TECHNICAL DATA
May 28, 2013
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: [email protected]
Preaction 325b
4” MoDEL G-4000P PrEACTIoN
wITH ELECTrIC rELEAsE
ordering Information:
Available since 2009.
Part Number: G-4000P Electric Release Preaction System Riser
Assembly - 15651-1 (Re�er to Figure 8.)
Accessories:
(See �igure 9.)
Drain Mani�old: 15588
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 12” section o� �i�e is �rovided with the G-4000P Electric Release Preaction System Riser Assembly. Prior to valve mainte-
nance, this section o� �i�e may be removed to �rovide clearance �or li�ting the cover �rom the body.
3. The Model G-4000P �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-4000P valve. 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-4000P �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 accelerator
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:
where:
� = �olume
P = Required Air Pressure
T = Fill time (ty�ically 30 min.)
7.48 = gal. / �t.
3
14.7 = atmos�heric �ressure
Example:
System volume as determined by table 1 = 750 gallons
Required Air �ressure = 20 �si (Single Interlock System)
Com�ressor
Size (c�m) =
� x P
7.48 x 14.7 x T
There�ore, the com�ressor shall be ca�able o� �roviding 5 c�m.
Table 1 - Pipe Capacity for sizing Air Compressors
Pipe Diameter
Capacity
Us
International
schedule 40 (1” to 6”)
schedule 30 (8”)
schedule 10
Gal / Ft
L / m
Gal / Ft
L / m
1”
DN25
0.045
0.559
0.049
0.608
1-1/4”
DN32
0.078
0.969
0.085
1.043
1-1/2”
DN40
0.106
1.316
0.115
1.428
2”
DN50
0.174
2.161
0.190
2.360
2-1/2”
DN65
0.248
3.080
0.283
3.515
3”
DN80
0.383
4.756
0.434
5.390
3-1/2”
DN90
0.513
6.370
0.577
7.165
4”
DN100
0.660
8.196
0.740
9.190
5”
DN125
1.040
12.915
1.144
14.206
6”
DN150
1.501
18.640
1.649
20.477
8”
DN200
2.660
33.032
2.776
30.472
For Metric Units 1 Ft. = 0.3048 M, 1 Gal. = 3.785L
Table 3 - Quick reference Compressor size
Compressor
size (HP)
Free Air @
40 PsI (cfm)
Max system size to
Pump to 40 psi
in 30 Minutes (Gal)
1/6
1.0
90
1/3
2.0
180
1/2
3.1
300
1
5.9
600
Table 2 - Air Pressure settings
For systems with Tank Mounted Compressors:
single Interlock Double Interlock
Air Maintenance
Device
20 PSI (1.4 bar)
30 PSI (2.1 bar)
Air Pressure
Su�ervisory Switch
15 PSI (1.0 bar)
25 PSI (1.7 bar)
Low Air Alarm
Switch
--
20 PSI (1.4 bar)
For systems with riser Mounted Compressors:
Com�ressor On/O��
Switch
15 PSI (1.0 bar) /
25 PSI (1.7 bar)
30 PSI (2.1 bar) /
40 PSI (2.8 bar)
Air Pressure
Su�ervisory Switch
10 PSI (.7 bar)
25 PSI (1.7 bar)
Low Air Alarm
Switch
--
20 PSI (1.4 bar)
Com�ressor Size (c�m) =
(750 x 20)
= 4.5 c�m
7.48 x 14.7 x 30
