Respirex SIMH024 User manual

BS\105 Iss D
SUPPLIED-AIR RESPIRATOR
INSTRUCTION MANUAL
TYPE C CONTINUOUS-FLOW CLASS
NIOSH APPROVAL NO. TC-19C-327
READ ALL INSTRUCTIONS AND WARNINGS BEFORE USE
MODEL SIMH024(Drawstring Neck Seal) MODEL SIMH036(Drawstring Neck Seal)
MODEL SIMH055(Under Collar Neck Seal) MODEL SIMH056(Under Collar Neck Seal)
MODEL SIMH057(Drawstring Neck Seal)
MODEL SIMH058(Under Collar Neck Seal)

Contents
Special or Critical User’s Instructions ........................................................................2
General Information........................................................................................................3
Component Concept ......................................................................................................4
Supplied-Air Respirator Part N° Specication ........................................................5
Warnings..............................................................................................................................6
Operations ..........................................................................................................................8
Pre-checking The Supplied-Air Respirator ........................................................... 10
Donning The Supplied-Air Respirator.................................................................... 11
Dong The Supplied-Air Respirator ...................................................................... 13
Inspection & Replacement Of Component Parts............................................... 14
Removing And Re-Fitting The Control Waist Belt.............................................. 14
Replacing The Silencer ................................................................................................ 15
Replacing The Removable Visor (Rigid Visor Models Only)............................ 16
Replacing Exhalation Valve Diaphragm ................................................................ 16
Replacing Exhalation Valve Assembly.................................................................... 18
Fitting Approved Quick Connect Couplings Onto The Air Line Hoses....... 19
Cleaning............................................................................................................................ 19
Storage.............................................................................................................................. 19
Spare Parts & Accessories For Respirex Supplied-Air Respirators................ 20
Couplings & Nipples For Air Supply Hoses........................................................... 22
Returning Goods For Repair...................................................................................... 23

1
RESPIREX INTERNATIONAL LIMITED,
Unit F Kingseld Business Centre, Philanthropic Road,
Redhill, Surrey. RH1 4DP ENGLAND
Tel : [phone] Fax : [phone]
TYPE ‘C’ CONTINUOUS FLOW SUPPLIED-AIR RESPIRATOR
THESE RESPIRATORS ARE APPROVED ONLY IN THE FOLLOWING CONFIGURATIONS
1. Protection - SA = Supplied-Air, CF = Continuous Flow 2. Cautions & Limitations A- Not for use in atmospheres containing less than 19.5 percent oxygen. B - Not for use in atmospheres immediately dangerous to life or health. C - Do not exceed maximum use concentrations established by regulatory standards. D - Air-line respirators can be used only when the respirators are supplied with respirable air meeting the requirements of CGA G-7.1 Grade D or higher quality.
E - Use only the pressure ranges and hose lengths specied in the instruction manual. J - Failure to properly use and maintain this product could result in injury or death. M - All approved respirators shall be selected, tted, used and maintained in accordancd with OSHA and other applicable regulations. N - Never substitute, modify, add or omit parts. Use only exact replacement parts in the conguration as specied by the manufacturer. O - Refer to user’s instructions and/or maintenance manuals for information on use and maintenance of these respirators. S - Special or critical User’s Instructions and/or specic use limitations apply. Refer to User’s Instructions before donning.
RESPIRATOR COMPONENTS
TC#
1. Protection
Alternate Respirator Hoods
Alternate Flow
Regulator &
Belt
Alternate Quick Disconnects Alternate Hoses/Lengths
2. Limitations &
Cautions
SIMH024
SIMH036
SIMH055
SIMH056
SIMH057
SIMH058
G00121
G00115
D01134
D01135
D01136
D01137
D01138
D01139
D01140
D01141
10’ 25’ 50’ 100’
50’
Retractable
Hose Reel
G00316/10
G00316/25
G00316/50
G00316/100
G00314
19C-327 SA/CF X X X X X X X X X X X X X X X X X X X X X A,B,C,D,E,J,M,N,O,S

