The Watts CSM-82-F 4 is a 4" manual circuit balancing valve with Flanged connections. It features a ductile iron body and a epdm seat.
This 4 inch CSM-82-F static balancing valve is designed for application on medium to high volume flow rate HVAC units. The angled globe design allows for precise control of flow for effective system balancing. The unique cylindrical plug design provides full flow with minimal pressure drops and low operating torque. Ergonomically friendly handwheel makes setting or closing the valve simple. This valve features durable ductile iron body construction and easily accessible pressure monitoring ports with drip caps to facilitate system balancing and flow measurement. These valves also provide positive shut-off, eliminating the need for a separate service valve.
Features
- Accurate flow measurement
- Durable ductile iron body construction
- ANSI Class 150 flanged end connections
- Globe style shutoff for reliable isolation
- Low torque cylindrical plug design
- Handwheel shutoff
Common Questions
- Do I need a separate meter to read the flow?
- Yes. The CSM-82-F 4 is a differential-pressure device: it meters through dual PT (pressure/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 4" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.
- Can it also shut off the circuit?
- Yes. The CSM-82-F 4 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.
- Can I use it on a domestic hot water recirculation line?
- No. The CSM-82-F 4 is not a lead-free model, so it is restricted to closed hydronic heating and chilled-water loops and other non-potable service. For DHW recirculation balancing, choose the lead-free equivalent — the Watts LFCSM-61-S (PT-port) or LFiDROSET CSD (direct-reading).
Specifications
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Type: Balancing
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Size: 4"
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Inlet Size: 4"
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Outlet Size: 4"
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Connection: Flanged
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Body Material: Ductile Iron
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Seat / Seal Material: EPDM
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Pressure Class: Class 150
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Application: Hydronic Heating/Cooling
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Pack Quantity: 8
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Country of Origin: China
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Warranty: 1 Year Limited
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MPN: CSM-82-F 4
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Certifications: ASSE-6510, ASSE-536
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Lead-Free: No
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Balancing Type: Manual Circuit Balancing
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Valve Functions: Balancing;Flow Measurement;Shutoff
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Flow Readout: Dual PT ports, 1/4" SAE 45° flare, checked w/ drip caps
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Memory Stop: Yes
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Positive Shutoff: Yes
