Kitchen Fire Suppression System

Kitchen Fire Suppression System

Hangzhou More Shine Safety Technology Co., Ltd is a high-tech enterprise
engaged in R&D, production, sales and installation of water-based fire extinguishing agent and kitchen fire suppression system . The Company continuously increases investment, introduces excellent talents and upgrades the level of software and hardware facilities to ensure its cutting-edge technology in the field of fire  prevention and disaster prevention; we always adhere to the management policy of “guarantee quality with scientific management, win customers with quality products, and win market with honest service”, striving to create a first-class fire-fighting enterprise, and develop first-class, environmentally friendly and practical fire protect ion products, dedicating to protecting people’s lives and property, providing a safe and secure space, and making contributions to building a harmonious and safe society.

1.Product Profile
• According to the GA498-2012 industrial standard for kitchen fire suppression
system , the Company independently developed and produced the singlecylinder system MS201808240002 and MS201808240003 kitchen fire suppression systems and the kitchen special fire extinguishing agent for cooking oil, which have passed the on-site fire extinguishing test of the national fixed fire extinguishing system and the refractory component quality supervision and inspection center, whose type inspection report has been obtained, as well as the CCCF certificate of the Fire Products Conformity Assessment Center of the Ministry of Public Security. The products can quickly extinguish fire in 3-8 seconds and are widely used in kitchens of restaurants, hotels, hotels, institutions, hospitals, military units, schools, factories, mines and enterprises.

2. Agent
• The fire extinguishing agent is a special fire extinguishing agent for cooking oil
independently developed by our Company;
• The agent is a specially formulated low-PH mixture of water and organic salts. It is
specially designed to quickly extinguish fires caused by flammable substances such
as grease, and to consolidate fire-fighting results through foam coatings;
• The special fire extinguishing agent for cooking oil is an environmentally friendly
product which is colorless, odorless, non-toxic, non-polluting and easy to clean;
• During the fire extinguishing process, it will have chemical reaction with the
cooking oil to form a thick foam layer covering the surface of the boiling pan, so
that the fire could be insulated from the air, thus effectively preventing the fire
from re-igniting;
• Food and edible fats that come into contact with the fire extinguishing agent will
no longer be suitable for human consumption and thus should be discarded.

fire sprinkler

A fire sprinkler or sprinkler head is the component of a fire sprinkler system that discharges water when the effects of a fire have been detected, such as when a predetermined temperature has been exceeded. Fire sprinklers are extensively used worldwide, with over 40 million sprinkler heads fitted each year. In buildings protected by properly designed and maintained fire sprinklers, over 99% of fires were controlled by fire sprinklers alone.

Fire sprinklers can be automatic or open orifice. Automatic fire sprinklers operate at a predetermined temperature, utilizing a fusible element, a portion of which melts, or a frangible glass bulb containing liquid which breaks, allowing the plug in the orifice to be pushed out of the orifice by the water pressure in the fire sprinkler piping, resulting in water flow from the orifice. The water stream impacts a deflector, which produces a specific spray pattern designed in support of the goals of the sprinkler type (i.e., control or suppression). Modern sprinkler heads are designed to direct spray downwards. Spray nozzles are available to provide spray in various directions and patterns. The majority of automatic fire sprinklers operate individually in a fire. Contrary to motion picture representation, the entire sprinkler system does not activate, unless the system is a special deluge type.

Open orifice sprinklers are only used in water spray systems or deluge sprinklers systems. They are identical to the automatic sprinkler on which they are based, with the heat-sensitive operating element removed.

Automatic fire sprinklers utilizing frangible bulbs follow a standardized color-coding convention indicating their operating temperature. Activation temperatures correspond to the type of hazard against which the sprinkler system protects. Residential occupancies are provided with a special type of fast response sprinkler with the unique goal of life safety.