Special or Critical User’s Instructions
Breathing Air Pressure Table
The table outlines the pressure range achieved using 3/8” bore hose in dierent lengths tted with Male &
Female couplings. The gauge readings shown are with the air owing through the garment.
Blouse
Model (Part
No.)
Air Supply
Hose (Part
No.)
Air Supply
Hose Length
(Feet)
Number
Of Hose
Sections
Required Pressure
Range (psig air)
SIMH024
SIMH036
SIMH055
SIMH056
SIMH057
SIMH058
G00316/10
G00316/25
G00316/50
G00316/100
10
25
50
50
75
100
100
100
150
200
300
1
1
1
2
3
1
2
4
3
2
3
12-15
13-18
15-20
16-22
19-26
17-24
19-26
22-29
23-31
24-32
29-39
50ft Retractable Hose Reel,
G00314 50 16-22
2

3
General Information
Respirex Supplied-Air Respirators, when properly used, provide a continuous ow of air from a remote air
source, to the wearer. Respirex Supplied-Air Respirators oer protection from airborne contaminants that
are not immediately dangerous to life or health (IDLH). Consult OSHA, EPA, NIOSH or ACGIH regulations
and recommendations before use.
Respirex Supplied-Air Respirators are approved by NIOSH (advise) Type C to provide respirator protection
in general purpose applications including pharmaceutical manufacturing, chemical and pesticide
handling, tank cleaning, spray painting and other industrial or agricultural applications in which hazardous
compounds are present.
Respirex Supplied-Air Respirators are compatible with breathing air compressors.
Respirex also supply airline hose and ttings to connect the respirator to the breathing air source.

Top window
Hanging loop
Waist belt
Wide vision
visor
Front cape
Belt loop
Connection to breathing
air tubes
Silencer
Back pad
Exhalation valves
Hanging loop
Back cape
WARNING
Failure to use complete NIOSH approved Respirex components and replacement
parts voids approval of entire assembly.
Clean Breathable
Air Source
Supplying Grade 'D'
or Higher Air Quality
(see Breathing Air
Requirements on
Pages 8 & 9)
Note :eventhoughthe
respirator pictured has a
rigid visor, the component
concept will be the same for
models with a totally clear
blouse.
Component Concept
4

Supplied-Air Respirator Part N° Specication
Respirex Supplied-Air Respirators are available in four dierent styles and materials (Note : rigid visor
models manufactured from PVC are supplied with a clear panel in the top of the blouse. This feature is not
available on rigid visor models manufactured from either Neoprene or Butyl).
Material Of
Construction
Rigid Visor with
Drawstring
Neck Seal
Total Clear
hood with
Drawstring
Neck Seal
Rigid Visor
with Under
Collar Neck
Seal
Total Clear
hood with
Under Collar
Neck Seal
Anti-Static
Green PVC SIMH036/73 SIMH024/73 SIMH056/73 S IMH055/73
Heavy-Weight
Yellow PVC SIMH036/37 SIMH024/37 SIMH056/37 SIMH055/37
Yellow
Neoprene SIMH057/17 SIMH024/17 SIMH058/17 SIMH055/17
Olive Butyl SIMH057/27 SIMH024/27 SIMH058/27 SIMH055/27
All the above Supplied-Air Respirators come complete with Air Control Waist Belt, either Part No. G00121
or G00115.
5

