prEN 12514-3

SLOVENSKI STANDARD
01-julij-2009
6HVWDYQLGHOLVLVWHPRY]DGRYRGWHNRþHJDJRULYDROMQLPDSDUDWRPGHO
9DUQRVWQH]DKWHYHLQSUHVNXãDQMH9HQWLOLLQãWHYFL
Parts for supply systems for consuming units with liquid fuels - Part 3: Safety
requirements and tests - Valves and meters
Bauelemente für Versorgungsanlagen für Verbrauchsstellen mit flüssigen Brennstoffen -
Teil 3: Sicherheitstechnische Anforderungen und Prüfungen - Armaturen und Zähler
Appareils et éléments de construction pour le transfert au consommateur de liquide
combustible - Partie 3: Prescriptions de sécurité et essais - Armatures et compteurs
Ta slovenski standard je istoveten z: prEN 12514-3 rev
ICS:
27.060.10 *RULOQLNLQDWHNRþHLQWUGR Liquid and solid fuel burners
JRULYR
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2009
ICS 27.060.10 Will supersede EN 12514-1:2000, EN 12514-2:2000
English Version
Parts for supply systems for consuming units with liquid fuels -
Part 3: Safety requirements and tests - Valves and meters
Appareils et éléments de construction pour le transfert au Bauelemente für Versorgungsanlagen für
consommateur de liquide combustible - Partie 3: Verbrauchsstellen mit flüssigen Brennstoffen - Teil 3:
Prescriptions de sécurité et essais - Armatures et Sicherheitstechnische Anforderungen und Prüfungen -
compteurs Armaturen und Zähler
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 47.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12514-3:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .6
4 Safety requirements .6
4.1 General requirements .6
4.1.1 Materials .6
4.1.2 Construction requirements .6
4.1.3 Pressure strength .6
4.1.4 Temperature range .7
4.1.5 Pipeline connections .7
4.1.6 Flow resistance .7
4.1.7 Function .7
4.1.8 Fitness for use .7
4.1.9 External leak-tightness .7
4.1.10 Internal leak-tightness .8
4.1.11 Corrosion resistance .8
4.1.12 Fireproof part .8
4.1.13 Flood proof part .8
4.1.14 Vacuum test .8
4.2 Part related requirements .8
4.2.1 Isolating valve .8
4.2.2 Quick-acting valve .9
4.2.3 Switch-over valve.9
4.2.4 Forced switch-over valve .9
4.2.5 Check valve .9
4.2.6 Pressure compensating device . 10
4.2.7 Discharge valve. 10
4.2.8 Pressure reducer . 11
4.2.9 Filter . 14
4.2.10 Meter . 15
4.2.11 De-aerator . 15
4.2.12 Anti-siphon safety device . 15
4.2.13 Insulating device . 17
4.2.14 Pressure gauge . 17
4.2.15 Vapour/air separator . 18
4.2.16 Pressure control path . 18
4.2.17 Pressure retaining valve . 18
4.2.18 Combined part . 18
4.2.19 Other part . 18
5 Test . 19
5.1 Testing the fitness for use of the parts . 19
5.1.1 General . 19
5.1.2 Testing the fitness for use of manually operated parts . 19
5.1.3 Testing the fitness for use of check valves . 19
5.1.4 Testing the fitness for use of pressure compensating devices . 20
5.1.5 Testing the fitness for use of discharge valves . 20
5.1.6 Testing the fitness for use of pressure reducers . 20
5.1.7 Testing the fitness for use of de-aerators . 21
5.1.8 Testing the fitness for use of mechanical anti-siphon safety devices . 21
5.1.9 Testing the fitness for use of pressure retaining valve . 23
5.2 Testing of the pressure compensating device . 23
5.3 Testing of the discharge valve . 24
5.3.1 Type testing . 24
5.3.2 Factory production control. 25
5.4 Testing of the pressure reducer . 25
5.4.1 Pressure strength test . 25
5.4.2 External leak-tightness test . 26
5.4.3 Internal leak-tightness test . 26
5.4.4 Functional test of the pressure reducer . 26
5.5 Type testing of the filter . 28
5.5.1 Testing of the differential pressure . 28
5.5.2 Testing on the side of the return pipeline of a filter for two-pipe systems . 28
5.5.3 Testing of the manual venting of the return pipeline . 29
5.5.4 Testing of the flow resistance . 29
5.6 Type testing of the de-aerator . 29
5.7 Testing of the mechanical anti-siphon safety device . 31
5.7.1 Testing of the anti-siphon function . 31
5.7.2 Pressure strength test . 33
5.7.3 External leak-tightness test . 33
5.7.4 Flow resistance test . 34
5.7.5 Testing of the pressure relief of mechanical anti-siphon safety devices . 34
5.7.6 Internal leak-tightness test . 34
5.8 Testing of the pressure relief of electro-mechanical anti-siphon safety devices . 34
5.9 Testing of insulating devices . 35
5.10 Testing of pressure retaining valve . 35
5.10.1 Type testing . 35
5.10.2 Factory production control. 36
5.11 Evaluation of conformity . 36
6 Marking, packaging, and instructions . 37
6.1 General . 37
6.2 Marking . 37
6.3 Instruction for installation, maintenance, and operation . 37
Bibliography . 39

Foreword
This document (prEN 12514-3:2009) has been prepared by Technical Committee CEN/TC 47 “Atomizing oil
burners and their components – Function – Safety – Testing”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12514-1:2000, EN 12514-2:2000.