Each closed-head sprinkler is held closed by either a heat-sensitive glass bulb or a two-part metal link held together with a fusible alloy such as Wood's metal and other alloys with similar compositions. The glass bulb or link applies pressure to a pipe cap which acts as a plug which prevents water from flowing until the ambient temperature around the sprinkler reaches the design activation temperature of the individual sprinkler. Because each sprinkler activates independently when the predetermined heat level is reached, the number of sprinklers that operate is limited to only those near the fire, thereby maximizing the available water pressure over the point of fire origin.

The liquid in the glass bulb is color coded to its show temperature rating.

The bulb breaks as a result of the thermal expansion of the liquid inside the bulb.The time it takes before a bulb breaks is dependent on the temperature. Below the design temperature, it does not break, and above the design temperature, it breaks, taking less time to break as temperature increases above the design threshold. The response time is expressed as a response time index (RTI), which typically has values between 35 and 250 m½s½, where a low value indicates a fast response.[15] Under standard testing procedures (135 °C air at a velocity of 2.5 m/s), a 68 °C sprinkler bulb will break within 7 to 33 seconds, depending on the RTI.[16] The RTI can also be specified in imperial units, where 1 ft½s½ is equivalent to 0.55 m½s½. The sensitivity of a sprinkler can be negatively affected if the thermal element has been painted.

fire extinguisher put

The various types of fire extinguisher put out fires started with different types of fuel – these are called ‘classes’ of fire.  The fire risk from the different classes of fire in your business premises will determine which fire extinguisher types you need.

There are six classes of fire: Class A, Class B, Class C, Class D, ‘Electrical’, and Class F.

 –    Class A fires – combustible materials: caused by flammable solids, such as wood, paper, and fabric
 –    Class B fires – flammable liquids: such as petrol, turpentine or paint
 –    Class C fires – flammable gases: like hydrogen, butane or methane
 –    Class D fires – combustible metals: chemicals such as magnesium, aluminum or potassium
 –    Electrical fires – electrical equipment: once the electrical item is removed, the fire changes class
 –    Class F fires – cooking oils: typically a chip-pan fire

Water Extinguishers

Overview:
Water extinguishers are the most common fire extinguisher type for class A fire risk. Most premises will require either water or foam extinguishers.

Use for:
– Organic materials such as:
o Paper and cardboard
o Fabrics and textiles
o Wood and coal

Do not use for:
– Fires involving electrical equipment
– Kitchen fires
– Flammable gas and liquids

How water extinguishers work:
The water has a cooling effect on the fuel, causing it to burn much more slowly until the flames are eventually extinguished.

Where to locate water extinguishers:
– By the exits on a floor where a Class A fire risk has been identified

Water spray extinguishers – what’s the difference?:
Water spray extinguishers are equipped with a spray nozzle, rather than a jet nozzle, meaning a greater surface area can be covered more quickly and the fire put out more rapidly.

Water mist extinguishers – what’s the difference?:
Water mist extinguishers have a different type of nozzle again which releases microscopic water particles. These particles ‘suffocate’ the fire and also create a wall of mist between the fire and the person using the extinguisher, reducing the feeling of heat.

Foam Extinguishers

Overview:
Foam extinguishers are most common type of fire extinguisher for Class B fires, but also work on Class A fires as they are water-based.

Use for:
– Organic materials such as:
o Paper and cardboard
o Fabrics and textiles
o Wood and coal
Plus:
– Flammable liquids, like paint and petrol

Do not use for:
– Kitchen fires
– Fires involving electrical equipment
– Flammable metals

How foam extinguishers work:
As with water extinguishers, foam extinguishers have a cooling effect on the fuel. On burning liquids, the foaming agent creates a barrier between the flame and the fuel, extinguishing the fire.

