TLV VB3 Manual de usuario

172-65471MA-06 (VB3/VB3-H) 1 October 2021

Vacuum Breaker

VB3/VB3-H

172-65471MA-06 (VB3/VB3-H) 1 Oct 2021

Contents

Introduction ....................................................................... 1

Safety Considerations....................................................... 2

Features............................................................................ 4

Operation .......................................................................... 4

Specifications.................................................................... 5

Configuration..................................................................... 5

Installation......................................................................... 6

Maintenance...................................................................... 8

Disassembly/Reassembly................................................. 9

Troubleshooting .............................................................. 12

TLV EXPRESS LIMITED WARRANTY........................... 13

Service ............................................................................ 15

Introduction

Thank you for purchasing the TLV VB3/VB3-H vacuum breaker.

This product has been thoroughly inspected before being shipped from the factory.

When the product is delivered, before doing anything else, check the specifications

and external appearance to make sure nothing is out of the ordinary. Also be sure to

read this manual carefully before use and follow the instructions to be sure of using

the product properly.

The VB3/VB3-H vacuum breaker automatically opens both of its valves to introduce

air when a vacuum begins to form due to a stopped supply pump, protecting piping

and other equipment by preventing a vacuum from forming. On startup, the float of

the VB3/VB3-H allows for rapid air discharge until the water level rises and the float

shuts off the valve.

If detailed instructions for special order specifications or options not contained in this

manual are required, please contact TLV for full details.

This instruction manual is intended for use with the model(s) listed on the front cover.

It is necessary not only for installation but for subsequent maintenance, disassembly/

reassembly and troubleshooting. Please keep it in a safe place for future reference.

172-65471MA-06 (VB3/VB3-H) 1 Oct 2021

Safety Considerations

Read this section carefully before use and be sure to follow the instructions.

Installation, inspection, maintenance, repairs, disassembly, adjustment and valve

opening/closing should be carried out only by trained maintenance personnel.

The precautions listed in this manual are designed to ensure safety and prevent

equipment damage and personal injury. For situations that may occur as a result

of erroneous handling, three different types of cautionary items are used to

indicate the degree of urgency and the scale of potential damage and danger:

DANGER, WARNING and CAUTION.

The three types of cautionary items above are very important for safety: be sure

to observe all of them as they relate to installation, use, maintenance, and repair.

Furthermore, TLV accepts no responsibility for any accidents or damage

occurring as a result of failure to observe these precautions.

Symbols

Indicates a DANGER, WARNING or CAUTION item.

DANGER

Indicates an urgent situation which poses a threat of death or

serious injury

WARNING

Indicates that there is a potential threat of death or serious injury

CAUTION

Indicates that there is a possibility of injury or equipment/product

damage

WARNING

DO NOT use for toxic, flammable or otherwise hazardous

fluids.

This product is a vacuum breaker for water piping systems. Use

only for water and/or air. This product is for intended use only.

Improper use may result in such hazards as damage to the product

or malfunctions that may lead to serious accidents.

NEVER apply direct heat to the float.

The float may explode due to increased internal pressure, causing

accidents leading to serious injury or damage to property and

equipment.

CAUTION

Install properly and DO NOT use this product outside the

recommended operating pressure, temperature and other

specification ranges.

Improper use may result in such hazards as damage to the product

or malfunctions that may lead to serious accidents. Local

regulations may restrict the use of this product to below the

conditions quoted.

Use hoisting equipment for heavy objects (weighing

approximately 20 kg (44 lb) or more).

Failure to do so may result in back strain or other injury if the

object should fall.

Continued on the next page

172-65471MA-06 (VB3/VB3-H) 1 Oct 2021

CAUTION

Take measures to prevent people from coming into direct

contact with product outlets.

Failure to do so may result in burns or other injury from the

discharge of fluids.

When disassembling or removing the product, wait until the

internal pressure equals atmospheric pressure and the

surface of the product has cooled to room temperature.

Disassembling or removing the product when it is hot or under

pressure may lead to discharge of fluids, causing burns, other

injuries or damage.

Be sure to use only the recommended components when

repairing the product, and NEVER attempt to modify the

product in any way.

Failure to observe these precautions may result in damage to the

product and burns or other injury due to malfunction or the

discharge of fluids.

Do not use excessive force when connecting threaded pipes

to the product.

Over-tightening may cause breakage leading to fluid discharge,

which may cause burns or other injury.

Use only under conditions in which no freeze-up will occur.

Freezing may damage the product, leading to fluid discharge, which

may cause burns or other injury.

Use only under conditions in which no water hammer will

occur.

The impact of water hammer may damage the product, leading to

fluid discharge, which may cause burns or other injury.

172-65471MA-06 (VB3/VB3-H) 1 Oct 2021

Features

1. The product has no hinges or levers: the only moving parts are the check valve

disc and the self-leveling grounded free float, which minimize malfunction and

provides long service life.

2. The product is made up of few parts and the construction has been kept simple,

so maintenance checks are also simple.