According to edition 2000 the following fundamental changes are given:
 standards new structured;
 new parts for supply systems included;
 technical requirements revised;
 number of cycles for the fitness-for-use test added;
 requirements for flood proof parts included;
 marking, packing and instructions revised;
 harmonization of the standard to Measuring Instruments Directive (MID) 2004/22/EC.
This standard consists of 4 Parts:
Parts for supply systems for consuming units with liquid fuels
Part 1: Safety requirements and tests — Terminology, general requirements
Part 2: Safety requirements and tests — Feed pumps, control and safety devices, service vessels
Part 3: Safety requirements and tests — Valves and meters
Part 4: Safety requirements and tests — Pipings and parts within pipelines
1 Scope
This European Standard applies to the following parts of supply systems for the automatic liquid fuel supply of
consuming units from one or more tanks:
a) isolating valve;
b) quick-acting valve;
c) switch-over valve;
d) forced switch-over valve;
e) check valve;
f) pressure compensating device;
g) discharge valve;
h) pressure reducer;
i) filter;
j) meter;
k) de-aerator;
l) anti-siphon safety device;
m) pressure retaining device;
n) isolation device;
o) pressure gauge;
p) vapour/air separator;
q) pressure control path;
r) combined part
s) other part.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 293, Oil pressure atomizing nozzles — Minimum requirements — Testing
EN 837-1, Pressure gauges — Part 1: Bourdon hose pressure gauges; dimensions, metrology, requirements
and testing
EN 837-2, Pressure gauges — Part 2: Selection and installation recommendations for pressure gauges
EN 837-3, Pressure gauges — Part 3: Diaphragm and capsule pressure gauges; dimensions, metrology,
requirements and testing
EN 1267, Valves — Test of flow resistance using water as test fluid
EN 12266-1:2003, Industrial valves — Testing of valves — Part 1: Pressure tests, test procedures and
acceptance criteria — Mandatory requirements
EN 12266-2:2002, Industrial valves — Testing of valves — Part 2: Tests, test procedures and acceptance
criteria; Supplementary requirements
prEN 12514-1:2009, Parts for supply systems for consuming units with liquid fuel — Part 1: Safety
requirements and tests — Terminology, general requirements
prEN 12514-4, Parts for supply systems for consuming units with liquid fuel — Part 4: Safety requirements
and tests — Pipework and parts within pipes
EN 13636, Cathodic protection of buried metallic tanks and related piping
EN 14505, Cathodic protection of complex structures
EN ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests (ISO 9227:2006)
ISO 23553-1:2007, Safety and control devices for oil burners and oil-burning appliances — Particular
requirements — Part 1: Shut-off devices for oil burners
OIML R 117-1:2007, Dynamic measuring systems for liquids other than water — Part 1: Metrological and
technical requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in prEN 12514-1 apply.
4 Safety requirements
4.1 General requirements
4.1.1 Materials
According to prEN 12514-1.
Test according to annex D.3 of prEN 12514-1:2009.
4.1.2 Construction requirements
According to prEN 12514-1.
Test according to annex D.3 of prEN 12514-1:2009.
