MGF M29 7JT Bypass Pipe Stopper User Guide

Table of Contents

MGF M29 7JT Bypass Pipe Stopper-PRODUCT

For the use of MGF-supplied equipment only.
Ensure potential users are fully trained in the operation of this equipment and a site-specific safe system of work is in place and adhered to.
It is essential that site-specific risk assessments are undertaken.
If in doubt concerning the integrity of any part of the equipment DO NOT USE IT.
Ensure the correct stopper has been supplied for the size of the pipe, an over-stretched stopper can burst.
Before using a stopper, it is necessary to establish the maximum back pressure it will need to withstand. Back pressure can be very high as seen from the table below:

MGF EXAMINATION AND TESTING

Upon return to MGF the equipment will be cleaned, inspected and function tested by a competent and trained MGF safety technician

VISUAL INSPECTION/FUNCTIONAL TEST – PRIOR TO USE

Before the start of each use ensure that the equipment is clean and free from debris and there are no obvious defects.
Ensure that the item has a green tag, stating when it was last inspected.
Each item comes with a unique ID number, please ensure this can be found.

You have been supplied with a durable expandable pipe stopper designed to be inflated in a round pipe and, when suitable braced, to withstand a maximum back pressure of 0.5 bar.
Bauer couplings allow rigid or lay flat hose to be connected to the stopper, taking the flow above ground via a pump or by gravity through the area of work.
You have also been supplied with:
- A hand pump or 12V compressor
- A pressure relief valve (max pressure 1.5 bar)
- Red 10m inflation line with male/female couplings
- Compressor controller
- Red 10m inflation line with male/female couplings
It is also possible to inflate a stopper from an air cylinder.

SIZE RANGE

Before installation of a stopper the internal surface of the pipe should be cleaned of all debris from the area where the stopper will be situated.
Make sure there are no protrusions that could damage the stopper.
It is advisable that a small security line should be attached to the stopper and tied off to prevent the possible loss of the stopper during deflation.
Before use, check diameter of the pipe to make sure it does not exceed the maximum diameter of the stopper.
NEVER – Inflate stoppers over sharp protrusions
ALWAYS – Clean area of pipe to receive stopper
ALWAYS – Check the diameter of the pipe before use, to ensure it does not exceed the maximum diameter of the stopper

The compressor controller is equipped with a standard claw coupling that will fit into any building site compressor line.
It contains a safety relief valve to eliminate the possibility of over inflation of the stopper.
1. Connect air supply to claw (A).
2. Connect male coupling (B) to the female coupling on the red inflation line.
3. Connect the male coupling on the red inflation line to the female coupling on the pipe stopper.
4. Gently depress the control lever (C) until the stopper is inflated. The pressure gauge will indicate the internal pressure of the stopper. If the maximum inflation pressure is exceeded the pressure relief valve will activate, release the control lever immediately in this situation.
5. Once the stopper has been inflated remove the red inflation line.
WARNING – Over-inflated stoppers can burst, potentially causing serious accidents

Connect the male coupling on the hand pump or compressor hose to the female coupling on the pressure relief valve (A).
Connect the female coupling on the red inflation line to the male coupling on the pressure relief valve (B).
Connect the male coupling on the red inflation line to the female coupling on the pipe stopper.
Inflate the stopper using the 12V Compressor or Hand Pump, the pressure relief valve will activate at 1.5 bar.
Once the stopper has been inflated remove the red inflation line.
- ALWAYS – Use the MGF-supplied pressure relief valve
- WARNING – Over-inflated stoppers can burst, potentially causing serious accidents

BRACING

WARNING – All stoppers must be braced, failure to do so could result in damage, serious injury or death

WATER TESTING

Bypass stopper may be used to conduct water tests, please contact MGF for more details.

If the stopper is retaining a head of water or pressure or air it is essential to release the pressure prior to deflation.
If this is not possible it is imperative that the stopper is securely braced or fastened in place to prevent it becoming dislodged during deflation.
When securing the stopper never rely on the inflation hose as a means of securing it, instead use a chain or rope fastened to the tug ring/eyebolt of the stopper.
NEVER – Lift a stopper using the inflation hose

Failure to adhere to the instructions provided with the equipment may invalidate any claims with respect to damage, death or injury due to misuse or malfunctioning of the apparatus.

WARNING

ALWAYS – Use the MGF-supplied pressure relief valve or compressor controller
ALWAYS – Clean area of pipe to receive stopper
ALWAYS – Check valves do not leak using soapy water
ALWAYS – Store stoppers out of direct sunlight
ALWAYS – Check the diameter of the pipe before use, to ensure it does not exceed the maximum diameter of the stopper
NEVER – Inflate stoppers over sharp protrusions
NEVER – Lift the stopper using the inflation hose
WARNING – Over-inflated stoppers can burst, potentially causing serious accidents.
WARNING – All stoppers must be braced, failure to do so could result in damage, serious injury or death.