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Bladder Expansion Tanks

Bladder tankWestrol type NLA removable bladder expansion tanks are designed for use in Hydronic heating/cooling systems to absorb the expansion force resulting from the changes in temperature of the heating/cooling fluid.

As the system fluid expands, it is forced into the precharged tank to the maximum system pressure. The precharged air cushion then forces the fluid back into the system as it contracts. The extra heavy butyl bladder keeps the fluid permanently isolated from the precharged air cushion. This arrangement eliminates water logging and absorption of air into the system. It also helps prevent air bound terminal units, excessive corrosion, inefficient balancing and pump cavitation over the life of the system.

The large acceptance volume allows maximum storage and reduction of up to 80% in tank size. Energy consumption is reduced by eliminating unnecessary system water volume. For thermal installations use Westrol type TXA or TTA for potable hot water applications.

Size Your Tank

Were you looking for a non-replaceable bladder tank?

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ASME StampNLA Series (ASME)

The NLA is the industry’s broadest line of bladder style tanks with a range of features that include:

  • ASME certified
  • Heavy-duty replaceable butyl bladder
  • Sizes range from 10 to 4,000 gallons
  • Working pressures of 125 psi (std), 200 and 250 psi

NLA 35-800L
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NLA 35-800L HP (High Pressure)
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NLA 1000-15000
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NLA 1000-15000 HP (High Pressure)
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ASME StampNVA Series (ASME)

  • ASME certified
  • Bottom system connection design
  • Heavy-duty replaceable butyl bladder
  • Sizes range from 20 to 4,000 gallons
  • Working pressures of 125 psi (std), 200 and 250 psi

NVA 85-800L
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NVA 1000-15000
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NLAP Series (ASME)

ASME Stamp

NLAP Expansion Bladder Tanks:

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NL Series (Non-ASME)

Non asme

NL Expansion Bladder Tanks:

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