Emerson Tartarini V Series User manual

V Series
Instruction Manual
D103666X012
January 2015 - Rev. 00
TM
SUMMARY
Introduction ........................................................................ 1
SEP Statement .................................................................. 1
P.E.D. Categories and Fluid Group ................................... 2
Characteristics ................................................................... 2
Labelling ............................................................................ 2
Overpressure Protection .................................................... 3
Transport and Handling ..................................................... 3
Atex Requirements ............................................................ 3
Operation ........................................................................... 3
Dimensions and Weights ................................................... 4
Installation ......................................................................... 5
Startup ............................................................................... 5
Setting ............................................................................... 5
Shutdown ........................................................................... 6
Periodical Checks .............................................................. 6
Maintenance ...................................................................... 6
Spare Parts ........................................................................ 7
Troubleshooting ................................................................. 7
Parts Lists .......................................................................... 8
Schematic Assemblies ....................................................... 9
INTRODUCTION
Scope of Manual
This manual provides instructions for installation, startup,
maintenance and spare parts ordering for the V Series
spring-loaded relief valves.
This product has been designed to be used with fuel gases of
1st and 2nd family according to EN 437, and with other non
aggressive and non fuel gases. For any other gases, other
than natural gas, please contact your local sales agent.
SEP STATEMENT
Emerson Process Management declares this product (V/50
and V/20-2) conforms to Pressure Equipment Directive
(PED) 97/23/EC Article 3 section 3 and was designed
and manufactured in accordance with sound engineering
practice (SEP).
Per Article 3 section 3, this “SEP” product must not bear the
CE marking.
Product Description
The V Series are spring-loaded automatic type relief valves.
They are used in reduction, distribution and conveying
stations using suitably ltered natural gas.
They can also be used for air, propane, butane, LPG, city
gas, nitrogen, carbon dioxide.
The following versions are available:
V/50 and V/60 : for very low pressure applications
V/51 and V/61 : for low pressure applications
V/52 and V/62 : for middle pressure applications
V/20-2 : for high pressure applications
All standard gas pressure devices (relief valves) used
in assemblies will comply to EN 12186 and EN 12279
standards.
Relief Valves
Figure 1. Relief Valves V/50, V/60 Series and Type V/20-2

V Series
2
P.E.D. CATEGORIES AND FLUID GROUP
The V Series relief valves are designed as functional
equipments and they are typically used in gas pressure
reducing stations for overpressure protection by releasing
small amounts of gas in the event of not perfect pressure
relief valve closing.
Table 1. P.E.D. Category for V Series Relief Valves
TYPE CATEGORY FLUID GROUP
V/50 - V/51 - V/52 SEP
1V/60 - V/61 - V/62 I
V/20-2 SEP
If V series relief valve is used as full-capacity relief
device (according clause 8.3.2 EN 12186) , downstream
equipments protected by this products shall have technical
features such as not to be category higher than following
category (according Directive 97/23/EC “PED”).
CHARACTERISTICS
End Connection Styles
V/50 Series
1” x 1 1/2” GAS
V/60 Series
1 1/2” x 2” GAS
Type V/20-2
1” x 1” NPT
!
WARNING
The pressure/temperature limits indicated
in this instruction manual or any applicable
standard or code limitation should not be
exceeded.
Maximum Allowable Pressure
V/50 Series: 4 bar
V/60 Series: 2.5 bar
Type V/20-2: 100 bar
Outlet Set Pressure Ranges
V/50 Series: 0.025 ÷ 2 bar
V/60 Series: 0.025 ÷ 2 bar
Type V/20-2: 1.5 ÷ 40 bar
Minimum/Maximum Allowable Temperature (TS)
See label
Temperature
Standard Version : Working -10° to 60°C
Low Temperature Version : Working -20° to 60°C
Materials
V/50 and V/60 Series
Body / cover : Aluminium
Seat : Brass
Diaphragms : Fabric Nitrile (NBR) + PVC
Pads : Nitrile (NBR) rubber
Type V/20-2
Body : Brass
Pad retainer : Brass
Pad holder : Brass
Adjusting nut : Brass
Pad : Nitrile (NBR) rubber
LABELLING
APPARECCHIO TIPO /DEVICE TYPE
Wau
DN2
DN1
MATRICOLA
bar
bar
SERIALNr.
°C
FLUIDO GRUPPO
FLUIDGROUP
ANNO
YEAR
HARMONIZEDSTD.
bar
NORMEARMONIZ.
LEAKAGECLASS
CLASSEDI PERDITA
FUNCTIONALCLASS
CLASSEFUNZIONALE bar
Wao
Wa
TS
bar
pao
Cg
PS
body bar PT
=x
PS bar
PS
covers
EN
bar
pmax
xxxx
body
Notified
BOLOGNAITALY
O.M.T.
1.5Note 4Note 3
Note2
Note 1
1
-
Figure 2. Label for V Series Relief Valves
Note 1: See “Characteristics”
Note 2: Year of manufacture
Note 3: Class 1: -10°/60°C
Class 2: -20°/60°C
Note 4: V/50 Series : 4 bar
V/60 Series : 2.5 bar
Type V/20-2 : 100 bar

