The Dos and Don’ts of Isolating Pressure Relief Valves
Typically, isolation valves are used to block off a pressure safety valve (PSV) from system pressure, so that maintenance on the valve or related equipment can be conducted without a shut down.
#pressure-relief #maintenance-repair #automation
New Test Stamp and More Updates on Pressure Vessel Codes
A new test organization program and stamp has been authorized by the National Board of Boiler and Pressure Vessel Inspectors (NBBI), effective February 2016.
#pressure-relief #standards
Intermediate Class Valves, the Forgotten Classification
These days, piping designers use automated systems that default to standard classifications such as pressure classes of 150 to 2500 for valves and associated equipment.
#automation #pressure-relief #standards
Valve Positioners Offer Improved Control Valve Performance
By closely controlling the pressure and temperature of both heating and cooling mediums within heat exchange systems, the use of an automated control valve can help assure the efficient transfer of heat.
#pressure-relief
Introduction to Pressure Relief Devices - Part 1
When the pressure inside equipment such as boilers or pressure vessels increases beyond a specified value, the excess pressure may result in a catastrophic failure.
#pressure-relief #basics #automation
Back to Basics: Pressure Relief Devices, Part 2
In Part 1 of Pressure Relief Devices, which appears in VALVE Magazine’s Winter 2016 issue, the author stresses the vital role pressure relief devices play in keeping end-user industries that deal with pressurized equipment safe.
#basics #pressure-relief #automation
NAM Monday Economic Report - September 21, 2015
In deciding not to start raising short-term interest rates, the Federal Open Market Committee (FOMC) said, “Recent global economic and financial developments may restrain economic activity somewhat and are likely to put further downward pressure on inflation in the near term.” As such, the Federal Reserve has chosen to see how the next few months transpire before opting to begin the process of normalizing rates, likely at the December 15–16 meeting, depending on the strength of incoming data between now and then.
#pressure-relief
From Cannon Balls to Pressure Seals: Graphite for Sealing
Graphite has qualities that make it a great choice for certain applications in the manufacturing world.
#pressure-relief
Advanced Computational Fluid Dynamics Analysis in Control Valves
CFD is used in early field issue resolution where a small section of geometry is modeled in order to test a hypothesis such as low-pressure zones around corners, minimum temperatures, impingement angles for wear studies, etc.
#pressure-relief
Inexpensive Safe Water Tapped by Correcting Control Valve Output
The error output from a control valve can come from a variety of sources: uncontrolled input pressure, uncontrolled input flow rate, inaccurate orifice size or turbulent flow through the system which causes irregularity of flow rates through the system.
#water-wastewater #pressure-relief #controls
The Rationale Behind Valve Characteristics
Back in the “early days,” we were taught that, to properly control flow, we should select a linear valve characteristic when the valve controls more than 25% of the piping system pressure drop at full flow.
#pressure-relief #controls #automation
Pressure Seal Standards Update
The EPA has been reducing the allowable fugitive emissions on valves in the last few years.
#standards #pressure-relief
Improve Ethylene Conversion: Critical Control Valves for Cracked Gas Processing
Maximum ethylene production requires several conditions: a highly saturated feedstock, high coil outlet temperature, low hydrocarbon partial pressure, short residence time in the radiant coil, and rapid quenching of the cracked gases.
#pressure-relief
Using Advanced Sealing Technologies to Prevent Fugitive Emissions
With valves accounting for 60 percent of all non-compliance, conventional valve packing will not be an acceptable emissions solution by itself moving forward.
#pressure-relief
The Intriguing Story of the Pressure Seal Valve
In a quest for more efficient power generation, power plants in the 1930s pushed the pressure-temperature envelope.
#valvehistory #pressure-relief
Trends in Independent Valve Pressure Testing
Before the industry slowdown of 2008, end users performed third-party pressure testing of valves for use in critical service according to the acceptance criteria of ASME B16.34, API-598, API-6D, etc.
#pressure-relief #maintenance-repair #standards
Offshore High Pressure Relief Valve
Oil wells drilled in deep waters typically face many difficulties with pressure, especially as the wells are placed on the bottom of the ocean floor.
#pressure-relief
Kingston Valves Announces New Safety Relief Valve
Storm Manufacturing Group, maker of Kingston Valves, announces the release of their new safety valve series: the Kingston Model 710.
#pressure-relief
Clean Service Relief Valves from Rupture Pin Technology
The clean service pressure relief valve from Rupture Pin Technology (RPT) uses a precise pin as the sensor and actuator.
#pressure-relief #actuators #automation
Best Practices in Pressure-Relief Valve Maintenance and Repair
In their presentation at the Valve Repair Council Repair Meeting & Exhibition, Nov. 1 and 2, 2012, in Houston, Bob Donalson and Kevin Simmons of Pentair Valves & Controls shared valuable information about maintenance and repair programs for pressure-relief valves.
#pressure-relief #maintenance-repair #controls