6
Warnings
1. This respirator, when properly tted and used, signicantly reduces, but does not completely
eliminate, the breathing of contaminants by the respirator wearer. You may obtain better respiratory
protection from other types of respiratory protection equipment such as a valve operated pressure-
demand airline respirator or a pressure-demand self-contained breathing apparatus respirator.
2. Before using this respirator, be sure your employer has determined that airborne contaminant
concentrations do not exceed those allowed by applicable OSHA, EPA, NIOSH or ACGIH regulations
and recommendations for continuous-ow supplied-air respirators. Federal law requires that your
employer measure and monitor airborne contaminant levels in the work area.
3. Improper respirator use may damage your health and/or cause your death. Improper use may also
cause certain life threatening delayed lung diseases such as silicosis, pneumoconiosis or asbestosis.
4. DO NOT wear this respirator if any of the following conditions exist.
• Atmosphere is immediately dangerous to your life or health.
• You CANNOT escape without the aid of the respirator.
• Atmosphere contains less than 19.5% oxygen.
• Work area is poorly ventilated.
• Unknown contaminants are present.
• Contaminants are in excess of regulations or recommendations (as described in item 2 above).
5. DO NOT wear this respirator until you have passed a complete physical exam (perhaps including
a lung X-ray) conducted by qualied medical personnel, and have been trained in the respirator’s
use, maintenance and limitations by a qualied individual (appointed by your employer) who has
extensive knowledge of the Respirex supplied-air respirator.
6. DO NOT modify or alter this respirator in any manner. Use only NIOSH approved Respirex components
and replacement parts manufactured by Respirex for use with this respirator.
Failure to use NIOSH approved Respirex components and replacement parts such as visors, hoses and
ow control devices, voids NIOSH approval of the entire respirator, invalidates all Respirex warranties,
and may cause death, lung disease or exposure to other hazardous or life threatening conditions.
7. Inspect all components of this respirator system daily for signs of wear, tear or damage that might
reduce the degree of protection originally provided.
Immediately replace worn or damaged components with NIOSH approved Respirex Simplair
components or remove respirator from service (See INSPECTION AND STORAGE section on pages
14 and 19 for proper maintenance of the supplied-air respirator).
8. Be certain your employer has determined that the breathing air source provides at least Grade D or
better breathable air as specied by C.G.A. commodity specication G-7-1. This respirator must be
supplied with clean breathable air at all times.
9. DO NOT connect the respirator’s air supply hose to nitrogen, toxic gases, inert gases or other
unbreathable, non-Grade D air sources. Check the air source before using the respirator. Failure to
connect to the proper air source may result in death or serious injury.
10. DO NOT use this respirator in poorly ventilated areas or conned spaces such as tanks, small rooms,
tunnels or vessels unless the conned space is well ventilated and the contaminant concentrations
are below the upper limit recommended for this respirator. In addition, follow all procedures for
conned space entry, operation and exit as dened in applicable regulations and standards, including
29 CFR 1910.146.

7
11. If you have any questions concerning the use of this respirator, or if you are not sure whether the
atmosphere you are working in is immediately dangerous to your life or health, ask your employer.
All instructions for the use and care of this product must be supplied to you by your employer as
recommended by the manufacturer and as required by Federal Law (29 CFR 1910.134).
12. DO NOT use this respirator for underwater diving or abrasive blasting operations.
Cautions & Limitations
A - Not for use in atmospheres containing less than 19.5 percent oxygen.
B - Not for use in atmospheres immediately dangerous to life or health.
D - Air-line respirators can be used only when the respirators are supplied with respirable air meeting the
requirements of CGA G-7.1 Grade D or higher quality.
C - Do not exceed maximum use concentrations established by regulatory standards.
E - Use only the pressure ranges and hose lengths specied in the instruction manual.
J - Failure to properly use and maintain this product could result in injury or death.
M - All approved respirators shall be selected, tted, used and maintained in accordancd with OSHA and
other applicable regulations.
N - Never substitute, modify, add or omit parts. Use only exact replacement parts in the conguration as
specied by the manufacturer.
O - Refer to user’s instructions and/or maintenance manuals for information on use and maintenance of
these respirators.
S - Special or critical User’s Instructions and/or specic use limitations apply. Refer to User’s Instructions
before donning.
For technical assistance call or write to:
Respirex N.A., INC
20527 Marilyn Street
Spring
Texas 77388
Tel :[phone]
Fax :[phone]
Email :[e-mail]

