Regular maintenance ensures valves remain healthy. If your system is operating properly, you should physically inspect all valves at least every 12 weeks to check for tubing leaks and other abnormalities. Pressure gauges should be checked to ensure each valve is performing as designed. If you find something wrong, refer to the appropriate instruction manual, which may be available online.
Because valves are under pressure, care should be taken to bleed the pressure before a valve is taken apart. For example, in a 6-in. valve with 100 psi in the line, at least 2,800 pounds of force is trying to push off the valve cover.
Pilot System ShutOff Ball Valves
Exercise the main valve’s three pilotisolating valves, which are located in front of the strainer on the upstream side of the valve, on the bonnet over the top of the valve, and below the pressure-reducing pilot on the valve downstream. Turning the isolating ball valve a quarter turn to the closed position and returning it to the open position is sufficient. In the open position, the isolating valve’s handle lines up with its body.
Air in the Pilot System
Air, the pilot system’s primary enemy, causes false readings and poor valve operation. Bleed air from the valve bonnet. If the valve is equipped with a position indicator, a bleed cock will be located on top of the position indicator. Open the bleed cock slightly by turning the handle counterclockwise.
If the valve doesn’t have a position indicator, bleed air from the valve’s high point. If the water runs clear and no air bubbles are seen in the position indicator’s glass, close the bleed cock. If air is present, indicated by foamy white water, run the water until the air dissipates.
Strainers
Pilot systems rely on a supply of clean water, usually taken from the valve inlet. External or flush clean strainers can be installed. If an external strainer is installed, an occasional flush is a good idea. Cleaning the strainer screen for 3–5 seconds is usually sufficient. After you’ve gained some experience, you’ll know whether flushing should be conducted for a longer period.
Sector : Oil & GasCategory : Electric ActuatorsProducts : IQ - Standard, IQT - Part-Turn
Overview
Situated by the New Meuse River in Rotterdam, EuroLoop will be the world`s largest research and test site for the calibration, verification and type testing of industrial flow meters in the oil and gas industries and for the performance of industrial experiments involving process technologies and flow.The plant comprises two separate, industrial scale closed-loop test circuits - one for liquid meters and...
It’s no secret that a pump that runs at peak efficiency uses less fuel, experiences less downtime and costs less to operate. The time you spend maintaining your pump is actually an investment in its lifetime performance and value. In fact, there are many ways that a diligently maintained pump can reduce your costs, while increasing efficiency. For instance, by ensuring your pump investment brings an ease-of-service design, the time you spend on maintenance can be significantly minimized.
Using the informatio...
Belleville Wire Cloth would like to announce that they will be going LIVE with their new web page this week! A new, updated, and more user-friendly web page will be found at the domain www.bwire.com . The main focus of the new website will be ease of use for the visitor. The page will include more photos, products, and several new features that were not readily available on the old web site, including an opinion poll on the home page. Belleville Wire Cloth remaind focused on displaying their latest wire mesh and...
Candy ManufacturerPt. Mayora Indah Tbk.IndonesiaPROBLEM: High levels of finished product being rejected due to ferrous contamination.SOLUTION: Beny Hermawan of PT. Sinarmentari Indoprima the Indonesia distributor for OEI installed an OEI magnetic filter rod (3RNC5812) in an existing T-Strainer on the finished product line (photo A).RESULTS: Photo B: contamination captured 44 grams of ferrous contamination after only 2 days of production. “Since installing the OEI magnetic filter our product rejection from metal...
König + Neurath AG, one of the leading European office furniture manufacturers, in Karben near Frankfurt/Main besides other materials process derived timber products such as chipboards and multiplex boards to produce office furniture for nearly any furnishing purpose. The resulting wood residues are not discharged but processed to become combustible by means of which the complete heating and process heat demand of the company is met.
Up-to-date production Central components of this up-to-date production...
It happens to countless homeowners around the end of the year – you make the annual visit to your attic to collect the holiday decorations and what do you find? Spots and blotches covering the bottom of the roof sheathing. Worse yet – it turns out to be attic mold! What does energy conservation have to do with mold in the attic? Well if you take a step back and consider how the house behaves as system, they are often directly related. Building science experts have long been using the “house as a system” approach...
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Whole life costs are playing an ever-more important role in pump selection by the water and wastewater industry. Interestingly, energy use is no longer the benchmark for making efficiency and cost comparisons, according to Philip Bolton, water industry specialist at Watson-Marlow Bredel.
