ARI VB-060 User manual

General Installation, Operation and
Maintenance Manual for Vacuum Breaker Valves
Table of Contents:
1. Introduction
2. Receiving, handling and storage
3. Description of operation
4. Installation
5. Maintenance

1 Introduction
This manual will provide the information to properly install and maintain the VB-060 vacuum breaker
valve and ensure a long service life. The VB-060 vacuum breaker valves have rugged construction to
provide many years of trouble-free operation.
The VB-060 vacuum breaker valve provides high capacity vacuum protection. When vacuum condition
occurs the valve will intake a full volume of air.
All VB-060 vacuum breaker valves have an optional installation of an additional A.R.I combination type air
valve, threaded or anged, to the side of the valve. This add-on will discharge air during pipeline lling
and release air continuously during pipeline operation.
The special orice design, a combination of stainless steel and E.P.D.M., assures long-term maintenance-
free operation.
The valve size, nominal working pressure, model number, individual serial number and production date
are stamped on the product name plate for future reference.
2 Receiving, Handling & Storage
Inspect vacuum breaker valves upon receipt for damage in shipment. Carefully remove the vacuum
breaker valve from the shipping package.
Unload all vacuum breaker valves carefully on to a sturdy level surface, taking care not to drop them.
The vacuum breakers should be lifted by using the eye bolts (lifting rings) only and not by any other
means (Fig.1)
When the valves are to be stored for some time before being installed, storage should be in the original
delivery crates or cases. Storage should be o the ground in a clean, dry indoor area.
3 Description of Operation
The VB-060 valve is designed to prevent vacuum conditions from occurring in pipelines. After a power
failure or rapid draining of the system, a vacuum condition often occurs in a pipeline.
The pressure dierential between the inside vacuum and the atmosphere will cause a downward force
on the sealing disc. At vacuum pressures greater than 0.02 bar, the vacuum will compress the spring and
move downward, allowing the free ow of air into the pipeline to eliminate vacuum.
When positive pressure is restored in the pipeline, the spring will extend upward, lifting the oat and
sealing the valve tightly.

4 Installation
Lifting Options

1. Recommendation for Riser Dimensions
Air Valve Installation
d=D for D ≤ 300 mm
d=0.6 D for 300 mm < D ≤ 1500 mm
d ≥ 0.35 D for D > 1500 mm
h ≥ D or h=D/2 and h ≥ 150 mm
Ød
h=ØD or D/2
ØD

2. The air valve should be installed in a vertical position.
3. The standpipe should be attached to the crown of the pipe and not from the side of the pipe.
Not Correct
Not Correct
Correct
Correct

4. The standpipe should connect directly to the air valve and must be of an equal or greater diameter
than the air valve.
Not Correct Correct

Correct
5. An isolation valve must be installed to allow for proper maintenance and should be positioned close
to the main pipe.
Not Correct

6. In case of installation in an underground chamber, a vent pipe must be installed with a diameter
equal to or greater than the air valve. The vent outlet must have a mesh screen to prevent entry of
animals or objects.
Not Correct Correct

7. In installations, such as under a road, where the air valve must be displaced to the side, the
connecting pipe after the isolation valve must be on a slight incline. The standpipe at this point can be
connected vertically to the air valve.

