Long Pan, dual combination thief hatch. Ideal for oilfield tanks as base contains spills after samplling. Unit is lockable, with a spring loaded aluminum cover and cast iron base. Standard gasket material is Buna-N with other gasket material available. Settings of 4 oz pressure and .4 oz vacuum are standard.
Flange bolt pattern conforms to API pattern.
Bolt Pattern: (16) – 1/2″ dia holes on a 10 3/8″ B.C.