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Purified Tannin

Choose the most efficient and simple water treatment program to treat multi-metal, closed loop hydronic systems

Water Quality Standards

 

Known

Standards to preserve the operating efficiency of all Harsco Industrial Patterson-Kelley condensing boilers

New Standard for pH: 8.0 - 9.0

Using TGWT's water treatment program allows you to extend the pH range in your closed loop for a complete protection:

Aluminum (boiler), Mild Steel (piping) & multi-metals

Reference:

R. Gaudreault, M. Dargahi; TGWT Inc.

 

Purified Tannin Products Available

The Product

TG 3304 PM2

Liquid form Purified Tannin
2 gallons per 1,000 gallons (2,000 ppm)
Non Hazardous

B 3304-C-STX

Solid form Purified Tannin
3 stick per 1,000 gallons
Non Hazardous
 

How to Measure Purified Tannin

Simple Color Comparison Test

 

A simple colorimetric test is needed to measure the tannins' residual in a loop

In case of product overfeed, closed loop system will be protected against corrosion as long as the targeted pH range is being followed.

More Accurate Colorimetric Test​

Different test kits suited to your needs are available

To-do By Your Operators

Testing

What:

pH

Conductivity

Residual tannin

When: 

Best practice is once a week

How:

TGWT Harsco PK Closed-Loop Test Kit

Why:

Tannin dosage and pH adjustment have to be performed to meet the targeted range

Log Book

What:

All the values have to be registered in a log book

When: 

Every time you are running some tests

How:

By the operator in charge of the tests

Why:

To keep a record and to make sure the program is under control​

Recirculation

On shut down systems, in summer for example, water re-circulation should be done:

At least 1 hr/day

Why:

To ensure continuous surface protection

 

Water Sampling

Day One Equipment Startup 

Water Samples from:

Water make-up

Each closed loop

Three Months

After the Startup 

Water Samples from:

Each closed loop

 

For highly contaminated systems, monthly analysis are highly advised

Each Year

After the Startup 

Water Samples from:

Each closed loop

Water samples should be sent to TGWT's laboratory.  This will show any significant changes in the water chemistry that could impact boiler’s operating efficiency. The lab report will allow you to correct any fluctuations in the water chemistry

Laboratory

Download the lab Request Form

Send it with your samples to :

 

TGWT

c/o Laboratory
Object: Harsco Industrial P-K analysis


452 Jean-Neveu Street
Longueuil, Quebec
Canada J4G 1N8

lab@tgwt.com

 

Talk to our experts to keep your high heat efficiency in your aluminum condensing boilers