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Model L12-TH
The LaMOT Valve & Arrestor Model L12-TH Thief Hatch incorporates a spring loaded pressure/vacuum relief valve within the device. Thief Hatches are used on steel or fiberglass (FRP) low pressure storage tanks. The hatch has a gauging hook integrated to the base to be used while sampling the tank, providing access for level gauging, sampling, and overpressure/vacuum protection for the tanks, all in one compact design. Superior sealing is achieved from an active envelope pressure gasket that expands around the base to increase seal until the designated pressure setting is reached. This design saves you money by greatly reducing vapor loss compared to a traditional thief hatch design.
• Each Hatch is individually tested and certified at factory
• Each hatch has its own serial number – for tracking and traceability
• Precision machining and manufacturing to accomplish superior sealing
• Leak Rate less than 1.0 SCFH at 90% of set pressure
• Ultra-tight sealing reduces product leakage and fugitive emissions
• Industry leading flow rates
• Higher flow capacity to protect from excessive pressure build up
• Precision machining and manufacturing to accomplish high flow rates
• Active envelope pressure gasket that expands around the base to increase seal
• Three Ear Center Assembly – better alignment and stronger, less breakage
• Pressure gasket is captured in the center assembly by groove
• SLIC Pins used on lid hinge, latch hinge and latch lock pin – less time for maintenance
• Rear hinge is precision machined – provides superior alignment and sealing
• Incorporates a mechanical lock system to be used with a pad lock or lock out bar
• Bonding Strap is standard equipment
• L12-TH convertible to a Lockdown Hatch with LVA conversion kit (L-Kit)
• Superior emission performance validated by End User FLIR inspection
• *Optional Thrust Bearing (Must be ordered with “Hatch” or “Center Assembly” for in the field replacement)
• Size: 8”
• Bolting: API 12
• Available Pressure Settings: 4, 6, 8, 10, 12, 16, 24, & 32 osig
• Available Vacuum Settings: 0.4. 0.9 & 3.5 osig
• Leak Rate: Less than 1 SCFH of Air @ 90% of Set Pressure
• Casting: Aluminum (non-sparking)
• Envelope Gasket: HNBR, FKM or Fluorosilicone
• Vacuum Diaphragm: HNBR, FKM, Fluorosilicone or Fluoropolymer
• Springs: Galvanized Steel or Inconel® X-750
• Polyester/PTFE Coating
• Flange (base) Gasket
• Mounting Kit
• Adapters
Select your specifications below to generate a custom product number.
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Model #
Size
Body Material
Envelope Gasket
Vacuum Diaphragm
Spring Material
Pressure Setting
Vacuum Setting
Options
Model #:
Size:
Body Material:
Envelope Gasket:
Vacuum Diaphragm:
Spring Material:
Pressure Setting:
Vacuum Setting:
Options:
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Model L12-TL
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.
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Model L1220A
Private: Pipe-Away
The LaMOT Valve and Arrestor Model L1221B Pressure/Vacuum Relief Valve is designed to protect your tank from damage created by overpressure or excessive vacuum. Costly product evaporation losses due to normal tank “breathing” are greatly reduced. Because the 1200 Series products retain toxic vapors, atmospheric contamination is minimized which helps to provide increased fire protection and safety.
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Model L2300A
Private: 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.
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Model L1201B
Vent to Atmosphere
The LaMOT Valve and Arrestor Model L1201B Pressure/Vacuum Relief Valve is designed to protect your tank from damage created by overpressure or excessive vacuum. Costly product evaporation losses due to normal tank “breathing” are greatly reduced. Because the L1200 Series products retain toxic vapors, atmospheric contamination is minimized which helps to provide increased fire protection and safety.
View Vent to Atmosphere chevron_rightWe 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.