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Preaction 328b
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: 269-945-9501 Technical services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
Table 1 - Pipe Capacity for sizing Air Compressors
Pipe Diameter
schedule 40 (1" to 6")
Us
International
1"
DN25
1-1/4"
DN32
1-1/2"
DN40
2"
DN50
2-1/2"
DN65
3"
DN80
3-1/2"
DN90
4"
DN100
5"
DN125
6"
DN150
8"
DN200
For Metric Units 1 Ft. = 0.3048 M, 1 Gal. = 3.785L
ordering Information:
Available since 2010
Part Number: Electric Release Preaction Riser Assembly: 16187-1
(Re�er to Figure 8)
Accessories: (See Figure 9)
Drain Mani�old: 16211
Model E-1 Accelerator: 08055
Model LD-1 Anti-Column Device: 14800
4. INsTALLATIoN:
A. General Installation Instructions:
1. For �ro�er o�eration and a��roval, the valve must be installed in the vertical �osition as trimmed �rom the �actory. DO NOT
modi�y the �actory assembled trim exce�t as described in this technical data sheet.
2. A 10" section o� �i�e is �rovided with the G-2000P Electric Release Preaction Riser Assembly. Prior to valve maintenance,
this section o� �i�e may be removed to �rovide clearance �or li�ting the cover �rom the body.
3. The G-2000P �alve must be installed in an area not subject to �reezing tem�eratures or �hysical damage. I� required, �rovide
a valve house (enclosure) with adequate heat around the valve and trim. Freezing tem�eratures will damage the G-2000P
�alve. When corrosive atmos�heres and/or contaminated water su��lies are �resent, it is the owner's res�onsibility to veri�y
com�atibility with the Model G-2000P �alve and associated equi�ment.
4. The �iking Model E-1 Accelerator should be installed at the location indicated in Figure 1 when required. Note: The accelera-
tor would only be used �or Double Interlock Systems.
B. Air supply Design:
1. Air Com�ressor Size
�iking recommends a minimum o� 15 to 20 PSI (1.0 to 1.4 bar) o� su�ervisory �ressure be established within the �i�ing network
�or single interlock systems (re�er to Table 2 �or double interlock systems). While lower �ressures are allowed by NFPA 13 �or
single interlock �reaction systems, maintaining higher air �ressure within the system will assist maintenance �ersonnel in �inding
and isolating inadvertent or accidental leaks within the system quickly.
NFPA 13 requires that the air su��ly be ca�able o� �illing the entire s�rinkler system to its required air �ressure within 30 minutes.
A common method o� sizing an air com�ressor is to use the �ollowing �ormula:
� x P
Com�ressor
Size (c�m) =
7.48 x 14.7 x T
There�ore, the com�ressor shall be ca�able o� �roviding 5 c�m.
TECHNICAL DATA
Capacity
schedule 10
schedule 30 (8")
Gal / Ft
L / m
Gal / Ft
0.045
0.559
0.049
0.078
0.969
0.085
0.106
1.316
0.115
0.174
2.161
0.190
0.248
3.080
0.283
0.383
4.756
0.434
0.513
6.370
0.577
0.660
8.196
0.740
1.040
12.915
1.144
1.501
18.640
1.649
2.660
33.032
2.776
where:
� = �olume
P = Required Air Pressure
T = Fill time (ty�ically 30 min.)
7.48 = gal. / �t.
14.7 = atmos�heric �ressure
For systems with Tank-Mounted Compressors:
Air Maintenance
Device
L / m
Air Pressure
0.608
Su�ervisory Switch
1.043
Low Air Alarm
1.428
Switch
2.360
For systems with riser-Mounted Compressors:
3.515
Com�ressor On/O��
5.390
Switch
7.165
Air Pressure
9.190
Su�ervisory Switch
14.206
Low Air Alarm
20.477
Switch
30.472
Table 3 - Quick reference Compressor size
Compressor
size (HP)
1/6
1/3
1/2
1
Example:
System volume as determined by table 1 = 750 gallons
Required Air �ressure = 20 PSI (1.4 bar) (Single Interlock
System)
3
Com�ressor Size (c�m) =
2" MoDEL G-2000P PrEACTIoN
wITH ELECTrIC rELEAsE
Table 2 - Air Pressure settings
single Interlock Double Interlock
20 PSI (1.4 bar)
15 PSI (1.0 bar)
--
15 PSI (1.0 bar) /
25 PSI (1.7 bar)
10 PSI (.7 bar)
--
Free Air @
Max system size to
40 PsI (2.8 bar)
(2.8 bar)
Pump to 40 PsI (2.8 bar)
(cfm)
in 30 Minutes (Gal)
1.0
2.0
3.1
5.9
(750 x 20)
7.48 x 14.7 x 30
January 6, 2012
30 PSI (2.1 bar)
25 PSI (1.7 bar)
20 PSI (1.4 bar)
30 PSI (2.1 bar) /
40 PSI (2.8 bar)
25 PSI (1.7 bar)
20 PSI (1.4 bar)
(2.8 bar)
90
180
300
600
= 4.5 c�m
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