Kranti, a leading Indian manufacturer of water meters (primarily under the umbrella of Aman Engineering Works and Kranti Group), offers flanged water meters specifically designed for larger pipelines and higher flow rates. Unlike the screwed-end meters used for domestic and smaller commercial applications, flanged meters provide a more robust and secure connection for industrial, agricultural, and main distribution lines. Here's a detailed look at Kranti flanged water meters: 1. Type of Meter: For flanged connections, Kranti predominantly offers Woltman-type water meters. Woltman Type: These meters are designed for measuring bulk flows. They feature a propeller or turbine that is axially mounted in the flow path. The propeller rotates proportionally to the water velocity, and this rotation is transmitted to a sealed register. Removable Mechanism: A key advantage of Woltman meters is that the measuring element (the internal mechanism with the propeller and register) can often be removed from the meter body without disconnecting the entire meter from the pipeline. This simplifies maintenance and calibration. Magnetic Drive: Similar to their screwed meters, Kranti Woltman meters utilize a magnetic drive to transmit the impeller's rotation to the dry dial register, ensuring a hermetically sealed, leak-proof, and fog-free display. Dry Dial: The register remains isolated from the water, enhancing readability and longevity. 2. Flanged End Connection: Sizes: Kranti flanged water meters are available in a wide range of larger sizes, typically starting from 40mm (1.5 inches) and going up to 300mm (12 inches) or even larger (some sources mention up to 1000mm / 40 inches or 900mm for specific models). Flange Standard: The flanges conform to international standards, most commonly IS 1538 (Indian Standard for Cast Iron Flanges) or ASME B16.5 (American Society of Mechanical Engineers) for pressure ratings like Class 150. This ensures compatibility with standard pipelines. Material of Body: For larger flanged meters, the body is typically made of Cast Iron (CI), which is robust and cost-effective for these sizes. They might also offer Stainless Steel (SS 304/316) flanged meters for specific industrial applications requiring higher corrosion resistance, or Brass/Copper Alloy for smaller flanged meters (e.g., 50mm). 3. Key Features and Specifications: Accuracy Class: Kranti flanged water meters are generally Class B as per ISO 4064 and IS 779:1994 (for cold water meters). Some models might meet Class A as well. Robust Construction: The Cast Iron body is often epoxy powder coated for enhanced corrosion protection. Internal components are usually made of corrosion-resistant materials like stainless steel or engineered plastics. Low Pressure Loss: Woltman meters are designed for bulk flow measurement, ensuring minimal pressure drop even at high flow rates. Hermetically Sealed Register: Prevents ingress of water, dust, and condensation, maintaining clear readability over a long service life. Temperature Rating: Cold Water Meters: Typically suitable for water temperatures up to 50°C. Hot Water Meters: Kranti also offers flanged hot water meters designed for temperatures up to 90°C or even 150°C for specialized models, with internal parts made of stainless steel. Maximum Working Pressure: Commonly rated for 10 Bar or 16 Bar. ISI Marked: Most Kranti water meters, including flanged types, carry the ISI mark, indicating compliance with Indian quality standards. Applications: Industrial Water Supply: For factories, manufacturing units, and industrial estates. Commercial Buildings: Large complexes, hotels, hospitals for main intake measurement. Agricultural Irrigation: Measuring water consumption in large-scale farming. Water Distribution Networks: Monitoring bulk water flow in municipal water supply systems. ETP (Effluent Treatment Plants) & STP (Sewage Treatment Plants): Measuring incoming or outgoing wastewater. Fire Protection Systems: For monitoring water flow in large fire mains (though specific fire meters might have additional approvals like UL/FM).