For engineers and plant managers in the water industry, pump selection has long been a complex and time-consuming task, usually involving the collection and analysis of significant volumes of information...
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The problem
Water companies typically keep their network asset data either in a GIS or in a number of different files of different formats and ownership; some companies use a combination of the two. The management of such data repositories is often an ongoing headache for water engineers, especially at the time of data entry – import into the database– and at the point of using the data – exporting the data from the database. These problems usually stem from the following...
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One of the key words being used in the water and wastewater industry globally is ‘risk' . Asset managers now plan the most cost-effective approaches to managing their network by determining the risk grade for each asset.
Risk is the product of two factors – the impact of failure, multiplied by the probability of failure. However, measuring these two factors is a time-consuming process if approached manually, and utilities rarely have the level of engineerin...
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Intro
Clandestine labs have become prevalent across America. They are used for the illicit production of illegal drugs, mostly methamphetamine, PCP, GHB, or MDA (Ecstasy). Some labs have even been found with the raw materials used to concoct homemade bombs. Law enforcement departments have seen a significant rise in occurrences over the last ten years. The hazardous materials found on these premises have to be properly cleaned up. In a three year span between 2000-2002 there were...
From California to New Jersey, environmentalists and politicians are rounding on emissions trading programmes. David Biello reports
Even as the Bush administration continues to build support for market mechanisms to solve air pollution issues – under his Clear Skies initiative – emissions trading schemes from California to New Jersey are under attack from environmentalists, citizen advocacy groups and state governments.
In New York State, Governor George Pataki is continuing a legal battle over the trading of...
At the request of the Environment Directorate-General of the European Commission, BRGM (Bureau de Recherches Géologiques et Minières) has conducted a study on the management of mining, quarrying and ore-processing waste in the European Union.
This project was completed mainly through the use of questionnaire sent to sub- contractors in almost each country of the EU. To assess this information and to extrapolate to the next twenty years, this approach has been reinforced using published estimators1 on the waste...
A wave of privatization is rolling through the water industry – at the environment‘s expense? In order to provide an answer to this question, the Environmental-Rating agency oekom research AG, Munich, put a number of water supply companies and manufacturers of water appliances to the environmental test. In results published today, oekom identifies the British water supplier Severn Trent as the environmental leader of the water supply group with a B grade in the overall Environmental-Rating. The Austrian water...
Consider the following recent examples of pollution prevention in chemical process plants:
An Adiponitrile plant in Orange, Texas installed an inexpensive solenoid valve on the line supplying process water to flush the seals of process pumps used in intermittent service. The solenoid, which is connected to the pump control system, shuts off flush water when the pumps are not running. As a result, the plant has reduced its waste water volume by 57 million gallons per year.
The same facility upgraded the...
When properly applied, ion exchange for concentrated ion recovery is by far the best available technology. Where effluent streams can be filtered and ions requiring different regenerants can be segregated, ion exchange is usually the most cost effective and least capital intensive solution. We provide 4 levels of integration to cover most applications and capital budgets. The variations in the system configuration trade your labor and attention for our automation. As you invest capital, the cost of operation,...
Background
Wynnum Car Renovators Panel Beating & Towing (WCR) is a medium sized spray painting and panel beating workshop which employs eight staff. Over the years, Peter Watson (Manager of WCR) has been continuously thinking of ways to improve his business productivity, reduce operating costs, and help protect the environment.
He has to date introduced a number of waste reducing work practices including:
the recycling of cardboard and metal parts;
the re-use of coolant where possible; and
the use of...
The sheer range of applications for filtration equipment in the food, beer and beverage filling industries is staggering. Every filling-processing operation has at least two filtration units installed and there has been a general move towards the use of more efficient systems, both for improving product integrity and to meet increasingly sensitive environmental considerations with regard to effluents.
Two interrelated trends are evident in the use of filtration equipment today: these are recognition of the...
When selecting filtration technology, industrial users have long wrestled with the tradeoffs of dirt-holding capacity versus particle selectivity or quick-and-dirty change-outs versus process time. For many applications, a self-contained rolled filter offers an effective solution to both problems.
Constructed with polypropylene hardware and various media in a spiral-wound design, rolled filters create a tangential crossflow motion that sweeps particulates across the media and traps contaminants in special,...
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