GCE TERMINAL UNITS AGSS Operating instructions

GCE HEALTHCARE

EN

TERMINAL UNITS

ANAESTHETIC GAS SCAVENGING SYSTEMS

TERMINAL UNIT

GASUTTAG

TERMINÁLNÍ JEDNOTKA

SV

CS

INSTRUCTION FOR USE

BRUKSANVISNING

NÁVOD K POUŽITÍ

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EN

1. FOREWORD

GCE AGSS Terminal units (further only as ”TU AGSS”) are medical

devices classiﬁed as Class IIa according to the Directive concerning

medical devices (93/42/EEC – MDD 2007/47/EC).

Conformity with essential requirements of the Directive 93/42/EEC – MDD

2007/47/EC is on the basis of the EN ISO 9170-2 standard.

2. INTENDED USE

Anaesthetic gas scavenging systems is made to ensure patient safety and

to minimize exposure of the operator and other persons to anaesthetic

gases and vapours. It can includes parts for the power device, pipeline

system, non-interchangeability between key components and avoidance

of cross connections between anaesthetic gas scavenging (AGSS) disposal

systems and medical gas and vacuum pipeline systems.

3. OPERATIONAL, TRANSPORT AND STORAGE SAF

ETY REQUIREMENTS

KEEP THE PRODUCT AND ITS ASSOCIATED EQUIPMENT AWAY FROM:

• All sources of heat

• Flammable materials

• Oil or grease (including all hand creams)

• Water

• Dust.

The product and its associated equipment must be prevented from

falling.

Always maintain oxygen cleanliness standards.

Use only the product and its associated equipment in a well ventilated

area.

ENGLISH

INSTRUCTION FOR USE: TU AGSS

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EN

OPERATING CONDITIONS STORAGE, TRANSPORT

CONDITIONS

-20/+60 °C -30/+70 °C

10/100% 20/70%

600/1200 mbar 600/1200 mbar

Before ﬁrst use the product must be kept in its original packaging to

ensure that the product is not contaminated. For transport and storage

GCE recommends use of the original packaging (including internal sealing

bag and caps).

Statutory laws, rules and regulations for medical gases, accident prevention

and environmental protection must be observed.

4. PERSONNEL INSTRUCTIONS

The Medical Devices Directive 93/42/EEC states that product provider

must ensure that all personnel handling the product are provided with the

operating instructions & performance data.

Do not use the product without properly familiarization of the product

and its safe operation as deﬁned in this Instruction for use. Ensure user

is aware of particular information and knowledge required for the gas

in use.

5. PRODUCT DESCRIPTION

Terminal units consist of two basic parts:

• housing

• quick connection valve

Individual parts must always be designed for the identical type of gas. Each

of these basic parts is marked with stamping displaying the gas for which

it is intended.

An integral part of each terminal unit is a check valve enabling the

through-pass of the gas when a counterpart is connected and which

automatically prevents the gas from passing through when the counterpart

is disconnected.

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EN

FOR TERMINAL UNIT MC70  AGSS

1) Locking ring

2) Push button

3) Cover screw

4) Transparent cover plate

5) Name plate

6) Quick connection valve

7) Housing holder

8) Housing

9) Holding screw

10) Connection nut

Technical parameters

Flow 50 l/min pressure drop 15 kPa

Flow 30 l/min pressure drop 5 kPa

FOR TERMINAL UNIT MINI  AGSS

101211798

13

654321

1) Housing

2) Gasket

3) Maintenance valve

4) O-ring

5) Swinel nut

6) Qc body

7) Name plate

8) Exposed box

9) Fixation screw

10) Plug

11) Sleeve

12) Circlip

13) Grove for circlip

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EN

FOR TERMINAL UNIT MEDIUNIT

A B C D E F G H I J K

A  GAS SPECIFIC PLUG

Plugs are part of the button designed in colours speciﬁed to the gas for

which TU is designed for.

B  BUTTON

Button serves for disconnection of the medical device connected in the

TU.

C COVER  RECESSED OR EXPOSED

Recessed cover or exposed cover are basic external part of the complete

TU.

D  QUICK COUPLER QC

Quick coupler is used to connect the medical devices into the TU. Quick

coupler allows only the gas speciﬁed device for which also the TU is de-

signed for. Quick coupler can be only connected into the housing which is

designed for the same type of gas.

