balancing & flow measurement valves

w a t t s . c o m

Balancing & Flow Measurement Valves

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Table of ContentsGeneral Information ................................................................................................................................ 2 – 3

Series CSM-61 –– Flow Measurement Valves for Low to Medium Flow Rate HVAC Units ........................ 4 – 5

Series CSM-81-F –– Flow Measurement Valves for Medium to High Flow Rate HVAC Units .......................... 7

Series CSM-91 –– Flow Measurement Valves for Medium to High Flow Rate HVAC Units ....................... 8 – 9

Series TDV –– Triple Duty Valves for Single, Double and Vertical In-Line Pump Applications ................. 10 – 11

CSM-91-IK –– Insulation kits for Series CSM-91 and TDV to Meet ASHRAE 90.1 Specifications .................. 12

Series PG –– Pressure Differential Gauges .................................................................................................... 12

Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

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General InformationImportance of a Balanced SystemHeating, cooling and water distribution systems must be accurately adjusted and balanced to achieve optimum system performance. Unbalanced systems can produce wide temperature variations among rooms and can raise building energy costs. The installation of balancing valves in combination with pre-determined accurate pressure drop calculations provides indoor comfort and energy efficiency to the end user.

Accurately balanced systems provide the following benefits:• A comfortable indoor climate• Desired flow distribution throughout the building• Substantial energy and cost savings• Trouble-free operation and ease of maintenance

Role of Balancing ValvesThe role of the balancing valve is to control the gallon per minute (gpm) flow rate in each building main, riser and branch to deliver the designed gpm flow in chilled and/or hot water applications. At each heat transfer coil the balancing valve is set to provide the precise flow rate specified by the design engineer to provide indoor comfort and energy efficiency within a building.

Figure 1 shows a typical hydronic system and illustrates the locations where balancing valves are usually installed.

The example below describes how Watts balancing valves would be applied to a system like that shown in Figure 1.

In Figure 1, Riser B has 12 coils that each require a 2 gpm flow rate to meet design requirements. The total design flow rate is (12 coils x 2 gpm) or 24 gpm per riser. Balancing valves will be applied on the main supply line, the coil return, the branch return and the riser return as follows:• A Series CSM-91 shall be applied on the main supply line to control the flow rate to 48 gpm. (2 risers per header at 24gpm per riser)• A Series CSM-81-F shall be applied on each riser return line to control the flow rate to 24 gpm (4 branches per riser at

6 gpm per branch).• A Series CSM-61 shall be applied on each branch return line to control the flow rate to 6 gpm (3 coils at 2 gpm per branch).• A Series CSM-61 shall be applied on each coil return line to control the flow rate through the coil to 2 gpm.

Each return riser flows into the return header sending 24 gpm to the boiler or chiller.Figure 2 is a typical heat transfer coil used in chilled or hot water hydronic systems. This illustration shows the products commonly

Figure 1

WattsFV-4/Duovent

Air Vent

WattsSeries TPTest Plug

WattsSeries TP Test Plug

andSeries DPG1 Pressure Gauge

WattsB-6081 or FBVS-3C Ball Valve

WattsS777S or S777SI

Strainer with Blow Down

Coil

WattsSeries TP Test Plug

Watts Series TP Test Plug

WattsCSM 61

WattsB-6081 or FBVS-3C Ball ValveTCV

Two-Way Heating and Cooling Coils

3

Figure 2

installed on the coil including an air vent, test plugs, a balancing valve, ball valves, a strainer and a gauge. Installations will vary due to specification preference.

