Automatic Balancing Valves

The "Gold Standard" For Controlling Water Flow In HVAC Systems

Hays' patented Mesurflo® automatic flow control valves have been called the "Gold Standard" because their unique features and benefits make them the ideal solution for controlling flow in waterbased cooling and heating systems. Unlike other control valves which can be noisy and clog easily, Mesurflo® offers you these significant benefits:

• Eliminates oscillation, vibration, noise and feedback in the system

• Non-clogging design that can be backwashed for easy cleaning

• Maintains proper flow rate for high efficiency of the coil

• Reduces the number of valves required to balance the system

• Eliminates the high cost of testing and balancing

• Additional devices may be added without affecting the system balance

• Accuracy provides 99.8% heat transfer

Mesurflo® automatic flow control valves are now available with flow rates up to 9.00 GPM in the small brass body designs. Previously all 9.00 GPM applications required the use of the large brass body designs such as models 2520 and 2524. Now, nearly 90% of 9.00 GPM applications can utilize the small brass body valves, models 2510, 2514, 2516, 2519 and 2517. This is approximately a 50% reduction in brass for 9.0 GPM applications, resulting in substantial cost savings to you.

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Model 2510 Mesurflo® Automatic Balancing Valves
Standard Features:
- FNPT and MNPT Inlet / Outlet Connections
- Changeable GPM Flow Cartridges
- Differential Operating Pressure:2-80 PSID 0.50-5.00 GPM, 3-80 PSID 5.50-9.00 GPM
- ± 10% Accuracy
- Operating Temperature Range 32ºF to 225ºF
- 1/4" Pressure / Temperature Ports
- Dryseal Pipe Threads
- Valve Body Suitable for 600 PSIG
- Valves Labeled with Model No., Size & Flow Rate
Model 2511 Mesurflo® Automatic Balancing Valves
Standard Features:
- FSWT Inlet / Outlet Connections
- Differential Operating Pressure: 2-80 PSID 0.50-5.00 GPM, 3-80 PSID 5.50-9.00 GPM
- ± 10% Accuracy
- Operating Temperature Range 32ºF to225ºF
- Available in 4" or 5-1/2" Lengths
- Valve Body Suitable for 522 PSIG
- Valves Labeled with Model No., Size & Flow Rate
Model 2513 Mesurflo® Automatic Balancing Valves
Standard Features:
- 1/2", 3/4" & 1" FSWT Inlet / Outlet Connections
- 3/4" Female & Male Garden Hose Inlet / Outlet Connections
- 1/2" & 3/4" FNPT & MNPT Inlet / Outlet Connections
- Changeable GPM Flow Cartridges
- Differential Operating Pressure: 2-80 PSID 0.50-5.00 GPM, 3-80 PSID 5.50-9.00 GPM
- ± 10% Accuracy
- Operating Temperature Range 32ºF to 225ºF
- Dryseal Pipe Threads
- Valves Labeled with Model No., Size & Flow Rate
- Valve Body Suitable for 600 PSIG
Model 2514 Mesurflo® Y-Ball Automatic Balancing Valves
Standard Features:
- FNPT, FSWT and MNPT Outlet / Inlet Connections
- Changeable GPM Flow Cartridges
- Differential Operating Pressure: 2-80 PSID 0.50-5.00 GPM, 3-80 PSID 5.50-9.00 GPM
- ± 10% Accuracy
- Operating Temperature Range 32ºF to 225ºF
- 1/4" Pressure / Temperature Ports
- Short or Lever Handle
- Right or Left Hand Porting
- Inlet and Outlet Port Options
- Valves Labeled with Model No., Size & Flow Rate
- Dryseal Pipe Threads
- Valve Body Suitable for 600 PSIG
Model 2515 Mesurflo® Y-Ball Automatic Balancing Valves
Standard Features:
- FNPT, FSWT and MNPT Outlet / Inlet Connections
- Changeable GPM Flow Cartridges
- Differential Operating Pressure: 2-80 PSID 0.50-5.00 GPM, 3-80 PSID 5.50-9.00 GPM
- ± 10% Accuracy
- Operating Temperature Range 32ºF to 225ºF
- 1/4" Pressure / Temperature Ports
- Short or Lever Handle
- Inlet and Outlet Port Options
- Valves Labeled with Model No., Size & Flow Rate
- Dryseal Pipe Threads
- Valve Body Suitable for 600 PSIG
Model 2516 Mesurflo® Y-Ball Automatic Balancing Valves
Standard Features:
- FNPT, FSWT and MNPT Outlet / Inlet Connections
- Changeable GPM Flow Cartridges
- Differential Operating Pressure: 2-80 PSID 0.50-5.00 GPM, 3-80 PSID 5.50-9.00 GPM
- ± 10% Accuracy
- Operating Temperature Range 32ºF to 225ºF
