Ready for Acid Service

  • Building off the reliability of the Model 300 TVTH, the Model 400 Acid Service variant comes standard with inconel spring and trim, as well as a coating that resists long-term exposure of up to 32% HCl acid.

Flush Top-Mount design

  • The pressure and vacuum relief mechanism operates above the tank roof to maintain functionality if the thief hatch opening is irregular or under size.

Variety of Pressure Settings

  • The Model 400 Acid Service TVTH is available with factory-set pressure relief settings of 4, 8, 16 and 32 ozsi. Other settings available with increased lead times and MOQ.
  • Vacuum relief is fixed at 0.4 ozsi.


Function Venting Gauge Hatch; Tank Access + Pressure & Vacuum Relief
Temperature Range -25°C to 205°C (TVTH 300, eFKM).
Pressure Relief Type Spring-loaded pallet
Pressure Relief Range 4 to 32 ozsi (see Relief Settings)
Vacuum Relief Range 0.4 ozsi fixed
Tank Connection 8” API (Fig 1 API 12F)

Related Documents


Download Brochure


Coating Specification Sheet

Vent Sizing Charts

Download Vent Sizing Charts

Ordering Information

Model 400 Acid Service TVTHs are stocked in Edmonton, ready to ship 1-day or less.

For Acid Service

  1. Specify Model 400 TVTH Acid Service
  2. Specify Pressure Relief Setting (4, 8, 16 or 32 ozsi).

See brochure for more information.

Consider completing your Model 400 Acid Service TVTH Installation with a Bolt Kit and Tank Gasket.

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