Operations
Protection
Respiratory
This respirator is NIOSH approved for Type C operations. It can be worn for general purpose applications,
including pharmaceutical manufacturing, chemical and pesticide handling, tank cleaning, spray painting,
and other industrial or agricultural applications in which hazardous compounds are present.
This respirator is not approved for use in any atmosphere immediately dangerous to life or health (IDHL),
or from which the wearer cannot escape without the aid of the respirator.
Head
Respirex Supplied-Air Respirators DO NOT provide head protection.
Face
Respirex Supplied-Air Respirators provide LIMITED face protection from ying particles or spray of
hazardous liquids, but are not shatterproof.
Eyes
Respirex Supplied-Air Respirators provide LIMITED eye protection. If in doubt wear approved safety glasses
or goggles at all times.
Ears
Respirex Supplied-Air Respirators DO NOT provide hearing protection. Use properly tted earmus,
earplugs or other protection when exposed to high noise levels
Breathing air requirements
Air quality
WARNING: This respirator must be supplied with clean, breathable air, grade D or better, at all times. This
respirator does NOT purify or lter out contaminants.
Respirable, breathable air must be supplied to the point-of-attachment of the approved Respirex air supply
hose. The point-of-attachment is where the air supply hose connects to the tting that contains a pressure
gauge used to monitor the pressure of air provided to the respirator wearer.
Supplied breathing air must meet the requirements of Type 1 gaseous air described in the Compressed
Gas Association Commodity Specications G-7.1 (Grade D or higher quality), as specied by Federal Law
42 CFR, Part 84, Subpart J.
The requirements for Grade D breathable air include:
-Oxygen .................................................................................................19.5 - 23.5%
-Hydrocarbons (condensed)in mg/m3 of gas ..........................5mg/m3 max.
-Carbon monoxide .............................................................................10ppm max.
-Carbon dioxide ..................................................................................1000ppm max.
-Odour .....................................................................................................No detectable odour.
-No toxic contaminants at levels that make air unsafe to breathe.
Contact the Compressed Gas Association (1235 Jeerson Davis Highway, Arlington, VA 22202) for complete
details on commodity specications G7.1.
8

Air source
Locate the source of supplied air, from a breathing air compressor in a clean air environment. Locate the
air source far enough from your work site to ensure the air remains contaminant-free. Always use an inlet
lter on your air source.
Use suitable after-cooler/dryers with lters, and carbon monoxide monitors and alarms as necessary to
assure clean, breathable air at all times.
The air should be regularly sampled to be sure that it meets Grade D requirements.
Breathing air pressure
Air pressure must be continually monitored at the point-of-attachment while operating this respirator.
A reliable air pressure gauge must be present to permit you to continually monitor the pressure during
actual respirator operation.
DANGER failure to supply the minimum required pressure at the point-of-attachment for your hose length
and type will reduce airow and may expose you to life threatening conditions, diseases or death.
The Breathing Air Pressure Table (see page 2) denes the air pressure ranges necessary to provide
Respirex Simplair supplied respirators with air that falls within the required range of 6 - 10 cfm (170 - 280 L/
min) mass ow (Ref. 42 CFR, Part 84, Subpart J).
Make sure you understand the information in the Breathing Air Pressure Table before using this respirator.
Set the air pressure at the point-of-attachment within the required pressure range and air supply hose type
and length.
Breathing air supply hoses and hoses ttings
NIOSH approved Respirex air supply hose(s) MUST be used between the breathing tube connection tting
on the wearer’s belt and the point-of-attachment to the air supply.
NIOSH approved Respirex quick-disconnect ttings MUST be used to connect Respirex hose lengths
together. Total connected hose length and number of hoses MUST be within the ranges specied on the
Breathing Air Pressure Table (see page 2) and the respirator’s NIOSH approval label (see page 1).
9

