T h e F i r s t N a m e i n A i r D i f f u s i o n

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table of contents

XAFT - EXHAUST VALVESProduct Description ...........................................................................................................................E-3

Dimensional Data ..............................................................................................................................E-4

K-Factors for Flow Sensors .................................................................................................................E-5

Sound Data ............................................................................................................................E-6 – E-11

Features at a Glance........................................................................................................................E-12

Typical Specifications ........................................................................................................................E-17

XEZT - EXHAUSTProduct Description .........................................................................................................................E-13

Dimensional Data ............................................................................................................................E-14

Air Pressure Drop Data....................................................................................................................E-15

Features at a Glance........................................................................................................................E-16

Typical Specifications ........................................................................................................................E-18

model XAFTExhaust Valves

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APPLICATION• Exhaust flow control in critical spaces including laboratories,

industrial air flow applications, and hazardous environments

• VAV fume hood applications utilizing face velocity controls

• General room exhaust

• Round inlet and outlet for installation in round / spiralductwork.

• Normally open or closed fail safe positions using rapidresponse pneumatic actuators

• Control strategies using pneumatic, analog, or direct digitalcontrol (DDC) systems

FEATURES• Round inlet sizes from 5" to 16" diameter.

Rectangular 24" x 16" available.

• Velocity wing sensor with 20 sensing points for extremelyaccurate airflow sensing – fire retardant ABS plastic.

• Solid 1/2" ø cast aluminum shaft machine riveted todamper blade assembly insures years of trouble free andsafe operation

• Rigid, 20 gauge galvanized construction with rolled stiffeningbeads / duct stops

• Damper includes a cross-linked polyethylene perimeter lipseal that is highly resistant to most chemicals

• 90° damper rotation from full open to closed

• Self-lubricating damper shaft bearings

• Balancing taps and calibration chart are standard to aid fieldadjustment and commissioning

OPTIONS & ACCESSORIES • Valve available in aluminum or 304 / 316 stainless steel

construction (“exposed to flow” parts)

• PX-2 cross flow sensor (PVC center hub) or Traversing stylesensors available with orifice plates for high degree of flowrange flexibility (Aluminum or 304/ 316 stainless steel)

• Non-obstructive air flow sensors

• Orifice plates to amplify low signals from airflow sensors forincreased accuracy

• Phenolic coating for improved fume protection against acids,alkalies, solvents, and inorganic salts

• Digital, analog, or pneumatic control systems

Traverse Air Flow Sensor

Optional PX-2 CrossAir Flow Sensor

Optional Amplifying Orifice Rings (see page E-5)

Model XAFT shown with Velocity Wing Airflow Sensor

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model XAFTExhaust Valves

dimensional data

24 X 16 AVAILABLE. CONTACT AN ANEMOSTAT REPRESENTATIVE FOR DETAILS.

YL

X

A, O

.D.

NOTES: - 8" diameter shown

12

14

16

5

6

7

8

10

SIZE

10

10

9

9

9

9

4-7/8

5-7/8

6-7/8

A, Ø

9-7/8

11-7/8

13-7/8

15-7/8

7-7/8

12-1/16

14-1/16

16-1/1610

12-1/8

10-7/8

10-7/8

10-7/8

X

9 10-7/8

Y

23-57/64

23-57/64

23-57/64

20-5/16

20-5/16

20-5/16

20-5/16

20-5/16

L

2

2

AIRFLOWDIRECTION

Z

B

6-1/2

OPTIONALENCLOSURES

STANDARD (C3)

LARGE (C4)

B

14-5/8

18-1/2

Z

11-1/2

16

NOTE: LOCATION OF ENCLOSURE ON XAFT VALVE WILL VARY BASED ONCONTROLS WITHIN THE ENCLOSURE

Optional Control Enclosure

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TABLE 60: K-FACTORS FOR AIR FLOW SENSORS

High Range (H) Lo Range (L)

High Range (P) Lo Range (Q)

5 380 250 217 (S) 134 (S12) 90 (S29)6 584 400 316 (S) 221 (S3) 148 (S2) 110 (S1)7 801 595 560 (S17) 445 (S) 300 (S18)8 1088 800 770 (S19) 600 (S) 436 (S4) 316 (S5)10 1767 1300 1350 (S15) 950 (S) 713 (S11) 626 (S7) 515 (S6)12 2542 2000 2000 (S20) 1407 (S) 1265 (S8) 840 (S14)14 3629 2800 2950 (S23) 2483 (S28) 2074 (S) 1505 (S10) 1090 (S9)16 4427 4000 3800 (S25) 3300 (S24) 2728 (S) 1490 (S27)

