model No.Height

1. 2.3.4. 5.6. 7.
HHeavy Industry
ATAnti-Temper Interlock
Standard if un-coded
Son/off switch
S(Ex)Ex rated on/off switch
LLimit sensor
L(Ex)Ex rated limit sensor
OSingle key - locked open only
CSingle key - locked closed only
DDuel key - locked open & closed
 Standard if un-coded
XSpecial Build