Pre-checking The Supplied-Air Respirator
Respirex recommend these checks are carried out in a clean area at least once per month if the blouse
has not been used, and always at the start of each shift cycle, and the results of each examination must be
recorded.
1. Visually inspect the blouse for any damage that may impair the correct working of the blouse.
2. Ensure that the silencer is clean and free of any contamination from the airline. The silencer must be
replaced if it is contaminated to any extent.
3. The blouse is free from contamination both internally and externally.
4. The blouse has been stored correctly using all hanging points on the garment.
5. Blouse materials are free from tears and holes; pay particular attention to the seam areas.
6. Ensure that the waist belt air attachment is secure and not damaged.
7. Vision through the visor is not obstructed by scratches or scu marks; where tted, the outer
removable visor can be replaced by tting to the Velcro dots (see page 16).
8. The drawstring cord is intact and that the toggle gives a good tight seal around the neck.
9. Respirex recommend that the exhalation valves are part of the visual precheck. If the valve diaphragm
is distorted or damaged in any way it must be replaced (see pages 16 & 17).
10

11
Donning The Supplied-Air Respirator
It is strongly recommended that before anybody attempts to wear or use a supplied-air respirator, full
training is given on wearing and decontamination by a competent person, and the details of the training
be recorded.
Fig. 1.
Fig. 3.
6. On drawstring neck seal models lift up the front cape and then
carefully tighten the drawstring until it is secure around the
neck (Fig. 3.).
3. Adjust the air pressure at the point of attachment to within the approved pressure range. See the
Breathing Air Pressure Table on page 2.
4. With the air owing don the respirator. Ensure that the blouse sits correctly on the shoulders.
5. Pull down the back cape making sure that it lays at.
Fig. 2.
2. Connect the respirator to the air supply hose,
making sure that the couplings are tted together
correctly (Fig. 2.). Pull on both hoses to make sure
they are attached securely.
1. Connect the air supply hose to the air source
supplying Grade D breathing air. (Fig. 1.).

Fig. 4.
7. On under collar neck seal models lift up the front cape and then carefully tuck the under collar beneath
the shirt or protective clothing collar (Fig. 4.).
Fig. 5.
Make sure that the under collar neck seal lies at across the back and shoulders. Close the shirt or neck
of the protective clothing worn over the under collar (Fig. 5.).
Fig. 6.
8. Pull down the front cape, make sure it is laying
at, then pass the waist belt through the belt
loops and fasten the belt buckle (Fig. 6. or Fig. 7.),
adjust the waist belt until comfortable.
9. Re-check air pressure and adjust if necessary.
10. With air owing into your supplied-air respirator, you are now ready to enter the work area.
12
Fig. 7.

13
Dong The Supplied-Air Respirator
On completion of a work shift, leave the work area wearing the supplied-air respirator with the air still
owing.
Once outside the contaminated area the supplied-air respirator should be decontaminated. It can then be
removed by the reverse of the donning process and disconnected from the air supply.
WARNING
LEAVE THE WORK AREA IMMEDIATELY IF:
Any supplied-air respirator or air line hose becomes damaged.
Airow into the respirator slows down or stops.
Air pressure gauge drops below the minimum specied in the breathing air pressure table.
Breathing becomes dicult.
You become dizzy, nauseous, too hot, too cold or ill.
You taste, smell or see contaminants inside the air supplied blouse.
Your vision becomes impaired.
Proper work practice requires that you wear the supplied-air respirator until you are outside the
contaminated area. Do not set the respirator down in a contaminated environment because contaminants,
dirt and dust could enter the hood.

Removing And Re-Fitting The Control Waist Belt
1. Lay the respirator assembly on a clean at surface and
lift up the front cape.
2. Unscrew the retaining ring from the bulkhead (Fig. 8.).
3. Pull the breathing air tube assembly away from the
control waist belt.
Inspection & Replacement Of Component Parts
A regular inspection and replacement program should be conducted by employees.
The Respirex supplied-air respirator and all component parts and assemblies should be inspected for
damage or excessive wear before and after each use to ensure proper functioning. Immediately remove
the blouse from service and replace parts or assemblies that show any sign of failure or excessive wear that
might reduce the degree of protection originally provided.
Use only complete NIOSH approved Respirex components and replacement parts, refer to parts list for
correct part numbers.
Fig. 8.
Fig. 9.
4. Release the two pop studs on the waist belt (Fig. 9.)
and slide the waist belt out through the belt loops.
Before tting a control waist belt check there is a
new silencer tted and that it is securely screwed
into the bulkhead.
5. Slide the waist belt under the belt loops and press
together the pop studs.
6. Locate the breathing air tube assembly over the
bulkhead and tighten the retaining ring (Fig. 10.).
Check that the supplied-air respirator is working
correctly and that there are no air leaks before use.
Fig. 10.
14