5 380 250 217 (S) 134 (S12) 90 (S29)6 584 400 316 (S) 221 (S3) 148 (S2) 110 (S1)7 801 595 560 (S17) 445 (S) 300 (S18)8 1088 800 770 (S19) 600 (S) 436 (S4) 316 (S5)10 1767 1300 1350 (S15) 950 (S) 713 (S11) 626 (S7) 515 (S6)12 2542 2000 2000 (S20) 1407 (S) 1265 (S8) 840 (S14)14 3629 2800 2950 (S23) 2483 (S28) 2074 (S) 1505 (S10) 1090 (S9)16 4427 4000 3800 (S25) 3300 (S24) 2728 (S) 1490 (S27)

ORIFICE AMPLIFYING PLATES

ORIFICE AMPLIFYING PLATESTRAVERSING STYLE AIR FLOW SENSOR

MODEL PX-2 CROSS AIR FLOW SENSOR

InletSize

InletSize

K-factors shown represent the flow rate, CFM, resulting in a sensor signal ∆P = 1.00" wg (non-dynamic signal measurement)Example: 10" Model XAFT valve with PX-2 cross sensor, S orifice plate, operating at 500 CFM. Find K-factor of 950 CFM. To determine sensor signal: ∆P = (CFM/K)2 = (500/950)2 = .28" wg.

Airflow CalculationsVelocity Wing SensorsSensor ∆P = (CFM/K)2CFM = K(√∆P)Example: For a 12” inlet unit with a sensor ∆P signal of 0.60 inches w.g., the CFM is calculated to be 1400 CFM.CFM = K(√∆P) = 1802(√0.60) = 1400 For a 12” inlet unit with 1400 CFM, the sensor ∆P signal is calculated to be 0.60 inches w.g. ∆P = (CFM/K)2 = (1400/1802)2 =0.60” w.g.

VELOCITY WING SENSORInlet Size 5 6 7 8 9 10 12 14 16 24x16K-Factor 287 469 612 867 1098 1353 1802 2469 3366 6358Area (sq. ft) 0.130 0.188 0.258 0.338 0.430 0.532 0.769 1.050 1.375 2.667

MODEL SW SIDEWALL NON-OBSTRUCTIVE AIR FLOW SENSORInlet Size 5 6 8 10 12 14 16K-Factor 276 391 772 1020 1614 2001 2929Area (sq. ft) 0.130 0.188 0.338 0.532 0.769 1.050 1.375

FLOW

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model XAFTExhaust Valves

sound data

TABLE 61: NC VALUES

200 0.01

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sound data

ΔPs ΔPt ΔPt 2 3 4 5 6 7 ΔPt 2 3 4 5 6 7 ΔPt 2 3 4 5 6 7 ΔPt 2 34 5 6 7

200 0.01 0.07 0.07 52 43

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model XAFTExhaust Valves

sound data

ΔPs ΔPt ΔPt 2 3 4 5 6 7 ΔPt 2 3 4 5 6 7 ΔPt 2 3 4 5 6 7 ΔPt 2 34 5 6 7

200 0.01 0.07 0.07

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sound data

TABLE 64: NC VALUES - “S” RANGE (ORIFICE RING)

150 0.06

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model XAFTExhaust Valves

sound data

ΔPs ΔPt ΔPt 2 3 4 5 6 7 ΔPt 2 3 4 5 6 7 ΔPt 2 3 4 5 6 7 ΔPt 2 3 4 5 6 7

150 0.06 0.10 0.10 49 43 38 32

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sound data

ΔPs ΔPt ΔPt 2 3 4 5 6 7 ΔPt 2 3 4 5 6 7 ΔPt 2 3 4 5 6 7 ΔPt 2 34 5 6 7

150 0.06 0.10 0.10

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model XAFTExhaust Valves

features at a glance

� XAFT - Exhaust ValveMODEL

� 5" Ø� 6" Ø� 7" Ø� 8" Ø� 9" Ø

� 10" � 12" � 14" � 16" � 24"x16"

INLET SIZE

� Pneumatic Controls� Electronic Analog Controls� Direct Digital Controls

(DDC)� Electric ControlsControl strategies availablefor all applications

CONTROL SYSTEM

� Right Side� Left Side

CONTROL SIDE

� Velocity Wing� Traverse� PX-2� Orifice Ring

AIR FLOW SENSOR

ACCESSORIES� Standard Control Enclosure� Large Control Enclosure� Phenolic Coating