V Series
3
OVERPRESSURE PROTECTION
The recommended safety pressure limitations are stamped
on the valve label.
Downstream overpressure protection shall be also provided
if the inlet pressure can be greater than the PS (see label).
Equipment’s operation below the maximum pressure
limitations does not preclude the possibility of damage from
external sources or debris in the line.
The relief valve should be inspected for damage after any
overpressure condition.
TRANSPORT AND HANDLING
Established transport and handling procedures shall be
followed to avoid any damage on the pressure containing
parts by shocks or anomalous stresses.
Ringbolts are designed just for handling of equipment
weight.
Built-up sensing lines and pressure accessories (e.g. pilots)
shall to be protected by shocks or anomalous stresses.
ATEX REQUIREMENTS
If the provisions of EN 12186 & EN 12279, national
regulations, if any, and specic manufacturer
recommendations are not put into practice before
installation and if purge by inert gas is not carried out before
equipment’s start-up and shut-down operations, a potential
external and internal explosive atmosphere can be present
in equipment & gas pressure regulating/measuring stations/
installations.
If a presence of foreign material in the pipelines is foreseen
and purge by inert gas is not carried out, the following
procedure is recommended to avoid any possible external
ignition source inside the equipment due to mechanical
generated sparks:
• drainage to safe area via drain lines of foreign materials, if
any, by inow of fuel gas with low velocity in the pipe-work
(5m/sec)
In any case,
• provisions of Directive 1999/92/EC and 89/655/EC shall
be enforced by gas pressure regulating/measuring station/
installation’s end user
• with a view to preventing and providing protection against
explosions, technical and/or organizational measures
appropriate to the nature of the operation shall be taken
(e.g. : lling/exhausting of fuel gas of internal volume
of the isolated part/entire installation with vent lines
to safe area - 7.5.2 of EN 12186 & 7.4 of EN 12279 ;
monitoring of settings with further exhaust of fuel gas to
safe area ; connection of isolated part/entire installation to
downstream pipeline; ….)
• provision in 9.3 of EN 12186 & 12279 shall be enforced
by pressure regulating/measuring station/installation’s end
user
• external tightness test shall be carried out after each
reassembly at installation site using testing pressure in
accordance with national rules
• periodical check/maintenance for surveillance shall be
carried out complying with national regulations, if any, and
specic manufacturer recommendations.
OPERATION
V/50 and V/60 Series
M
G
D
S
Figure 3. Closed V/50 Relief Valve
Whenever gas pressure under diaphragm (D) is higher than
the force exerted by spring (M), diaphragm is raised causing
sleeve (O), which is integral with the diaphragm itself, to
move and thereby open the release orice.
In order to check the efciency of the relief valve, pull up
valve opening stem (S).
Valve setting is carried out by adjusting the compression of
spring (M) through the appropriate ring (G).
Valve set point should generally be at an intermediate value
between active regulator or monitor and slam-shut valve
(if tted) set points.
In all other cases, it is recommended that relief valve be set
at a value at least 15% higher than the working pressure of
the equipment.

V Series
4
Type V/20-2
M
O
P
G
Figure 4. Closed V/20-2 Relief Valve
Whenever gas pressure under pad (O) is higher than
the force exerted by spring (M) in the opposite direction,
pad older device (P) is raised, thereby causing the release
orice to open.
Setting is carried out by adjusting the compression of spring
(M) through the appropriate ring (G).
It is recommended that relief valve be set at a value at least
15% higher than the operating pressure of the station.
DIMENSIONS AND WEIGHTS
V/50 and V/60 Series
Table 2. V Series Dimensions (mm)
TYPE V/50 SERIES V/60 SERIES
A 236 258
B 164 198
C 43 70
D 95 110
Weight (Kg) 1,3 1,9
Ø B
D
A
C
Figure 5. V/50 and V/60 Series Dimensions
Type V/20-2
63,5
133
Figure 6. Type V/20-2 Dimensions (mm)
Valve Weight 1.6 Kg

