Emerson Tarantini MN, Tarantini MF, Tarantini MBF, Tarantini MBN-M, Tarantini MBN Safe Use Manual

Safe Use Guide

SG0125GB Rev.07
Year of Manufacture 2008

MN y MBN y MBN-M y MF y MBF y MBF-M

Self-operated regulator

Introduction

This Installation Guide provides instructions and safety
information on pressure equipment so as to avoid any
foreseeable risk during the use.

For further information refer to Types MN Instruction
Manual, n° 0125 and Bulletin, n° 0120.

To receive a copy of the Bulletin, contact your local O.M.T.
Tartarini Sales Office or O.M.T Tartarini Sales
Representative.

General Remark

The standard gas pressure devices (regulators and safety
shut-off devices) are those used in the assemblies dealt
with into EN 12186 and EN 12279 and their use has to be
under the provisions into ENs 12186 & 12279.

Fail-to-open stand-alone regulators cannot be used as a
safety accessory according PED 97/23/EC to protect
downstream pressure equipment.

In the pressure regulators (with or without built-in safety
shut-off devices) manufactured by OMT Tartarini shall be
used additionary pressure accessories (e.g. pilots or
filters) manufactured and labeled by OMT Tartarini.

OMT Tartarini will be not responsible for any possible
inefficiency due to installation of not own production
additionary pressure accessories (e.g. pilots or filters).

When pressure containing parts of possible built-in safety
shut-off device (SSD) valve and pilot have different
maximum allowable pressures, the SSD is differential
strength type.

P.E.D. Categories and Fluid Group

According to EN 14382, only in integral strength type and
Class A configuration (when both over and under pressure
protections are set up), the possible built-in safety shut-off
device can be classified like a safety accessory according
to PED.

The minimum PS between SSD valve and pilot shall be
the PS of the safety accessory to comply the provisions of
EN 14382 about integral strength type.

Downstream equipments, protected by possible built-in
safety shut-off device (in its Class A and integral strength
configuration) of this product, shall have technical features
such as to be category per table below according Directive
97/23/EC “PED”.

Product Size Category Fluid Group

DN 25 SEP

From DN 40 to 50 I

From DN 65 to 100 II

All size for regulators with

built-in SSD

Possible built-in pressure accessories (e.g. pilots OS66/)
conform to Pressure Equipment Directive (PED) 97/23/EC

IV

1

Article 3 section 3 and were designed and manufactured
in accordance with sound engineering practice (SEP).

Per Article 3 section 3, these “SEP” products must not
bear the CE marking.

Specifications

Body Sizes and End Connection Styles

MN • MBN • MBN-M
DN 25x50-40x80-50x100-65x100-80x150-100x200
ANSI Class 150 flanged (PN 16 on request)

MF • MBF • MBF-M
DN 25-40-50-80-100
ANSI Class 150 flanged (PN 16 on request)

! WARNING !

Maximum Operating Inlet Pressure (1)

MN • MBN • MBN-M DN 25-40-50: 10 bar **
MN • MBN • MBN-M DN 65-80-100: 5 bar **
MF • MBF • MBF-M DN 25-40-50: 10 bar **
MF • MBF • MBF-M DN 80-100: 5 bar **

MN-AP • MBN-AP • MBN-M-AP: 19.6 bar *
MF-AP • MBF-AP • MBF-M-AP: 19.6 bar *

MN-APA • MBN-APA • MBN-M-APA: 19.6 bar *
MF-APA • MBF-APA • MBF-M-APA: 19.6 bar *

* at average ambient temperature
** -PST is version available on request to allow a

Maximum Operating Inlet Pressure =19.6 bar at average
ambient temperature

Operating Outlet Set Pressure Ranges

MN • MF: 10 ÷ 500 mbar *
MN-AP • MF-AP: 0.5 ÷ 1 bar
MN-APA • MF-APA: 1 ÷ 3 bar

* For DN 80 and 100 the Operating Outlet Set Pressure
Range is allowable with M…-BP version.

Minimum/Maximum Allowable Temperature (TS) (1)

See nameplate
(1) : The pressure/temperature limits in this Safe Use

Guide and any applicable standard or code limitation
should not be exceeded.

http://www.tartarini.it

Safe Use Guide

MN y MBN y MBN-M y MF y MBF y MBF-M

Year of Manufacture 2008

SG0125GB Rev.07

Marking

Installation

! WARNING !

Only qualified personnel should install or service a
regulator.

Regulators should be installed, operated, and
maintained in accordance with international and
applicable codes and regulations, and O.M.T. Tartarini
instructions.

If the regulator vents fluid or a leak develops in the
system, it indicates that service is required.

Note 1: See “Specifications” paragraph
Note 2: See page header
Note 3: Class 1: -10/+60 °C
Note 4: PN 16 PS = 16 bar

ANSI 150 PS = 19,3 bar
Note 5: 1,5 bar for M…N-BP/80-100
4 bar for all other models

Overpressure Protection

The recommended maximum allowable pressures are
stamped on the regulator nameplate.