Types of premises/business who may need Foam extinguishers:
– Buildings constructed of wood or other organic materials
– Premises where there are organic materials to be found such as:
o Offices
o Schools
o Hospitals
o Residential properties
o Warehouses
– Buildings where flammable liquids are stored

In fact most buildings need either water or foam extinguishers

Where to locate foam extinguishers:
– By the exits on a floor where a Class A or Class B fire risk has been identified

Dry Powder Extinguishers

Overview:
Standard dry powder extinguishers are also called ‘ABC’ extinguishers because they tackle class A, B and C fires, however they are not recommended for use in enclosed spaces. This is because the powder can be easily inhaled, and also the residue is very difficult to clean up after. ABC powder extinguishers can also be used on some electrical fires. Specialist dry powder extinguishers are used for flammable metals

Use for:
– Organic materials such as:
o Paper and cardboard
o Fabrics and textiles
o Wood and coal
Plus:
– Flammable liquids, like paint and petrol
Plus:
– Flammable gases, like liquid petroleum gas (LPG) and acetylene
Plus:
– Fires involving electrical equipment up to 1000v

Specialist dry powder extinguishers are only used on flammable metals, such as titanium and magnesium.

Do not use for:
– Fires involving cooking oil
– Fires involving electrical equipment over 1000v
– or in enclosed spaces, such as offices or residential properties

How dry powder extinguishers work:
Dry powder extinguishers smother fires by forming a barrier between the fuel and the source of oxygen.

Where to locate Dry Powder extinguishers:
– Place dry powder extinguishers near to the source of the fire risk.

Specialist Dry Powder extinguishers – what’s the difference?:
Specialist dry powder extinguishers work in the same way as standard dry powder extinguishers but are for use with flammable metals only. There are 2 types of specialist dry powder extinguishers – ‘L2’ which only tackles lithium fires, and ‘M28’, for all other flammable metal fires.

Carbon Dioxide (CO2) Extinguishers

Overview:
CO2 extinguishers are predominantly used for electrical fire risks and are usually the main fire extinguisher type provided in computer server rooms. They also put out Class B fires (flammable liquids, such as paint and petroleum).

Use for:
– Flammable liquids, like paint and petrol
– Electrical fires

Do not use for:
– Kitchen fires – especially chip-pan fires
– Combustible materials like paper, wood or textiles
– Flammable metals

How CO2 extinguishers work:
CO2 extinguishers suffocate fires by displacing the oxygen the fire needs to burn.

Types of premises/business who may need CO2 extinguishers:
– Premises with electrical equipment, such as:
o Offices
o Kitchens
o Construction sites
o Server rooms

All work vehicles should also carry a smaller 2kg CO2 extinguisher.

Where to locate CO2 extinguishers:
– Place near to the source of the fire risk and/or near the fire exits.

Wet Chemical Extinguishers

Overview:
Wet chemical extinguishers are designed for use on Class F fires, involving cooking oils and fats.  They can also be used on Class A fires although it is more usual to have a foam or water extinguisher for this type of fire risk.

Use for:
– Cooking oil/fat fires
– Organic materials such as:
o Paper and cardboard
o Fabrics and textiles
o Wood and coal

Do not use for:
– Flammable liquid or gas fires
– Electrical fires
– Flammable metals

How wet chemical extinguishers work:
Wet chemical extinguishers create a layer of foam on the surface of the burning oil or fat, preventing oxygen from fuelling the fire any further. The spray also has a cooling effect.

Types of premises/business who may need wet chemical extinguishers:
– Commercial kitchens
– Canteens

Where to locate wet chemical extinguishers:
– Place near to the source of the fire risk

fire hose

A fire hose (or fire hose) is a high-pressure hose that carries water or other fire retardant (such as foam) to a fire to extinguish it. Outdoors, it attaches either to a fire engine or a fire hydrant. Indoors, it can permanently attach to a building’s standpipe or plumbing system. The usual working pressure of a fire hose can vary between 8 and 20 bar (800 and 2,000 kPa; 116 and 290 psi) while per the NFPA 1961 Fire Hose Standard, its bursting pressure is in excess of 110 bar, (11,000kPa; 1600psi)

Until the mid-19th century, most fires were fought by water transported to the scene in buckets. Original hand pumpers discharged their water through a small pipe or monitor attached to the top of the pump tub. It was not until the late 1860s that hoses became widely available to convey water more easily from the hand pumps, and later steam pumpers, to the fire.