4.1.3 Pressure strength
According to prEN 12514-1.
Test according to annex D.1 of prEN 12514-1:2009.
Additional testing for thermoplastic materials according to annex C of prEN 12514-1:2009.
4.1.4 Temperature range
According to prEN 12514-1.
Test according to annex D.3 of prEN 12514-1:2009.
Additional testing for parts designed for t = -20 °C according to annex F of prEN 12514-1:2009.
s,min
Additional testing for thermoplastic materials according to annex C of prEN 12514-1:2009.
4.1.5 Pipeline connections
According to prEN 12514-4.
Test according to annex D.3 of prEN 12514-1:2009 and prEN 12514-4.
4.1.6 Flow resistance
The differential pressure of the part shall be declared by the manufacturer as a function of the flow rate of the
intended liquid fuel at a temperature of (20 ± 5) °C, preferably as flow rate coefficient, K , according to
v
EN 1267.
Type testing according to EN 1267.
4.1.7 Function
The part related functions according to 4.2 shall be demonstrated according to clause 5:
 during the type testing, prior and after the fitness-for-use test according to 4.1.8;
 during the factory production control.
4.1.8 Fitness for use
The fitness-for-use test shall be conducted during type testing.
For the part related number of cycles, refer to 4.2.
The fitness-for-use test shall be carried out at a test temperature t = (20 ± 5) °C.
t
Test according to 5.1.
4.1.9 External leak-tightness
The external leak-tightness test shall be carried out:
 During the type testing, after the fitness-for-use test;
 during the factory production control.
No visible leakage.
Test according to annex D.2 of prEN 12514-1:2009.
4.1.10 Internal leak-tightness
The internal leak-tightness needs to be demonstrated for parts with shut-off function only.
The internal leak-tightness test shall be carried out:
 during the type testing, after the fitness-for-use test;
 during the factory production control.
The leakage rate for parts with shut-off function shall not exceed leakage rate B of EN 12266-1 when in the
closed position.
Seat tightness test, test P12 – EN 12266-1:2003.
NOTE As the allowable differential pressure according to EN 12266-1, the maximum allowable pressure p shall be
s
used.
4.1.11 Corrosion resistance
Parts intended for use outside buildings shall be resistant to or protected against corrosion.
The suitability of the corrosion protection shall be demonstrated by a test carried out as part of the type
testing: neutral salt spray test (NSS) according to EN ISO 9227 with a test duration of 96 h.
After this test, it shall be demonstrated by visual inspection that the parts required for operation according to
the specifications do not show any signs of corrosion; salt residues due to the test shall be neglected.
Following this, the part related functions according to 4.2 shall be verified.
4.1.12 Fireproof part
According to 4.6 of prEN 12514-1:2009.
Type testing according to annex D.4 of prEN 12514-1:2009.
4.1.13 Flood proof part
According to 4.7 of prEN 12514-1:2009.
Type testing according to annex D.5 of prEN 12514-1:2009.
4.1.14 Vacuum test
The vacuum test shall be carried out as part of the type testing of parts which may be subject to vacuum, in
order to demonstrate their pressure strength and external leak-tightness.
Type testing according to annex D.6 of prEN 12514-1:2009.
4.2 Part related requirements
4.2.1 Isolating valve
An isolating valve directly exposed to the operating cycles of the consuming unit shall withstand
250 000 cycles.
A manually operated isolating valve shall withstand 1 000 cycles.
Fitness-for-use test according to 5.1.2.
4.2.2 Quick-acting valve
The quick-acting valve shall only allow a completely opened or closed position, but no throttle position.
The open or closed position shall be visible.
Quick-acting valves for remote controlled mechanical operation shall, at the operating element, be provided
with a drilled hole of at least 2 mm.
A quick-acting valve directly exposed to the operating cycles of the consuming unit shall withstand
250 000 cycles.
A manually operated quick-acting valve shall withstand 1 000 cycles.
Fitness-for-use test according to 5.1.2.
4.2.3 Switch-over valve
The outlet of a switch-over valve shall be connected only with one inlet and shall be leak tight against the
other inlet.
The respective adjusted position shall be visible.
A manually operated switch-over valve shall withstand 1 000 cycles.
Fitness-for-use test according to 5.1.2.
