Closed Type Expansion Tank
Expansion tank shall be closed type. The tank shall be insulated with 25 mm thick, closed cell foam
insulation. Its safety accessories shall be provided as ASME codes.
Closed type expansion tank consists of a set of devices as defined in the drawing.
Expansion tank capacity (Tank volume) as defined in the drawing.
• Body type shall be Hydro-pneumatic Tank.
• Shell shall be fabricated steel structures accordance with ASME code.
The operating pressure is not less than 125 Psig.
• Bladder shall be heavy duty butyl rubber and is replaceable. The operating pressure is not less
than a tank. Temperature is not less than 240 °F.
• The tank consists of hand hole for removed bladder set and air charging valve, drain port with
plug.
Pressure limit switch that transmits a signal to turn - off motorized valve. The pressure limit switch
can be adjust cut in and cut off pressure. The operating pressure is not less than 125 Psig.