Series CSM-61Flow Measurement ValvesSizes: 1⁄2" – 3" (15 – 80mm)Series CSM-61 Flow Measurement Valves are designed for ap-plication on low or medium flow rate HVAC units. Their compact size allows for easy installation and use in crowded piping compartments. The CSM-61’s ball-type design, extended throttling range, and large indicator plate, make for highly accurate flow measurement, even in very low flow ranges. The CSM-61’s positive memory feature is easy to see, access, and operate, facilitating system balancing and flow measurement. These valves are also bi-directional, so there is no chance of installing the valve in the incorrect flow direction.Series CSM-61 valves provide positive shutoff, eliminating the need for a separate service valve. The solder style CSM’s may be installed without disassembly, saving costly installation time. These valves are also provided with blowout proof stems. Use, misuse, corrosion, or wear will not allow the stem to “blowout," releasing pressurized hot or chilled water.

Features• Accurate flow measurement

• Easy to use memory

• Bi-directional flow

• Positive shutoff

• Safe “blowout" proof design

• Available with threaded and soldered end connections

• Integral drain port

SpecificationsA flow measurement valve shall be installed on each hot/chilled water unit or as otherwise shown on plans. The valve shall be of the bi-directional, blow-out resistant, tight shutoff, ball design, with position indicator, memory device, checked metering ports with drip caps and integral drain ports opposite the metering ports type. The valve shall be a Watts Regulator Company Series CSM-61.

Applications• Fan coil units

• Water source heat pumps

• Reheat coils

• Panel coils

• Small branch lines

• Unit heaters

• Unit ventilators

• Finned radiation

• Small domestic hot water lines

• Convectors

• Small pumps

Fan Coil Unit

Series CSM-61Fan Coil Unit

Series C

SM

-61

Pump, Riser, and Branches

Installations

Series C

SM

-61

Series C

SM

-61

Series C

SM

-61

4

Soldered

Threaded

5

Model Size (DN) Dimensions (approx.) Weight A C D R in. mm in. mm in. mm in. mm in. mm lbs. kgs. CSM-61-M1-S 1⁄2 15 211⁄16 68 15⁄8 41 1⁄2 13 13⁄4 45 1.0 0.45 CSM-61-M1-S 3⁄4 20 31⁄8 79 111⁄16 43 9⁄16 15 17⁄8 47 1.3 0.59 CSM-61-M1-S 1 25 313⁄16 97 17⁄8 47 13⁄16 20 21⁄16 52 1.8 0.82 CSM-61-M2-S 11⁄4 32 49⁄16 116 17⁄8 47 11⁄8 29 23⁄16 56 1.5 0.68 CSM-61-M2-S 11⁄2 40 47⁄8 123 2 50 15⁄16 33 25⁄16 59 1.9 0.86 CSM-61-M2-S 2 50 6 153 29⁄16 66 19⁄16 40 25⁄8 67 3.4 1.54 CSM-61-M1-T 1⁄2 15 23⁄8 60 15⁄8 41 1⁄2 13 13⁄4 45 1.0 0.45 CSM-61-M1-T 3⁄4 20 25⁄8 67 111⁄16 43 9⁄16 15 17⁄8 47 1.3 0.59 CSM-61-M1-T 1 25 31⁄8 80 17⁄8 47 13⁄16 20 21⁄16 52 1.9 0.86 CSM-61-M1-T 11⁄4 32 33⁄4 94 17⁄8 47 1 25 23⁄16 56 1.9 0.86 CSM-61-M1-T 11⁄2 40 315⁄16 100 2 50 11⁄16 27 25⁄16 59 2.3 1.04 CSM-61-M1-T 2 50 41⁄2 114 29⁄16 66 15⁄16 33 29⁄16 66 4.0 1.81 CSM-61-M1-T 21⁄2 65 61⁄2 165 41⁄8 104 23⁄16 55 31⁄8 80 13.0 5.90 CSM-61-M1-T 3 80 613⁄16 173 43⁄8 112 27⁄8 73 35⁄8 92 17.0 7.71