Following the invention of the vulcanization process as a means of curing raw soft rubber into a harder, more useful product, the fire service slowly made the transition from bulky and unreliable leather hose to the unlined linen hose, then to a multi-layer, rubber lined and coated hose with interior fabric reinforcement. This rubber hose was as bulky, heavy, and stiff as a leather hose, but was not prone to leaking. It also proved more durable than unlined linen hose. Its wrapped construction resembled some hoses used today by industry, for example, fuel delivery hoses used to service airliners.

Modern fire hoses use a variety of naturaland syntheticfabrics and elastomers in their construction. These materials allow the hoses to be stored wet without rotting and to resist the damaging effects of exposure to sunlight and chemicals. Modern hoses are also lighter weight than older designs, and this has helped reduce the physical strain on firefighters.^[8] Various devices are becoming more prevalent that remove the air from the interior of fire hose, commonly referred to as fire hose vacuums. This process makes hoses smaller and somewhat rigid, thus allowing more fire hose to be packed or loaded into the same compartment on a fire fighting apparatus.

In the past, cotton was the most common natural fiber used in fire hoses, but most modern hoses use a synthetic fiber like polyester or nylon filament. The synthetic fibers provide additional strength and better resistance to abrasion. The fiber yarns may be dyed various colors or may be left natural.

Coatings and liners include synthetic rubbers, which provide various degrees of resistance to chemicals, temperature, ozone, ultraviolet (UV) radiation, mold, mildew, and abrasion. Different coatings and liners are chosen for specific applications.

Hard suction hose consists of multiple layers of rubber and woven fabric encapsulating an internal helix of steel wire. Some very flexible hard suction hose uses a thin polyvinyl chloride cover with a polyvinyl chloride plastic helix.

WATER FIRE EXTINGUISHER

MSF-PS-03 series extinguisher is Portable Water extinguishers,
pressure storage type. multipurpose, best on Class A fires solid
fires (e.g.wood, paper, textiles, fibers, rubber).Introduction
FeaturesDesign,manufacture and inspection comply with EN3 standard.
Cylinder is listed with European Directive PED97/23/EC, with CE
mark, Polyethylene internal lining safeguards against corrosion.
High-grade brass head valve assembly with pressure release
valve ensures reliability and optimizes efficiency.
Precision built mechanical pressure gauge provides a very
accurate indication of extinguisher’ pressure status.
Water fire extinguishers are particularly effective for cooling and
penetrating the fire.
Strong plastic base.
Silk screen print or Sticker label to choose.
*Note: Water Extinguishers are not suitable for life involving
electrical risk.2KG 5KG

6L SCBA ,Self-Contained Postisive Pressure Air Breathing Apparatus With Secondary supply connections. Product code: RHZKF6/30

More shine positive pressure air breathing apparatus

Model:SAC1100-SERIES,RHZKF6.8/30,RHZKF9/30,G-F-20

WARNING: Only close observance of the instruction laid out in this booklet can guarantee safe use of the apparatus and perfect service. Breathing apparatus must be employed by specially trained people under supervision of person well aware of its limits of application and of the laws in being.

1、  Application field

VOLER position pressure air breathing apparatus is designed for the use in fire fight application, chemical industry, metallurgy, mines, petrol industry, rescue operation, maintenance works and polluted area wherever there is or may be oxygen deficiency, It  protects users from toxic gas, particles and mist, word in environment with less oxygen content than 17%,or fog caused by fire accident.

2、  product description

VOLER positive pressure air breathing apparatus is composed of the following parts:

Air is compressed in the cylinder(pressure of 30MPa).Compressed air is reduced to (0.75±0.15) MPa through the pressure reducer, and led to medium pressure hose. Then it is reduced in pressure again through the demand valve and provided to user through full mask.