E  SCREWS M5X12

TU includes 3 pcs of screws M5x12 to be used for ﬁxing the housing in the

installation box.

F  ORING

Housing included an o-ring as a basic sealing element between housing

and quick coupler.

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EN

G  CHECK VALVE OF TU

Included in every TU is a check valve that automatically closes the housing

if nothing is connected to the quick coupler.

H  HOUSING WITH AXIAL OR RADIAL INLET

Housing is an in-built part of installation with two general variants:

• Housing with radial inlet connection

• Housing with axial inlet connection

I  LOCKING PLATE

Locking plate secures the housing with quick coupler in the installation

box.

J  INSTALLATION BOX

Installation box is used for installation of TU in or on the wall.

K  PLUG

The plug prevents contamination of the installation box.

Technical parameters

Dimensions:

• Height: 62,5 mm

• Diameter of installation box: 60 mm

• Weight : 0,37 kg

6. INSTALLATION

6.1. INSTALLATION

Installation can only be carried out by a person with appropriate

knowledge and in accordance with applicable regulations and the EN

ISO 7396-2 standard.

VISUAL INSPECTIONS BEFORE INSTALLATION

• Check whether the unit (including labels and marking) is not visibly

damaged. If it states signs of damage, put it out of operation and mark

its condition.

• Make a visual check whether the product is not contaminated; if

necessary proceed according to the cleaning procedures which are

described in this Manual.

INSTALLATION

• Before assembly please blow through the internal space of the pipeline.

• Never use oil or grease.

During assembly always use suitable and functional tools and adhere to

safety requirements for operation, transport and storage, and maintain

appropriate cleanliness of the terminal unit. (see Chapter 3).

The minimum inter-axis distance between 2 sockets must be a minimum of

100 mm; the following order should be respected beginning from the left.

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EN

10 cm 10 cm 10 cm

1 2 3 4

O2 N2O Medical Air Medical aspirator

(vacuum)

6.1.1. RECESSED INSTALLATION MC70  BACK WALL

FIRST CHECK THAT THE VALVE BODY IS FOR THE CORRECT TYPE OF

GAS!

The valve is plugged and leakage-tested upon delivery.

• Measure the distance between the walls (a).

• Adjust the mounting brackets (17) to correct measurement,see sketch

above and tighten by means of the screws (13) and nuts (14) to the wall

box brackets (16).

• Mark out where to place the wall box (11).

• Mount the wall box to the rear wall by means of the two enclosed plaster

screws (12).

• Insert the copper pipe on the valve body (8) into the wall box (11) and

through the prebored hole (from the frontside of the wall).

• Slip the rubber bushing (15) over the copper pipe and ﬁx it to the wall

box (11).

• Place the valve body (8) in position and fasten it with the two enclosed

hexagonal screws (9) by means of an allen key. Use the protecting cover

until the valve is mounted, so that dust will not contaminate the valve

body.

• Solder the copper pipe to the correct gas pipe (use cadmium-free silver

solder).

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EN

• Make a pressure test of the pipe connection.

• Continue the assembly after a hole ca 78 mm is taken up on the correct

place of the front wall and the wall is mounted.

• Unscrew the connecting nut (10) and remove the tightening plug.

• Mount the quick connection valve (6) after checking that the O-ring

is correctly positioned. Tighten by means of the special tool 325 197

290 and check during the tightening that the guide slot is positioned

upwards, corresponding to 12 on a clock face. (See sketch.)

• Place the correct name plate (5) on the transparent cover plate (4) (the

screw holes shall be in horisontal position) and mount it with the two

screws (3). (Do not use too much force!)

• Fasten the push plate (2) with the circlip (1)

• Test the function of the coupling by connecting a dosage device with a

male coupling. The coupling should only release its grip when the push

plate (2) is pressed inwards.

Keep all equipment, also hands, tools, working clothes clean and free

from grease or oil.

6.1.2. RECESSED INSTALLATION MC70

FIRST CHECK THAT THE VALVE BODY IS FOR THE CORRECT TYPE OF

GAS!

The valve is plugged and leakage-tested upon delivery.

• Take up a hole diameter ca 78 mm on the front wall where the outlet

valve is to be placed.

• Put the wall box (11), from the rear side of the front wall, on its place and

fasten it by means of the two plaster screws (12). (The mounting brackets

with screws and nuts are not needed when front wall mounting is used.)