V Series
5
INSTALLATION
• Ensure that the data found on the valve label are
compatible with usage requirements.
• Ensure that the valve is mounted in accordance with the
direction of ow indicated by the arrow.
!
WARNING
Only qualied personnel should install or
service a relief valve.
Relief valves should be installed, operated,
and maintained in accordance with
international and applicable codes and
regulations.
Failure to take the relief valve out of service
immediately may create a hazardous
condition.
Personal injury, equipment damage, or
leakage due to escaping uid or bursting of
pressure-containing parts may result if this
relief valve is over-pressured or is installed
where service conditions could exceed the
limits given in the Specications section, or
where conditions exceed any ratings of the
adjacent piping or piping connections.
To avoid such injury or damage, provide
pressure-limiting devices (as required by the
appropriate code, regulation, or standard) to
prevent service conditions from exceeding
limits.
Additionally, physical damage to the relief
valve could result in personal injury and
property damage due to escaping uid.
To avoid such injury and damage, install the
relief valve in a safe location.
Before installation, check shall be done if
service conditions are consistent with use
limitations.
All means for draining must be provided in
the equipment installed before relief valves
(ENs 12186 & 12279).
If using a V series relief valve on hazardous
or ammable gas service, personal injury
and property damage could occur due to re
or explosion of vented gas that may have
accumulated.
To prevent such injury or damage, provide
piping or tubing to vent the gas to a safe,
well-ventilated area in accordance also
with international and applicable codes and
regulations.
In particular, when venting a hazardous gas,
the piping or tubing should be located far
enough away from any buildings or windows
so to not create a further hazard, and the
vent opening should be protected against
anything that could clog it.
If installing the relief valve at an outside
location, adequate protection, such as rain
caps or elbow piping, must be attached
to the outlet to keep the relief valve from
getting plugged or from collecting moisture,
corrosive chemicals, or other foreign
materials.
For outdoor installations, the relief valve
should be located away from vehicular
trafc
.
Further the ENs 12186 & 12279, where this product is used:
• provide the cathodic protection and electrical isolation to
avoid any corrosion and
• in accordance with clause 7.3/7.2 of aforesaid
standards, the gas shall be cleaned by proper lters/
separators/scrubbers to avoid any technical &
reasonable hazard of erosion or abrasion for pressure
containing parts
START-UP
The relief valve’s spring is factory set at approximately the
midpoint of the spring range or the pressure requested, so
an initial adjustment may be required to give the desired
results.
With proper installation completed and system equipment
properly adjusted, slowly open the upstream shut-off device
while using pressure gauges to monitor pressure.
SETTING
To change the set-points, remove the vent line (type V/20-2)
or spring closing cap (V/50 and V/60 series) and turn the
adjusting screws clockwise to increase outlet pressure or
counter-clockwise to decrease pressures.
Monitor the outlet pressure with a test gauge during the
adjustment.
Replace the vent line and closing cap to maintain the
desired setting.

