Introducing the GROTH 12-TH Thief Hatch

The GROTH Model 12-TH Thief Hatch was designed to out perform the competition, with industry leading high flow rates and precision tolerances to provide a superior sealing performance.

SUPERIOR SEALING PERFORMANCE

The leakage is less than 1 SCFH of air @ 90% of the set pressure.

Why Thief Hatches are required?

Because we always make sure that:

Protect your tanks

Protects tank from overpressure/vacuum when sized properly.

Saves money

Avoid environmental standards fines and Minimize loss of product.

Meet industry compliance

Minimizes evaporation emissions.

Features & Benefits

Superior Sealing Performance

Precision machining and manufacturing to accomplish superior sealing.
Ultra-tight sealing reduces product leakage and fugitive emissions.
Active envelope pressure gasket that expands around the base to increase seal

Industry Leading Flow Rates

Higher flow capacity to protect from excessive pressure build up.
Precision machining and manufacturing to accomplish high flow rates

Direct Replacement & Easy Maintenance

Direct replacement for any standard round API 12 thief hatch.
Designed for easy maintenance, thus reducing downtime and lowering operational cost.
Incorporates a mechanical lock system to be used with a pad lock or lock out bar

Technical Details

Size: 8” (200 mm)
Bolting: API 12
Available Pressure Settings: 4, 6, 8, 12, 16, 24 & 32 osig
Available Vacuum Settings: 0.4, 0.9 & 3.5 osig
Leak Rate: 1 SCFH air @ 90% of set pressure
Materials of Construction: Casting: Aluminum (Non-Sparking), Envelope Gasket: HNBR, FKM, or Fluorosilicone, Vacuum Diaphragm: HNBR, FKM, Fluorosilicone, or Fluoropolymer
Optional: Polyester/PTFE Coating
Accessories: Flange (base) Gasket, Mounting Kit