The outside toxic gas or particles can not get inside because the pressure inside the mask is always higher than the atmospheric pressure. Thus the tightness of the face mask is guaranteed.

2.1 Full mask

Full mask is specially designed for Asian face, ensuring comfort and good seal that provides an efficient tightness

2.2 Demand valve

The demand valve provides air to the wearer depending on the air breathing need of the wearer. It ensures a higher air pressure inside the face mask than outside pressure.

The demand valve can be manually switched off thanks to the switcher(C) on the top of the valve, and then no air is provide to the face mask. The demand valve is automatically switched on at the first inhalation of the wearer.

At the central bottom of valve, there is a manual control air supply button(D) to be used to:

-Switch on the  demand valve manually;

-Gave an additional breath of air if the wearer feels supply deficiency.

Besides, it can release the remaining air inside the medium pressure hose which is more convenient for test and disassembly of the quick connector.

2.3 Pressure reducer

The pressure reducer is made of brass with anticorrosive coating. Compressed air is reduced in pressure by the pressure reducer to (0.75±0.15)MPa. Pressure reducer delivers a constant and stable pressure during the life time of the cylinder. Pressure reducer is connected to :

-Cylinder;

-Medium pressure hose which is connected to demand valve and providing air;

-High pressure hose which is connected to pressure gauge.

2.4 Safety valve

Safety valve locates on the pressure reducer. When medium pressure is overhigh, the safety valve switches on automatically to release air, and switches off after medium pressure reduces too normal value.

It is regulated in the norm GA124-2004 “fire fighting positive pressure air breathing apparatus ” that, opening pressure and fully exhausting pressure of safety valve should be within 110% to 170% of maximum designing output pressure of pressure reducer; and the closing pressure of safety valve is no less than maximum designing output pressure. That is :

Safety valve opening pressure and fully exhausting pressureL0.99-1.53)MPa

Safety valve closing pressure:≥0.09MPa.

2.5Pressure gauge and warning device

The scale of pressure gauge is (0-40)MPa. The gauge connects to pressure reducer through high pressure hose. Fluorescent material is used in dial plate, which enables the pressure value to be read clearly in dark. The watchcase takes high anti-impact material, with rubber protective  cover, to be water proof, shock proof and anti dust. The warning device locates on the high pressure hose near pressure gauge, which actuates the audible warning when cylinder pressure drops to (5.5±0.5)MPa. From the beginning of the warning, the user has to leave the polluted area immediately, and then plug a new cylinder if needed.

2.6Back plate assembly with harness

Back plate assembly includes back plate, harness, waist belt, buckle, pressure reducer holder and cylinder tightening belt. Injected with flame resistant plastic and carbon fiber material, the back plate is compact, light, high mechanical resistant, and anti-impact. It is designed to fit human body’s back, notably regarding ergonomics and comfort. All the components of the back plate assembly are fire retardant treated.

2.7 Medium pressure hose

The medium pressure hose is linked to the pressure reducer and to the demand valve. It is made from flame resistant rubber. The explosion pressure is 4MPa,more than 4 times of maximum output pressure from pressure reducer.

 2.8 Cylinder and cylinder valve

The cylinder is made from fully wrapped carbon fibre reinforce aluminum lined. With 6.8L’s capacity, it ensures 1 hour of moderate activity in real use.

3.0 Operation sequence

3.1 Cylinder connecting

The assembly can accept one cylinder with maximum capacity for 12L, or two 6.8L cylinders. Fpr two cylinders, there needs to be double cylinder holder and two inhalation mouths, and the length of the tightening belt should be increased.

A)      Cylinder valve is well closed;

B)      Put the cylinder into the groove of central back plate, and connect firmly the cylinder to pressure reducer;

C)      Fasten the belt buckle of cylinder.

3.2 Demand valve connecting

Snap the medium pressure demand valve and reducer hoses together.