• Insert the copper pipe on the valve body (8) into the wall box (11) and

through the prebored hole (from the frontside of the wall).

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• Slip the rubber bushing (15) over the copper pipe and ﬁx it to the wall

box (11).

• Place the valve body (8) in position and fasten it with the two enclosed

hexagonal screws (9), by means of an allen key. Use the protecting cover

until the valve is mounted, so dust will not contaminate the valve body.

• Solder the copper pipe to the correct gas pipe (use cadmium-free silver

solder).

• Make a pressure test of the connection.

• Unscrew the connecting nut (10) and remove the tightening plug.

• Mount the quick connection valve (6) after checking that the O-ring

is correctly positioned. Tighten by means of the special tool 325 197

290 and check during the tightening that the guide slot is positioned

upwards, corresponding to 12 on a clock face. (See sketch.)

• Place the correct name plate (5) on the transparent cover plate (4) (the

screw holes shall be in horisontal position) and mount it with the two

screws (3). (Do not use too much force!)

• Fasten the push plate (2) with circlip (1).

• Test the function of the coupling by connecting a dosage device with a

male coupling. The coupling should only release its grip when the push

plate (2) is pressed inwards.

6.1.3. RECESSSED INSTALLATION MINI

1 2 3 4 5 6 7 8 9 10 11 12 13 14

CONDITIONS

• The wall box and valve body are already carefully aligned and ﬁxed in

the ﬁnished wall. The piece of copper tube in the valve body is brazed

to the proper service line and the joint is tested for leaks.

ASSEMBLY

• Remove the protecting cover of the wall box (1) with a knife or screw

driver and unscrew the plug.

• Insert the gasket (3), smoothly greased with silicon, into the valve

body(2).

• Screw the maintenance valve into the valve body. Use tool 202 200 514

(torque 12 Nm).

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EN

• Insert the O-ring (5) into the slot of the valve case (7), and screw the

coupling fully into the valve body (2).

• Then turn the valve case until the locking slot is exactly plumb over the

coupling centre line. Secure the coupling in that position with the locking

nipple (6). Use a 24 mm spanner or special tool 202 200 513 (torque

15 Nm).

• Test the connection for leaks. Slip the rubber bushing (8) over the

coupling, bevelled end outwards, and press the bushing against the

base of the valve body (2).

• Insert the name ring (9) into the cover ring (10).

• Insert the plastic cup (11) into the name ring and slip it over the bushing.

Fasten the plastic cup in the valve body with the two screws (12). Tighten

the screws until the cover ring rests closely against the wall.

• Fasten the push-release plate (13) to the coupling with the circlip (14).

• Test the function of the assembled gas outlets by connecting a male

quick coupling for the respective gas.

• Reject enclosed details intended for exposed assembly.

Keep all equipment, also hands, tools, working clothes clean and free

from grease or oil.

6.1.4. RECESSED INSTALLATIONI MEDIUNIT

J L H1 I E

H2

K

4x Holes (O)

• Drill a hole of diameter 60 - 65 mm into the wall for installation of the

installation box (J).

• For axial housing (H2): drill a hole for axial inlet connection into the bot-

tom (marked) of the installation box (J). Seal the radial hole with plug (K)

to protect installation box (J).

For radial housing (H1): continue by the next point.

• Fix the installation box (J) in the prepared hole with four screws (L).

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EN

If TU is being ﬁxed in the wall by plastering, seal the four holes (O) need-

ed for ﬁxation of the cover by insulating tape to protect them against

clogging during plastering.

• Place housing (H1 or H2) in the installation box (J) together with the lock-

ing plate (I) as shown on the picture and ﬁx with three screws M5x12 (E).

• For radial housing (H1): Push the plug (K) on the pipe to seal the radial

hole on the installation box (J).

• Connect TU to the medical gas supply:

• Connect radial housing (H1) by soldering the pipe to the pipeline ac-

cording to EN ISO 7396-2 standard.

• Connect axial housing (H2) by connecting the hose to the axial con-

nection according to EN ISO 5359 standard.

Keep all equipment, also hands, tools, working clothes clean and free

from grease or oil.

6.1.5. EXPOSED INSTALLATION MC70

FIRST CHECK THAT THE VALVE BODY IS FOR THE CORRECT TYPE OF

GAS!

The valve is plugged and leakage-tested upon delivery.

• Mark out where to place the outlet valve.

