Viking G-2000P, G-4000P Technical Data Manual

January 6, 2012

Preaction 328a

TECHNICAL DATA

The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058

Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [e-mail]

WITH ELECTRIC RELEASE

1. DESCRIPTION

The 2” Model G-2000P Preaction System with Electric Release can be used as a Single
Interlock Preaction System with Electric Release, or as a Double Interlock Preaction System
with Electric/Pneu-Lectric Release. These preaction systems are commonly used where it isThese preaction systems are commonly used where it is
important to control accidental water discharge due to inadvertent damage to the sprinkler
piping. The small profile, lightweight, pilot operated Viking G-2000P Valve comes completeThe small profile, lightweight, pilot operated Viking G-2000P Valve comes complete
as shown in Figure 8. This pilot-operated externally reset valve also includes an internal

check diaphragm, which eliminates the need for a separate check valve being installed
in the system riser.
A. Viking Supervised Single-In terlock ed Electric Rel ease Preaction Systems
Utilizing the Viking G-2000P Valve.

The system piping is pressurized with air or nitrogen as required by NFPA 13 for su­pervisory purposes only. Viking recommends a minimum of 15 to 20 PSI (1.0 to 1.4
bar) for supervisory air pressure for single interlock systems (refer to Table 2 for double
interlock systems). This feature serves to prevent undetected leaks on the system pip­ing network. If the system piping or a sprinkler is damaged, the supervisory pressure is
reduced and a “low air” supervisory alarm is activated.
Electrically released preaction systems require a 24 VDC normally closed electric so­lenoid valve controlled by an approved release control panel with compatible detection
system. In fire conditions, when the detection system operates, the system control
panel energizes the solenoid valve open. When the solenoid opens, the priming water is relieved from the internal prime chamber
assembly. The prime chamber assembly collapses, and water passes through the G-2000P Valve and internal check diaphragm
to the system piping network. The entire sprinkler system fills with water. The sprinkler piping will remain filled with water until a
sprinkler operates.

B. Viking Supervised Double-Interlocked Electric/Pneu-Lectric Release Preaction Systems Utilizing the Viking G-2000P
Valve.

The system piping is pressurized with air or nitrogen to serve both as a means of supervising the integrity of the piping network
and as one portion of the system release operation. This feature serves to prevent undetected leaks on the system piping net­work. If the system piping or a sprinkler is damaged, the supervisory pressure is reduced and a “low air” supervisory alarm is
activated.
The 24 VDC normally closed electric solenoid and an additional “low air” alarm switch are connected to a compatible release24 VDC normally closed electric solenoid and an additional “low air” alarm switch are connected to a compatible releaseelectric solenoid and an additional “low air” alarm switch are connected to a compatible release
control panel and compatible detection devices. The release control panel is programmed so that a signal from both a release
device and the low air alarm switch must be received before the solenoid is allowed to open. The air pressure switch has two
independently operating connections. The high side is wired as a low air supervisory switch, and the low side is wired as low air
alarm. In fire conditions, a detection device and the low air alarm switch must operate in order to open the solenoid valve. When
the solenoid opens, priming water is relieved from the G-2000P Valve’s internal prime chamber assembly. The prime chamber
assembly is forced open by the system water supply and water passes through the G-2000P Valve and internal check diaphragm
to the system piping network. The entire sprinkler system fills with water.

2” MODEL G-2000P PREACTION

2. LISTING AND APPROVALS

cULus Listed: VLFT

FM Approved: Preaction Sprinkler Systems

3. TECHNICAL DATA

Specifications:

Pressure Rating: 250 PSI (17.2 bar) Water Working Pressure
Factory Hydrostatically Tested to: 500 PSI (34.5 bar)
Friction Loss (Given in feet of Schedule 40 pipe based on Hazen & Williams formula C = 120):
G-2000P Valve - 8.5’
10” Section of Pipe - 1’
Water Supply Control Valve: 1.9’
Model G-2000P Valve Cv Factor: 115.6
Valve Color: Black

Material Specifications:

Refer to Figure 11.

Form No. F_011310

Q = C

Q = Flow

C

= Flow Factor (GPM/1 PSI ∆P)

v

∆P = Pressure Loss through Valve

S = Specific Gravity of Fluid

Viking Technical Data may be found on

The Viking Corporation’s Web site at

http://www.vikinggroupinc.com.

