Emerson Tartarini V Series User manual

V Series

Instruction Manual

D103666X012

January 2015 - Rev. 00

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

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

SERIALNr.

°C

FLUIDO GRUPPO

FLUIDGROUP

ANNO

YEAR

HARMONIZEDSTD.

bar

NORMEARMONIZ.

LEAKAGECLASS

CLASSEDI PERDITA

FUNCTIONALCLASS

CLASSEFUNZIONALE bar

Wao

bar

pao

body bar PT

PS bar

covers

bar

pmax

xxxx

body

Notified

BOLOGNAITALY

O.M.T.

1.5Note 4Note 3

Note2

Note 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

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

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

Type V/20-2

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

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

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

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

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

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

20 7

8 9 10

1112131415

TYPE V/50

TYPE V/51 DETAIL

8 9

TYPE V/52 DETAIL

8 9 22 10

Figure 7. V/50 Series Relief Valve

LM/518/1

SCHEMATIC ASSEMBLIES

V Series

LM/1160

Figure 8. V/60 Series Relief Valve

7 8 9 10 22

TYPE V/62 DETAIL

TYPE V/61 DETAIL

6 7

9 10

111213

14 15

TYPE V/60

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