• Place the valve body (8) in position on the wall and fasten it with the two

enclosed plaster screws (12).

• Solder the copper pipe to the correct gas pipe (use cadmium-free silver

solder.)

• Make a pressure test of the pipe connection. Use the protecting cover

until the valve is mounted, so that dust will not contaminate the valve

body.

• Unscrew the connecting nut (10) and remove the tightening plug.

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EN

• Mount the quick connection valve (6) after checking that the O-ring

is correctly positioned. Tighten by means of the special tool 325 197

290 and check during the tightening that the guide slot is positioned

upwards, corresponding to 12 on a clock face. (See sketch.)

• Place the correct name plate (5) on the transparent cover plate (4) (the

screw holes shall be in horisontal position) and mount it placed in the

wall box (11) with the two screws (3). (Do not use too much force!)

• Fasten the push plate (2) with the circlip (1).

• Test the function of the coupling by connecting a dosage device with a

male coupling. The coupling should only release its grip when the push

plate (2) is pressed inwards.

Keep all equipment, also hands, tools, working clothes clean and free

from grease or oil.

6.1.6. EXPOSED INSTALLATION MINI

108 116 9

54321 712

CONDITIONS

• The valve body is already carefully aligned and ﬁxed on the wall. The

piece of copper tube in the valve body is brazed to the proper service

line and the joint is tested for leaks.

ASSEMBLY

• Unscrew the tightening plug. Take the gasket (2) smoothly greased with

rease for oxygen and insert to the valve body (1).

• Screw the maintenance valve into the housing. Use tool No. 202 200

514 torque 12 Nm).

• Insert the O-ring (4) in the slot of the valve case (6) and screw the

coupling fully into the housing (1).

• Then turn the valve case until the locking slot is exactly plumb over the

coupling centre line. Secure the valve case in this position with the

locking nipple (5). Use a 24 mm spanner or special tool 202 200 513,

(torque 15 Nm).

• Test the connection for leaks.

• Fasten the chain of the dust plug (10) to the cover by means of the loop.

• Fasten the name plate by means of the two screws (9) and tighten the

cover against the wall.

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EN

• Place the sleeve (11) on the valve case and lock it with the circlip (12).

• Test the function of the assembled gas outlets by connecting a male

quick coupling for the correct gas.

• Reject enclosed details intended for recessed outlets.

Keep all equipment, also hands, tools, working clothes clean and free

from grease or oil.

6.1.7. EXPOSED INSTALLATION MEDIUNIT

J I H1 E L

H2

K

L

E

H

I

• For axial housing (H2): drill a hole for axial inlet connection into the bot-

tom (marked) of the installation box (J) and into the wall. Seal the radial

hole with plug (K) to protect installation box (J).

• For radial housing (H1): continue by the next point.

• Place housing (H1 or H2) in the installation box (J) together with the lock-

ing plate (I) as shown on the picture and ﬁx with three screws M5x12 (E).

• Fix completed set with two screws (L). Holes for screws are marked in

the installation box (J).

• For radial housing (H1): Push the plug (K) on the pipe to seal the radial

hole on the installation box (J).

• Connect TU to the medical gas supply:

• Connect radial housing (H1) by soldering the pipe to the pipeline ac-

cording to EN ISO 7396-2 standard.

• Connect axial housing (H2) by connecting the hose to the axial con-

nection according to EN ISO 5359 standard.

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6.2. TEST AFTER THE CARRYING OUT OF INSTALLATION

6.2.1. TEST OF FUNCTIONALITY AND LEAKAGE TEST AFTER THE END

OF INSTALLATION

• For the test of functionality and leakage test use the gas for which the

terminal unit is intended or the medical air or nitrogen with pressure as

speciﬁed in Chapter 2.

• Test the connectivity of counterparts of all installed terminal units, for

variants with the positioning of a counterpart of the quick connector

verify the right orientation of the quick connectors.

• Test the through-pass capacity of the terminal unit for presence of gas

on the outlet.

• Test the general tightness of the terminal unit and with all accessories

in the state with connected as well as disconnected counterparts of the

quick connectors. The leakage must not exceed 0.296 ml/min in any of

the described conditions (this corresponds to a change in the pressure

0.03 kPa.l/min for the leakage test for a pressure drop).

• Clean the terminal unit from possible impurities and check the integrity

and presence of all labels and markings.