� Galvanized Steel� 304 Stainless Steel� 316 Stainless Steel� Aluminum

� 20 Gauge

CONSTRUCTION

�

�

model XEZTExhaust / Return Air Terminal

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APPLICATION• Exhaust flow control in critical spaces including laboratories,

industrial air flow applications, and hazardous environments

• VAV fume hood applications utilizing face velocity controls

• General room exhaust

• For use with square / rectangular inlet ductwork, roundoutlet ductwork

• Insulated casing for attenuation of discharge sound levels

• Normally open or closed fail safe positions using rapidresponse pneumatic actuators

• Control strategies using pneumatic, analog, or direct digitalcontrol (DDC) systems to satisfy any application

FEATURES• Right or left hand controls location

• Slip & Drive inlet duct connection

• 22 gauge steel, leak resistant casing lined with 1/2" dual-density acoustical insulation (NFPA 90A & UL181)

• Square / rectangular inlet with outlet sizes from 5" to 16"diameter

• Model XEZTA includes discharge sound attenuator

• Velocity wing flow cross sensor for extremely accurate flowsensing

• Balancing taps and calibration chart are standard to aid fieldadjustment

OPTIONS & ACCESSORIES• Bellmouth re-entrant design reduces pressure requirements

and sound levels (5" to 16" diameter)

• 304/316 stainless steel construction or aluminum on allmetal “exposed to flow” components

• Phenolic coating for improved fume protection against acids,alkalies, solvents, and inorganic salts.

• Steel control enclosure, screw attached cover

• Digital, analog, or pneumatic control systems

• Bottom access door (Patch plate, Double cam-lock, Hinged)model XEZTA only

• 1” thick glass fiber insulation, 1/2" or 1" foil-faced insulation(taped edges).

Right hand control enclosure shown

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model XEZTExhaust / Return Air Terminal

product description

Notes:1. Control enclosure is optional on all units.

2. Weights are approximate and will vary based on selected options, insulation type, etc.

3. Control enclosures add 5 lbs. to unit weight.

4. Left hand controls shown. 5. Size 24x16 has different duct connection typefrom that shown.

6. Bellmouth design on round sizes only.

CFM Inlet Dimensions WeightSize Max. D W H X Y L S (lbs)05 350 4 7/8 10 10 8 3/4 8 3/4 13 11/16 3 906 500 5 7/8 10 10 8 3/4 8 3/4 14 7/16 3 907 675 6 7/8 12 10 10 3/4 8 3/4 14 5/32 3 1108 900 7 7/8 12 10 10 3/4 8 3/4 14 9/16 4 1109 1100 8 7/8 14 12 1/2 12 3/4 11 1/4 16 3/8 4 1510 1400 9 7/8 14 12 1/2 12 3/4 11 1/4 16 1/4 4 1512 2000 11 7/8 16 15 14 3/4 13 3/4 20 7/16 5 1/2 1914 3000 13 7/8 20 17 1/2 18 3/4 16 1/4 20 1/4 5 1/2 2316 4100 15 7/8 24 17 1/2 22 3/4 16 1/4 20 5/16 6 1/2 28

24x16 7000 24x16 38 18 38 18 30 5 7/16 79

DISCHARGE VIEW(L.H. CONTROLS SHOWN)

W

H

7-1/4S

D

SLIP & DRIVE CLEAT CONNECTOR

SIDE VIEW

L

11-1/2

14-5/8

OPTIONALCONTROL ENCLOSURE

(STANDARD SIZE, RIGHT HAND ENCLOSURE SHOWN)

AIR FLOW

VELOCITY WING

Y

X

INLET VIEW

XEZTS - BASIC ASSEMBLY

XEZTA - WITH INTEGRAL SOUND ATTENUATOR

Notes:1. Control enclosure is optional on all units.2. Weights are approximate and will vary based on selected options,insulation type, etc.

3. Control enclosures add 5 lbs. to unit weight.

4. Left hand controls shown. 5. Size 24x16 has different duct connectiontype from that shown.

6. Bellmouth design on round sizes only.

L

W

H

7-1/4

S

D

SLIP & DRIVE CLEAT CONNECTOR

SIDE VIEW

14-5/8

11-1/2

DISCHARGE VIEW(L.H. CONTROLS SHOWN)

OPTIONALCONTROL ENCLOSURE

(STANDARD SIZE, RIGHT HAND ENCLOSURE SHOWN)

