The Type T205B balanced tank blanketing regulator (Figure 1) is a direct-operated regulator with fully balanced plug design to reduce inlet pressure sensitivity and with a large diaphragm to accurately control tank pressure at low pressure settings on tank blanketing systems. It uses a control line to sense the pressure in an enclosed storage tank. The Type T205B maintains a slightly positive pressure and
thereby reduces the possibility of tank wall collapse during pump out operation.
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 Range(1)
See Table 2
Shutoff Classification per ANSI/FCI 70-3-2004
Class VI (Soft Seat)
Pressure Registration
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
1/2 NPT
Approximate Weight
17.7 pounds / 8 kg
