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Seiho's Model PK-R/PK-RA Aluminum SpotDiffuser offers excellent architectural styling for directional control in supply applications. The PK-R designed specifically for mounting to round (spiral) sheet metal duct work, it provides an integral, readily-accessible air flow adjustment. The heavy-gauge anodized, aluminum and stainless steel construction is corrosion-resistant for years of service. The anodized aluminum finish integrates seamlessly with the galvanized sheet metal finish and color.
Material
 Aluminum
Finish
 Anodized (Custom Colors Available)
PK-RA Duct Sizes
 6" 7" 8" 10" 12" 16" 20"
PK-R Duct Sizes
 8" 10" 11" 14" 16" 20" 24"
 PK-R / PK-RA Download
 Catalog
 Submittal Sheet
 PK-R (Inch / Metric)
 PK-RA (Inch / Metric)
 Performance Data (Inch / Metric)
 High Resolution Picture
 (PK-R / PK-RA)

Features

 The model PK-R and PK-RA can be mounted in a vertical or horizontal position or any angle in between. The architect or engineer has unlimited applications and an infinite choice of mounting locations.

 The ventilation efficiency of the PK-R and PK-RA allow long airflow throws to ventilate or condition remote areas where ducting would be impractical or cost prohibitive.

 The directional control can pinpoint the airflow where it's needed as space or occupant configurations change. This feature makes these units ideal for use on stages and movie sets.

 The modulating volume control allows precise adjustment of airflow in all application without need for special tools, removal or disassembly.

 The lightweight and corrosion-resistant finish make these units easy to install and tailored to a variety of applications. Its solid construction makes this unit rugged and durable in adverse conditions, without possibility of failure of a weld or rivet.

Installation

 Specifically designed for mounting to round sheet metal duct.

Construction
 The SEIHO Model PK-R and PK-RA Aluminum SpotDiffusers are manufactured from heavy-gauge aluminum. The overall heavy-duty construction exceeds industry standards by a wide margin. The multi-directional louver body and all other components are machined to close tolerances from solid aluminum alloys, then bright polished. The flange-to-body gasket consists of two tandem felt strips for a leak-proof seal. These components comprise a unit which provides smooth movement of the louver body when adjusting its direction. The flange mounting gasket is closed-cell neoprene or felt, depending on unit size. A knurled aluminum thumb-operated airflow adjustment knob facilitates control of airflow by regulating the volume out of the exit nozzle with the precision internal damper. The internal damper is under tension by a stainless steel spring for sealing and quiet operation.

Design
 SEIHO Model PK-R and PK-RA pivoting body can be rotated in any 3-dimensional direction around its internal center.

 Maximum rotation angle up to 33 to 42 degree in all direction from its center axis.


Model PK-RA Dimensions (PDF Version)

SIZE DUCT SIZE A B C D E F G H H
PK 6RA 6" 8 11/32 7 15/32 5 29/32 6 7/32 1 1/2 3 11/16 2 15/16 6 1/4 1 1/2
PK 7RA 7" 10 3/32 9 3/32 7 7 9/32 1 1/2 4 3/8 3 17/32 7 1/4 2
PK 8RA 8" 11 27/32 9 27/32 7 7/8 8 1/32 1 23/32 4 23/32 3 15/16 8 1/4 2
PK 10RA 10" 13 3/4 12 3/4 10 1/2 10 7/8 1 31/32 6 27/32 5 1/2 10 1/4 3 1/2
PK 12RA 12" 15 5/16 14 9/32 12 12 3/8 2 15/32 7 7/8 6 1/2 12 1/4 4
PK 16RA 16" 19 1/2 18 1/2 16 5/32 16 1/2 3 5/8 9 3/4 9 1/16 16 1/4 5
PK 18RA 20" 22 1/16 21 1/16 18 1/2 18 27/32 3 3/4 11 5/8 10 1/4 20 1/4 5
PK 20RA 20" 22 1/16 21 1/16 18 16/32 18 27/32 3 3/4 11 5/8 12 7/32 20 1/4 5
Dimensions are in inches. Product information is Subject to Change Without Notice


Model PK-R Dimensions (PDF Version)

SIZE DUCT SIZE A B C D E F G H
PK 6R 8" 8 11/32 7 15/32 5 29/32 6 7/32 1 1/2 3 11/16 2 15/16 8 1/4
PK 7R 10" 10 3/8 8 3/32 7 7 9/32 1 1/2 4 3/8 3 17/32 10 1/4
PK 8R 11" 11 3/8 9 27/32 7 7/8 8 1/32 1 23/32 4 23/32 3 15/16 11 1/4
PK 10R 14" 14 3/8 12 3/4 10 1/2 10 7/8 1 31/32 6 27/32 5 1/2 14 1/4
PK 12R 16" 16 3/8 14 9/32 12 12 3/8 2 15/32 7 7/8 6 1/2 16 1/4
PK 16R 20" 20 3/8 18 1/2 16 5/32 16 1/2 3 5/8 9 3/4 9 1/16 20 1/4
PK 18R 24" 24 3/8 21 1/16 18 1/2 18 27/32 3 3/4 11 5/8 10 1/4 24 1/4
PK 20R 24" 24 3/8 21 1/16 18 16/32 18 27/32 3 3/4 11 5/8 12 7/32 24 1/4
Dimensions are in inches. Product information is Subject to Change Without Notice


