For Nonstop Operation of High-Cycle Applications Use Fisher Control Valve Assemblies ®
| Nonstop High-Cycle Applications
Nonstop High-Cycle Applications | 3 For Nonstop Operation of High-Cycle Operations, Use Fisher Control Valve Assemblies H igh-cycle applications such as pressure swing adsorption and molecular sieve adsorption are very abusive on control valve assemblies. Stroking frequency exceeds 60,000 cycles per year and tight shutoff to Class V or Class VI is required to maintain industrial gas purity and efficiency. Proper selection of control valve assemblies is imperative.
| Nonstop High-Cycle Applications Applications Discussion Pressure Swing Adsorption (PSA) PSA is a process that involves separating impurities from a feedgas mixture to produce a single product gas such as hydrogen, oxygen, or nitrogen. Feedgas cycles through fixed-bed adsorbers, which are surrounded by control valves that use forward and reverse flow to rapidly switch gases between parallel vessels.
Nonstop High-Cycle Applications | 5 Molecular Sieve Adsorption With the competitive environment in the ethanol industry constantly increasing, now is the time to focus on improving overall plant efficiency and reliability. Regardless of plant scale, the molecular sieve adsorption application presents a significant opportunity for such improvements. Continued enhancement of this essential component of the ethanol process is critical to achieving plant output and revenue targets.
| Nonstop High-Cycle Applications Improve Reliability Licensor Accepted Emerson offers a breadth of tested and proven-reliable Fisher control valve assemblies to help extend the lifecycle of high-cycle applications and maintain purity. Fisher control valve assemblies are accepted by several of the world’s leading licensors for use in their high-cycle applications because they were validated through lab testing and field trials.
Nonstop High-Cycle Applications | 7 Validated Through Testing The Emerson PSA testing facility was designed to represent the PSA process as accurately as possible. A large volume tank (see ) provides process pressure in high capacity to all of the control valve assemblies currently being tested. Instrument air is filtered and dried using desiccant, and is then regulated to the appropriate pressure for each control valve assembly.
| Nonstop High-Cycle Applications Improve Purity Engineered for Tight Shutoff Control valve shutoff is a major concern because it affects purity. If control valve leakage causes contamination from one PSA bed to another, industrial gas purity can be compromised. Fisher sliding-stem and rotary control valves are premier performers in achieving tight shutoff in highcycle applications.
Nonstop High-Cycle Applications | 9 Seal Assembly Excellent Shutoff with Rotary Control Valves Spring-Loaded Shaft Fisher A81 and 8580 control valves meet critical shutoff requirements with the use of unique seal rings with pressure-assisted sealing action and spring-loaded shafts that center the disk in the seal. Low friction PTFE-lined PEEK bearings maximize control valve performance.
| Nonstop High-Cycle Applications Improve Uptime with Sliding-Stem Control Valve Assemblies Reliable Actuator Performance - Special GX actuator diaphragm material helps reduce common problems such as air oxidation, thermal aging, low temperature embrittlement, and loss of retention. Unlike a piston actuator, the GX spring-and-diaphragm actuator does not have a large diameter sliding seal that is subject to wear.
Nonstop High-Cycle Applications | 11 Low Emission (Low-E) Packing Meets Environmental Requirements ™ Certified Fisher ENVIRO-SEAL packing system controls emissions, ensuring environmental compliance and excellent sealing over the extended service life of the control valve.
| Nonstop High-Cycle Applications Improve Uptime with Rotary Control Valve Assemblies Reliable Actuator Performance - The 2052 spring-and-diaphragm actuator was designed for long service life under load conditions. It has no O-rings to wear, an inherent position on air failure, low actuator pressures for operation, and double-sided diaphragms. Designed for 1,000,000 cycles under load conditions, you can forget about leakage, failure, and poor control.
Nonstop High-Cycle Applications | 13 Fisher 8580 control valve, 2052 actuator, and DVC6200 instrument n Licensor Approved nV alidated Through Testing to 1,000,000 Cycles nC omplete, Integrated Solution From One Supplier On-Line, In-Service Diagnostics When coupled with ValveLink software, FIELDVUE digital valve controllers give advanced notice of performance issues and provide recommended actions.
| Nonstop High-Cycle Applications Fisher Control Valve Lifecycle Services The way you manage key production assets like control valves directly affects your plant’s efficiency, reliability, and profitability. Emerson’s Fisher Services provides trusted expertise for reliability-centered control valve maintenance and repair.
Nonstop High-Cycle Applications | 15 You’re Never Alone Our extensive network of Service Center locations spans every continent. We’re there for you day or night, when and where you need us, 24/7/365. To learn more, scan the QR code or visit www.Fisher.com/LifecycleServices.
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