AIR FLOW

VELOCITY WING

INLET VIEW

X

Y

CFM Inlet Dimensions WeightSize Range D W H X Y L S (lbs)05 0 – 350 4 7/8 10 10 8 3/4 8 3/4 39 1/2 3 2006 0 – 500 5 7/8 10 10 8 3/4 8 3/4 39 1/2 3 2007 0 – 675 6 7/8 12 10 10 3/4 8 3/4 39 1/2 3 2208 0 – 900 7 7/8 12 10 10 3/4 8 3/4 39 1/2 4 2209 0 – 1100 8 7/8 14 12 1/2 12 3/4 11 1/4 39 1/2 4 2810 0 – 1400 9 7/8 14 12 1/2 12 3/4 11 1/4 39 1/2 4 2812 0 – 2000 11 7/8 16 15 14 3/4 13 3/4 39 1/2 5 1/2 3214 0 – 3000 13 7/8 20 17 1/2 18 3/4 16 1/4 39 1/2 5 1/2 3916 0 – 4100 15 7/8 24 17 1/2 22 3/4 16 1/4 39 1/2 6 1/2 4424x16 0 – 7000 24x16 38 18 38 18 42 5 7/16 109

All dimensions are in inches

All dimensions are in inches

model XEZTExhaust / Return Air Terminal

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air pressure drop data

Inlet Airflow Pressure Drop (IN WG)Size (CFM) XEZTS & XEZTA

5 125 0.08175 0.15250 0.32300 0.46350 0.62

6 200 0.09250 0.14300 0.19350 0.27400 0.35500 0.54

7 250 0.07300 0.10400 0.17500 0.27600 0.38675 0.49

8 350 0.08475 0.14600 0.22700 0.31800 0.40900 0.51

9 450 0.08525 0.11600 0.14700 0.19900 0.32

1100 0.47

Static Pressure Drop

Notes:1. Air pressure drop is the difference in static pressure from the terminal inlet and discharge with the damper in the fully open position.

Inlet Airflow Pressure Drop (IN WG)Size (CFM) XEZTS & XEZTA

10 550 0.08675 0.12800 0.161000 0.261200 0.371400 0.50

12 800 0.081000 0.121200 0.181400 0.241700 0.362000 0.49

14 1050 0.071400 0.131800 0.222200 0.322600 0.453000 0.60

16 1400 0.081900 0.142400 0.222900 0.333500 0.484100 0.66

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model XEZTExhaust / Return Air Terminal

features at a glance

� XEZTS - Basic Assembly� XEZTA - with Integral

Sound Attenuator

MODEL � 5" Ø� 6" Ø� 7" Ø� 8" Ø� 9" Ø

� 10" � 12" � 14" � 16" � 24"x16"

INLET SIZE

� Pneumatic Controls� Electronic Analog Controls� Direct Digital Controls

(DDC)� Electric ControlsControl strategies availablefor all applications

CONTROL SYSTEM

� Right Side� Left Side

CONTROL SIDE

� 1/2" Matte Insulation� 1" Matte Insulation

CASING TREATMENTS

� Bottom � Side

ACCESSORIES

CASING OPTIONS� Unit Mounting Bracket (shipped loose)� Manual Damper Locking� Standard Control Enclosure� Large Control Enclosure� Hinged Front Panel (control enclosure)

ACCESS DOORS (XEZTA ONLY)

� Patch Plate� Double Camlock

� Hinged Camlock

� Galvanized Steel� 304 Stainless Steel� 316 Stainless Steel� Aluminum

� 22 Gauge� 20 Gauge

CASING CONSTRUCTION

Right hand control enclosure shown

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Provide and install Anemostat Model XAFT exhaust valves whereshown on drawings or schedule, that comply with the indicatedsize, capacity, and performance ratings. The exhaust valves shallhave been tested and performance determined in accordancewith industry standards ARI 880 and ASHRAE 130.

Acoustical PerformanceExhaust valve radiated and discharge sound levels shall notexceed the power levels as scheduled, at the differential staticpressure (∅Ps) shown.

ConstructionThe valve shall be constructed of minimum 20 gauge (zinc-coat-ed sheet steel) (304 stainless steel) (316 stainless steel) (alu-minum) and shall include a steel control enclosure, housing allprimary flow controls, including actuators, controllers, relays,etc. (Optional) All metal parts exposed to the air stream shall becoated with a phenolic material for improved fume protection.

Air Valve:The damper assembly shall consist of a round blade thatrequires nominal 90-degree rotation from fully opened to fullyclosed positions on sizes 05 through 16. The damper blade shallbe mechanically attached to the die-cast metal damper shaft withthrough the shaft machine-applied rivets. The low leakagedamper shall be constructed of a gasket material sandwichedbetween two 22-gauge zinc coated steel plates. Leakage throughthe damper shall be less than 1% of the maximum rated airflowat 3” w.g. inlet static pressure. The damper gasket material issecurely fastened between the two damper plates using machineapplied rivets. The damper assembly shall rotate freely in self-lubricating bearings. Damper position shall be indicated on theend of the shaft on the outside of the casing. Outlet connectionand damper on size 24 x 16 shall be rectangular.