Any other conditions of installation and procedures for testing after

installation are governed according to the applicable standard “EN ISO

9170-2” and EN ISO 7396-2".

If any leakage or another defect of the terminal unit is discovered, use the

procedure described in Chapter 9.3 and return the unit for the carrying

out of the servicing activity.

7. OPERATIONS

7.1. BEFORE USE

7.1.1. PREPARATION FOR USE OF THE TERMINAL UNIT

• Check if there is visible external damage to the terminal unit (including

the labels and marking). If it shows signs of external damages, avoid its

use and identify its status.

• Visually check if the product is contaminated; and if needed, use the

cleaning procedure detailed in this Manual.

• Check the unit for leakage (e.g. by listening for leakage that can be

heard).

Terminal unit can be used only for the gas speciﬁed on the button. Never

try to use it for dierent type of gas.

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7.2. CONNECTING DEVICE TO TU

Any devices used with TU must be compatible with the gas for which TU

is intended for.

Always make sure the device is connected ﬁrst and then used on the

patient.

7.2.1. CONNECTING DEVICE TO TU

Push the probe (L2) into the TU and lock

it in the working position.

7.2.2. DISCONNECTION OF TU

To disconnect the probe (L2) from TU

hold the probe and press the button (B)

into the ﬁnal position.

7.3. AFTER EVERY USE

Disconnect the medical devices used

from the terminal unit.

8. CLEANING

Remove general contamination with

a soft cloth damped in oil free oxygen

compatible soap water and rinsed with clean water. Disinfection can be

carried out with an alcohol-based solution (spray or wipes).

If other cleaning solutions are used, check that they are not abrasive and

that they are compatible with brass, plastic materials of components, and

gas.

Do not use cleaning solutions containing ammonia!

Do not immerse in water or any liquid.

Do not expose to high temperature.

9. LIFETIME OF THE PRODUCT, MAINTENANCE

AND SERVICING

9.1. BATCH NUMBER AND PRODUCTION DATE

The number stamped on the terminal unit body consists of the following

data: GCE logo XXXXXXX

XXXXXXX: batch number

For example: The number 7366506 indicates a product with the batch

number 7366506.

L2

L2 B

TU - connected

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EN

9.1.1. PRODUCT LIFETIME AND WASTE MANAGEMENT

Housing - the maximum lifetime of this part of the product is given by the

lifetime of non-metallic materials used in the device and equals to the

lifetime of materials used in the pipeline distribution system.

Quick connection valve - the maximum lifetime is 10 years. The owner of

the equipment must avoid any repeated use of the product (appropriate

marking, degradation …).

Maintenance, servicing and repairs are described below.

At the end of the product’s life time (max. 10 years), the product must be

withdrawn from service. The owner of the device shall prevent the reuse

of the product and handle the product in compliance with “Directive of

European Parliament and Council 2008/98/EC on waste“.

In accordance to Article 33 of REACH GCE, s.r.o. as responsible

manufacturer shall inform all customers if materials containing 0.1% or

more of substances included in the list of Substance of Very High Concern

(SVHC).

The most commonly used brass alloys used for bodies and other brass

components contain 2-3% of lead (Pb), EC no. 231-468-6, CAS no. 7439-

92-1. The lead will not be released to the gas or surrounding environment

during normal use. After end of life the product shall be scrapped by an

authorized metal recycler to ensure ecient material handling with minimal

impact to environment and health.

To date we have no information that indicates that other materials

containing SVHC of concentrations exceeding 0.1% are included in any

GCE product.

9.2. MAINTENANCE

GCE recommends the product owner to make regular visual inspections

at least once a year, including checks for tightness and right functioning of

the terminal unit (See Chapter 6.2).

If any leakage or defect is found, please use the procedure described in

Chapter 9.3, and ensure execution of the repair by a person authorised

by GCE.

Maximum usability time within the framework of the maintenance shall be

10 years.

Some repairs within the framework of the maintenance concerning

replacement of damaged or missing parts can be carried out by the

product owner. It is possible to replace the following parts only:

• labels

All labels on the product must be kept in a good and legible condition

during the entire product life time.

In order to identify a suitable component please contact our technical

assistance organisation. Users themselves cannot replace the parts with

a CE label without the consent of GCE.

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EN

9.3. SERVICING AND REPAIRS

Repair of TU can only be done by a person that owns appropriate

certiﬁcates according to national standards for mounting and repair of

medical devices, including EN ISO 9170-2, EN ISO 7396-2 and EN ISO

5359 standards.