Connector is securely locked. To disconnect apply a slight axial force while sliding back the female connector ring. Don’t disconnect when the hose is under pressure. Press button on the demand valve to avoid air leaks when donning the set.

3.3 Quick check before use (before use, the following sequences should be followed to avoid danger)

A) Pressure of compressed air in the cylinder:

With valve fully opened, the valve of pressure gauge is 30 MPa, under 30MPa and 20℃.Otherwise , the effective using time will be shortened.

B)Air-tightness of cylinder:

It is regulated in the norm GA124*2004 that when open and close the pressure gauge, pressure drop on the gauge should be no more than 2MPa within one minute.

D)      Warning system:

-Close the demand  valve;

-Open cylinder valve to fill the hose with air, and then close it ;

-Open demand valve manual control button, vent the air off slowly with hand palm and observe the value change of pressure gauge;

-The warning system start working when the pressure gauge shows(5.5±0.5)MPa.

3.4 Donning the set

A) Adjusting the back plate

Set the shoulder straps at maximum length: don the set and pill down the straps tips until the back plate rests comfortably on the user’s back.

Fasten waist belt, and  pull the free end of belt till the desired tension and comfort.

B)Donning the mask

Hold the mask by  one hand till fully with the face, and pull the headband by the other hand to cover the head; pull the band till full fit and comfort.

Plug the demand valve into the mask and inspire. If it is impossible to breathe and mask fully fits the face, then the mask is well air-tight. It is necessary to avoid the facial hair between mask and face for fully fit.

3.5 During use

When in use check from time the pressure gauge and plan the work load to suit the air left in the cylinder. With a 6.8L cylinder the breathing apparatus can last for 10 minutes after the warning has started. Then the user must leave the polluted area immediately.

In case of emergency, extreme condition or the user needs extra air supply, the manual control button can be opened to release bigger flow of air supply.

3.6 After use

A) Close the cylinder valve;

B)Disconnect demand valve from the mask, and the excess air will be vented off;

C)Unfasten waist belt ad slide back the shoulder straps;

D)Place the set and cylinder up, on a clean surface.

4.Maintenance

4.1Cylinder

The cylinder must receive regular check according to related national laws and regulations, and be tested by professional authorized institute and personnel; records should be checked foe leaks and pressure reducer connector for tightness.

A)      Cylinder filling air has to follow EN132 norm, specification as below:

Requirement on humidity: moisture inside cylinder should be o more than 35g/m3 under 30MPa working pressure.

B)      Cylinder valve has to be kept shut down after end of use for refilling to prevent moisture from getting in . Don’t empty air in cylinder and a pressure of at least 0.5MPa should remain. If the cylinder is empty with air, it has to be dried before charging: air drier or cylinder kiln can be used, with maximum drying temperature 90℃.

C)      Cylinder should b place up (cylinder valve upwards) during transport and storage. When being carried , the cylinder should be held closely by both hands and it is strictly forbidden to hold the cylinder by handwheel. Cylinder by handwheel. Cylinder should be protected from iMPact, rolling, cast and shock.

Element	Percentage of weight(dried air)	Percentage of volume(dried air)
Oxygen	23.01%	20.93%
Nitrogen	75.51%	78.10%
Argon	1.29%	0.9325%
Carbon dioxide	0.04%	0.03%
Hydrogen	0.001%	0.01%
Neon	0.0012%	0.0018%
Helium	0.00007%	0.0005%
Krypton	0.0003%	0.0001%
Xenon	0.00004%	0.000009%

4.2 Cleaning and disinfecting

A)Harness on back plate can be removed for cleaning and disinfecting;

B)During washing, lukewarm water and neutral detergent should be used; The concentration and duration of use should follow the instruction of the detergent.

Corruption from detergent to components of breathing apparatus should be avoid: organic solvent will damage rubber or plastic parts.

D)      After cleaning and disinfecting, all components should be sired under 15℃ to 30 ℃.Any heat radiation source should be avoided like sunshine, drying machine, heater ect. Compressed air is recommended for use for airing ok key components like pressure reducer and medium pressure hose, to remove the potential humidity.