Suffix: S = Solder Ends, T = Threaded Ends

Dimensions-Weights

Pressure-Temperature Pattern Size Working Temp Max. Working Pres. °F °C psi bar Solder 1⁄2" – 1" (15 – 25mm) 200* 93 100 7 250 ** 121 200 14 11⁄4" – 2" (32 – 50mm) 200* 93 90 6 250 ** 121 175 12 Thread 1⁄2" – 3" (15 – 80mm) 250 121 300 21 *Note 1: Solder used in joints: 50-50 Tin Lead (ASTM B32 Alloy Grade 50A)**Note 2: Solder used in joints: 95-5 Tin Antimony

C

D

A R

Materials of ConstructionHousing/Body Bronze

Packing Material 1⁄2" – 2" (15 – 50mm) Viton® 21⁄2" – 3" (65 – 80mm) Neoprene

Pressure Taps 1⁄4" Brass SAE 45° Flare

Seats 1⁄2" – 1", 3" (15 – 25, 80mm) Carbon/Glass filled PTFE 11⁄4" – 2" (32–50mm) Virgin PTFE.

Drain Plug Brass

For additional information, request literature ES-CSM-61.

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Series CSM-81-FFlow Measurement ValvesSizes: 21⁄2" – 8" (65 – 200mm)Series CSM-81-F Flow Measurement Valves are designed for application on medium to high volume flow rate HVAC units. The CSM-81-F’s lubricated plug design, extended throttling range and large indicator plate provide accurate flow measurement and long service life.CSM-81-F’s unique cylindrical plug design provides full flow with minimal pressure drops and low operating torque. Large wrench flats on the external plug surface make setting or closing the valve simple.Series CSM-81-F valves feature easily accessible checked me-tering ports with drip caps to facilitate system balancing and flow measurement. These valves also provide positive shutoff, eliminating the need for a separate service valve.

Features• Accurate flow measurement

• Flanged end connections


• Checked metering ports

• Low torque

• Face to face dimensions to ANSI B16.10

SpecificationsA flow measurement valve shall be installed on each hot/chilled water unit or as otherwise shown on the plans. The valve shall be of flanged end connections, provide positive shutoff, low torque cylindrical plug design, with position indicator plate and checked metering ports. The valve shall be a Watts Regulator Company Series CSM-81-F.

Applications• Fan coil units

• Water source heat pumps

• Reheat coils

• Panel coils

• Branch lines

• Pumps

Typical Installations

Fan Coil Unit

Series CSM-81-FFan Coil Unit

Series C

SM

-81-F

Pump, Riser, and Branches

Series C

SM

-81-F

Series C

SM

-81-F

Series C

SM

-81-F

7

Model Size (DN) Dimensions (approx.) Weight A C D E F G in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs. CSM-81-F 21⁄2 65 71⁄2 191 51⁄8 130 315⁄16 99 7 178 11⁄16 17 21⁄2 64 29.5 13.38 CSM-81-F 3 80 8 203 51⁄16 137 43⁄16 106 71⁄2 191 3⁄4 19 21⁄2 64 39.0 17.69 CSM-81-F 4 100 9 229 61⁄2 165 415⁄16 124 9 229 15⁄16 24 21⁄2 64 61.5 27.89 CSM-81-F 5 125 101⁄2 267 73⁄4 197 6 153 10 254 1 25 35⁄8 92 88.0 39.91 CSM-81-F 6 150 101⁄2 267 73⁄4 197 6 153 11 279 1 25 35⁄8 92 100.0 45.35 CSM-81-F 8 200 111⁄2 292 93⁄16 233 61⁄2 165 131⁄2 343 11⁄8 28 35⁄8 92 172.0 78.00

Suffix: F = Flanged Ends.

Dimensions-Weights

Materials of ConstructionBody ASTM-A-126 Class B semi-steelPlug ASTM-A-126 Class B semi-steelStem Seal PTFEPressure Taps Brass 1⁄4" SAE 45° Flare


Flange hole di men sions conform to ANSI B16.1

Class 125.

