DREWPLEX® AT

DESCRIPTION

DREWPLEX AT boiler water treatment is a phosphate-based treatment combined with synthetic polymers providing the ultimate in simplicity, system flexibility and treatment control for low and medium pressure boilers. DREWPLEX AT boiler water treatment provides a cleaner boiler by allowing greater tolerance of feedwater quality fluctuations. The polymers in DREWPLEX AT boiler water treatment serve as deposit control agents by adsorbing onto the surface of boiler water precipitates, keeping the particles soft, non-adherent and easily transported through blowdown. Iron
dispersancy is also achieved with DREWPLEX AT boiler water treatment by sequestering deposits caused by iron. Moreover to combining alkalinity control, scale inhibitors and deposit control, DREWPLEX AT boiler water treatment provides protection from corrosion in the after boiler section
caused by low pH. When coupled with DREWPLEX OX corrosion inhibitor, DREWPLEX AT boiler water treatment provides the most modern, safe and effective approach to a boiler water treatment program. DREWPLEX AT treatment may also be used with AMERZINE® or AMERSITE CHZ corrosion inhibitors.

DREWPLEX AT boiler water treatment is NSF registered as a nonfood compound under category G6, a water treatment product used in boiler steam lines for food contact in food processing establishments. It is also registered under category G7, a water treatment product used in boiler steam line for nonfood contact in food processing establishments.

APPLICATION

  • Dosage, Testing and Control

Continuously dose diluted DREWPLEX AT treatment with diluted DREWPLEX OX corrosion inhibitor or AMERZINE corrosion inhibitor using the DREW™ Beta Metering System to the feedwater line downstream of the feedwater recirculation off take, which returns water to the hot well or cascade tank. If there is no feedwater recirculation, dose continuously to the feed pump suction. A less preferred method is a gravity feed flowmeter arrangement because volatiles can be lost as the recirculated water is returned to the hot well or cascade tank. If a gravity feed flowmeter arrangement is used, the dosage point should be to the hot well or cascade tank. The chemical feed line should extend below the normal water level (approximately 1 meter) and as close to the feed pump suction as possible. DREWPLEX AT treatment should be diluted with distilled water or condensate in the dosage tank and dosed continuously over a 24-hour period in keeping with system demands. Daily dosage will depend on system capacity, purity
and quality of condensate returns and the quality and amount of makeup water to the system. The recommended initial dosage of DREWPLEX AT treatment is 2.5 to 5 liters per ton of water in the boiler system. Once the system has been initially dosed and is in operation, the daily hydrate alkalinity test result determines the necessary dosage. DREWPLEX AT treatment dosage and blowdown are determined by simple boiler water tests. Testing for hydrate alkalinity in the boiler water determines the DREWPLEX AT treatment dosage. Testing for neutralized conductivity in the
boiler water determines the blowdown. For details on testing procedures, refer to the DREWPLEX AT treatment and DREWPLEX OX corrosion inhibitor control and dosage chart, or the DREWPLEX AT treatment and AMERZINE® corrosion inhibitor control and dosage chart, or contact your local Drew Marine representative.

  • Makeup Water Quality

The main purpose of a boiler water treatment program is to keep the boiler free of deposits and corrosion. The most efficient method for keeping the boiler free of deposits is to use distilled makeup water. DREWPLEX AT boiler water treatment is formulated to handle feedwater hardness upsets.

  • Blowdown

Good blowdown procedures are important to the effectiveness of any boiler water treatment program and should be carried out according to the boiler manufacturer’s instructions. Surface blowdown is necessary to reduce dissolved and suspended solids. Normal maintenance surface blowdown is sufficient up to a neutralized conductivity of 700 μS/cm. Above a neutralized conductivity of 700 μS/cm, the frequency of surface blowdown should be increased. Furthermore, weekly flash-blowdown of the header drains or steam separator (where applicable) is suggested to minimize sludge accumulations.

FEATURES

  • Dispersant properties
  • Crystal modifiers
  • Sludge conditioning
  • Neutralizing amine
  • Phosphate and alkalinity treatment
  • Simple feed and control

BENEFITS

  • Keeps particles in suspension
  • Prevents scale buildup on tubes
  • Promotes efficient heat transfer
  • Soft sludge easily removed by blowdown
  • Cleaner boiler
  • Less downtime
  • Fewer acid cleanings
  • Lower maintenance costs
  • Condensate pH corrosion control
  • Scale inhibition
  • Operator ease

TYPICAL PHYSICAL PROPERTIES

AppearanceLight brown liquid
Specific Gravity @ 25° C1.080
Flash Point (PMCC)None
Freezing Point-8.8° C
pH (Neat)13.4
Freeze/Thaw StabilityComplete
Relative density (Water=1)1.08
Evaporation rate>1 EtAC=1
Upper Explosive Limit (%)10.8
Lower Explosive Limit (%)1.8
Vapour pressure (kPa)2.3
Solubility in waterMiscible
NOTE: Always wear the appropriate personal protective equipment when using this product.

PACKAGING

DREWPLEX AT boiler water treatment is available in 25- liter pails (PCN 6598405).

Get it now