Performance Data (PDF Version)

SIZE Approx.Nozzle
Velocity
500 1000 1500 2000 2500 3000 3500 4000
Terminal
Velocity, Vt
50 100 200 400 50 100 200 400 50 100 200 400 50 100 200 400 50 100 200 400 50 100 200 400 50 100 200 400 50 100 200 400
6 Nozzle Area
0.047
sq.ft.
CFM 25 50 80 100 120 150 170 190
SP(in.,wg) 0.02 0.07 0.18 0.29 0.44 0.82 0.93 1.2
NC - - < 20 20 21 27 30 33
Throw(ft.) 19 10 5 - 30 16 8 4 50 25 13 8 65 31 17 9 80 37 20 10 100 45 23 12 110 55 28 14 125 50 30 15
7 Nozzle Area
0.068
sq.ft.
CFM 35 70 110 140 170 210 240 280
SP(in.,wg) 0.016 0.06 0.18 0.28 0.41 0.65 0.9 1.25
NC - - < 20 20 25 29 34 38
Throw(ft.) 22 11 6 2 36 19 9 4 60 29 15 8 80 36 19 10 90 45 23 12 105 60 27 14 125 65 32 16 150 72 37 19
8 Nozzle Area
0.085
sq.ft.
CFM 45 90 130 170 220 260 300 340
SP(in.,wg) 0.016 0.06 0.17 0.27 0.38 0.64 0.92 1.2
NC - < 20 < 20 22 27 33 35 39
Throw(ft.) 25 12 7 4 40 20 12 6 62 30 16 9 85 39 20 11 105 52 27 13 125 62 30 17 150 72 35 19 162 80 38 20
10 Nozzle Area
0.165
sq.ft.
CFM 85 170 250 330 420 500 580 660
SP(in.,wg) 0.014 0.06 0.14 0.24 0.44 0.63 0.92 1.2
NC - < 20 < 20 20 26 30 34 38
Throw(ft.) 30 15 8 5 55 30 14 7 90 42 22 10 112 55 29 14 148 72 36 17 162 84 42 21 190 100 48 24 225 112 55 28
12 Nozzle Area
0.230
sq.ft.
CFM 115 230 350 460 580 690 810 920
SP(in.,wg) 0.012 0.055 0.12 0.22 0.43 0.6 0.92 1.2
NC - < 20 < 20 23 28 32 36 40
Throw(ft.) 35 17 9 6 66 35 17 7 100 50 27 13 137 65 34 17 162 82 42 22 187 100 50 26 220 112 57 29 250 130 70 34
16 Nozzle Area
0.448
sq.ft.
CFM 225 450 680 900 1120 1350 1570 1800
SP(in.,wg) 0.012 0.06 0.12 0.21 0.41 0.62 0.9 1.2
NC - 20 21 26 29 37 40 44
Throw(ft.) 47 25 12 7 90 47 24 12 138 66 36 18 175 95 47 23 225 112 55 28 250 137 65 35 275 160 80 42 350 175 95 47
18 Nozzle Area
0.573
sq.ft.
CFM 290 580 860 1150 1440 1720 2010 2300
SP(in.,wg) 0.01 0.06 0.10 0.21 0.42 0.6 0.9 1.15
NC - < 20 20 25 31 35 39 42
Throw(ft.) 55 27 13 7 112 55 27 13 152 98 40 20 200 110 52 26 250 125 67 33 300 155 78 40 350 175 90 47 400 200 110 48
20 Nozzle Area
0.814
sq.ft.
CFM 410 820 1230 1630 2040 2450 2850 3260
SP(in.,wg) 0.01 0.06 0.12 0.17 0.41 0.61 0.9 1.2
NC - < 20 20 27 32 38 42 45
Throw(ft.) 70 38 20 10 150 75 39 18 220 112 56 29 275 150 75 37 350 175 90 47 400 212 112 56 425 250 125 65 450 275 150 75
DASHED LINE IN SP BOX INDICATES STATIC PRESSURE IS LESS THAN 0.01 IN.W.G.
DASHED LINE IN NC BOX INDICATES NOISE LEVEL IS LESS THAN 20.
NC LEVEL IS BASED ON 10dB ROOM ATTENUATION(PWL RE:10-12 WATTS) WITH ONE DIFFUSER OPERATING.

*Seiho International reserves the right to make changes without prior notice.
*This performance data is proprietary to Seiho International, Inc., and shall not be used except as expressly authorized by the company.


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