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Valve Web

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ICEweb has great pages on the following Valve subjects.

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. Thanks to our sponsors tyco flow control pacific.

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

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)

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.
9.09 Gas to flare system ESV & ESD valves - This application note describes the requirements.