4.2.4 Forced switch-over valve
The forced switch-over valve shall be adjustable only in a way where on the inlet side only one adjoined outlet
connection (e. g. return flow) is opened for the flow from each adjustable inlet connection (e. g. forward flow).
The respective position shall be visible and be protected against unintentional adjustment (e. g. by engaging).
A manually operated forced switch-over valve shall withstand 1 000 cycles.
Fitness-for-use test according to 5.1.2.
4.2.5 Check valve
The check valve shall prevent decrease of the fuel column.
The leakage rate shall not exceed leakage rate B of EN 12266-2.
Testing of the backseal, test P21 – EN 12266-2:2002.
A test pressure of 0,1 bar according to EN 12266-2 shall be used.
The check valve shall withstand 250 000 cycles.
Fitness-for-use test according to 5.1.3.
4.2.6 Pressure compensating device
A pressure compensating device shall, by providing additional volume, limit the pressure build-up in defined
closed pipeline sections due to temperature related volume changes of the liquid fuel, without a draining-off of
fuel from the closed pipelines.
NOTE Reference to a method for the calculation of the pressure build-up in defined closed pipe sections can be
found in the bibliography.
The manufacturer of the pressure compensating device shall give the following information:
 minimum operating pressure p at which the pressure compensating device responds;
o,min
 maximum allowable operating pressure p (≤ p );
o,max s
 volume V which can be compensated between the minimum operating pressure p and the
p,o o,min
maximum operating pressure p .
o,max
A pressure compensating device shall be able to indicate the range between the minimum operating pressure
p and the maximum operating pressure p .
o,min o,max
A pressure compensating device shall withstand 1 000 cycles between the minimum operating pressure and
the maximum allowable operating pressure.
Fitness-for-use test according to 5.1.4 and functional test according to 5.2.
4.2.7 Discharge valve
The discharge valve shall prevent an excess of the maximum allowable pressure p or a specified operating
s
pressure p . It shall open at a specified pressure and remain in the open position when a pressure to be
o,max
declared is reached. If the pressure required for the opening of the discharge valve is not reached, it shall
close again to a tight seal.
Adjustable discharge valves shall be combined with a pressure gauge for the indication of the set response
pressure p . The pressure gauge is not necessary if the set response pressure p is represented by a
o,r o,r
marking with numbers. Its adjustment shall not change automatically and shall only be possible by means of
tools. Unauthorized adjustment shall be visible (e. g. by a lacquer layer or a lead seal).
The manufacturer shall give the following information:
&
 nominal flow rate V at nominal response pressure p in the open position;
n o,r,n
 response pressure p at which the discharge valve opens;
o,r
 nominal response pressure p at which the discharge valve is in the fully open position;
o,r,n
 lock-up pressure p at which the discharge valve closes to a tight seal.
o,l
For a safe draining-off of the liquid fuel, a pipeline connection for a return pipeline shall be provided. The
diameter of the pipeline connection at the outlet shall not be smaller than the one at the inlet.
An discharge valve shall withstand 250 000 cycles between the pressure p and the pressure p .
o,max o,l
Fitness-for-use test according to 5.1.5 and functional test according to 5.3.
4.2.8 Pressure reducer
4.2.8.1 Design requirements for pressure reducers
4.2.8.1.1 General design of a mechanical pressure reducer
The general design of a mechanical pressure reducer is shown in Figure 1.
The schematic illustration represents an example; other construction properties are possible.
Key
1 pressure sensing
2 closure member
3 cover
4 actuator (mechanical)
5 breather hole
Figure 1 — General design of a mechanical pressure reducer
including the essential components
4.2.8.1.2 General
The body and cover of a pressure reducer shall be so assembled as to ensure that they cannot be separated
without permanent damage to components or sealing.
The functioning of pressure reducers shall be ensured within the range of guaranteed flow rate stated by the
manufacturer.
During operation, the pressure reducer shall meet the requirements of 4.2.8.2 for the mounting positions
specified by the manufacturer in his instructions for installation, maintenance and operation. In all other
mounting positions, the pressure reducer only needs to meet the closing requirements.
The setting of pre-set pressure reducers shall not be altered by the operator.
If the outlet pressure of an adjustable pressure reducer is set by a rotating movement, the higher outlet
pressure value shall be reached in the clockwise direction.
Adjustable pressure reducers shall be combined with a pressure gauge for indicating the outlet pressure. The
pressure gauge is not necessary if the set outlet pressure is represented by a marking with numbers.