V Series
6
SHUTDOWN
!
WARNING
To avoid personal injury resulting from
sudden release of pressure, isolate the relief
valve from all pressure before attempting
disassembly and release trapped pressure
from the equipment and pressure line.
In case of disassembly of main pressure
retaining parts for checks and maintenance
procedures, external and internal tightness
tests have to be done according applicable
codes.
PERIODICAL CHECKS
CAUTION
It is recommended to check periodically the
relief valve.
Proper operation can be tested by letting gas in at a
pressure higher than the valve setting, the valve should
release gas.
Once the check is completed, and the valve is reset for
normal operation, make sure valve seal is in proper working
order.
MAINTENANCE
!
WARNING
All maintenance procedures must be carried
out only by qualied personnel.
If necessary, contact our technical support
representatives or our authorized dealers.
V Series Relief valve and its pressure accessories are
subject to normal wear and must be inspected periodically
and replaced as necessary.
The frequency of inspection/checks and replacement
depends upon the severity of service conditions and upon
applicable National or Industry codes, standards and
regulations/recommendations.
In accordance with applicable National or Industry codes,
standards and regulations/recommendations, all hazards
covered by specic tests after nal assembling before
applying the CE marking, shall be covered also after every
subsequent reassembly at installation site, in order to ensure
that the equipment will be safe throughout its intended life.
Before proceeding with any maintenance work, shutoff the
gas upstream and downstream from the valve, also ensure
that there is no gas under pressure inside the body by
loosening the upstream and downstream connections.
V/50 Series
(See Figure 7)
a. Remove the cap (key 1), the adjusting nut (key 4) and the
spring (key 5).
b. Remove the screws (key 10), the cover (key 6).
Only for V/52 version remove the reduction ring (key 22).
c. Remove the diaphragm assembly and check proper
operation of the diaphragm (key 9), the pad (key 14) and
the pad retainer (key 20). Replace any worn part.
d. Remove the seat (key 15) using the appropriate wrench.
Remove the O-ring (key 16) and replace it if necessary.
e. Re-assemble in reverse order, be very careful in
positioning the diaphragm and in tightening the screws
(key 10). Uneven tightening can cause seal and valve
malfunctioning.
V/60 Series
(See Figure 8)
a. Remove the cap (key 1), the adjusting nut (key 20) and
the spring (key 3).
b. Remove the screws (key 10), the cover (key 19).
Only for V/62 version remove the reduction ring (key 22).
c. Remove the diaphragm assembly and check proper
operation of the diaphragm (key 9), the pad unit (key 11)
and the pad retainer (key 14). Replace any worn part.
d. Remove the seat (key 12) using the appropriate wrench.
Remove the O-ring (key 13) and replace it if necessary.
e. Re-assemble in reverse order, be very careful in
positioning the diaphragm and in tightening the screws
(key 10). Uneven tightening can cause seal and valve
malfunctioning.

V Series
7
Type V/20-2
(See Figure 9)
a. Unscrew the outlet connection (key 9).
b. Unscrew the adjusting nut (key 2), remove the spring
(key 8) and the pad unit (key 4-5-6-7).
c. Disassemble the pad unit parts and replace the pad
(key 6).
d. Check the seat on the valve body.
e. Re-assemble in reverse order.
SPARE PARTS
Spare parts storage shall be done by proper procedures
according to national standard/rules to avoid over aging or
any damage.
TROUBLESHOOTING
Table 3. General Troubleshooting for V Series Relief Valves
SYMPTOMS CAUSE ACTIONS
The valve does not open
Lack of incoming gas Check the station feeding
Valve diaphragm is broken
(V/50 and V/60 Series only) To be replaced
Valve setting is higher than required Check valve setting
Pad is stuck to seat Perform complete valve maintenance
The valve is not sealed properly
Tight shutoff gaskets are worn To be replaced
Deposit of grime on the valve seat.
It can prevent proper closing Perform complete valve maintenance
Valve setting is lower than required Check valve setting

V Series
8
PARTS LISTS
V/50 Series Relief Valve
(See Figure 7)
Key Description
1 Cap
2 Nut
3 Threaded stem
4 Adjusting nut
5 Spring
6 Cover
7 Washer
8 Plate
9* Diaphragm
10 Screw
11 Washer
12 Nut
13 Body
14* Pad
15 Seat
16* O-ring
17* Gasket
18 Plate
19 Dado
20 Pad retainer
21 Label
22 Reduction ring
V/60 Series Relief Valve
(See Figure 8)
Key Description
1 Cap
2 Nut
3 Spring
4 Nut
5 Nut
6 Washer
7 Disk
8 Plate
9* Diaphragm
10 Screw
11* Pad unit
12 Seat
13* O-ring
14 Pad retainer
15 Body
16 Seeger
17 Net
18 Label
19 Cover
20 Adjusting nut
21 Threaded stem
22 Reduction ring
Type V/20-2 Relief Valve
(See Figure 9)
Key Description
1 Body
2 Adjusting nut
4 Pad holder
5 Nut
6* Pad
7 Pad retainer
8 Spring
9 Outlet connection
Rubber parts marked with (*) are supplied in the “spare parts
kit”, recommended as stock.
To order the kit it is necessary to communicate to us the type
of the relief and its serial number.

V Series
9
1
2
4
21
3
5
6
18
19
20 7
8 9 10
1112131415
16
17
TYPE V/50
TYPE V/51 DETAIL
8 9
TYPE V/52 DETAIL
8 9 22 10
15
Figure 7. V/50 Series Relief Valve
LM/518/1
SCHEMATIC ASSEMBLIES

V Series
10
LM/1160
Figure 8. V/60 Series Relief Valve
7 8 9 10 22
TYPE V/62 DETAIL
9
TYPE V/61 DETAIL
1
2
3
4
5
6 7
9 10
111213
14 15
16
17
8
18
19
20
21
TYPE V/60