Valves for urea and ammonia NOx control
The market for valves for use in NOx control is expanding at a rapid rate. The reagents used to reduce NOx are urea, ammonia, or hydrogen peroxide. Some new technologies being discussed in McIlvaine webinars include a combination of technologies.
Emission standards for valve packings
The petroleum and chemical industries have been looking for meaningful standards that will enable the qualification of valves and packings that meet the increasingly stringent fugitive emission regulations, which have increased since the 1990s. The focus has been on the main source of the emissions—valve stem packing...
On the design of a novel single piston effect seal for cryogenic valves
Current SPE and DPE designs as used in the past and in today’s cryogenic trunnion ball valves are challenged to an almost impossible task. And with LNG becoming more and more popular as a clean fuel it makes sense to eliminate as far as possible the leakage of methane. In addition to protecting the environment, a leak free valve is also a serious safety feature when operating highly flammable gas like LNG..
The perils and pitfalls of PST devices
In the February 2016 issue of Valve World we ran an interview with Mr. Henk Hinssen, Mr. Hinssen indicated he had uncovered serious shortcomings in many emergency shutdown valves (ESDV) used to enhance safety in upstream plants. Looking for more expert views on this topic, Valve World spoke to Ed Holtgraver, one of the founders of QTRCO, about his concerns with Partial Stroke Test
Defining severe service valves
No clear or universal industry definition or mechanism exists to describe and accurately define severe service valves (SSVs) from general purpose valves, yet such a definition would allow clients to benefit from improved process performance, increased profitability, safety and environmental protection. This high level paper looks to offer an objective definition for better communication between users, specifiers and suppliers.
The promising future of plastic valves
Valves don’t necessarily need to be made from, for example, stainless steel, or grey cast iron. Plastic valves are used in numerous areas to convey fluids through pipes, and they need not shy away from uncomfortable environments.
What road ahead for valves?
The sharp decline in crude prices and the subsequent volatility has meant that it’s been an onerous two years for oil producers, a period marked with budget cuts. The situation for the offshore side of the business has been far more severe. Once hailed as the bulwark from peak oil, the massive costs associated with its development in the face of low margins have made it increasingly difficult for companies to commit investments in recent times. Anurag Agrawal reports.
Turkmenistan builds its largest ammonia and urea plant
Turkmenistan has undergone steady economic growth in recent years, sustained by its abundant reserves of natural gas which rank the country as fourth largest by production volume worldwide. President Berdimuhamedov seems set to continue the policy of developing high-value-added natural gas products as well as diversification of their gas exports. One example is the current construction of a new fertilizer plant in Garabogaz, due for completion in July 2018.
The importance of stem seal configuration in ISO 15848-1 certified valves
There are a number of standards to which process valves can be tested and certified in order to guarantee their emission tightness. The ISO 15848-1 testing protocol is making headway to be the accepted standard in the European region while the API 624 standard seems to be the predominant standard in the United States. In Germany all the valves that shall be used in the chemical and petrochemical industry shall have the VDI 2440 certification done.
Reflections on MOV testing
Stan Hale has worked a long time in the motor-operated valve testing within the nuclear power industry. Here he reflects on how far the industry has come.