Operation

Take measures to prevent people from coming into direct contact with

product outlets. Failure to do so may result in burns or other injury from

the discharge of fluids.

CAUTION

1. The product also functions as a rapid initial air

vent. As water is initially supplied to the piping,

the air in the piping enters the vacuum

breaker. As the float is in the lowered position

at this time, valve “A” is open fully, and the air

entering the vacuum breaker is rapidly

discharged. At this time check valve disc “B”at

the check valve stays closed.

2. When the last of the initial air is discharged,

water enters the product, causing the float to

rise, closing valve “A”. If there is a rapid rise in

water level, a small amount of water may leak

with discharged air immediately before valve

“A”closes.

3. Once valve “A” has closed, it remains closed

even if air accumulates inside the vacuum

breaker, so there is no discharge of air during

operation.

Check valve disc “B”remains closed.

4. When stopping the supply pump and draining

the piping, the pressure inside the piping

becomes near to or less than atmospheric

pressure, and the float falls with the water level

in the vacuum breaker opening valve “A”and

introducing air.

At the same time, check valve disc “B”opens

and introduces air into the piping, which

prevents a vacuum from forming and protects

the piping and other equipment.

172-65471MA-06 (VB3/VB3-H) 1 Oct 2021

Specifications

DO NOT use for toxic, flammable or otherwise hazardous fluids.

This product is a vacuum breaker for water piping systems. Use only for

water and/or air. This product is for intended use only. Improper use may

result in such hazards as damage to the product or malfunctions that

may lead to serious accidents.

WARNING

Install properly and DO NOT use this product outside the recommended

operating pressure, temperature and other specification ranges.

Improper use may result in such hazards as damage to the product or

malfunctions which may lead to serious accidents. Local regulations

may restrict the use of this product to below the conditions quoted.

CAUTION

Use only under conditions in which no freeze-up will occur. Freezing

may damage the product, leading to fluid discharge, which may cause

burns or other injury.

CAUTION

Refer to the product nameplate for detailed specifications.

Model

Production Lot No.

Maximum Allowable

Temperature (TMA)*

Maximum Operating

Temperature (TMO)

Nominal Diameter

Maximum Allowable

Pressure*

Maximum Operating

Pressure

Valve No.**

* Maximum allowable pressure (PMA) and maximum allowable temperature (TMA) are

PRESSURE SHELL DESIGN CONDITIONS, NOT OPERATING CONDITIONS.

** Valve No. is displayed for products with options. This item is omitted from the nameplate

when there are no options.

Configuration

Air Intake/Discharge Port

Air Intake Port Main Connection

No.

Part Name

No.

Part Name

No.

Part Name

Body

Set Screw

Check Valve Seat

Cover

Float Guide

Check Valve Inner Gasket

Float

Nameplate

Check Valve Outer Gasket

Cover Gasket

Check Valve Body

Intake Pipe

Cover Bolt

Spring Holder

Intake Pipe Bolt

Valve Seat

Coil Spring

Intake Pipe Nut

Valve Seat Retainer

Check Valve Disc

Ring*

* Ring featured only in VB3-H, not in VB3.

172-65471MA-06 (VB3/VB3-H) 1 Oct 2021

Installation

DO NOT use for toxic, flammable or otherwise hazardous fluids.

This product is a vacuum breaker for water piping systems. Use only for

water and/or air. This product is for intended use only. Improper use may

result in such hazards as damage to the product or malfunctions that

may lead to serious accidents.

WARNING

Install properly and DO NOT use this product outside the recommended

operating pressure, temperature and other specification ranges.

Improper use may result in such hazards as damage to the product or

malfunctions which may lead to serious accidents. Local regulations

may restrict the use of this product to below the conditions quoted.

CAUTION

Use hoisting equipment for heavy objects (weighing approximately

20 kg (44 lb) or more). Failure to do so may result in back strain or other

injury if the object should fall.

CAUTION

Take measures to prevent people from coming into direct contact with

product outlets. Failure to do so may result in burns or other injury from

the discharge of fluids.

CAUTION

Do not use excessive force when connecting threaded pipes to the

product. Over-tightening may cause breakage leading to fluid

discharge, which may cause burns or other injury.

CAUTION

Installation, inspection, maintenance, repairs, disassembly, adjustment and valve

opening/closing should be carried out only by trained maintenance personnel.

1. Before installation, be sure to remove all protective seals.

2. Before installing the product, blow out the piping connected to the main

connection to remove any piping scraps, dirt, sand or oil, etc.

3. Install the product at a point where air is likely to collect such as a bend in the

piping.

4. This product must be installed vertically with the main connection at the bottom,

and both the air intake/discharge port and air intake port must face downwards.

Also it should be inclined horizontally and front-to-back within the limits shown in

Figure 1.

5. Install piping on both the air intake/discharge port and air intake port leading to a

drainage vessel or ditch. Make sure the ends of the pipes connected to the air

intake port and air intake/discharge port are above the waterline, so that dirt and

water cannot be sucked up by a vacuum when the system shuts down (Figure 2).

