Viking G-4000P, G-3000P, G-2000P Technical Data Manual

Page 1 of 12

4” MODEL G-4000P

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]

DOUBLE INTERLOCK PREACTION

WITH ELECTRIC/PNEUMATIC RELEASE

1. DESCRIPTION

Viking supervised Double-Interlocked Electric/Pneumatic Release Preaction Systems
utilize the Viking G-4000P Valve.

The small prole, lightweight, pilot operated Viking Model G-4000P Valve comes complete
as shown in Figure 8. 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.

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.

Double interlocked electric / pneumatic release preaction systems require the use of one 24
VDC normally closed (NC) electric solenoid and one pneumatic actuator. The electric sole­noid is connected to a compatible release control panel and compatible detection devices.
The pneumatic actuator is controlled by the air pressure that is contained within the sprinkler
system piping. In re conditions, both the solenoid and a sprinkler must open in order for the
Preaction valve to operate. When both the solenoid and pneumatic actuator open, the prim­ing water is relieved from the internal prime chamber assembly. The prime chamber assem­bly collapses, and water passes through the G-4000P Valve and internal check diaphragm
to the system piping network. The entire sprinkler system lls with water.
Double interlock electric/pneumatic release preaction systems are commonly used in cold
storage applications and other areas where it is important to control accidental water dis­charge due to inadvertent damage to the sprinkler piping.



2. LISTING AND APPROVALS

cULus Listed: VLFT
FM Approved: Refrigerated Area 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):
Model G-4000P Valve: 31.2’
12” Section of Pipe: 1’
Water Supply Control Valve: 15’
Model G-4000P Valve Cv Factor: 341
Valve Color: Black

Material Specifications:

Refer to Figure 11.

Ordering Information:

Available since 2009.
Part Number: Double Interlock Electric/Pneumatic Preaction System Riser Assembly (with
Control Valve and Pressure Switches): 15653-1 (Refer to Figure 8.)

Accessories: (Refer to Figure 9.)

Drain Manifold: 15588
Model E-1 Accelerator: 08055
Model LD-1 Anti-Column Device: 14800

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 12” section of pipe is provided with the G-4000P Double Interlock Electric/Pneumatic Preaction System Riser Assembly.
Prior to G-4000P Valve maintenance, this section of pipe may be removed to provide clearance for lifting the cover from the

Form No. F_112008 18.10.25 P65

Replaces Form No. F_112008 Rev May 28, 2013

Viking Technical Data may be found on

The Web site may include a more recent

Q= C

Q = Flow
Cv = Flow Factor (GPM/1 PSI ∆P)
∆P = Pressure Loss through Valve

S = Specic Gravity of Fluid

The Viking Corporation’s Web site at

http://www.vikinggroupinc.com.

edition of this Technical Data Page.

v

√

(Added P65 Warning.)

∆P

S

Page 2 of 12

4” MODEL G-4000P

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]

DOUBLE INTERLOCK PREACTION

WITH ELECTRIC/PNEUMATIC RELEASE

Form No. F_112008 18.10.25 P65

Figure 1 - Air Supply Options

Page 3 of 12

4” MODEL G-4000P

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]

DOUBLE INTERLOCK PREACTION

WITH ELECTRIC/PNEUMATIC RELEASE

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

Schedule 30 (8”)

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

valve body.

3. The G-4000P Valve must be installed in an area not subject
to freezing temperatures or physical damage. If required,

Schedule 10

Table 2 - Air

Pressure Settings

For Systems with Tank Mounted Compressors:

Air Maintenance Device 30 PSI (2.1 bar) 50 PSI (3.5 bar)

Air Supervisory Switch 25 PSI (1.7 bar) 45 PSI (3.1 bar)

For Systems with Riser Mounted Compressors:

Compressor On/Off

Switch

Air Supervisory Switch 25 PSI (1.72 bar) 45 PSI (3.10 bar)

