The T205 Series tank blanketing regulator is a direct- operated and spring-loaded regulator. The regulator prevents a stored liquid from vaporizing into the atmosphere, reduces liquid combustibility and prevents oxidation or contamination of the product by reducing its exposure to air. The T205 Series maintains a slightly positive pressure and thereby reduces the possibility of tank wall collapse during pump out operation. The T205 Series is available in two confi gurations: Type T205 for internal pressure registration requiring no downstream control line and Type T205M which has a blocked throat and a downstream control line connection for external pressure registration.
Product Configurations
Type T205: Tank blanketing regulator with outlet pressure range of 1 inch-w.c. to 7 psig / 2.5 mbar to 0.48 bar in seven different spring ranges and has internal pressure registration requiring no downstream control line.
Type T205M: Similar to Type T205 but has a blocked throat and a downstream control line connection for external pressure registration.
Body Sizes and End Connection Styles
See Table 1
Maximum Allowable Inlet Pressure(1)
See Table 1
Maximum Operating Inlet Pressure(1)
Gray cast iron: 150 psig / 10.3 bar
WCC Carbon steel or CF8M/CF3M Stainless steel: 200 psig / 13.8 bar
Maximum Outlet (Casing) Pressure(1)
Gray cast iron: 35 psig / 2.4 bar
WCC Carbon steel or CF8M/CF3M Stainless steel:
75 psig / 5.2 bar
Maximum Emergency Outlet Pressure to Avoid Internal Parts Damage(1)
With Nitrile (NBR) or Fluorocarbon (FKM) diaphragm: 35 psig / 2.4 bar
With Fluorinated Ethylene Propylene (FEP) diaphragm: 20 psig / 1.4 bar
Outlet (Control) Pressure Ranges(1)
See Table 3
Shutoff Classification per ANSI/FCI 70-3-2004
Class VI (Soft Seat)
Pressure Registration
Type T205: Internal
Type T205M: External
Material Temperature Capabilities(1)(2)
Nitrile (NBR): -20 to 180°F / -29 to 82°C
Fluorinated Ethylene Propylene (FEP): -20 to 180 °F / -29 to 82 °C
Fluorocarbon (FKM): 40 to 300°F / 4 to 149°C
Ethylene Propylene Diene (EPDM):-20 to 225°F / -29 to 107°C
Perfluoroelastomer (FFKM): 0 to 300°F / -18 to 149°C
Spring Case Vent Connection
1/4 NPT
Diaphragm Case Control Line Connection (Type T205M)
1/2 NPT
Approximate Weight
17.7 pounds / 8 kg