The Web site may include a more recent

edition of this Technical Data Page.

Replaces page 328a-m, dated July 1, 2011.

(Revised the replacement parts list and Figure 11.)

v

√

S

∆P

Preaction 328b

January 6, 2012

TECHNICAL DATA

The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058

Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [e-mail]

Table 1 - Pipe Capacity for Sizing Air Compressors

Pipe Diameter Capacity

Schedule 40 (1” to 6”)

US International

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

Ordering Information:

Available since 2010
Part Number: Electric Release Preaction Riser Assembly: 16187-1
(Refer to Figure 8)
Accessories: (See Figure 9)
Drain Manifold: 16211
Model E-1 Accelerator: 08055
Model LD-1 Anti-Column Device: 14800

Schedule 30 (8”)

Gal / Ft L / m Gal / Ft L / m

Schedule 10

Air Maintenance

Supervisory Switch

Compressor On/Off

Supervisory Switch

Table 3 - Quick Reference Compressor Size

Compressor

Size (HP)

Table 2 - Air Pressure Settings

For Systems with Tank-Mounted Compressors:

Device

Air Pressure

Low Air Alarm

Switch

For Systems with Riser-Mounted Compressors:

Switch

Air Pressure

Low Air Alarm

Switch

1/6 1.0 90

1/3 2.0 180

1/2 3.1 300

1 5.9 600

WITH ELECTRIC RELEASE

Single Interlock Double Interlock

20 PSI (1.4 bar) 30 PSI (2.1 bar)

15 PSI (1.0 bar) 25 PSI (1.7 bar)

-- 20 PSI (1.4 bar)

15 PSI (1.0 bar) /

25 PSI (1.7 bar)

10 PSI (.7 bar) 25 PSI (1.7 bar)

-- 20 PSI (1.4 bar)

Free Air @

40 PSI (2.8 bar)(2.8 bar)

(cfm)

Pump to 40 PSI (2.8 bar)(2.8 bar)

30 PSI (2.1 bar) /

40 PSI (2.8 bar)

Max System Size to

in 30 Minutes (Gal)

2” MODEL G-2000P PREACTION

4. INSTALLATION:

A. General Installation Instructions:

1. For proper operation and approval, the valve must be installed in the vertical position as trimmed from the factory. DO NOT
modify the factory assembled trim except as described in this technical data sheet.

2. A 10” section of pipe is provided with the G-2000P Electric Release Preaction Riser Assembly. Prior to valve maintenance,
this section of pipe may be removed to provide clearance for lifting the cover from the body.

3. The G-2000P Valve must be installed in an area not subject to freezing temperatures or physical damage. If required, provide
a valve house (enclosure) with adequate heat around the valve and trim. Freezing temperatures will damage the G-2000P
Valve. When corrosive atmospheres and/or contaminated water supplies are present, it is the owner’s responsibility to verify
compatibility with the Model G-2000P Valve and associated equipment.

4. The Viking Model E-1 Accelerator should be installed at the location indicated in Figure 1 when required. Note: The accelera­tor would only be used for Double Interlock Systems.

B. Air Supply Design:

1. Air Compressor Size

Viking recommends a minimum of 15 to 20 PSI (1.0 to 1.4 bar) of supervisory pressure be established within the piping network
for single interlock systems (refer to Table 2 for double interlock systems). While lower pressures are allowed by NFPA 13 for
single interlock preaction systems, maintaining higher air pressure within the system will assist maintenance personnel in finding
and isolating inadvertent or accidental leaks within the system quickly.
NFPA 13 requires that the air supply be capable of filling the entire sprinkler system to its required air pressure within 30 minutes.
A common method of sizing an air compressor is to use the following formula:

Compressor
Size (cfm) =

V x P

7.48 x 14.7 x T

Where:

V = Volume
P = Required Air Pressure
T = Fill time (typically 30 min.)

7.48 = gal. / ft.

14.7 = atmospheric pressure

3

Example:

System volume as determined by table 1 = 750 gallons
Required Air pressure = 20 PSI (1.4 bar) (Single Interlock
System)

Compressor Size (cfm) =

(750 x 20)

7.48 x 14.7 x 30

= 4.5 cfm

Therefore, the compressor shall be capable of providing 5 cfm.