A

E

F

D

C

G

Pressure-TemperatureMaximum Working Temperature: 250˚F (121˚C)Maximum Working Pressure: 175psi (12 bar)

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Hot/Chilled Water Coil


= CSM-91

Series CSM-91Flow Measurement/Balancing ValvesSizes 21⁄2" – 12" (65 – 300mm) Series CSM-91 Flow Measurement/Balancing Valves are designed for application on medium or large flow rate HVAC systems, pump packages, and cooling towers. They feature a multi-turn adjustment range for maximum control, pressure differential readout ports on both sides of the valve to allow for easier installation and positive shutoff for servicing equipment. In addition, these valves also incorporate a micrometer type hand-wheel adjustment, visually readable settings and a tamper-proof memory stop.The CSM-91’s field-convertible design allows the valve to be changed from the factory-standard straight pattern to an optional angle pattern with standard tools and no additional parts. This al-lows the valve to be used as a replacement for angles or elbows, and will not affect the valve’s accuracy. Maximum flow requires a one-foot pressure drop across the valve to obtain an accurate meter reading with the valve set point from 50% to 100% open for greatest accuracy. The valve should be installed with flow in the direction of the arrow on the valve body, and installed at least five pipe diameters down-stream from any fitting, and at least ten pipe diameters down-stream from any pump. Two pipe diameters downstream from the CSM-91 should be free of any fittings. When installed, easy and unobstructed access to the valve handwheel and metering ports for adjustment should be provided. Mounting of the valve in piping must prevent sediment buildup in metering ports.

Features• Multi-turn adjustment

• Interchangeable metering and drain ports on both sides of valve


• Tamper-proof memory stop

• Micrometer type handwheel adjustment - visually readable from a distance

• Field convertible for straight or angle pattern

• Grooved end connections with optional flange adapters

SpecificationsA flow measurement valve shall be installed as shown on plans. Each valve shall have two 1⁄4" (6mm) NPT brass metering ports with Nordel® check valves and gasketted caps located on both sides of valve seat. Two additional 1⁄4" (6mm) NPT connections with brass plugs are to be provided on the opposite side of the metering ports for use as drain connections. Drain connections and metering ports are to be interchangeable for measurement flexibility when valves are installed in tight locations. The valve body shall be ductile iron with industrial standard grooved ends. Valve stem and plug disc shall be bronze with ergonomically designed handwheel with multi-turn handwheel adjustments. Sizes 21⁄2" and 3" (65 and 80mm) - five turns, 4" – 6" (100 – 150mm) - six turns, 8" and 10" (200 and 250mm) - twelve turns, and 12" (300mm) - fourteen turns. Flange adapters shall be supplied to prevent rotation. The valve shall be a Watts Regu-lator Company Series CSM-91.

Angle Pattern

Straight Pat tern

Applications• Hot/Chilled water coils

• Cooling tower & chiller connections

• Primary & secondary connections

Pump

Primary Mains

Secondary Pump Circuit

Cooling Tower & Chiller Con nec tions

Primary & Secondary Con nec tions

Cooling Tower

Cooling Tower

PumpCon dens ers

Fan Coil Unit

Fan Coil Unit

9

Angle Pattern (Con vert ible)

t

Straight Pattern (Stan dard)

Spac er

FlangeDia.

Straight Pattern

Size (DN) Dimensions (approx.) Flange Dia. Spacer Weight A C D F 125# in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs kgs 21⁄2 65 12 305 95⁄8 245 23⁄4 70 29⁄16 65 7 178 1 25 19 9 3 80 12 305 101⁄2 267 27⁄16 62 3 76 71⁄2 191 1 25 24 11 4 100 14 356 109⁄16 268 3 76 37⁄16 87 91⁄4 235 11⁄4 32 42 19 5 125 171⁄2 445 131⁄16 332 35⁄8 92 415⁄16 125 10 254 11⁄4 32 81 37 6 150 2011⁄16 525 133⁄4 349 47⁄16 113 57⁄8 149 11 279 2 51 120 54 8 200 283⁄16 716 245⁄8 625 511⁄16 144 77⁄8 200 131⁄2 343 21⁄4 57 310 141 10 250 30 762 261⁄2 673 69⁄16 167 915⁄32 241 16 406 21⁄4 57 460 209 12 300 381⁄16 964 287⁄16 722 75⁄8 194 125⁄8 321 19 483 21⁄4 57 870 395

Spac er Flange Dia.

