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Ech-328 Eco-Friendly Formula for Compressor Cooling Water. Eco-Friendly Formula: Biodegradable, non-toxic, and free from hazardous discharge. High Concentration: Solid content exceeds 25.0% for efficient water treatment. Patent Protection: Backed by 126 authorized patents including 60 invention patents. Customization Available: Tailored PESA-based blends based on specific water reports. Broad Compatibility: Compatible with common biocides in high-hardness systems. ISO Certified Quality: Certified under ISO9001, ISO45001, and ISO14001 standards. Global Export Experience: Exported to Southeast Asia, Middle East, USA, and other regions. 30+ Years Experience: Over three decades of expertise in water treatment technology.