73 / 76
July
2020
HYDROCARBON
ENGINEERING
71
Rotork
Rotork is a leading global provider of mission-critical
flow control and instrumentation solutions for oil and
gas downstream applications. Its products are in all
downstream applications, from refining and processing,
to the final distribution of products to the end user and
consumer.
The company’s new digital smart positioner is
suitable for both control and on/off valve applications
where enhanced diagnostics are required. It is ideal for
highly critical applications in chemical/petrochemical
processes.
The YT-3700 and YT-3750 pneumatic smart
positioners employ continuous monitoring and graphic
display of valve position, set point target over time and
internal circuit board temperature over time.
With single and double-acting configurations
available, they provide reliable control of pneumatic
valve systems for linear and rotary applications.
Valve diagnostic information to NE107 standard is
provided, with Hart® 7 communication protocol included
as standard and a display for all settings and local device
interaction. Commissioning can be handled locally
without the need of an additional device. All indications
are clear and simple to follow thanks to the clear visual
identification on the local display and the four push
buttons.
The enhanced diagnostic package offers position
over time continuous monitoring, and graphical
visualisation through Device Description (DD) and
Device Type Manager (DTM) files. Additionally, valve
signature, advanced step tests and partial stroke testing
(PST) can be operated from local or remote positions.
Auto-tuning functionality and a non-contact sensor are
included for high frequency operating valves and an
enhanced lifetime.
The steady state deviation analysis that they provide
can detect friction in the valve or actuator, leakage in
pneumatics and instances where there is insufficient
supply pressure. A deviation time-out alarm occurs when
the difference between the target position and the
actual position exceeds the pre-set deviation alarm
point (for more than the pre-set deviation time).
To match emergency shutdown (ESD) systems for
on-off applications, the YT-3700 range offers a full
package of offline diagnostic tests including both valve
signature and PST. All information can be stored on the
device or downloaded for customer records.
The YT-3700 and YT-3750 are certified to
ATEX/LEXIEX standards and can operate in temperatures
as low as -55°C.
Union Tech
Union Tech is a leading manufacturer of severe-service
metal-seated ball valves (MSBV) and rising-stem ball
valves (RSBV). The company’s valves are installed
worldwide in critical applications across the entire
petroleum supply chain.
Union Tech’s methodologies and capabilities enable
the rapid development of bespoke sealing and isolation
solutions that are fit for purpose. Examples of the
company’s customised solutions include the following:
For a biofuels plant that converts non-food
biomass feedstocks (e.g. wood, agricultural
residues, algae, aquatic plants, and municipal
wastes) directly into gasoline, jet, and diesel
drop-in transportation fuels, Union Tech developed
and built Z2 metal-seated ball valves specifically
for this proprietary renewable energy technology.
For a solar steam plant that delivers steam to an
enhanced oil recovery (EOR) field, Union Tech
designed and manufactured Z2 metal-seated ball
valves for an emergency shutdown isolation
application capable of severe thermal cycling under
extreme pressures.
For a methanol-to-olefins (MTO) project,
Union Tech engineered and manufactured a
package of Z4 rising-stem ball valves and pneumatic
actuators from 1.5 in. up to 10 in. for the molecular
sieve application.
A bespoke Union Tech 3x3-600# Z2 valve for a biofuels
plant.