
A/100 Safe Use Guide
SG0095GB Rev.06 
Year of Manufacture 2008
 
 
 
2 
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 pressure containing 
parts by shocks or anomalous stresses. 
Built-up sensing lines and pressure accessories shall to 
be protected by shocks or anomalous stresses. 
Installation 
! WARNING ! 
Installation shall be in accordance with national 
standard for material use limitations in gas 
pressure reducing stations. 
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. 
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 
pressure-relieving 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 non-
seismic 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. 
Apply pipe compound to the male pipe threads. 
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.