The damper leakage shall not exceed 2% of the maximum ratedcapacity of the inlet at 4” differential static pressure. Damperposition shall be indicated on the end of the shaft on the outsideof the casing. The primary damper fail positions for pneumaticapplications (normally open / normally closed) shall be easily re-configured in the field.

Air Flow SensorA multi-point, cross style airflow sensor (Velocity Wing) of thecenter averaging type shall be located in the terminal inlet. Thesensor shall be aerodynamically designed to provide low pres-sure loss, quiet operation, and shall incorporate at least 20sensing points for all diameters/sizes. The sensor shall amplifythe velocity pressure signal and provide feedback of actual flowto the controller with an accuracy of ± 5%. An identificationlabel with piping / wiring diagram and air flow calibration chartshall be affixed to each unit. Flow taps with caps, separate fromthe airflow sensor or controller taps shall be provided for flowmeasurement and adjustment.

(Optional)A multi-point, cross style airflow sensor (PX-2) of the centeraveraging type shall be located in the terminal inlet. The sensorshall consist of (aluminum)(304 stainless steel)(316 stainlesssteel) construction utilizing a PVC center averaging hub. Thesensor shall be capable of measuring flow with an accuracy of ±5%. Where scheduled, sharp-edged orifice plates shall be pro-vided in conjunction with the sensor to increase the signal flowpressure for improved controllability and accuracy at the designflow rate shown. Orifice plates shall be constructed from (alu-minum)(304 stainless steel)(316 stainless steel). Air flow cali-bration charts shall be attached to each terminal unit.

Control SystemThe controls shall be pneumatic, analog electronic, or direct dig-ital controls (DDC) based on Anemostat Control Package______________.

XAFT

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model typical specification

Furnish and install Anemostat (XEZTS) (XEZTA with integralsound attenuator) exhaust air terminals as shown on the plans.The assembly shall consist of an insulated casing, damper, andairflow sensor with bellmouth construction.

Casing:The unit casing shall be fabricated from zinc-coated steel anduse mechanical locking seams to form a leak resistant assem-bly. The terminal inlet connection shall be Slip & Drive type inte-gral to the casing. The casing shall be (22 gauge) (20 gauge)thickness. The unit casing shall be internally lined with (1/2”)(1”) thick matte-faced dual density glass fiber insulation that con-forms to NFPA-90A and UL 181.

Air Valve:The damper assembly shall consist of a round blade thatrequires nominal 90-degree rotation from fully opened to fullyclosed positions on sizes 05 through 16. The damper blade shallbe mechanically attached to the die-cast metal damper shaft withthrough the shaft machine-applied rivets. The low leakagedamper shall be constructed of a gasket material sandwichedbetween two 22-gauge zinc coated steel plates. Leakage throughthe damper shall be less than 1% of the maximum rated airflowat 3” w.g. inlet static pressure. The damper gasket material issecurely fastened between the two damper plates using machineapplied rivets. The damper assembly shall rotate freely in self-lubricating bearings. Damper position shall be indicated on theend of the shaft on the outside of the casing. Outlet connectionand damper on size 24 x 16 shall be rectangular.

Airflow Sensor:A multi-point airflow sensor (Velocity Wing) of the center averag-ing type shall be located in the terminal inlet. The airflow sensorshall be aerodynamically designed to provide low pressure loss,quiet operation and have not less than 20 sensing points on anygiven size unit. The sensor shall amplify the velocity pressuresignal and provide feedback of actual flow to the controller. An identification label with piping/wiring diagram and airflow cali-bration chart shall be affixed to each unit. Flow taps with caps,separate from the airflow sensor or controller taps shall be pro-vided for flow readjustment.

Control SystemThe controls shall be pneumatic, analog electronic, or direct dig-ital controls (DDC) based on Anemostat Control Package______________.

The following accessories shall be provided, as scheduled:

• Unit mounting brackets • Standard control enclosure• Universal (larger) control enclosure• Hinged front cover for control enclosure

XEZT

Model XAFT - Exhaust ValvesFlow SensorsSound DataFeatures At A GlanceTypical Specification

Model XEZT - Exhaust / Return Air TerminalXEZTS - Basic AssemblyXEZTA - AttentuatorAir Pressure Drop DataFeatues At A GlanceTypical Specification