MSA M1 User manual

MSAsafety.com
Operating Manual
M1 LGDV
Positive Pressure Lung Governed Demand Valve
Order No.: 10190261/00

Schlüsselstrasse 12
8645 Rapperswil-Jona
Switzerland
© MSA 2018 All rights reserved

3
GB
M1 LGDV
Contents
1 Safety Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Correct Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Liability Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Marking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Preparing the Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Connecting the Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Putting the Device into Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 Switching off the Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.5 Removing the Device from Mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.6 Removing the Device from SCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.7 Bypass System (only for M1-AS-B LGDV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 Maintenance Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 Maintenance Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.3 Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.4 Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Technical Data / Approvals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6 Approved System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7 Ordering Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.1 Positive Pressure Lung Governed Demand Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.2 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 11

4
Safety Regulations
GB
M1 LGDV
1 Safety Regulations
1.1 Correct Use
The M1 LGDV, in this manual also referred to as device, is a lung governed demand valve for a
Compressed Air Breathing Apparatus or Compressed Airline Breathing Apparatus. It is connected
between compressed air supply and full face mask and controls the inhaled air.
The M1 lung governed demand valve series is only permitted for specific system components
(exact allocation see chapter 6).
WARNING!
The device is not an independent breathing apparatus. It must be used exclusively mounted on a
full face mask and an SCBA / CABA.
The device is not suitable for underwater diving.
It is imperative that this operating manual be read and observed when using the device. In partic-
ular, the safety instructions, as well as the information for the use and operation of the device,
must be carefully read and observed. Furthermore, the national regulations applicable in the
user's country must be taken into account for a safe use.
WARNING!
This product is supporting life and health. Inappropriate use, maintenance or servicing may affect
the function of the device and thereby seriously compromise the user's life.
Before use, the product operability must be verified. The product must not be used if the function
test is unsuccessful, it is damaged, a competent servicing/maintenance has not been made,
genuine MSA spare parts have not been used.
Alternative use, or use outside this specification will be considered as non-compliance. This also
applies especially to unauthorised alterations to the product and to commissioning work that has
not been carried out by MSA or authorised persons.
1.2 Liability Information
MSA accepts no liability in cases where the device has been used inappropriately or not as
intended. The selection and use of the device are the exclusive responsibility of the individual
operator.
Product liability claims, warranties and guarantees made by MSA with respect to the device are
voided, if it is not used, serviced or maintained in accordance with the instructions in this manual.

5
Safety Regulations
GB
M1 LGDV
1.3 Series
This manual applies to the following lung governed demand valves from the M1 LGDV series:
AS (push to connect / quick connect)
• M1-AS LGDV, short
• M1-AS LGDV, long
• M1-AS LGDV, fix
M45x3 (threaded version)
• M1-AE LGDV M45x3, short
• M1-AE LGDV M45x3, long
• M1-AE LGDV M45x3, fix
ESA (push to connect / quick connect according to DIN 58600)
• M1-ESA LGDV, short
• M1-ESA LGDV, long
AS-B (push to connect / quick connect with Bypass)
• M1-AS-B LGDV, short
• M1-AS-B LGDV, long
Explanations on model designation
AS: Positive pressure, plug-in connection, suitable for full face masks PS-MaXX
AE: Positive pressure, thread connection M45x3 according to DIN EN 148-3, suitable for
full face masks -PF
ESA: Positive pressure, plug-in connection according to DIN 58600, suitable for
full face masks ESA
AS-B: Positive pressure, bypass for constant air flow

6
Description
GB
M1 LGDV
2 Description
2.1 Overview
Fig. 1 Exploded view of all versions
2.2 Marking
1 Flush button 6 Dust cap
2 Cover 7 Medium pressure hose
3 Positive pressure spring 8a Short / long version for coupling
4 Diaphragm 8b Fixed version
5 Valve assembly (inclusive housing) 9 Bypass
1
2
3
4
6
5
7
8a 8b
M1-AS LGDV M1-AE LGDV M1-ESA LGDV M1-AS-B LGDV
9
M1-AS LGDV M1-AE LGDV M1-ESA LGDV
Fig. 2 Marking
1 Type / Part number
2 CE-marking with notified body number (DEKRA EXAM, Zertifizierungsstelle Dinnendahlstr. 9, 44809 Bochum)
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12
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7
Use
GB
M1 LGDV
3Use
3.1 Preparing the Device
WARNING!
The lung governed demand valve may only be put into use in a fully maintained and tested condi-
tion. If malfunctions or defects are noticed prior to use, do not use the lung governed demand
valve under any circumstances. Failure to follow this warning can result in serious personal injury
or death.
Get the apparatus checked and repaired by an authorised service centre.
Switching off the Device
Before connecting the device to medium pressure, in order to prevent accidental air delivery, push
the red operating button to switch off the device.
3.2 Connecting the Device
(1) Insert plug-in nipple of the device into the coupling of the medium pressure hose of an
approved SCBA until it distinctly snaps into place (not for fixed LGDV).
(2) Don full face mask and perform tightness check according to the mask operating manual.
(3) Open cylinder valve(s) fully.
(4) Screw the device into the mask (M1-AE) or insert it into the adapter of the mask until it
distinctly snaps into place (M1-AS, M1-AS-B, M1-ESA).
Support during Donning
MSA recommends that the device must be attached to the mask and the connection inspected by
a second person.
3.3 Putting the Device into Operation
To activate the device, inhale once forcefully or push the flush button.
WARNING!
When using the flush button, the compressed air consumption increases.
3.4 Switching off the Device
To switch off the device, push red operating button until stopper.
3.5 Removing the Device from Mask
For M1-AE:
(1) Switch off the device by pushing the red operating button.
(2) Unscrew handwheel and separate device from the mask.
For M1-AS, M1-AS-B and M1-ESA:
(1) Press both operating buttons simultaneously.
(2) Separate the device from the mask.
In case of an emergency, push the flush button to flush out smoke and gases from the
mask.

