How to use Defoamer King FAG470? What is the recommended dosage?

Before using Defoamer King FAG470, stir gently until uniform. It can be added directly or diluted with water before use. It is recommended to continuously add it to the foam generation area using a metering pump. The specific dosage should be determined through small-scale tests.

Detailed Description

Defoamer King FAG470 is a non-ionic polyether-modified silicone emulsion defoamer with flexible usage methods. First, stir gently before use, as long-term standing may cause slight stratification of the emulsion. Stirring evenly can restore the best state; do not stir vigorously to avoid demulsification. The product can be added directly to the foaming system or used after dilution with several times clean water. The diluted product should be used as soon as possible to avoid microbial growth or decreased emulsion stability.

The best addition method is to continuously add via metering pump to the area with the most intense foam generation (such as the inlet of the aeration tank, liquid surface of the stirring tank, inlet of the spray pipeline, etc.), achieving both instant defoaming and long-term foam suppression with the lowest dosage. For intermittent addition, it is recommended to supplement promptly when foam just appears, rather than waiting until foam accumulates heavily. For high-temperature and strong alkali systems (such as textile scouring and bleaching processes), part of the defoamer can be added preheated to enhance foam suppression capability.

Regarding recommended dosage: There is no fixed recommended dosage value for this product in the database. This is a common industry practice—the precise dosage of defoamer is closely related to various factors such as the medium composition of the foaming system, temperature, shear strength, type and concentration of surfactants, and equipment structure. It is impossible to provide a "one-size-fits-all" standard dosage. In industrial practice, gradient tests usually start from an extremely low concentration to determine the minimum effective dosage as the final usage amount.

Technical Parameters

Application Suggestions

Based on typical application fields of Defoamer King FAG470, the reference experimental dosage range by industry is as follows (the following are common empirical values in the industry, not officially calibrated data from Guoli Chemical, subject to actual on-site tests):

• Water treatment (aeration tank/sedimentation tank): Typically 10 to 100 ppm (i.e., 0.01 to 0.1 kg per ton of water), can be appropriately increased for severe biological foam
• Paint and ink manufacturing: Usually 0.1% to 0.5% of the total formula, add part during grinding stage and supplement the rest during paint mixing stage
• Textile printing and dyeing processing: In high-temperature alkaline baths, reference 0.5 to 2 g/L, can be added along with auxiliaries into the dye bath
• Industrial cleaning: 0.1% to 0.5% of total cleaning solution, continuous metering addition recommended for CIP systems
• Metalworking fluids: 0.05% to 0.5% of circulating cutting fluid, adjust according to foam level
• Pulp and paper: 0.01% to 0.3% relative to pulp or coating system, continuously add at foam-prone points

Precautions

• Diluted emulsion should not be stored for a long time; use within 24 hours to avoid spoilage
• Avoid freezing of the product (recommended storage temperature 5°C to 40°C); freezing may cause irreversible demulsification
• During operation, it is recommended to wear protective gloves and goggles to avoid prolonged direct contact with skin and eyes
• Be sure to conduct small-scale tests before use to determine the optimal dosage and addition point; excessive use may cause system turbidity or cost waste
• Do not mix or add simultaneously with incompatible substances such as strong oxidizers or strong acids
• After opening, use as soon as possible. Seal unused product to prevent moisture evaporation or external contamination