D

Angle Pattern (Field Convertible*)

Size (DN) Dimensions (approx.) Flange Dia. Spacer Weight A C D E F1 F2 125# in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs kgs 21⁄2 65 101⁄8 257 95⁄8 245 45⁄8 117 73⁄8 187 29⁄16 65 23⁄4 70 7 178 1 25 19 9 3 80 1013⁄16 275 101⁄2 267 37⁄8 98 83⁄8 213 3 76 27⁄16 62 71⁄2 191 1 25 24 11 4 100 125⁄8 321 109⁄16 268 43⁄8 111 95⁄8 244 37⁄16 87 3 76 91⁄4 235 11⁄4 32 42 19 5 125 155⁄8 397 131⁄16 332 51⁄2 140 12 305 415⁄16 125 35⁄8 92 10 254 11⁄4 32 81 37 6 150 189⁄16 471 133⁄4 349 65⁄8 168 141⁄8 359 57⁄8 149 47⁄16 113 11 279 2 51 120 54 8 200 245⁄16 618 245⁄8 625 93⁄16 233 1815⁄16 481 77⁄8 200 511⁄16 144 131⁄2 343 21⁄4 57 310 141 10 250 267⁄8 683 261⁄2 673 93⁄4 248 205⁄16 516 915⁄32 241 69⁄16 167 16 406 21⁄4 57 460 209 12 300 3111⁄16 805 287⁄16 722 14 356 241⁄16 611 125⁄8 321 75⁄8 194 19 483 21⁄4 57 870 395*Note: Series CSM-91 valves are shipped as straight pattern from fac to ry. To convert to angle pattern refer to instruction sheet shipped with valve.

Pressure-TemperatureGrooved Ends Only

Maximum Working Pressure: 375psi (26.25 bar)

Maximum Temperature: 230°F (110°C)

Flange

Maximum Working Pressure:

Class 125: 175psi (12 bar)


Materials of ConstructionBody Ductile Iron ASTM A536 GR65-45-12Disc Bronze ASTM B584 C-84400Seat 21⁄2" – 6" (65 – 150mm) Engineered Resin

8" – 12" (200 – 300mm) EPDM Stem 21⁄2" – 6" (65 – 150mm) Brass ASTM B-16,

8" – 12" (200 – 300mm) Stainless Steel O-ring Buna-NMemory Lock Brass ASTM B-16Meter Ports NPT Brass Body with Schrader ValveDrain Tappings (2) 1/4" Brass plugNote: Series CSM-91 valves are shipped with grooved ends stan dard. For com-pan ion flang es, please specify size when or der ing. In su la tion blocks are also or dered sep a rate ly from valve. Please spec i fy size when or der ing.

Dimensions-Weights

A

C

F F2 EA

D

C

F1


10

Base Mounted Single Suction Pump


Base Mounted Double Suction Pump

Vertical In-line Pump

Series TDVTriple Duty ValvesSizes: 21⁄2" – 12" (65 – 300mm)Series TDV Triple Duty Valves are designed for use on single, double, and vertical in-line pump applications. The TDV com-bines the functions of a positive hand-tight shutoff valve, check valve, and flow control valve into one versatile package, and eliminates the need to utilize three separate valves on the pump system. By using the Series TDV, fewer components and fewer connections are required. Therefore, installation time is reduced, less space is needed, and the potential for leaks is reduced: adding up to significant cost savings. The field-convertible design allows the TDV to be changed from the factory-standard, straight pattern to an optional angle pattern by using standard tools, and no additional parts. This allows the TDV to be used as a replacement for angles and elbows, and generates even greater savings on space and connections. The TDV is also designed for easy field serviceability with bonnet O-rings that can be replaced under pressure by backseating the valve, and seats that can be changed without the use of special tools.

