Warden® AST Overfill Prevention Device

Warden® AST Overfill Prevention Device
Installation Instructions
Warning
Failure to follow instructions or substitution of parts other than those supplied by EBW, may cause failure of
the device which may create a hazardous condition and/or environmental damage. Check to make sure all parts
have been provided before starting installation.
Warning
EBW products should be used in compliance with applicable federal, state, and local laws and regulations.
When no other regulations apply, follow NFPA codes 30, 30A and 70 from the National Fire Protection Association. Product selection should be based on physical specifications and limitations and compatibility with the
environment and material to be handled. EBW makes no warranty or fitness for a particular use.
Warning
In order to prevent product spillage from the above-ground storage tank (AST), properly maintained delivery
equipment and a proper tight fill connection are essential. Failure to properly connect the delivery hose or
disconnecting a pressurized line, will cause a hazardous spill which may result in personal injury, property
damage, fire, explosion and/or environmental contamination.
Note: Shutoff points are influenced by the specific gravity of
stored liquids. This valve was designed to be used as an
emergency overfill prevention device only!
Table 1: Product Specifications
Note: The Warden AST Overfill Prevention Device is used on
Aboveground Storage Tanks (AST) to stop the inflow when
the tank level reaches a predetermined point.
Valve Body
Poppet
Shaft
Float
Nipple
Aluminum 356-T6
Aluminum 356-T6
Stainless Steel
High Density Polyethylene
Epoxy coated black iron pipe
Working Pressure Rating
Flow Rate 200 gpm
Minimum Flow Rate
100 psi
@ 20 psi
No Minimum
Note: The Warden is recommended for use with clean product
only. Contaminated product may cause erratic operation or
valve failure.
Packing List
• (1) Screw clamp
• (1) Cam lock adapter
• (1) Valve to riser adapter
assembly
• (1) Warning plate
• (1) Valve assembly
• (1) Instruction manual
Tools Needed for Installation and Assembly
• Tape measure
• (2) Pipe wrenches
• ⅛” Hex key
• Fuel resistant thread
sealant
• Permanent marker
• Hacksaw
• Petroleum jelly
To Be Supplied By Installer
• 2" schedule 40 black iron
pipe to make upper and
lower pipe nipples (cut to
length and threaded per
instructions).
Construction
Flow Rate
Size
Height of Unit
27 ⅜"
Compatible Fill Riser
4" Fill Riser
Note: This overfill prevention device incorporates a pressure
relief feature that allows for pressure decay before the
nozzle or hose disconnects.
Warning
If the hose is disconnected when
pressurized, it may cause a hazardous
spill. Allow pressure to bleed off before
disconnecting.
Direct Fill Configuration
Remote Fill Configuration
Shutoff Point Mark
(Instructions step 6)
Cam & Groove Adaptor
Riser adaptor assembly
From remote fill box
Top of riser
A
Set-screws
Top of inside
of tank
Start of thread
of flange or
bushing
Y
X
Flange or bushing
A
Top of
inside of
tank
Y
B
B
90 % Tank full
Upper pipe
coupling
Upper pipe coupling
C
6" Max (or per local
requirements)
Z
≈ 45º
Installation
Bottom of tank
1. Obtain dimensions A, B, & C by measuring the tank
configuration (direct fill or remote fill) and write down the
values in the measurements table below.
2. Calculate X, Y, & Z (direct fill) or X & Z (remote fill). Write down
the values in the appropriate calculations table.
3. Cut the upper pipe nipple to length and thread both ends.
4. Cut the lower pipe nipple to length, with the upper end straight, and
the lower end at a 45 degree angle. Thread the upper end only.
5. Apply fuel resistant pipe sealant to one end of the upper pipe
nipple and thread it into the upper pipe coupling.
Steps 6 through 9 apply to direct fill installation
6. Move the float assembly to the full up position. Measure from the
center joint on the floats and mark the shutoff point on the upper
pipe nipple with a permanent marker. The mark will set the valve
assembly in position for shutoff at 90% of tank capacity.
7. Apply petroleum jelly generously to the O-ring in the riser
adapter assembly and slide the assembly onto the upper nipple.
8. Align the top edge of the riser adapter assembly with the shutoff mark (from step 6) and secure in place by tightening the (3)
¼-20 set screws with a ⅛" hex key.
9. Apply fuel resistant pipe sealant to the threads of the upper
nipple, and thread on the cam and groove adapter.
10. Apply fuel resistant pipe sealant to the threads of the lower pipe
nipple and assemble it to the lower valve body.
©2011 FFS EBW F-6274 Rev. 2
(in feet)
Approx.
Dimension B for
90% Shutoff
4
5
6
7
8
9
10
12
8
9¼
11½
13½
15
15½
19
22
Tank
Diameter
Note: This chart shows an
approximate shutoff point
for 90% capacity of round
tanks. Using other tank
shapes requires using the
manufacturer’s chart to
obtain Dimension B.
(in inches)
11. Check the tank riser pipe inside diameter for any burrs,
improper reaming, or foreign material. Failure to do so may
damage or prevent the valve from functioning. Properly apply
fuel resistant pipe sealant to the riser pipe threads.
12. Stand the valve assembly upright and operate the float assembly to make sure that no damage was caused during assembly.
13. Carefully lower the complete valve assembly down the riser
pipe. Do not force the valve down the riser pipe. If the valve
does not fit, the riser pipe will have to be cleaned or deburred
before inserting the valve.
15. Thread the adapter and valve assembly to the riser pipe and
secure it.
Measurements
A
Top of riser to top of inside of tank
B
Top of inside of tank to 90% full
C
Top of riser to bottom of the tank
Calculations (Direct Fill)
X = A+B+5
Shutoff point length
Y = X– 5
Upper pipe nipple length
Z = C – Y-24 ⅜
Lower pipe nipple length
Calculations (Remote Fill)
Y = A+B – 3
Upper pipe nipple length
Z = C-Y–27 ⅜
Lower pipe nipple length

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