Colormetry hardness detector prevent water hardness damage to your boiler with miura s colormetry hardness detection system.
Steam boiler water hardness.
Total silica 150 ppm maximum.
A boiler water sample has an unneutralised conductivity of 5 000 μs cm at 25 c.
Non volatile toc total organic carbon oily matter.
An increase in temperature results in an increase in electrical conductivity.
Colloidal substances contamination of boiler water with a colloid in suspension for example.
Hardness hard water does not foam.
Total hardness 1 ppm maximum.
For boiler water the conductivity increases at the rate of approximately 2 of the value at 25 c for every 1 c increase in temperature.
Colloidal particles are less than 0 000 1 mm in diameter and.
The quality of feedwater required is dependent on boiler operating pressure design heat transfer rates and steam use.
A low pressure fire tube boiler can usually tolerate high feed water hardness with proper treatment while virtually all impurities must be removed from water used in some modern high pressure boilers.
General guidelines to prevent corrosion and scaling in low pressure boilers are as follows.
This can be written as.
Total alkalinity 600 ppm maximum.
In order for this reaction to take place it is important to maintain a ph at a minimum value of 9 50.
Most boiler systems have sodium zeolite softened or demineralized makeup water.
Broken down by feed water and boiler water and then by firetube.
This value will limit the silica content of the steam to 0 25 ppm as a function of selective.
Another reason that the loss of hot boiler water is serious is because it increases the humidity in the boiler room and will contribute to the malfunction and failure of electrical controls safety devices and other electrical equipment.
Feed water purity requirements therefore can vary widely.
Water treatment recommendations vary depending on the operating pressure of the boiler the application steam or hot water and other parameters.
However boiler water is deliberately softened to prevent scale formation and this gives it a propensity to foam.
Feed water boiler water characteristics as per is 10392 1982 1 feed water parameters upto 20 kg cm2 21 kg cm2 to 39 kg cm2 40 kg cm2 to 59 kg cm2 unit total hardness 10 1 0 0 5 ppm as caco 3 ph value 8 5 9 5 8 5 9 5 8 5 9 5 dissolved oxygen.
Feedwater hardness usually ranges from 0 01 to 2 0 ppm but even water of this purity does not provide deposit free operation.
Milk causes violent foaming.
Water hardness levels are typically checked manually through the use of chemical reagents but such measurements are time consuming and can result in incorrect readings.
