Deaerators & Feedwater

DEAERATORS, CONDENSATE STORAGE TANKS & FEEDWATER PUMP PACKAGES

A steam boiler is only as reliable as the feedwater system supplied with it. Precision is one of a select few manufacturers you can trust to supply a total steam generating package—not just the right steam boiler or generator. We design and fabricate a broad range of feedwater collection and pumping systems, including ASME code deaerators as well as non-code condensate storage tanks. Precision’s engineers and sales representatives will work together to recommend the feedwater package that best fits the application’s steam demand profile and minimizes the volume of both make-up water consumed and the quantity of feedwater chemistry used. Precision will propose a total package solution that increases the system’s reliability, extends its life, and minimizes both maintenance and operating costs over time. In addition to deaerators (SP/spray and TR/tray) and condensate receivers (CF) with feedwater pump packages, we also offer chemical feed packages and water softeners to create a truly complete steam boiler room solution.

Central Steam Plant | Health Care | Industrial Process | Power Generation

CF Boiler Feedwater Systems

Capacities: 20 gallons to 950 gallons, support 15 BHP to 720 BHP size boilers
Standard Model: pumps selected and sized in accordance w/ ASME Power Boiler Code
Compliances: UL508A, ANSI/NFPA 79

Non-code condensate receiver tanks are recommended when there is a high rate of condensate return and minimal make-up water is required. Our CF systems are designed to receive condensate and prepare it for return to the boiler. They can also be paired with a DA to accommodate condensate surges that would otherwise be lost through the DA’s overflow drain.  Precision CF systems are custom designed to include the appropriate pump and control packages that best fit the application requirements.

  • Condensate receiving storage tanks are non-code, vented and fabricated from ¼-inch thick carbon steel, mounted on structural steel stand with pumps mounted on base, pre-piped and pre-wired prior to shipment (pump NPSH requirement determines stand height)
  • Feedwater pumps can be configured for various control setups, including: intermittent duty (on-off pump/motor control), continuous-run (with pump recirculation loop), or precisely modulated by a Variable Frequency Drive control for improved efficiency and energy savings
  • Standard water level control is a float activated make-up water valve that adds fresh water to replace condensate lost through the steam loop or to the process; the float assembly is installed inside tank (standard) or can be externally mounted and piped to sight-glass water column.
  • An optional Sparge-Tube Preheater installed inside storage tank below surface of condensate injects boiler supplied steam that reheats the condensate to prescribed temperature (212oF) before pumping it as feedwater to the boiler(s)
  • Control panel mounted on the stand contains fused magnetic starters, switches, lights, alarms, and controls
  • Most commonly used when there is a high rate of condensate return and minimal make-up water is required

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SP-DA

Capacities: Spray deaeration-5,000 PPH to 300,000 PPH; Storage-140 nominal gallons
to 6,000 nominal gallons of feedwater to overflow
Standard Model: vessels comply w/ latest ASME Deaerator and Storage Vessels Code, pumps are selected
and sized in accordance w/ ASME Power Boiler Code
Compliances: UL508A, ANSI/NFPA 79

Deaerators (DAs) are recommended when the steam system requires significant volumes of make-up water that must be treated to remove free oxygen and carbon dioxide from boiler feedwater.  Precision’s Spray-Type DA relies on internal spray valves, a vent condenser, and fresh steam to create conditions by which the make-up water releases the O2 and CO2 naturally, reducing the consumption of costly oxygen scavenging chemicals otherwise required to prevent corrosion leading to premature steam system failure.

  • Feedwater storage tank is equipped with internal, stainless steel vent condenser and spray valves that release free O2 and CO2 from make-up water supply as it enters tank; a pan collects the treated make-up and any condensate returns, then draining it via an internal downcomer to an internally mounted the scrubber pot which receives boiler supplied steam, using its latent heat to scrub O2 and CO2 from the make-up and condensate; together removing all O2 in excess of 0.005 cc/liter and reducing titratable free CO2 levels to zero
  • Deaerator and storage vessels are 50 psi design and fabricated to includes 1/16-in corrosion allowance, mounted on a structural steel stand with pumps mounted on the base, pre-piped and pre-wired prior to shipment (pump NPSH requirement determines stand height)
  • Can be configured for either intermittent duty (on-off) or continuous-run with recirculation loop or precisely modulated by a Variable Frequency Drive control for ease, efficiency and energy savings
  • Float activated make-up water valve adds fresh water to replace condensate lost through the steam loop; the DA float assembly is externally mounted, typically sharing the sight-glass water column; Precision also offers solenoid or air actuated valves with proportional control features for more precise level control
  • Control panel mounted on the stand contains fused magnetic starters, switches, lights, alarms, and controls
  • Most commonly used when significant make-up water is required

