Watts 0856736 Valve

The Watts 0856736 (Series CSM-61-T) is a precision-engineered 1/2 inch NPT balancing valve designed for hydronic system optimization in low-to-medium flow HVAC applications. Built with a rugged bronze body, this ball-type flow measurement valve features an extended throttling range and a large indicator plate to ensure accurate flow measurement even in high-precision low-flow ranges. Its bi-directional design eliminates installation errors by allowing flow in either direction, while the blowout-proof stem provides critical safety under pressurized conditions up to 300 psi at 250°F.

For field technicians, the Watts CSM-61 flow measurement valve includes an integrated positive memory feature, simplifying system balancing by allowing the valve to be closed for service and returned to its exact setpoint without manual recalibration. The compact footprint is specifically tailored for tight piping compartments in fan coil units, water source heat pumps, and reheat coils. This HVAC balancing valve also features checked metering ports with drip caps, two brass pressure taps, and an integral drain port, providing a comprehensive solution for monitoring and controlling differential pressure in commercial piping systems.

• Enhanced System Balancing: The manual positive memory feature allows for rapid setpoint recovery, reducing commissioning time for contractors.
• Versatile Compatibility: Ideal for fan coil units, unit heaters, and domestic hot water lines requiring precise 1/2" NPT connections.
• Safety and Durability: Pressure-tested at 300 psi with a blowout proof stem to prevent leaks and experimental failure under high thermal stress.
• Installation Efficiency: Features a dual-purpose design that provides both flow measurement and positive shutoff, removing the need for additional service valves.

How do I ensure the most accurate flow readings with this valve?
For maximum accuracy, install the Watts 0856736 in a straight pipe run with at least five pipe diameters of clearance upstream and two diameters downstream from any fittings.

Can this valve be used for both hot and chilled water systems?
Yes, the bronze construction and EPDM seats are rated for temperatures ranging from 0°F to 250°F, making it suitable for both heating and cooling hydronic loops.

Does this valve require specialized tools for balancing?
Standard differential pressure gauges connect directly to the dual brass pressure taps, allowing technicians to verify GPM against Watts flow charts without specialized proprietary hardware.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.