Up to 175 PSI

30 PSI (2.1 bar)

/ 40 PSI (2.8 bar)

Table 3 - Quick Reference Compressor Size

Compressor

Size (HP)

1/6 1.0 90
1/3 2.0 180
1/2 3.1 300

1 5.9 600

Free Air @

40 PSI (cfm)

System Pressure

(12 bar)

Max System Size to Pump

to 40 psi in 30 Minutes (Gal)

175 PSI (12 bar)

to 250 PSI (17 bar)

50 PSI (2.1 bar) /
60 PSI (2.8 bar)

provide a valve house (enclosure) with adequate heat around
the G-4000P Valve and trim. Freezing temperatures will dam- age the G-4000P Valve. When corrosive atmospheres and/or

contaminated water supplies are present, it is the owner’s responsibility to verify compatibility with the Model G-4000P Valve
and associated equipment.

4. The Viking E-1 Accelerator should be installed at the location indicated in Figure 1 when required.

B. Air Supply Design

1. Air Compressor Size
Viking recommends tank mounted air compressors for Double Interlock Electric/Pneumatic Release Preaction Systems. The pneu­matic actuator requires at least 30 psi (2.1 bar) of air pressure be established within the piping network for systems with water pressure
up to 175 psi (12.1 bar) and 50 psi (3.45 bar) of air pressure for systems with water pressures up to 250 psi (17.2 bar).

NFPA 13 requires the air supply to be capable of lling 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

Therefore, the compressor shall be capable of providing 7 cfm.

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 Ltrs. at 131 bar), 225 Cu. Ft. at 2,100 PSI (6,372 Ltrs. at 145 bar), and 280
Cu. Ft. at 2,300 PSI (7,930 Ltrs. 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

Where:

Vc= Volume of Cylinder (ft3)
P = Required Nitrogen Pressure (psig)

Vc =

Vs x P

100

V = Volume of System (gal)

Form No. F_112008 18.10.25 P65

Where:

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

7.48 = gal. / ft.

3

14.7 = atmospheric pressure

Example:

System volume as determined by table 1 = 750 gallons
Required Air pressure = 30 psi

Compressor Size (cfm) =

(750 x 30)

7.48 x 14.7 x 30

Metric Units

Where:

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

Vc =

Vs x P

108

V = Volume of System (L)

= 6.8 cfm

Page 4 of 12

4” MODEL G-4000P

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]

DOUBLE INTERLOCK PREACTION

WITH ELECTRIC/PNEUMATIC RELEASE

Figure 2 - Alarm Pressure Switch Wiring

(Alarm Pressure Switch should be set to 5 psi)

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.
The high and low switches are adjusted independently.

Figure 3 - Air Supervisory Switch Wiring

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.

C. Air Supply Installation

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, 2 & 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 psig (0.154 m3/min at 0.69 bar), NFPA 13 does not require an air maintenance device. The use of
an air maintenance device with riser mounted compressors can lead to compressor “short cycling”. Viking always recom­mends that a tank mounted compressor with air maintenance device be used. This can become critical when accelerators
are installed on the system.

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.

E. Hydrostatic Test:

The Preaction System, including Sprinkler Piping and Sprinklers shall be hydrostatically tested at 200 psi (13.79 bar) and maintained
for 2 hours, in accordance with NFPA 13. Systems normally subjected to working system pressures in excess of 150 psi (10.34 bar)
shall be tested at a pressure of 50 psi (3.45 bar) in excess of system working pressure.
F. Placing the Valve in Service: (Refer to Figure 5)
When the Preaction System is ready to be placed in service, verify that the pneumatic release system is in a normal condition and
that the electric release system has been reset.

1. Verify that the water supply main control valve supplying the G-4000P Valve is closed.

2. Close the prime valve.

3. Open the main drain valve.

4. Open the flow test valve.

Figure 4 - Pressure Adjustment

Form No. F_112008 18.10.25 P65