4.2.8.1.3 Closure member
At zero flow, the closure member shall act as an isolating device between the area subject to inlet pressure
and the area subject to outlet pressure.
After the test specified in 5.4.1.3, the closure member shall not be moved or displaced from its position within
the body.
4.2.8.1.4 Cover
The contact faces of cover and body shall be designed such that the diaphragm is retained in the body and
passes the pressure test according to 5.4.1.
Breather holes shall be designed such that the diaphragm cannot be damaged when a check pin gauge with a
diameter of 1,5 mm is passed through this orifice.
4.2.8.2 Functional and constructional characteristics of pressure reducers
4.2.8.2.1 Pre-set pressure reducer with a nominal outlet pressure p = 100 mbar
o,o,n
At an inlet pressure p between 0,5 bar and 6,0 bar, a pre-set pressure reducer with a specified nominal
o,i
outlet pressure p = 100 mbar shall ensure the following outlet pressures p for the guaranteed flow rate:
o,o,n o,o
&
Lock-up flow rate V: p ≤ 220 mbar
l o,o,l
&
Operating flow rate V: p = 200 mbar
o o,o,max
p = 100 mbar
o,o,min
4.2.8.2.2 Pre-set pressure reducer with a specified nominal outlet pressure p
o,o,n
At an inlet pressure p between 0,5 bar and p , a pre-set pressure reducer with a specified nominal outlet
o,i s
pressure, except according to 4.2.8.2.1, shall ensure the following outlet pressures p for the guaranteed
o,o
flow rate:
&
Lock-up flow rate V: p ≤ 2,5 × p
l o,o,l o,o,n
&
Operating flow rate V: p = 1,5 × p
o o,o,max o,o,n
p = 0,7 × p
o,o,min o,o,n
4.2.8.2.3 Adjustable pressure reducer
At an inlet pressure p between 0,5 bar and p , an adjustable pressure reducer shall ensure the following
o,i s
outlet pressures in the adjustable range between minimum and maximum nominal outlet pressure for the
guaranteed flow rate:
Minimum nominal outlet pressure p
o,o,n,min
&
Lock-up flow rate V : p ≤ 2,5 × p
l
o,o,l o,o,n,min
&
Operating flow rate V : p = 1,5 × p
o
o,o,max o,o,n,min
p = 0,7 × p
o,o,min o,o,n,min
Maximum nominal outlet pressure p
o,o,n,max
&
Lock-up flow rate V : p ≤ 2,5 × p
l
o,o,l o,o,n,max
&
Operating flow rate V : p = 1,5 × p
o
o,o,max o,o,n,max
p = 0,7 × p
o,o,max o,o,n,max
4.2.8.2.4 Other pressure reducers
For pressure reducers with deviating inlet pressures p between 0,5 bar and p , the requirements of 4.2.8.2.2
o,i s
and 4.2.8.2.3 apply accordingly.
If the outlet pressure range is exceeded, this shall be indicated.
4.2.8.3 Tests
Pressure strength test according to 5.4.1.
External leak-tightness test according to 5.4.2 and internal leak-tightness test according to 5.4.3.
Functional test according to 5.4.4.
A pressure reducer shall withstand 250 000 cycles between opening and complete closing of the closure
member. Fitness-for-use test according to 5.1.6.
4.2.9 Filter
Filters for single-pipe systems with return pipeline shall be equipped with a device which enables a pressure
of -0,5 bar on the suction pipeline side. The differential pressure between return and feed pipeline shall not
&
exceed 1,5 bar at a flow rate V to be declared by the manufacturer. Test according to 5.5.1.
n,R
Also, filters for single-pipe systems with return pipeline shall be provided with a further device for manual
venting of the return pipeline for commissioning and maintenance purposes only. Test according to 5.5.3.
Filters for two-pipe systems shall be equipped with a check valve on the side of the return pipeline. This check
valve only needs to meet the leakage rate requirements of 4.2.5. The differential pressure between the
connection of the return pipeline from the consuming unit and the connection of the return pipeline to the tank
&
shall not exceed 1,0 bar at a flow rate V to be declared by the manufacturer. Test according to 5.5.2.
n,R
A filter that can be opened for the replacement of the filter element, shall be tight when closed again.