8
Use
GB
M1 LGDV
3.6 Removing the Device from SCBA
(1) If necessary, uncouple medium pressure hose (not for fixed LGDV):
Push the plug-in nipple into the coupling of the medium pressure hose forcefully and pull
back the coupling sleeve at the same time.
3.7 Bypass System (only for M1-AS-B LGDV)
A bypass system is available for the M1-AS-B LGDV.
It is a safety system that supplies the user with continuously flowing air independent of the lung
governed demand valve. By turning the red handwheel, the bypass is opened and can be set indi-
vidually.
WARNING!
When using the bypass, the compressed air consumption increases.

9
Maintenance
GB
M1 LGDV
4 Maintenance
4.1 Maintenance Instructions
The product should be regularly checked and serviced by specialists. Inspection and service
records must be maintained. Always use original parts from MSA.
Repairs and maintenance must be carried out by authorised service centres or by MSA. Changes
to devices or components are not permitted and could result in loss of approved status.
Rubber parts are subject to aging and must be inspected and replaced at regular intervals.
4.2 Maintenance Intervals
1) For compressed air breathing apparatus that are frequently used, MSA recommends a complete overhaul after
approx. 540 hours. (This corresponds to 1080 uses with a usage duration of 30 minutes.)
2) Visual test of diaphragm only after use in aggressive media or under extreme conditions like i. e. excessive heat; func-
tion and tightness test always.
4.3 Storage
Always store positive pressure lung governed demand valves when switched off. To do this, push
the red operating button.
Store the device with protective cap attached (see chapter 7). The storage should be in a clean
and dry condition at normal climate free of hazards, protected against direct sunlight and heat.
The storage room must be cool, dry, dust-free and moderately ventilated.
The optimal storage temperature is between +15 °C and 25 °C. The optimal relative humidity is
below 65 %.
4.4 Malfunction
In case of malfunctions, the device must be inspected and if necessary repaired by MSA or trained
service personnel.
MSA recommends the following maintenance intervals. If necessary and considering
the usage, intervals may be shorter than indicated.
Observe national laws and regulations!
In case of doubt, ask your local MSA contact person.
Component Work to be performed After use Annually Every 3
years
Every 10
years1)
M1 LGDV
Cleaning X X
Disinfection X
Sight, function and tight-
ness test X2) X
Diaphragm replacement X
Overhaul X

10
Technical Data / Approvals
GB
M1 LGDV
5 Technical Data / Approvals
6 Approved System Components
ATO = Assemble To Order
Operating pressure : 4 - 9 bar dynamic
Operating temperature : -40 °C to 60 °C
Operating gas : Breathing air according to EN12021 or better
Max. flow bypass (AS-B) : 650 l/min
Transponder : Amplitude modulation: 13.56 MHz, 1024 bit, IP 68
Temperature range: -40 °C up to +70 °C
Approvals The device complies with the Regulation (EU) 2016/425.
0158
EN 137
Lung governed demand valves of the M1 LGDV series are approved as
components of a compressed air breathing apparatus according to
chapter 6 in compliance with EN 137.
DEKRA DEKRA EXAM GmbH, Dinnendahlstr. 9, 44809 Bochum,Germany,
Notified Body number: 0158
II 1G IIC
II 1D IIIC
Compressed air breathing apparatus - Series
M1 ATO
Full face mask - Series
3S
Ultra Elite
G1

11
Ordering Information
GB
M1 LGDV
7 Ordering Information
7.1 Positive Pressure Lung Governed Demand Valves
7.2 Accessories
Description ATO Code
M1-AS LGDV, short LO-BN-CNN-DN-EN-FN-GN-HN-IN-JN-KN-L1-MN-NN-ON-PN
M1-AS LGDV, long LO-BN-CNN-DN-EN-FN-GN-HN-IN-JN-KN-L2-MN-NN-ON-PN
M1-AS LGDV, fix LO-BN-CNN-DN-EN-FN-GN-HN-IN-JN-KN-L3-MN-NN-ON-PN
M1-AE LGDV M45x3, short LO-BN-CNN-DN-EN-FN-GN-HN-IN-JN-KN-L4-MN-NN-ON-PN
M1-AE LGDV M45x3, long LO-BN-CNN-DN-EN-FN-GN-HN-IN-JN-KN-L5-MN-NN-ON-PN
M1-AE LGDV M45x3, fix LO-BN-CNN-DN-EN-FN-GN-HN-IN-JN-KN-L6-MN-NN-ON-PN
M1-ESA LGDV, short LO-BN-CNN-DN-EN-FN-GN-HN-IN-JN-KN-L7-MN-NN-ON-PN
M1-ESA LGDV, long LO-BN-CNN-DN-EN-FN-GN-HN-IN-JN-KN-L8-MN-NN-ON-PN
M1-AS-B LGDV, short LO-BN-CNN-DN-EN-FN-GN-HN-IN-JN-KN-L9-MN-NN-ON-PN
M1-AS-B LGDV, long LO-BN-CNN-DN-EN-FN-GN-HN-IN-JN-KN-L0-MN-NN-ON-PN
Description Part number
Seal cap (protective sleeve for plug-in nipple) (pack of 10) D4080871
Dust cap for AS series 10027738
Dust cap for AE series D0012961
Dust cap for ESA series 10039000

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