Specification :

Pipelines, Upgrading Facilities and Refineries
This versatile, compact and robust X-Ray Transmission ( XRT) process gauge was specifically optimized for the total sulfur analysis needs of refineries, pipelines, blending operations, heavy oil upgrading, bunkering terminals and other storage facilities.

Applications include bunker fuel blending to meet MARPOL Annex VI sulfur restrictions, interface detection of different grade fuels delivered via pipelines, refinery feedstock blending and monitoring, and the quality monitoring of crude at remote collection and storage facilities.

MARPOL Regulations
IMO ship pollution rules are contained in the " International Convention on the Prevention of Pollution from Ships" , known as MARPOL 73/ 78. On 27 September 1997, the MARPOL Convention was amended by the " 1997 Protocol, " which includes Annex VI titled " Regulations for the Prevention of Air Pollution from Ships" . MARPOL Annex VI sets limits on NOx and SOx emissions from ship exhausts and prohibits deliberate emissions of ozone depleting substances. The Rigaku NEX XT is the perfect tool to assay marine bunker fuels for blending to meet emissions regulation compliance.

3rd Generation Technology
The new Rigaku NEX XT system is faster, more sensitive and far more compact than competitive systems and provides continuous, reliable detection of sulfur at pressures up to 1480 psig and 200º C. Rigaku NEX XT can operate as a stand-alone analyzer or provide real time closed loop control when tied into a blending or plant wide automation system.

Among its other key features are a simplified user interface, reduced standards requirement, automatic density compensation, automatic water compensation, password protection, and standard platform for communicating sulfur, density, and water content to a plant-wide DCS. Due to its unique design and robust construction, sample conditioning and recovery systems are typically not required.

NEX XT Specifications

Sulfur Analysis Range
0.02 - 6%
Process Conditions
Stream pressures to 100 bar ( 1480 psig)
Stream temperatures to 200º C ( 392º F)
Flow rates up to 200 l/ m ( 53 gal/ m)
Ambient Conditions
0 - 43º C ( 32 - 110º F)
Communications
Sulfur results: 4 - 20 mA output
Density results: 4 - 20 mA output
General warning: dry contact
General alarm: dry contact
PROFINET or MODBUS 485
Required Inputs
4 - 20 mA raw density
precision of ± 0.0001 or better
Optional Inputs
4 - 20 mA process temperature
for density corrected to 15º C / 59º F
4 - 20 mA water concentration
if water correction is desired
4 - 20 mA flow
for loss of flow warning
4 - 20 mA remote calibration selection
Process Connection
Two 1 inch 600 # ANSI flanges
Area Classifications
Class 1 Div 1
Class 1 Div 2
ATEX zone 1 ( pending)
ATEX zone 2
Air Supply
Purge
4.1 - 8.3 bar ( 60 - 120 psig) air pressure
115 - 225 l/ m ( 4 - 8 scfm) rapid exchange
Leakage compensation ( application specific)
710 - 990 l/ m ( 25 - 35 scfm) dry oil free air
6.9 - 8.3 bar ( 100 - 120 psig) air pressure
Power Requirements
115/ 230 Volts 2.8/ 1.4 Amps 47 - 63 Hz
Dedicated supply