The filter shall retain foreign matter with a particle size > 0,2mm. This requirement has been met when the
check pin gauge with a diameter of 0,2 mm cannot pass through the mesh openings of the filter element. The
manufacturer shall provide information regarding the filtration grade of the filter element.
NOTE 1 The selection of the filtration grade of a filter element depends on the downstream parts to be protected.
NOTE 2 Geometrical data for filter elements may be derived from, for example ISO 565, ISO 3310-1 to -3, ISO 4782,
ISO 4783-1, ISO 4393 and ISO 9044.
The filter shall meet the requirement of 4.1.6, if 50 % of the filter surface is covered. Flow resistance test
according to 5.5.4.
In the case of a combined part consisting of filter and isolating valve, the isolating valve shall be the positioned
first in the flow direction.
4.2.10 Meter
4.2.10.1 General
Meters complying with prEN 12514-3 are:
 meters for measurement systems with the required parts for a accurate measurement according to the
regulations and complying with Directive 2004/22 EC on Measuring devices;
 meters for recording the supply without the required parts for a accurate measurement according to the
regulations and complying with Directive 2004/22 EC on Measuring devices
4.2.10.2 Meters for recording the supply
According to the application of the meters the accuracy shall meet the requirements of Directive 2004/22/EC
for accuracy class 0,5 or 1,0.
Functional test according to OIML R 117-1:2007.
4.2.11 De-aerator
De-aerators shall be able to operate without liquid fuel leakage.
De-aerators shall preferably be designed for single-pipe systems with return pipeline. De-aerator shall not block
&
the return of the liquid fuel. Nominal flow rate V and venting capacity shall be declared by the manufacturer.
n
The venting capacity shall be based on 30 % of the nominal flow rate.
Functional test according to 5.6.
De-aerators shall be equipped with a device which enables a pressure of -0,5 bar on the side of suction
pipeline. The differential pressure between return and feed pipeline shall not exceed 1,5 bar at a flow rate
&
V to be declared by the manufacturer. Test according to 5.5.1.
n,R
A de-aerator shall withstand 250 000 cycles.
Fitness-for-use test according to 5.1.7.
4.2.12 Anti-siphon safety device
4.2.12.1 General
Anti-siphon safety devices shall prevent leakage of liquid fuel below the declared or adjusted safety height h .
A
During operation, the anti-siphon safety device shall meet the requirements specified in 4.2.12 when installed
in the mounting positions specified by the manufacturer in his instructions for installation, maintenance and
operation.
Anti-siphon safety devices can be distinguished by 2 constructional characteristics:
 mechanical anti-siphon safety devices as automatic devices without auxiliary energy; or
 electro-mechanical anti-siphon safety devices which operate by shut-down of the auxiliary energy at an
automatically closing control valve.
4.2.12.2 Mechanical anti-siphon safety device
4.2.12.2.1 Requirements
Mechanical anti-siphon safety devices are suitable for use in suction pipelines only.
The mechanical anti-siphon safety devices can be distinguished by 2 constructional characteristics:
h ;
 pre-set to the safety height
A
 adjustable for the variable regulating safety height h .
A
The effective vacuum of the liquid column of the anti-siphon safety device (p ) shall be determined using
o,g
equation (1).
ρ ⋅ g ⋅ h
fuel g
p = ×(−1) , in mbar (1)
o,g
Where
ρ is the maximum density of the liquid fuel, in kg/m
fuel
g is the acceleration of gravity (9,81 m/s )
h is the geodetic height of the liquid column of the liquid fuel, in m
g
The outlet pressure p shall be within the range according to equation (2).
o,o
p = (p - 5 mbar) to (p - 100 mbar) (2)
o,o o,g o,g
The outlet pressure p of adjustable anti-siphon safety devices shall be checked for the highest set value for
o,o
the variable regulating safety height h at nominal flow rate.
A
The mechanical anti-siphon safety device shall open in the reverse flow direction based on an inlet pressure
of 0 bar at a response pressure p within a range between 0,5 bar and 5 bar.
o,r
NOTE The opening of anti-siphon safety devices in the reverse flow direction is designated as pressure relief.
Breather holes shall be designed such that a check pin gauge with a diameter of 1,5 mm passed through the
orifice cannot damage the diaphragm.
The body and cover of a anti-siphon safety device pressure reducer shall be so assembled as to ensure that
they cannot be separated without permanent damage to components or sealing.
