VITEC

Vitec® 3000

Antiscalant/Dispersant

Vitec® 3000 is a proprietary liquid antiscalant/dispersant designed to inhibit scale and disperse colloidal particles in cellulose acetate and thinfilm membrane separation systems. The formulation has been certified by the National Sanitation Foundation (NSF) under ANSI/NSF Standard 60 for use in producing potable water.

This formulation is compatible with organic coagulants. Coagulants may be indirectly present in municipal feed waters or directly present as a result of coagulation or flocculation treatments upstream of the reverse osmosis system.

Vitec® 3000 can be injected neat or diluted and can be used in a wide array of feedwater sources.

Performance:

Vitec® 3000 antiscalant offers a variety of critical performance and application benefits:

• Powerful inhibitor against a variety of carbonate and sulfate scale:

  CaCO3	CCPP > 900 (LSI >2.5)
  CaSO4	3.5 x Ksp
  BaSO4	105 x Ksp
  SrSO4	20 x Ksp
  CaF	1000 x Ksp
  SiO2	120 ppm

• Highly effective in a wide range of feedwater types and pH ranges.
• Crystal modification property distorts inorganic salt crystal growth, reducing system fouling.
• Compatible with polyelectrolyte coagulants.
• Threshold scale inhibition at low dosage rates allows economical system operation.

Application:

Optimum Vitec® 3000 performance is achieved when the chemical is injected downstream of multimedia filters and upstream of cartridge filters.

Dosing Guidelines:

The typical dosage range is between 2 to 5 ppm. A site-specific dose can be determined using the Avista Advisor computer program. Like any injected chemical, over or underdosing may cause unnecessary membrane system fouling. Please contact the Avista customer service department for customized dosing instructions.

Dilution:

Vitec® 3000 should be diluted with demineralized water or RO permeate. If neither of these water sources is available, softened water may be substituted. The dilution for Vitec® 3000 should not exceed 1% by weight (dilutions below 10% by weight must use DI quality water). This guideline will protect the effectiveness of the internal bacteriostat, which inhibits bacterial growth within the drum and feed tank.

Packaging and Storage:

Standard regional pack sizes are listed below. Custom packaging can be provided worldwide to meet customer needs. Information on drumless or bulk tanker delivery is available on request.

Specifications Appearance: Light amber liquid pH (as supplied): 9.8 — 11.8 Specific Gravity@20°C: 1.25 ± 0.05

Packaging Formats Americas EMEA Pails 45 lbs 23 kg Drums 500 lbs 230 kg IBC's (totebins) 2500 lbs 1100 kg

DRINKING WATER TREATMENT ADDITIVES CLASSIFIED BY NSF INTERNATIONAL TO NSF/ANSI 60 ON SEPTEMBER 2004 AS STANDARD DRINKING WATER TREATMENT CHEMICAL FOR USE IN REVERSE OSMOSIS SYSTEMS AT A MAXIMUM LEVEL OF 7 mg/l.

10/08