5 Maintenance Manual
Vacuum Breakers require no lubrication.
MAINTENANCE: consists of keeping the outlet free from debris on an annual basis.
INSPECTION: Periodic inspection for leakage can be performed by inspecting the top of the valve for
accumulation of uid. If leakage is heard, close the isolation valve, follow instructions for disassembly,
and inspect the sealing surface for wear or mineral deposits. Clean, or repair as needed.
NOTE: The valve does not need to be removed from the pipeline to do maintenance and inspection.
Remove only if leak is detected at the ange connection.
Troubleshooting
Several problems and solutions are presented below to assist you in troubleshooting the valve assembly.
• Valve Leakage: Check gaskets and ange bolts for tightness. Disassemble and inspect sealing surfaces
for debris or damage. If Disc Seal (17) is damaged, then a new seal should be installed.
• Valve Does Not Allow Intake of Air: Verify that seal end drops away from the valve body. Verify that
pipeline is at a vacuum condition greater than minus 0.25 psig. Verify that isolation valve is open and
there is no line blockage downstream. Verify that the Spring (4) is intact. Disassemble and inspect as
necessary.
• All work on the valve should be performed by a skilled mechanic with proper tools.
Disassembly - Refer to Figure 1.
WARNING: The pipeline must be drained and the valve relieved of pressure before commencing
disassembly.
1. Completely unscrew and remove all the cover Bolts, Washers and Nuts (13)
– place them in a secure area.
2. Attach a metal cable through the 2 Lifting Rings and lift the entire Cover Assembly (1-15, 17-18) out
from the valve Body (16).
3. Place the Cover Assembly on a clean at working area.
4. Unscrew the Domed Nuts and Washers (10) and Lifting Rings, lift up and remove the Screen Cover (1)
and Screen (12).
5. Measure and write down (for Reassembly) the distance from the top of the Guide Pin (5) to the top
part of the upper Nut (2).
6. Unscrew the two Nuts from the threaded end of the Guide Pin. Remove the Spring Lock (3) and
Spring (4). Check for wear or cracks on the Spring. Replace the Spring, if necessary.
7. Lift up the remaining Cover Assembly from the Guide Pin(5) and Disc Assembly (7,8 – 17,18) and
place it to the side.
8. Place the Disc and connected Guide Pin on its side. Examine the Disc Seal (17) for wear and tear.
Heavy mineral deposits should be removed using ne sand paper. For replacing the Disc Seal,
continue to Step
9. Unscrew the Disc Bolts (18) and remove the Seal Retainer (7).
10. Replace the Disc Seal, return the Seal Retainer to its place and tighten by screwing the Retainer Bolts
into the Disc.

PARTS LIST AND SPECIFICATION
No Part Material
1. Screen Cover Ductile Iron ASTM A536 65 45 12
2. Nut Stainless Steel SAE 316
3. Spring Lock Stainless Steel SAE 316
4. Spring Stainless Steel SAE 316
5. Guide Pin Stainless Steel SAE 316
6. Cover Bearing Bronze
7. Retainer Stainless Steel SAE 316
8. Disc Ductile Iron ASTM A536 65 45 12
9. Circlip Stainless Steel SAE 316
10. Domed Nut & Washer Stainless Steel SAE 316
11. readed Rod Stainless Steel SAE 316
12. Screen Stainless Steel SAE 316
13. Bolt, Nut & Washer Stainless Steel SAE 316
14. Cover Ductile Iron ASTM A536 65 45 12
15. O-Ring E.P.D.M
16. Body Ductile Iron ASTM A536 65 45 12
17. Rubber Seal E.P.D.M
18. Bolt Stainless Steel SAE 316
A
B
5
4
3
2
1
6
7
8
10
9
11
15
16
17
18
12
13
14
Reassembly
All parts must be clean before reassembly.
1. Place the remaining Cover Assembly on the Disc Assembly (7,8 – 17,18).
2. Place the Spring Lock (3) on to the Guide Pin (5) and screw on the two Nuts (2) until the distance
from the top of the Guide Pin to the upper part of the upper Nut is the same as that measured in
Disassembly Step 5.
3. Place the Screen (12) on the Cover (14), attach the Screen Cover (1) and tighten with the Domed Nuts
and Washers (10).
4. Lift the Cover Assembly (1-15, 17-18) by running a metal cable through the Lifting Rings and lift it
onto the valve Body (16).
5. Tighten the Cover Bolts, Nuts & Washers (13) to the Body using the crossover method with standard
ange bolt torques.
6. Recharge the pipeline and check for leaks.