4.3 Testing

Test to the breathing apparatus is need after each cleaning and maintenance.

If the film of demand valve or any rubber parts shows damage or aging(being sticky, hardened or crinkled), it should be changed immediately.

Low pressure air-tightness test and demand valve static positive pressure test must be done in accordance with norm

4.4 Storage

Only after cleaning, disinfecting, checking, maintaining and recording , breathing apparatus can be stores in non-dust, shady and cool place under room temperature, and away from sunshine, heat source, humidity and corrosive substance.

Storage temperature has to be within  15℃ to 30 ℃ and the environment needs to be dry. Besides, breathing apparatus should be kept in cases of good tension resistance.

Staffs without special training are forbidden to step in the storage room. After storage and before each use, make sure that working environment will not damage products property and test to all the components has been done. It is strictly forbidden for the users to disassembly or misuse the equipment.

4.5 Transportation

Breathing apparatus should be kept in the original package or transportation case, and  no special requirement is needed. Please also follow the storage instruction.

5.Maintenance, test and record

5.1 Requirement on test: Please see the table below

Part	Activity	1	2	3	4	5	6
Complete set	Cleaning			/
Complete set	Function, tightness		/	/		/d
Complete set	Back plate check	/
Demand valve	Cleaning		/
Demand valve	Disinfecting					/c
Demand valve	Membrane check					/c
Demand valve	Member replacement						/a
High pressure connector	Testing  pressure(pressure gauge)					/
High pressure connector Oring	Replacement					/c
Pressure reducer	Revision				/
Cylinder	Testing						/d
Full mask	Cleaning			/c
Full mask	Testing					/

1:Before allowing the use;2:Before use;3:After use;4:Every six months;5:Annually;6:Every three years

a)       The set been used; b) Other breathing apparatus; c)After use in corrosive areas or in extreme ambient conditions; d)In accordance with national regulations.

Warning: every time the valve is disassembled/assembled from/to the cylinder for maintenance and/or testing , the valve shall be changed. Please refer to the specific information notice that comes with the cylinder or to the label of composite cylinder.

After the replacement of any part whatsoever it is mandatory to perform all on function and pneumatic tightness.

5.2 Daily maintenance record

Please see the table below:

Name

Date

hand band

Cylinder valve

Pressure reducer

Demand valve

Mask

Disinfect/cleaning

Eyrballing

Parts change

Disinfect/cleaning

Eyrballing

Parts change

Disinfect/cleaning

Eyrballing

Parts change

Disinfect/cleaning

Eyrballing

Parts change

Disinfect/cleaning

Eyrballing

Parts change

6.Common faults and measures

Warning: the positive air breathing apparatus is essential for user’s life, thus the staff in charge of maintenance must receive special training from manufacturer and get qualification accordingly.

Component	Faults	Possible cause	Measures
High pressure parts	Air leakage at connection points	1.connction untight	Fasten again
		2.demage of sealing parts	Replace sealing parts
Warning device	No warning under(5.5±0.5)MPa	1.position change of warning wistle	Readjst position fo whistle
		2.whistle blocked or dirty	Clean the whistle
Pressure reducer	Air leakage at soft hose connection	Damage of O ring	Replace o RING
	Air leakage at safety valve	1.damage of high pressure sealing	Replace damaged parts
		2.air leakage of valve	Replace for new one
Cylinder valve	Air leakage at handwheel	1.damage of sealing	Replace sealing parts
	Close non-tihghtly or air non-smoothly	1.damage of valve core due to too much pressure	Replace valve core
		2.damage of main valve body	Replace main body
	Air leakage at cylinder neck	Damage of O ring	Replace O ring
Demand valve	Air deficiency	Inner struction fault	1.send back to manufacturer
	Abnormal air supply or supply while unconnected to mask		2.repair by special trained person

Delta Plus reserves the right to explain and modify this instruction.