Figure 1

Figure 2

Tolerance angles for installation: 5°

Safe installation for air intake/discharge

port and air intake port

Make sure the product is installed with the

raised TLV lettering on the body horizontal

Make sure the end

of pipe is above

the waterline

172-65471MA-06 (VB3/VB3-H) 1 Oct 2021

6. For the piping connected to the main connection, piping with no horizontal

portion is recommended for water/air displacement. If there is a horizontal

portion, make the pipe diameter of the horizontal portion larger than the vertical

portion or make the horizontal portion as short as possible.

7. Make sure the main connection piping diameter is at least as large as the

diameter of the main connection.

8. Installation of an isolation valve just before the product’s main connection is

recommended as it enables maintenance during operation. A full-bore ball

valve is recommended.

9. Make sure to take measures to prevent foreign matter from flowing into the

product.

10. This product does not vent air automatically while the supply pump is in

operation. If air venting is necessary during system operation, install an

automatic air vent as well.

If there is a problem, determine the cause using the “Troubleshooting” section in

this manual.

172-65471MA-06 (VB3/VB3-H) 1 Oct 2021

Maintenance

Take measures to prevent people from coming into direct contact with

product outlets. Failure to do so may result in burns or other injury from

the discharge of fluids.

CAUTION

Be sure to use only the recommended components when repairing the

product, and NEVER attempt to modify the product in any way. Failure to

observe these precautions may result in damage to the product or burns

or other injury due to malfunction or the discharge of fluids.

CAUTION

Operational Check

A visual inspection of the following items should be done on a daily basis to

determine whether the product is operating properly or has failed.

If the product should fail, it may cause water leakage, hindrance to water flow, or

damage to equipment and piping as a result of vacuum formation.

Normal:

When air flows into the product initially, the air intake/discharge port

opens and the air is discharged.

When water flows into the product, the air intake/discharge port

closes, and no water leaks from either the air intake/discharge port or

the air intake port. When there is a vacuum in the piping, the air

intake/discharge port and air intake port open and air enters the

product.

Leakage:

Water is leaking from the air intake/discharge port or the air intake

port when the ports are in the closed position.

Parts Inspection

When parts have been removed, or during periodic inspections, use the following

table to inspect the parts and replace any that are found to be defective.

Procedure

Gaskets:

Check for warping and damage

Valve Seats:

Check for damage, scratches, or wear on sealing surface

Float:

Check for scratches or dents

Float Guide:

Check for warping

Check Valve Disc:

Check for scratches, dents, or wear

Coil Spring:

Check for scratches, dents, or cracks

Spring Holder:

Check for warping, scratches, or wear

172-65471MA-06 (VB3/VB3-H) 1 Oct 2021

Disassembly/Reassembly

NEVER apply direct heat to the float. The float may explode due to

increased internal pressure, causing accidents leading to serious injury

or damage to property and equipment.

WARNING

Use hoisting equipment for heavy objects (weighing approximately

20 kg (44 lb) or more). Failure to do so may result in back strain or other

injury if the object should fall.

CAUTION

When disassembling or removing the product, wait until the internal

pressure equals atmospheric pressure and the surface of the product

has cooled to room temperature. Disassembling or removing the

product when it is hot or under pressure may lead to discharge of fluids,

causing burns, other injuries or damage.

CAUTION

Be sure to use only the recommended components when repairing the

product, and NEVER attempt to modify the product in any way. Failure to

observe these precautions may result in damage to the product or burns

or other injury due to malfunction or the discharge of fluids.

CAUTION

Use the following procedures to remove components. Use the same procedures in

reverse to reassemble.

(Installation, inspection, maintenance, repairs, disassembly, adjustment and valve

opening/closing should be carried out only by trained maintenance personnel.)

Dissassembly/Reassembly Procedure

Part

During Disassembly

During Reassembly

Cover Bolt

Remove with a socket wrench

Consult the table of tightening

torques and tighten to the proper

torque

Cover

Remove by lifting up and off

Make sure there are no pieces of

the old gasket left on the sealing

surfaces and reattach

Cover Gasket

(rubber)

Remove the gasket and clean

sealing surfaces

Replace with a new gasket

Valve Seat Retainer

Loosen set screws and remove

from the cover

Consult the table of tightening

torques for the set screws and

tighten to the proper torque

Valve Seat

Remove from the cover together

with the valve seat retainer

Clean or replace with a new valve

seat if warped or damaged

Float

Remove, being careful not to

scratch the polished surface

Insert, being careful not to scratch

the polished surface

Float Guide

Remove, being careful not to

misshape

Insert, being careful not to

misshape

Intake Pipe Nut

Remove with a wrench

Consult the table of tightening

torques and tighten to the proper

torque

Intake Pipe

Pull out to remove (Be careful, the

check valve sets can be removed

together; do not drop any parts)

Make sure there are no pieces of

the old gasket left on the sealing

surfaces and reattach

Continued on the next page

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