For more information and actual list of spare parts contact GCE or

distributor of GCE products.

Never dismantle or repair the product if connected to a pressure source.

All seals and O-rings must be kept in dry, dark and clean environment by

the provider and the user during the entire product life time.

Use only original GCE components!

10. GLOSSARY

Consult instruction for

use

Suitable for Hospital

care use

Caution Suitable for Emergency

care use

Keep away from heat and

ﬂammable material REF Reference number

Keep away from oil and

grease LOT Batch code

Humidity limit Fragile, handle with care

Temperature limit Use by date

Date of manufacture Manufacturer

A: Input parameter B: Output parameter

11. WARRANTY

The Standard Warranty period is two years from date of receipt by the

GCE Customer (or if this is not known 2 years from time of the product

manufacture shown on the product).

The standard warranty is only valid for products handled according to

Instruction for use (IFU) and general industry good practice and standards.

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MANUFACTURER:

GCE, s.r.o. Tel : +420 569 661 111

Zizkova 381 Fax : +420 569 661 602

583 01 Chotebor http://www.gcegroup.com

19/56

SV

1. FÖRORD

GCE AGSS-terminalenheter (vidare endast som ”TU AGSS”) är medicintek-

niska produkter som klassiﬁceras som klass IIa enligt direktivet om medi-

cintekniska produkter (93/42/EEG - MDD 2007/47/EG). Överensstämmel-

sen med grundkraven i direktivet 93/42/EEG - MDD 2007/47/EG baseras

på norm EN ISO 9170-2.

2. ANVÄNDNINGSOMRÅDEN

Gasavskiljningssystem för anestesigaser är till för att garantera

patientsäkerheten och för att minimera exponeringen av anestesigaser

och andra gaser för kirurgen och annan personal. De kan innehålla

komponenter för kraftförsörjningar, rörledningssystem, icke förväxlingsbara

komponenter, samt komponenter som förhindrar förväxling vid anslutning

till rörledningar för gasavskiljningssystem (AGSS), medicinska gaser och

vakuum.

3. SÄKERHETSKRAV VID DRIFT, TRANSPORT OCH

FÖRVARING

HÅLL PRODUKTEN, INKL. TILLBEHÖR, BORTOM PÅVERKAN FRÅN

• värmekällor (eld, cigaretter,..)

• brännbara material,

• olja eller fett, (var speciellt försiktig vid användnig av handkrämer)

• vatten,

• damm.

Produkten, inkl. tillbehör, måste vara skyddad mot vältning.

Följ alltid renlighets föreskrifter för syrgas.

Använd endast produkten, inkl. tillbehör, i väl ventilerade utrymmen.

SVENSKA

BRUKSANVISNING: TERMINAL UNITS AGSS

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DRIFTFÖRUTSÄTTNINGAR LAGRING OCH TRANSPORT

-20/+60 °C -30/+70 °C

10/100% 20/70%

600/1200 mbar 600/1200 mbar

Före första användning skall produkten behållas i sitt originalemballage. I

det fall den tas ur drift (för transport, eller förvaring), rekommenderar GCE

att originalemballaget används (inkl. inre utfyllnadsmaterial).

Nationella lagar, kungörelser och föreskrifter för medicinska gaser, arbetar-

skydd och miljö skall följas.

4. INSTRUKTION AV PERSONAL

EU-direktivet 93/42/EEG om medicintekniska produkter föreskriver, att

den som levererar produkten, skall se till att all personal som hanterar

produkten, har tillgång till bruksanvisning och information om tekniska

data.

Använd inte produkten utan att ordentligt känna produkten och hur den

används på ett säkert sätt enligt Bruksanvisningen. Se till att användaren

har kännedom om speciﬁk information och kunskaper gällande den gas

som används.

5. PRODUKTBESKRIVNING

Gasuttagsenheter består av två huvuddelar:

• hus

• snabbkopplingsventil

Enskilda delar måste alltid utformas för samma typ av gas. Vart och ett

av dessa grundläggande delar är markerade med stämpling som visar för

vilken gas det är avsett.

En integrerad del av varje gasuttagsenhet är en backventil som släpper

igenom gasen när en motpart är ansluten men stänger automatiskt och

förhindrar gasen från att passera genom när motparten kopplas bort.

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