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Enardo™ Model ES-665 and ES-665-L Spring-Loaded Thief Hatch
The Model ES-665 is a new generation hatch designed with precision-manufactured internal components, a round base and cover, and is intended for use in applications where ultra-tight sealing is required such as sour crude/gas or where strict environmental emissions standards are enforced.
Enardo™ Model ES-665 and ES-665-L Spring-Loaded Thief Hatch


Tight to 0.10 SCFH at 90% of set pressure, at 68°F / 20°C
Pressure Settings
4, 6, 8, 12, 16, 24 and 32 oz./sq. in.
Vacuum Settings
0.4, 0.9 and 3.5 oz/sq in
Bolt Pattern
8 in. API
Casting: Aluminum
Pressure Gasket: HNBR (standard), Fluorosilicone, Viton, EPDM
Vacuum Gasket: Fluorosilicone (standard), Viton, EPDM Food Grade
Optional Equipment: Base Gasket, Bolt Set, Non-Corrosive Coating, Bonding Strap, Thrust Bearing


  • Enhanced Sealing Technology
  • Tank Gauging
  • Pressure Control
  • Vacuum Control


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