O&M Manual

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TR-DA

Capacities: Tray deaeration-5,000 PPH to 500,000 PPH; Storage-110 gallons to 10,000 gallons of feedwater to overflow
Standard Model: vessels comply w/ latest ASME Deaerator and Storage Vessels Code, pumps are selected and sized in accordance w/ ASME Power Boiler Code
Compliances: UL508A, ANSI/NFPA 79

Deaerators (DAs) are recommended when the steam system requires significant volumes of make-up water that must be treated to remove free oxygen and carbon dioxide from boiler feedwater.  Precision’s Tray-Type DA is the best choice for large stream flows where limited condensate return creates a large demand for makeup water. The Tray Type DA relies on internal spray valves, a cascading series of trays, a vent condenser, and fresh steam to create conditions for large flows of make-up water to release the O2 and CO2 naturally. Investing in a Tray-DA reduces dramatically the consumption of costly oxygen scavenging chemicals otherwise required to prevent corrosion leading to premature steam system failure.

  • The upper deaeration vessel is equipped with internal, stainless steel vent condenser and spray valves that release free O2 and CO2 from make-up water as it enters top of vessel; condensate returns and boiler supplied steam enter same vessel from the sides, heating make-up water as it gravity flows down through a stacked column of trays to enter the lower storage vessel; the latent heat from the steam combined with the increased surface area of the trays drives more free O2 and CO2 from the water, together removing all O2 in excess of 0.005 cc/liter and reducing titratable free CO2 levels to zero
  • Deaerator and storage vessels are 50 psi design and fabricated to include 1/16-in corrosion allowance; are mounted on a structural steel stand above the feedwater pumps that are mounted on the base; pumps, motors and controls are pre-piped and pre-wired prior to shipment (pump NPSH requirement determines stand height)
  • Can be configured for either intermittent duty (on-off) or continuous-run with recirculation loop or precisely modulated by a Variable Frequency Drive control for ease, efficiency and energy savings
  • Float activated make-up water valve adds fresh water to replace condensate lost through the steam loop; the DA float assembly is externally mounted, typically sharing the sight-glass water column; Precision also offers solenoid or air actuated valves with proportional control features for more precise level control
  • Control panel mounted on the stand contains fused magnetic starters, switches, lights, alarms, and controls
  • Most commonly used for large steam flows where significant make-up water is required

O&M Manual

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Chem Feed

Capacities: vary by unit
Standard Model: ASME construction

Precision chem feed packages offer an extra measure of protection against corrosion and scaling in your steam system, to maintain peak efficiency and improve the performance of your entire boiler package. When treatment chemicals are required to protect your boiler system, our chem feed packages save time and money with complete packages and easy installation.

  • Polyethylene storage tank mounted on a structural steel stand
  • Complete ready-to-use package includes feed pumps, piping valves, and controls, saving time and money
  • Most convenient method of introducing treatment chemicals into a closed loop steam system

Surge Tanks

Capacities: 20 gallons to 950 gallons, support 15 BHP to 720 BHP size boilers
Standard Model: selected and sized in accordance w/ ASME Power Boiler Code
Compliances: UL508A, ANSI/NFPA 79

Usually paired with a deaerator to provide additional condensate storage capacity when operating conditions cause a sudden surge of condensate return that would otherwise overwhelm the storage capacity of the DA and be lost through the overflow to the drain. Our Surge Tanks are essentially CF packages without the preheater. Precision surge tanks are pre-mounted, piped, and wired condensate receiving storage tanks, with a float activated make-up water valve that adds fresh water to replace condensate lost through the steam loop to maintain sufficient water level inside the tank.

  • Condensate receiving storage tanks are non-code, vented and fabricated from ¼-inch thick carbon steel, mounted on structural steel stand with pumps mounted on base, pre-piped and pre-wired prior to shipment (pump NPSH requirement determines stand height)
  • Can be configured for either intermittent duty (on-off) or continuous-run with recirculation loop for ease, efficiency and energy savings
  • Float activated make-up water valve adds fresh water when the rate of condensate return is insufficient to maintain the water level in the companion DA; level control is normally a float assembly either installed inside tank (standard) or externally mounted and piped to sight-glass water column
  • Control panel mounted on the stand contains fused magnetic starters, switches, lights, alarms, and controls
  • Surge Tanks are most commonly used when the steam system flows are large and multiple processes coming on and off can create surges of return condensate

O&M Manual

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