Adjustable anti-siphon safety devices shall be provided with a marking with numbers or a scale, for the setting
of the safety height.
Once set, the value of the safety height of adjustable mechanical anti-siphon safety devices shall be protected
against alteration after installation.
NOTE A sealing is sufficient for protection against alteration.
4.2.12.2.2 Tests
Test of the anti-siphon function according to 5.7.1.
Pressure strength test according to 5.7.2.
External leak-tightness test according to 5.7.3.
Flow resistance test according to 5.7.4.
Pressure relief test according to 5.7.5.
Internal leak-tightness test according to 5.7.6.
A mechanical anti-siphon safety device shall withstand 250 000 cycles. Fitness-for-use test according to 5.1.8.
4.2.12.3 Electro-mechanical anti-siphon safety device
An electro-mechanical anti-siphon safety device shall be designed and tested as a safety shut-off device
according to ISO 23553-1. The following requirements of ISO 23553-1 shall be met:
 design "nc";
 group 2 controls.
Instead of the integrated filter element with a maximum mesh size of 0,5 mm according to 6.4.8 of
ISO 23553-1:2007, an upstream filter complying with 4.2.9 having the corresponding filtration grade may be
used.
The electro-mechanical anti-siphon safety device shall open in the reverse flow direction based on an inlet
pressure of 0 bar at a response pressure p within a range between 0,5 bar and 5 bar.
o,r
NOTE The opening of anti-siphon safety devices in the reverse flow direction is designated as pressure relief.
Pressure relief test according to 5.8.
Test of the anti-siphon function in analogy to 5.7.1.
4.2.13 Insulating device
Insulating devices shall
 ensure electrical insulation between the object with cathodic protection in the sense of EN 13636 and
other objects directly connected to general earthing systems; this includes earthed electrical equipment;
 ensure electrical insulation between the object with cathodic protection in the sense of EN 13636, and
objects with cathodic protection in the sense of DIN EN 14505 (e. g. insulation of tank systems or
pipelines in supply systems with different cathodic protection).
NOTE 1 Requirements for insulating devices in systems of cathodic corrosion protection are defined in EN 12954,
EN 13636 and EN 14505.
NOTE 2 For electrical insulation and terms of cathodic corrosion protection, refer to EN 12954.
The requirements for electrical insulation shall be verified by a voltage proof test during the type testing
according to 5.9.
4.2.14 Pressure gauge
Pressure gauges complying with EN 837-1 and EN 837-3 shall be selected according to EN 837-2. The
following requirements shall be met:
 accuracy class of at least 2,5;
 the indication range for pressure pipelines shall be selected such that the end value of the scale is
≥ 1,5 × p ;
s
 the safety design S1 with relief orifice shall not be used;
 the thread of the male pressure connection shall be designed according to prEN 12514-4.
Test according to EN 837-1 or EN 837-3.
For pressure gauges with other constructional and functional characteristics, the requirements of EN 837-2
apply accordingly.
4.2.15 Vapour/air separator
Requirements only according to 4.1
4.2.16 Pressure control path
A pressure control path as combined part shall meet all safety requirements for the single parts according to
clause 4, and shall be tested as one part according to its function in compliance with the specifications of
clauses 4 and 5.
NOTE Example for a pressure control path see Figure 11 of prEN 12514-1:2009
4.2.17 Pressure retaining valve
The pressure retaining valve shall prevent an underrun of a specified operating pressure p . It shall close if the
o
set response pressure p is fallen.
o,r
Adjustable pressure retaining valves shall be combined with a pressure gauge for the indication of the set
response pressure p . The pressure gauge is not necessary if the set response pressure p is represented
o,r o,r
by a marking with numbers. Its adjustment shall not change automatically and shall only be possible by means
of tools. Unauthorized adjustment shall be visible (e. g. by a lacquer layer or a lead seal).
The manufacturer shall give the following information:
&
 nominal flow rate V at response pressure p ;
o,r
n
& &
 minimum flow rate V and maximum flow rate V .
o,min o,max
A pressure retaining valve shall withstand 250 000 cycles.
Fitness-for-use test according to 5.1.9 and functional test according to 5.10
4.2.18 Combined part
Combined parts shall meet all safety requirements for the single parts according to clause 4, and are tested as
one part according to thei
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