Features• Reduced field installation and material cost

• Eliminates requirement of three valves on pump discharge

• Soft seat to ensure tight shutoff

• Spring closure design, non-slam silent check valve feature

• Valve Cv designed to ASHRAE flow recommendations for quiet system operation

• Grooved end connections with optional flange adapters

SpecificationsA triple duty valve shall be installed on the discharge side of each pump as indicated on the plans. The valve body shall be ductile iron with grooved ends and anti-rotation lugs on the inlet and outlet of the body. The valve shall have two 1⁄4" (6mm) NPT connections on each side of the valve seat. Two connections to have brass pressure metering ports with check valve and gasket-ted caps. Two other connections to be supplied with brass drain plugs. Metering ports are to be inter-changeable with brass drain plugs. The valve disc shall be bronze plug type with engineered resin seat 21⁄2" – 6" (65 – 150mm) and EPDM for 8" – 12" (200 – 300mm).Valve stem shall be stainless steel with wrench flats. Flange adapters, where necessary, shall be Class 125) ductile iron flanges with anti-rotation lugs and EPDM gaskets. Valve shall be a Watts Regulator Company Series TDV.

Applications• Single, double and vertical in-line pumps

Angle Pattern

Straight Pattern

11

Dimensions-Weights

Straight Pattern

Size (DN) Dimensions (approx.) Flange dia. Spacer Weight A C D F 125# in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs 21⁄2 65 12 305 7 178 23⁄4 70 29⁄16 65 7 178 1 25 19 9 3 80 12 305 713⁄16 198 27⁄16 61 3 76 71⁄2 191 1 25 24 11 4 100 14 356 8 203 3 76 37⁄16 87 91⁄4 235 11⁄4 32 42 19 5 125 171⁄2 445 101⁄8 257 35⁄8 92 415⁄16 125 10 254 11⁄4 32 81 37 6 150 2011⁄16 526 103⁄8 264 47⁄16 113 57⁄8 149 11 279 2 50 120 54 8 200 283⁄16 716 2213⁄16 579 511⁄16 144 77⁄8 200 131⁄2 343 21⁄4 57 310 141 10 250 30 762 285⁄8 727 69⁄16 167 915⁄32 240 16 406 21⁄4 57 460 209 12 300 381⁄16 967 325/8 829 75⁄8 194 125⁄8 321 19 483 21⁄4 57 870 395

Angle Pattern (Field Convertible*)

Size (DN) Dimensions (approx.) Flange dia. Spacer Weight A C D E F1 F2 125# in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs kgs 21⁄2 65 115⁄8 295 73⁄8 187 23⁄4 70 45⁄8 117 29⁄16 64 7 178 7 178 1 25 19 9 3 80 1111⁄16 297 83⁄8 213 27⁄16 61 37⁄8 98 3 76 713⁄16 199 71⁄2 191 1 25 24 11 4 100 123⁄8 314 95⁄8 245 3 76 43⁄8 111 37⁄16 87 8 200 91⁄4 235 11⁄4 32 42 19 5 125 155⁄8 397 12 305 35⁄8 92 51⁄2 140 415⁄16 124 101⁄8 253 10 150 11⁄4 32 81 37 6 150 17 432 141⁄8 359 47⁄16 111 65⁄8 168 57⁄8 149 103⁄8 264 11 279 2 50 120 54 8 200 32 813 1815⁄16 481 511⁄16 145 93⁄16 234 77⁄8 200 2213⁄16 580 131⁄2 343 21⁄4 57 310 141 10 250 387⁄8 975 205⁄16 516 69⁄16 161 93⁄4 248 915⁄32 240 285⁄8 727 16 406 21⁄4 57 460 209 12 300 465⁄8 1184 241⁄16 612 75⁄8 194 14 356 125⁄8 321 325/8 825 201⁄2 521 21⁄4 57 870 395*Note: Series TDV valves are shipped as straight pattern from fac to ry. To convert to angle pattern refer to instruction sheet shipped with valve.