Fig. 11.
Replacing The Silencer
1. Lay the respirator assembly on a clean at surface
and lift up the front cape.
2. Unscrew the retaining ring from the bulkhead (Fig.
8.).
3. Pull the breathing air tube assembly away from the
control waist belt.
4. Unscrew the silencer from the bulkhead (Fig. 11.).
5. Screw a new silencer into the bulkhead.
6. Locate the breathing air tube assembly over the
bulkhead and tighten the retaining ring (Fig. 10.).
Check that the supplied-air respirator is working correctly and that there are no air leaks before use.
15

Fig. 12.
Replacing The Removable Visor (Rigid Visor Models Only)
1. Carefully peel the removable visor from the
Velcro discs.
2. If necessary clean the hard visor before tting
a new removable visor.
3. Remove the protective lm from the new
removable visor.
4. Locate the centre discs at the top and bottom
of the removable visor on to the centre discs
on the hard visor.
5. Wrap the removable visor around each side of
the hard visor, lining up all the xing discs and
pressing together (Fig. 12.).
Replacing Exhalation Valve Diaphragm
1. Using a torque driver with a‘T8’Torx bit, loosen and remove the screw from the centre of the exhalation
valve, then remove the cap.
2. Carefully slide the diaphragm up the central spigot and remove from the exhalation valve body.
3. Check that there is no dust, debris or contamination of any kind in the exhalation valve body.
4. Carefully slide a new diaphragm down the central spigot until it rests evenly on the valve body. Ensure
the diaphragm is correctly orientated with the ridged side uppermost (Fig. 14.).
Valve cap
Diaphragm
Valve body
No4 x 1¼ ‘Torx’
C/sk screw
Locating key
Locating
channel
Fig. 13.
16

5. Replace the exhalation valve cap and ensure the two location channels engage with the locating
keys on either side of the valve body. Note: When correctly located, the valve cap will not rotate
independently on the valve body.
6. Replace the centre screw, turn by hand two times to engage the thread with the valve body, then fully
tighten using a torque driver set to 23 ± 2 cNm.
Ensure the diaphragm is
seated evenly on the valve
body with ridged side uppermost
Fig. 14.
17

18
Retaining ring.
Rubber sealing washer.
Tw o p i n w r e n c h .
Rubber sealing washer.
Valve assembly
Fig. 15.
Replacing Exhalation Valve Assembly
1. Lay the hood on a clean at surface and open fully at the waist to allow access to the interior of the
hood.
2. Using a two pin wrench (Tool No. G01486) locate the pins into the two holes in the exhalation valve-
retaining ring and unscrew.
3. Remove the rubber sealing washer.
4. From the outside of the hood carefully remove the exhalation valve assembly.
5. New exhalation valve assemblies will have all component parts screwed together, therefore prior to
tting remove the retaining ring and one of the rubber sealing washers.
6. Check that the remaining rubber sealing washer is laying at against the valve body.
7. Locate the thread on the exhalation valve assembly through the hole at the rear of the hood.
8. Locate the second rubber sealing washer around the thread on the valve body so that it is lying at
against the material of the hood.
9. Hand tighten the retaining ring onto the exhalation valve.
10. Check that the exhalation valve is orientated correctly (the Respirex lettering should be at the top of
the valve and the three slots under the cover must be at the bottom).
11. Tighten the retaining ring using the two pin wrench (Tool No. G01486, see Fig. 16.).
Fig. 16.