Valve Technical Information Portal
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Valve Technical Information Portal |
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ICEweb has great pages on the following Valve subjects.
Control Valves - Heaps of Technical Information here covering a vast array of Control Valve subjects! - Control Valve Sizing, Calculations, Control Valve Positioners, Actuators, Ancillaries, Diagnostic Tools, Noise Calculation and Prediction, Selection, Application and lots more.
Choke Valves - Technical Information - Selection, Application, Design, Actuators.
Composite Valves - Plastics provide great alternatives, see the technical papers here for more info.
Firesafe Actuators - A useful Accessory for ESD/SDV/BDV Valves.
High Integrity Pipeline Protection Systems (HIPPS) - These systems have been utilised in Germany for over 20 years and are proven to be extremely reliable in very rapid isolation of pipelines - Technical Papers Articles and Applications.
Power Plant Valves - Details on the design and manufacture of severe service valves in power plants, e.g turbine bypass stations, desuperheaters, pump protection valves and feedwater control valves.
Pressure Relief Valves- Just about Everything that you could wish to know! - Pressure Relief Valve Sizing, Specification and Selection , Design, Applications, Technical Papers, Technical Manuals, Engineering Handbooks, Calculations, Relief design, Bursting/Rupture Discs, Buckling Pin Technology, Vent Sizing, Useful Forums and More.
Self Regulating Valves - Self Regulating Valves integrate the measuring sensor, controller as well as control element in a simple pressure control loop - General Theory, Technical Papers, Maintenance and Applications.
Severe Service Valves - Sometimes a standard control valve is not suitable for severe service applications. These valves are specifically designed to operate in very arduous conditions - Specification and Selection , Design, Applications, Technical Papers, Technical Manuals etc.
Shutdown and Blowdown ESD Valves - Comprehensive information on these important valves which are used for Safety Instrumented System applications - Selection Guides, Sizing, Standards, Applications, Design, Specification, Diagnostics, Smart Positioners in SIS applications, Actuators and Accessories.
Material Selection - ICEweb's Corrosion pages have links to a vast array of Material Section Information.
Morin Actuators - Basic information
The Following links are compliments of our valued sponsor Metso Automation)
A
Sound Solution Acoustic Leak Detection for Neles ValvGuard System Reduces
Hazards and Production Loss - Reijo Karjalainen - A
highly reliable and accurate online acoustic leak detection system is now
available for Metso Automation’s Neles ValvGuard™ testing and monitoring
system for emergency venting (ESV) valves. This system, which automatically
monitors normally closed venting valves, is capable of detecting internal
leakage as low as a few bubbles. The leak test can also be part of the complete
test stroke of normally open ESD valves.
Neles have a comprehensive range of Useful
Application Reports covering valve applications in the Pulp
, Paper,
Chemical, and
Refinery
Industries.
Partial
Closing with Neles Valveguard - Safety
engineers throughout the world are struggling with the problem of how to best
comply with new and more stringent safety requirements. New IEC requirements
state that manufacturers must determine and document precise levels of safety
and furnish quantifiable proof of compliance. In light of these requirements, BP
feels it is necessary to reassess its traditional safety loop testing
procedures. In particular, BP feels it is important to improve its safety valve
testing procedures in order to drive costs down and improve plant safety.
Neles ValvGuard
"exercises"
to keep fit -
This article describes automatically “exercising” the valve through a
partial stroke at pre-programmed intervals.
Ensuring
that your ESD Valves Work when needed - Emergency
Shut-Down valves (ESD) are critical in protection of plant and personnel. These
must operate in the event of plant malfunction or fire. The most important
requirement for an ESD-valve is it’s reliability of operation (open or close)
in an emergency. By it’s very nature, it is difficult to test that an ESD-valve
is "available" without causing a plant upset. The plant is at risk
however unless it can be shown that the valve is functioning properly. How can
this be done ? Neles Controls has developed a unique system for testing on-line
ESD-valves which uses a Jammer device. This can be offered for local manual use
or automatic operation from a control room.
Need
a Cryogenic Valve Testing Facility? - The
cryogenic valve test centre at Metso Helsinki factory is one of the largest and
most advanced dedicated valve test facilities in Europe. It offers customer
inspectors the possibility of witnessing potentially hazardous testing
operations through shockproof windows in the comfort of a protected, air
controlled control room built to the latest safety standards, using a fully
computer controlled and logged testing system.