A

C

D

F

F2 EA

C

D

F1

FlangeDia.

FlangeDia.

Spacer

Spacer

Pressure-TemperatureGrooved Ends Only

Maximum Working Pressure: 375psi (26.25 bar)


Flange

Maximum Working Pressure:

Class 125: 175psi (12 bar)


Materials of Con struc tionBody Ductile Iron ASTM A536 GR65-45-12Disc Bronze ASTM B584 C-84400Seat 21⁄2" – 6" (65 – 150mm) Engineered Resin

8" – 12" (200 – 300mm) EPDM Stem Stainless Steel ASTM S582 Type 416Spring Stainless Steel ASTM S302O-ring Buna-NMeter Ports NPT Brass Body with capDrain Tappings (2) 1/4" Brass plugNote: Series TDV valves are shipped with grooved ends stan dard. For com pan ion flang es, please specify size and class rating when or der ing. In su la tion blocks are also ordered separately from valve. Please spec i fy size when or der ing.

For additional information, request literature ES-TDV.

Angle Pattern (Con vert ible)Straight Pattern (Stan dard)

Models PG-2 – PG-6

PG-2 – PG-6 PG-8Max. Pressure 300psi (20.7 bar) 500psi (34.5 bar)Max. Temp. 235°F (113°C) 235°F (113°C)Accuracy ± 3% ± 5%Carrying Case Yes YesShutoff Valves No NoKits contain case, differential meter, two lengths of hose with gauge fittings, air venting features and instructions.

Model PG-8

Series CSM-91-IKInsulation KitsSizes: 21⁄2" – 4" (65 – 100mm)Series CSM-91-IK Insulation Kits are available in sizes 21⁄2" – 6" (65 – 150mm) to suit Watts Series CSM-91 balancing valves and Series TDV triple duty valves. The outside shell is a preformed, removable PVC jacket with a flame spread rating of 50 or less. These systems provide sufficient mineral fiberglass insulation to meet ASHRAE 90.1 specifications in operating con-ditions with maximum fluid design operating temperature range of 141°F – 200°F (61˚C – 93˚C) and mean rating temperature of 125°F (52˚ C).

Series PGPressure Differential GaugesSeries PG Pressure Differential Gauges are designed for use with all Watts flow measurement valves and flow measurement orifices. This Series may also be used to check differential pres-sures across other system components including pumps, strain-ers, coils, etc. All readout kits feature overrange protection and are equipped with hoses, carrying case and instructions.

Features• Portable

• For use with Watts flow measurement valves & orifices

• Overrange protection

• Equipped with hoses, carrying case and instructions

Ranges:PG-2 0 – 16 ft. (0 – 4876 kg/m2) waterPG-3 0 – 35 ft. (0 – 10668 kg/m2) waterPG-4 0 – 100 in. (0 – 2540 kg/m2) waterPG-5 0 – 200 in. (0 – 5080 kg/m2) waterPG-6 0 – 50 in. (0 – 1270 kg/m2) waterPG-8 0 – 135 in. (0 – 3429 kg/m2) water

For additional information, request literature ES-CSM-91-INS.

For additional information, request literature ES-PG-2-6 or ES-PG-8.

Nordel® is a registered trademark of Dupont Dow Elastomers.

Viton® is a registered trademark of Dupont Dow Elastomers.

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F-CBFM 1023 © 2011 Watts

USA: No. Andover, MA • Tel. (978) 688-1811 • Fax: (978) 794-1848 • www.watts.comCanada: Burlington, ON • Tel. (905) 332-4090 • Fax: (905) 332-7068 • www.wattscanada.ca

A Watts Water Technologies Company

balancing & flow measurement valves

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