Emerson’s Enardo ES-665 Thief Hatch Reduces Storage Tank Emissions

Emerson Automation Solutions introduces the Enardo ES-665 spring-loaded thief hatch for use on low-pressure storage tanks in oil and gas and other industries. The ES-665 is reportedly engineered with increased sealing forces and a tight and consistent fit of the sealing surfaces. The resulting emissions performance of the Enardo ES-665 thief hatch is 0.10 SCFH (standard cubic feet/hour) at 90% of setpoint*. The Enardo ES-665 also helps conserve tank contents.

The ES-665 provides tank access as well as pressure and vacuum relief to accommodate tank pressure changes that occur under normal conditions. The ES-665 also limits hatch emissions when pressure or vacuum relief is not required.

In addition to its emissions performance, the ES-665 includes: 

  • An available center assembly for improved performance of previously installed models.
  • Multiple relief settings and material options for application flexibility.
  • A latching and lockable lid for added security and safety. 

 * Based on testing at ambient conditions in accordance with API (American Petroleum Institute) 2000 and competitive published data.​

Environmental protection
Product Type:
Emerson Automation Solutions