The Model L12-TH Thief Hatch outperforms the competition with industry-leading flow rates and precision tolerances to provide a superior sealing performance. Leakage rates less than 1 SCFH at 90% of set pressure keeps your tanks industry-standard compliant.
The L12-TH incorporates a spring-loaded pressure/vacuum relief valve within the hatch. Install the L12-TH on steel or fiberglass (FRP) low-pressure oil tanks to provide access for level gauging, sampling and overpressure/vacuum protection, all in one compact design.
Size: 8″ (200 mm)
Bolting: API 12
Pressure settings: 4, 6, 8, 10, 12, 16, 24 and 32 osig*
Vacuum settings: 0.4, 0.9 and 3.5 osig
Casting: aluminum (non-sparking)
Envelope gasket: HNBR, FKM or fluorosilicone
Vacuum diaphragm: HNBR, FKM, fluorosilicone or fluoropolymer
Leak rate: 1 SCFH air @ 90% of set pressure
Additional pressure settings are available.
|A (Closed)||D (Open)|
|B (Closed)||C (Open)|
GKT12TH08K302 = Non-Asbestos
GKT12TH087602 = FKM
GKT12TH087102 = PTFE
GKT12TH084402 = Black Neoprene
GKT12TH083502 = Buna-N
GKT12TH08CJ02 = FKM (Blue)
GKT12TH08BO02 = Fluorosilicone
KS12THBS08P01 = Hex Nut and Bolt Set – Zinc Plated Steel
KS12THBS08P02 = Hex Nut and Bolt Set – 18-8 Stainless Steel
ADP12TH080101 = Flange Adapter – 8” 150# ASME to 8” API 12 – Aluminum
ADP12TH082001 = Flange Adapter – 8” 150# ASME to 8” API 12 – Carbon Steel
ADP12TH082002 = Flange Adapter – 8” x 18” Oblong to 8” API 12 – Carbon Steel
ADP12TH082003 = Flange Adapter – 8” x 22” Oblong to 8” API 12 – Carbon Steel
ADP12TH080104 = Y Adapter – 8″ API 12 – Aluminum
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Long Pan Thief Hatch
The L12-TL incorporates a large working surface, larger cover, and a gauging and sampling hook into the base. The base is inclined to match the slope of the API12 tank’s roof to provide a level working surface. A bonding strap and SLIC™ pins come standard with the L12-TL.View Long Pan Thief Hatch chevron_right
Use the L1220A to pipe away vapors in pressure and vacuum relief systems. The L1220A routes vapors through a flanged outlet connection, providing increased fire protection and safety.View Pipe-Away chevron_right
Pressure Relief Valve
The L2300A provides emergency relief capacity above what can be supplied by standard operating valves. Use it to protect tanks, piping and low-pressure vessels from internal pressure damage.View Pressure Relief Valve chevron_right
Vent to Atmosphere
Model L1200A protects your tanks from damage created by overpressure or excessive vacuum. It reduces costly product evaporation losses due to normal tank “breathing.” It also minimizes atmospheric contamination by retaining toxic vapors, providing increased fire protection and safety.View Vent to Atmosphere chevron_right
We don’t manufacture until you order. Our production team employs the latest tools and techniques in agile manufacturing to fabricate your order to your specifications. After production and assembly, each product undergoes stringent quality inspections before leaving the production floor – we guarantee you’ll get exactly what you ordered.