Zer-O-Pac Products

The spray or spray/scrubber deaerator has a wide product range from 3,500 #/hr to 500,000 #/hr and higher. It is best used for fairly stable loads and constant water inlet temperatures. It is the most economically priced unit in the 7,000 #/hr and higher flow range.

In the spray type unit, water is sprayed into a pressurized steam atmosphere (first stage deaeration) in order to preheat and partially deaerate the incoming water. The water is then directed to the scrubber (second stage deaeration), where the water is violently scrubbed to remove the final traces of oxygen. The steam acts as a carrier gas, to expel the removed oxygen out the deaerator vent. The deaerated water is then ready for use by the boiler, at saturated temperature and with oxygen levels at .005 cc/liter.

Customization of the spray type deaerator is available in any configuration including:

• Vertical orientation
• Dual compartment (deaerator with attached surge tank)
• Single skid deaerator/surge packages in over/under or end-to-end arrangements

The tray or spray/tray deaerator is our most versatile and rugged deaerator unit. It is offered in a range of 3,500 #/hr to 2,000,000 #/hr and higher. This unit can handle severe load swings, varying inlet water temperatures, and changing operating pressures while maintaining deaeration efficiency. It is typically priced higher than the other types of deaerators in a given size range.

In the tray type unit, water is sprayed into a pressurized steam atmosphere (first stage deaeration) in order to preheat and partially deaerate the incoming water. The water then cascades down through a series of stainless steel trays, while the countercurrent steam flow scrubs the remaining traces of oxygen out of the water. The steam acts as a carrier gas, to expel the removed oxygen out the vent. The deaerated water then falls into the horizontal storage section and is ready for use by the boiler, at saturated temperature and with oxygen levels at .005 cc/liter.

Customization of the tray type is available in any configuration including:

• Vertical orientation
• Dual compartment (deaerator with attached surge tank)
• Single skid deaerator/surge packages in over/under or end-to-end arrangements

Packed column type deaerators are generally used for very small boiler applications with a product range of 200 #/hr to 11,000 #/hr. This deaerator design is particularly efficient at deaerating very low flow rates. It is the most economically priced unit below 7,000 #/hr flow range.

In the packed column unit, water is sprayed into a pressurized steam atmosphere (first stage deaeration) in order to preheat and partially deaerate the incoming water. The water then cascades down through a vertical stainless steel column filled with stainless steel packing material, while the countercurrent steam flow scrubs the remaining traces of oxygen out of the water. The steam acts as a carrier gas, to expel the removed oxygen out the vent. The deaerated water then falls into the horizontal storage section and is ready for use by the boiler, at saturated temperature and with oxygen levels at .005 cc/liter.

The perfect match: A ZER-O-PAC Surge/Transfer System and a ZER-O-PAC deaerating system. Both are designed and manufactured by BFS Industries, a name associated with quality since 1946. 

A surge/transfer system is an important component in a steam system when there is a high volume of condensate returns, or the returns come back in “slugs.” A boiler surge tank will allow this condensate to be collected at varying rates and transfer the condensate/make-up mix to the deaerator under steady state conditions. 

ZER-O-PAC surge/transfer systems are available in 18 standard sizes ranging from 3,500 #/hr to 150,000 #/hr, with an unlimited selection of non-standard sizes and options.For additional information regarding surge system operation, see our discussion “When Should a Surge/Transfer Pump System Be Used with a Deaerator?”