January 6, 2012

Tank Mounted Air Riser Mounted Air

Riser Mounted Air

Compressor

Tank Mounted Air

Compressor

Pressure

Relief

Valve

Viking Model D-2 Air Maintenance

Device

Warning - Do not allow pressures

in excess of 175 psi from reaching

the AMD.

Nitrogen

Regulator*

Pressure

Relief

Valve

Nitrogen

Bottle*

Nitrogen Air Supply Option

* Not provided by

Viking

Compressor Option

Compressor Option

Preaction 328c

TECHNICAL DATA

The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058

Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [e-mail]

WITH ELECTRIC RELEASE

2” MODEL G-2000P PREACTION

Figure 1 - Air Supply Options

Preaction 328d

January 6, 2012

TECHNICAL DATA

The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058

Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [e-mail]

WITH ELECTRIC RELEASE

Figure 2 - Alarm Pressure Switch Wiring

(Alarm Pressure Switch should be set to 5 PSI (0.34 bar)

FIELD ADJUSTMENTS:
Alarm Pressure Switch: The operating point of the switch can be

adjusted to any point between 4 PSI (0.27 bar) and 8 PSI (0.55 bar)
by turning the adjustment knob(s) clockwise to raise the actuation
point or counter-clockwise to lower the actuation point.

Air Supervisory Switch: The operating point of the switches can
be adjusted to any point between 10 PSI (0.7 bar) and 60 PSI
(4.1 bar) by turning the adjustment knob(s) clockwise to raise the
actuation point or counter-clockwise to lower the actuation point.

2” MODEL G-2000P PREACTION

Single Interlock

Double Interlock

Figure 3 - Air Supervisory Switch Wiring

The high and low switches are adjusted independently.

Figure 4 - Pressure Adjustment

NOTE: Viking recommends tank-mounted air compressors for Double Interlock Electric/Pneu-Lectric Release Preaction Systems.

2. Nitrogen Cylinder Gas Supply (See Figure 1)
Nitrogen may be used in place of air compressors. Nitrogen is supplied in pressurized cylinders in various sizes and pressures.
Some of the most common are 122 Cu. Ft. at 1,900 PSI (3,455 L at 131 bar), 225 Cu. Ft. at 2,100 PSI (6,372 L at 145 bar), and
280 Cu. Ft. at 2,300 PSI (7,930 L at 159 bar).
When nitrogen cylinders are used as a primary air supply, spare cylinders should be furnished and located at the valve location.
To determine the approximate amount of nitrogen to be furnished, the following formula may be used:

English Units

Vs x P

Vc =

C. Air Supply Installation:

D. Pressure Switch Wiring:

Wire the Alarm Pressure Switch (PS10) and Air Supervisory Switch (PS40), and adjust pressure settings as shown in Figures 2 - 4.

100

Special attention must be given to systems employing a bottled-gas supply. Because only a limited amount of gas is available,
small leaks, which normally would go unnoticed in systems being supplied by mechanical compressors, can become critical to
the system’s overall performance. If the system is to function at temperatures as low as -40 °F (-40 °C), and, if bottled nitrogen
is the gas supply, the system is particularly susceptible to leakage, and special care should be taken to ensure against leaks
throughout the entire system.

1. Install the required air supply as described in section 4.B. The size of the compressor and amount of air required should be

determined in accordance with Tables 1 - 3. The air or nitrogen supply to the preaction system must be clean, dry, and oil free.

2. Automatic air supplies must be regulated, restricted, and from a continuous source. A Viking Air Maintenance Device should

be installed on each system equipped with a tank-mounted compressor, plant air, or nitrogen. For compressors with a capacity
less than 5.5 ft3/min at 10 PSI (0.154 m(0.154 m3/min at 0.69 bar), NFPA 13 does not require an air maintenance device. In addition, NFPA 13 does not require an air maintenance device. In addition,
an air maintenance device should not be used with riser mounted compressors as this can lead to compressor “short cycling”.
Viking recommends that a tank-mounted compressor with air maintenance device be used. This can become critical whenThis can become critical when
accelerators are installed on the system.

Where:

Vc = Volume of Cylinder (ft3)
P = Required Nitrogen Pressure (PSI)
V = Volume of System (gal)

Vc =

Vs x P

108

Metric Units

Where:

Vc = Volume of Cylinder (L)
P = Required Nitrogen Pressure (bar)
V = Volume of System (L)