- 1/4" Pressure / Temperature Ports
- Short or Lever Handle
- Inlet and Outlet Port Options
- Valves Labeled with Model No., Size & Flow Rate
- Dryseal Pipe Threads
- Valve Body Suitable for 600 PSIG
Model 2517 Mesurflo® Y-Body Automatic Balancing Valves
Standard Features:
- FSWT Outlet / Inlet Connections
- Changeable GPM Flow Cartridges
- Differential Operating Pressure: 2-80 PSID 0.50-5.00 GPM, 3-80 PSID 5.50-9.00 GPM
- ± 10% Accuracy
- Operating Temperature Range 32ºF to 225ºF
- Valves Labeled with Model No., Size & Flow Rate
- Valve Body Suitable for 600 PSIG
- Available in Lead Free Version (NSF/ANSI 61, 372 Certified) for Domestic Hot Water Applications - Consult Factory
Model 2519 Mesurflo® Y-Ball Automatic Balancing Valves
Standard Features:
- FNPT, FSWT and MNPT Outlet / Inlet Connections
- Changeable GPM Flow Cartridges
- Differential Operating Pressure: 2-80 PSID 0.50-3.00 GPM, 4-80 PSID 3.50-5.00 GPM
- ± 10% Accuracy
- Operating Temperature Range 32ºF to 225ºF
- 1/4" Pressure / Temperature Ports
- Inlet and Outlet Port Options
- Short Handle
- Valves Labeled with Model No., Size & Flow Rate
- Dryseal Pipe Threads
- Weighs between 1.2 - 1.5 lbs.
- Suitable for 600 PSIG
Model 2520 Mesurflo® Automatic Balancing Valves
Standard Features:
- FNPT and MNPT Inlet Connections
- FNPT, FSWT and MNPT Outlet Connections
- Changeable GPM Flow Cartridges
- Differential Operating Pressure: 2-80 PSID Range 0.50 - 5.00 GPM, 3-80 PSID Range 5.50 - 17.0 GPM, 5-80 PSID Range 18.0 - 25.0 GPM
- ± 10% Accuracy
- Operating Temperature Range 32º F to 225º F
- 1/4" Pressure / Temperature Ports
- Valves Labeled with Model No., Size & Flow Rate
- Dryseal Pipe Threads
- Valve Body Suitable for 600 PSIG
Model 2521 Mesurflo® Automatic Balancing Valves
Standard Features:
- FSWT Inlet / Outlet Connections
- Differential Operating Pressure:3-80 PSID 9.0-17.0 GPM, 5-80 PSID 18.0-25.0 GPM
- ± 10% Accuracy
- Operating Temperature Range 32ºF to225ºF
- Valves Labeled with Model No., Size & Flow Rate
- Valve Body Suitable for 522 PSIG
Model 2524 Mesurflo® Y-Ball Automatic Balancing Valves
Standard Features:
- FNPT, FSWT and MNPT Outlet / Inlet Connections
- Changeable GPM Flow Cartridges
- Differential Operating Pressure: 2-80 PSID 0.5-5.00 GPM, 3-80 PSID 5.50-17.0 GPM, 5-80 PSID 18.0-25.0 GPM
- ± 10% Accuracy
- Operating Temperature Range 32ºF to 225ºF
- 1/4" Pressure / Temperature Ports
- Short or Lever Handle
- Right or Left Hand Porting
- Inlet and Outlet Port Options
- Valves Labeled with Model No., Size & Flow Rate
- Dryseal Pipe Threads
- Valve Body Suitable for 600 PSIG
Model 2528 Mesurflo® Y-Ball Automatic Balancing Valve (Use w/Pop-Top Actuator)
Standard Features:
- FNPT, FSWT, MSWT and MNPT Outlet / Inlet Connections
- Changeable GPM Flow Cartridges
- Differential Operating Pressure: At low differential pressure the flow area required to achieve higher flow exceeds the flow area available for the respective Series. Therefore, the minimum pressure differential requirement is increased for the higher flow ranges of some series Mesurflo valves.
- ± 10% Accuracy
- Operating Temperature Range 32ºF to 225ºF
- 1/4" Pressure / Temperature Ports
- Valves Labeled with Model No., Size & Flow Rate
- Inlet and Outlet Port Options
- Dryseal Pipe Threads
- Weighs between 1.2 - 1.5 lbs. without the actuator (Refer to Components Section for specifications on ATC6, ATC7, and ATC8.)
- Valve Body Suitable for 600 PSIG
- Cycle Life of Ball Valve Greater than 100,000 Full Cycles
- Torque Less Than 10 in. lbs.@300 PSID
- Equal Percentage Characterized Disc Included
Model 2530 Mesurflo® Automatic Balancing Valves
Standard Features:
- FNPT Inlet/Outlet Connections
- 1 GPM Increments
- Changeable GPM Flow Cartridges
- Differential Operating Pressure: 3-80 PSID 9.0-17.0 GPM, 5-80 PSID 18.0-75.0 GPM
- ± 10% Accuracy
- Operating Temperature Range 32ºF to 225ºF
- 1/4" Pressure / Temperature Ports
- Valves Labeled with Model No., Size & Flow Rate
- Dryseal Pipe Threads
