Acs Certificate Stainless Steel Pn40 Single Ball Auto Air Release Valve - Triple Function. Triple Function Design: Combines efficiency, durability, and reliability for air release under pressure. High-Quality SS304 Material: Constructed with stainless steel body and top cover for long-lasting performance. Wide Pressure Range: Handles working pressures of PN10, PN16, PN25, and PN40 for various systems. Multiple Certifications: Certified with ISO, WRAS, and ACS for water and sewerage applications. Accurate Float Mechanism: Ensures reliable air release, preventing airlocks and maintaining system performance. Secure Installation: Equipped with A2-70 stainless steel boltings for hassle-free setup. Flexible Sizing: Available in sizes from 1 inch to 2 inches for diverse applications. Full Customization Options: Offers full customization, customization from samples, designs, and minor adjustments.