ESD
Valve Selection Guide - General ESD Valve Definition -
This
14 page document is an excellent Reference - ESD/ESV valves are the
final defence against process upsets. These valves have a function which
requires much more reliable performance than standard remotely operated on-off
valves. Still today ESD valves are ranked often as ordinary shut-off valves in
specifications. Valves as such may still remain the same but being a part of
Safety Instrumented Function (SIF) the performance expectations are much higher.
There must be a prove for a reliable long term performance. MTBF (Mean Time
Between Failure) number needs to be given to Safety calculations (SIL).
Reducing
Operating Costs on ESD valves - As safety standards
become more stringent, online testing will become part of everyday life for
process plants that want to increase time between shutdowns. However, with
frequent manual online testing comes high operational cost.Neles ValvGuard™ is
uniquely designed to lower operating costs and deliver fast payback. When
purchases are made quite often only the initial capital outlay is considered.
Whilst the price of Neles ValvGuard compares favourably with other types of
partial stroke testing device, the savings that are made during the operational
life of the valve go far beyond the initial expenditure. Savings can be expected
in several important areas.
Comparison
Between Testing Methodologies to achieve the required SIL level. The
IEC 61508/61511 (Equiv. ISA - S.91 (TR.84)) safety standards are creating more
stringent testing requirements for safety equipment.
Acoustic
Leak Detection - Acoustic techniques are being
employed to detect leakage. It is known that leakage is usually accompanied by
acoustic emission. An acoustic emission is a sound wave, or more properly, a
stress wave that travels through a material as the result of some sudden release
of strain energy. The acoustic energy travels in for of ultrasonic waves through
the material of the structure. Thus it may be detected by a remote sensor
situated either on the containing structure or in the fluid itself.
Diagnostic
coverage Reports for ESD valves - Metso Automation
has developed Neles ValvGuard™ a partial stroke testing system for emergency
shutdown valves and emergency vent valves. In addition to providing the normal
safety shutdown function, the system performs automated diagnostic partial
stroke tests, which can be programmed by a configuration software (FieldCare)
installed on a PC. Various test parameters are measured and recorded during
these diagnostic tests. If test parameter limits are exceeded, the valve will
alert the operators so that investigative action can be taken. In addition,
these test parameters can be trended to create a history of the valve
performance and deterioration of valve performance can be detected and
evaluated.
Gas
to flare system ESV & ESD valves - This
application note describes the requirements.
10.11Taking
Safety Valve Testing to the Next Level - Juha Kivelä - Today’s safety
engineers face increasing challenges every day. Safety requirements are becoming
more and more demanding, while the global market situation is simultaneously
creating constant pressure to reduce costs. The IEC61511 safety standard
requirements state that industrial processing plants must determine the Safety
Integrity Level (SIL) for all the different areas of the plant. Based on the
area SIL classifications, the plants must then be able to dispatch quantifiable
proof of compliance with the requirements.
10.11
Bringing
Intelligence to On-Off valves and Simplifying On-Off Valve Instrumentation
- Juha Kivelä - Traditionally, on-off valves have been instrumented by at least
a separate solenoid valve and limit switches. Quite often the desired
functionality cannot be achieved by using only a solenoid valve and limit
switches, which means that additional pneumatic accessories are needed. For
example, if the process requires precise valve opening or closing stroke times,
these cannot be guaranteed by using only a solenoid valve; but there is also a
need for some extra accessories such as throttle valves.
10.11Onshore
Condition Monitoring of Offshore Valve Assemblies - Niklas Lindfors and
Jarkko Räty - Especially
in the offshore sector, there is strong emphasis on minimizing the number of
staff working in hazardous offshore environments, without impacting on
reliability. At the same time, it is expected that the availability of
production and the life cycle costs of process equipment should be optimised.
These requirements create the need to improve the capability to analyse
control-valve data from offshore applications - to focus and plan service
actions well in advance. In other words, to enhance the utilization of existing
technologies and increase the use of specialist know-how in order to enable
offshore personnel to carry out the required tasks effectively, safely and with
minimal labour and disturbance to the process itself. (Go to page 4 to access
this information)