- Valve Body Suitable for 400 PSIG
Model 2535 Mesurflo® Automatic Balancing Valve (2 in. & 2-1/2 in.)
Standard Features:
- FNPT Inlet/Outlet Connections
- 1 GPM Increments
- Changeable GPM Flow Cartridges
- Differential Operating Pressure: 3-80 PSID 9.0-17.0 GPM, 5-80 PSID 18.0-100.0 GPM
- ± 10% Accuracy
- Operating Temperature Range 32ºF to 225ºF
- 1/4" Pressure / Temperature Ports
- Valves Labeled with Model No., Size & Flow Rate
- Dryseal Pipe Threads
- Valve Body Suitable for 400 PSIG
Model 2540 Mesurflo® Automatic Balancing Valve (2 in., 2-1/2 in. & 3 in.)
Standard Features:
- FNPT Inlet/Outlet Connections
- 5 GPM Increments
- Changeable GPM Flow Cartridges
- Sizes 2" (40-100 GPM), 2-1/2" (60-150 GPM), 3" (90-200 GPM)
- Differential Operating Pressure: 5-80 PSID 40-200 GPM
- ± 10% Accuracy
- Operating Temperature Range 32ºF to 225ºF
- 1/4" Pressure / Temperature Ports
- Valves Labeled with Model No., Size & Flow Rate
- Dryseal Pipe Threads
- Valve Body Suitable for 400 PSIG
Model 2545 Mesurflo® Automatic Balancing Valve (2 in., 2-1/2 in., 3 in. & 4 in.)
Standard Features:
- Flanged Inlet/Outlet Connections
- 1 gpm Increments 40-100 gpm
- 5 gpm Increments 105-225 gpm
- Flow Cartridges are Not Changeable
- Valve is Hermetically Sealed
- Differential Operating Pressure: 5-80 PSID
- ± 10% Accuracy
- Operating Temperature Range 32ºF to 225ºF
- 1/4" Pressure / Temperature Ports
- Working Pressure Rating per ASME Class 150 (Valve Body Suitable for 200 PSIG)
- Consult Factory for ASME Class 300 Flange Requirements (Valve Body Suitable for 400 PSIG)
Model 2546 - Welded Mesurflo® Automatic Balancing Valve (6 in., 8 in. & 10 in.)
Standard Features:
- Welded Connections
- 25 GPM Increments
- Differential Operating Pressure: 5-80 PSID
- ± 10% Accuracy
- Operating Temperature Range 32ºF to 225ºF
- 1/4" Pressure / Temperature Ports
- Valves Labeled with Model No., Size & Flow Rate
- Working Pressure Rating per ASME Class 150 (Valve Body Suitable for 200 PSIG)
- Consult Factory for ASME Class 300 Flange Requirements (Valve Body Suitable for 400 PSIG)
- Length changes as flow rates are increased
- Hooks attached for ease of handling for installation placement
Model 2547 - Flanged Mesurflo® Automatic Balancing Valve (6 in., 8 in. & 10 in.)
Standard Features:
- Flanged Connections
- 25 GPM Increments
- Differential Operating Pressure: 5-80 PSID
- ± 10% Accuracy
- Operating Temperature Range 32ºF to 225ºF
- 1/4" Pressure / Temperature Ports
- Valves Labeled with Model No., Size & Flow Rate
- Working Pressure Rating per ASME Class 150 (Valve Body Suitable for 200 PSIG)
- Consult Factory for ASME Class 300 Flange Requirements (Valve Body Suitable for 400 PSIG)
- Length changes as flow rates are increased
- Hooks attached for ease of handling for installation placement
Model 2548 - Grooved Mesurflo® Automatic Balancing Valve (6 in., 8 in. & 10 in.)
Standard Features:
- Welded Connections
- 25 GPM Increments
- Differential Operating Pressure: 5-80 PSID
- ± 10% Accuracy
- Operating Temperature Range 32ºF to 225ºF
- 1/4" Pressure / Temperature Ports
- Valves Labeled with Model No., Size & Flow Rate
- Working Pressure Rating per ASME Class 150 (Valve Body Suitable for 200 PSIG)
- Consult Factory for ASME Class 300 (Valve Body Suitable for 400 PSIG)
- Length changes as flow rates are increased
- Hooks attached for ease of handling for installation placement
Model 2570 Mesurflo® Automatic Balancing Valve (12 in., 14 in., 16 in., 18 in., 20 in., 24 in., 30 in. & 36 in.)
Standard Features:
- Flanged Outlet Connections
- 25 GPM Increments
- Differential Operating Pressure: 5-80 PSID (Where Not Limited By Application)
- ± 10% Accuracy
- Operating Temperature Range 32º to 225ºF
- 1/8" Extended Pressure / Temperature Ports
- Valves Labeled with Model No., Size & Flow Rate
- Working Pressure Rating per ASME Class 150 (Valve Body Suitable for 200 PSIG)
- Consult Factory for ASME Class 300 Flange Requirements (Valve Body Suitable for 400 PSIG)

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