If actual version hasn’t a built-in safety shut-off device,
some type of overpressure protection is needed if the
actual outlet pressure exceeds the actual maximum
operating outlet pressure rating.

Overpressure protection should also be provided if the
regulator inlet pressure is greater than the maximum
operating inlet pressure.

Downstream side pressure after possible built-in SSD’s
intervention shall stay within the actual maximum
operating set-up range to avoid anomalous back
pressures that can damage the SSD’s pilot.

Downstream overpressure protection shall be also
provided if the SSD outlet pressure can be greater than
the PS of the SSD pilot (differential strength type).

Regulator operation below the maximum pressure
limitations does not preclude the possibility of damage
from external sources or debris in the line.

The regulator 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 press ure containing
parts by shocks or anomalous stresses.

Ringbolts are designed just for handling of equipment
weight.

Built-up sensing lines and pressure accessories shall to
be protected by shocks or anomalous stresses.

Failure to take the regulator out of service
immediately may create a hazardous condition.

Personal injury, equipment damage, or leakage due to
escaping fluid or bursting of pressure-containing
parts may result if this regulator is over pressured or
is installed where service conditions could exceed the
limits given in the Specifications section, or where
conditions exceed any ratings of the adjacent piping
or piping connections.

To avoid such injury or damage, provide pressure­relieving or pressure-limiting devices (as required by
the appropriate code, regulation, or standard) to
prevent service conditions from exceeding limits.

Additionally, physical damage to the regulator could
result in personal injury and property damage due to
escaping fluid.

To avoid such injury and damage, install the regulator
in a safe location.

Before installation, check shall be done if service
conditions are consistent with use limitations and if
pilot set-up of possible built-in safety shut-off device
are in accordance with service conditions of protected
equipment.

All means for venting have to be provided in the
assemblies where the pressure equipment are
installed (ENs 12186 & 12279).

All means for draining have to be provided in the
equipment installed before regulators & shut-off
devices (ENs 12186 & 12279).

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
filters/separators/scrubbers to avoid any technical
& reasonable hazard of erosion or abrasion for
pressure containing parts.

Pressure equipment in subject shall be installed in no n­seismic area and hasn’t to undergo fire and thunderbolt
action.

Clean out all pipelines before installation of the regulator
and check to be sure the regulator has not been damaged
or has collected foreign material during shipping.

Use suitable line gaskets and approved piping and bolting
practices.

2

Safe Use Guide

SG0125GB Rev.07
Year of Manufacture 2008

MN y MBN y MBN-M y MF y MBF y MBF-M

Install the regulator in any position desired, unless
otherwise specified, but be sure flow through the body is
in the direction indicated by the arrow on the body.

Installation must be done avoiding anomalous stresses on
the body and using suitable joint means according
equipment dimensions and service conditions.

For a correct and safe use of the connections check also
Instruction Manual and Bulletin before installation.

User has to check and carry out any protection suitable for
assembly’s specific environment.

Note: It is important that the regulator be installed so
that the vent hole in the spring case is unobstructed at
all times.

For outdoor installations, the regulator should be
located away from vehicular traffic and positioned so
that water, ice, and other foreign materials cannot
enter the spring case through the vent.

Avoid placing the regulator beneath eaves or
downspouts, and be sure it is above the probable
snow level.

Start-up

The regulator and/or safety shut-off pilot 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 relief valves
properly adjusted, slowly open the upstream and
downstream line valves.

Adjustment

To change the outlet pressure turn the adjusting screw
clockwise to increase outlet pressure or counter clockwise
to decrease pressure.

Monitor the outlet pressure with a test gauge during the
adjustment.

external and internal tightness tests have to be done
according applicable codes.

Checks and Maintenance

Regulator 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.

Maintenance is possible by following proper procedures
detailed in the Instruction Manual.

In accordance with applicable National or Industry codes,
standards and regulations/recommendations, all hazards
covered by specific tests after final 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.

Commissioning / de-commissioning

See Instruction Manual for proper operations.
Safety requirements are according taking out of service

above information.

Spare parts

See Instruction Manual for spare parts tracing.
Spare parts storage shall be done by proper procedures

according also national standard/rules to avoid too much
aging or any damage.

Taking Out of Service (Shutdown)

! WARNING !

To avoid personal injury resulting from sudden
release of pressure, isolate the regulator 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,

Emerson Process Management
Regulator Division

O.M.T. Officina Meccanica Tartarini s.r.l.
Via P. Fabbri, 1
I - 40013 Castel Maggiore (Bologna) Italy
Tel. : +39 – 0514190611
Fax: +39 - 0514190715
E-mail: [e-mail]

www.tartarini.it

The contents of this publication are presented for informational purposes only, and while every effort has been made
to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the
products or services described herein or their use or applicability.
We reserve the right to modify or improve the designs or specifications of such products at any time without notice.