There are several different types of dosing unit. For example some are designed for chlorination and de-chlorination.

Generally this type of unit enables up to 1m3 per minute or 60m3 per hour to be chlorinated at speeds of 10-100 ppm.

An integral ball valve controls flow through the unit which is monitored using a digital flow sensor and display.

Within medium to large storage tanks, reservoirs and district metred areas (DMA’s) the trailer can be used to raise chlorine levels.

These types of machine can generally be used to dose most chemicals used within the water industry.

A Modular 308 model is hydraulically driven by the water it is dosing. They can be installed and operated by one person. They do not use electricity or electronics and are very low maintenance whilst being highly reliable.

These machines are flow proportional which means that dosing remains consistent even if the pressure or flow does not.

It can be used with most chemicals that are utilised within the water industry. This model can chlorinate up to 8000 lph at 14-140 ppm when using 14% concentrate.

Other dosing units are designed to be used in sewers. They allow for effective sewage disposal whilst maintaining low liquid flow rates. As people become more concerned with saving water many new buildings and renovations are installing water saving devices such as low flow shower heads and low flush toilets.

This can cause problems as waste water flow decreases and waste solids are not carried completely to the main sewage pipes which can cause blockages.

Sewage Dosing Units make using low flush toilets and other water saving devices much more effective. Tests have shown that this type of unit allows for the use of low flush toilets and can use as little as 0.8L of water to push waste more than 25m along a typical waste water drainpipe.

Tests have shown that a 3 litre water saving toilet can push solids is about 10 metres after ten flushes. Adding a Sewage Dosing Unit increased this distance to about 20 m on the first flush and further than 25 m with the second flush.

Another advantage of the Sewage Dosing Unit is that it can use more than just toilet waste water to clear the drains. This keeps drains clear and helps prevent blockages.

Sewage dosing units are becoming much more popular as more and more green plumbers realise that they work particularly efficiently and are also helpful in terms of conserving water and having less impact on the environment.

A pump is a device that is used to move liquids. A water pump displaces water by physical or mechanical action.

Different types of water pumps include positive displacement pumps. This type of pump causes liquid to move by trapping a fixed amount of it and then forcing it into a discharge pipe.

A positive displacement pump can also have an expanding cavity on the side that has suction and a decreasing cavity on the side that discharges.

As liquid flows into the pump the cavity on the suction side expands and decreases on the discharge side causing the liquid to be forced out. Given each cycle of operation the volume is constant.

This type of pump can be classified further depending on the kind of mechanism it utilises. For example:

• Rotary
• Internal gear
• Screw
• Shuttle block
• Flexible vein
• Sliding vein
• Circumferential position
• Helical twisted roots
• Liquid ring valve pumps

Positive replacement rotary pumps use the principles of rotation to move liquid. The rotation of the pump causes a vacuum which draws the liquid out. This type of pump is very efficient as it removes air from the lines automatically which eliminates the need for bleeding.

However this type of pump does have disadvantages. The clearance between the outer edge and the rotating pump must be very close meaning that they must be operated at a slow steady speed. If they are operated at too high a speed this can cause erosion in the mechanism which makes the pump less efficient over time.

Positive displacement rotary pumps are generally grouped into three different types. Gear pumps are the least complex type. They consist of two gears laid side by side with enmeshed teeth. A current traps liquid between the teeth as the gears move away from each other. Small teeth maintain a constant flow of fluid whereas large teeth cause a gushing effect.

Screw pumps are more complex and feature two or three screws with opposing threads. One screw turns clockwise and the other turns anti clockwise. The screws are mounted on shafts that run parallel to each other. The shafts also have gears which mesh with each other in order to turn the shafts together and keep all the components in place.  The turning of the screws draws the fluid through the pump. As with many types of pumps the distance is small between the pumps parts and the casings.

Vernon Morris Utility Solutions reveal the “VIP” Valve Integrity Protection System – a new level of control & visibility for Asset Management.

Utilising the latest in RFID technology, the VIP System enables tagged Assets to be scanned & recorded, with data instantly transferred to a Toughbook onsite. Operatives in the field can then input information about each Asset, record the status of the Asset, log repairs needed & location, as well as uploading images, graphs & maps. Click image to view full size.

Once submitted, the information can be viewed by managers & colleagues in real-time from anywhere, by a secure log-in to www.vip-database.com

Online users can easily see every Asset in an area plotted online to Bing maps. Users can view Asset information by DMA, Zone, Date, Operative & more, and can then drill down into each Asset with options to click through to information, images, plans & graphs. The VIP System brings a whole new approach to Asset Management.

Ian Greenwell, UK Sales Manager at Vernon Morris commented “With the click of a button the VIP System enables you to remotely view any Assets in great detail, easily track repair status & visualise Asset location – you can search within DMA’s, view a full service history or monitor Operatives performance. The VIP System is a cost effective solution and really puts Asset Management Information at your fingertips. The easy to interpret reports can be exported as a PDF for further analysis.”

The VIP System can also be tailored to the needs or requirements of individual water companies & authorities’.

With over 40 years experience in the water industry, Vernon Morris Utility Solutions is an innovative & leading provider of solutions to the water utility industry.

The Vernon Morris team are always on hand to answer your questions on water management.

Contact us on: 01224 660 794 sales@vernonmorris.co.uk www.vernonmorris.co.uk

Submersible pumps such as bilge pumps are generally used to remove water from the bilges of boats. As there can often be fuel present in the water electric bilge pumps are designed not to spark so as not to ignite any fuel that may be present.

Many bilge pumps are fitted with automatic switches that turn the pump on when the bilge water reaches a certain level. A primary pump is normally located at the lowest point of the bilge, with a secondary pump mounted a little higher. It’s generally recommended to have a secondary bilge to pick up the slack if the first pump is overwhelmed.

At Vernon Morris we supply a wide range of pumps including the Whale 1300, the Rule 500, the Thames Pump and the POWEPACK 2.

Our Whale 1300 Submersible Bilge Pump is both compact and powerful. The pump is high performance, easy to install and meets marine standard.

The pump has a low amp draw which equates to a long battery life. The pump is easy to maintain with easy access to the motor cartridge and filter area.

Our Thames Pumps come complete with hose, container cover, hose connector and storage clip. They are self priming and quiet in operation. The pump fits both Crystal filter housing and Mk2 winter conversion housing.

Choose from our wide selection of submersible pumps for use on boats, caravans, in the home and much more.

The DPI 104 is available in pressure ranges up to 20,000 psi (1400 bar), surpassing competitive products that typically handle pressures only up to 10,000 psi (700 bar), while maintaining 0.05% FS accuracy. The DPI 104 can function either as a stand-alone process indicator, or as a test device using a line of hand pumps. The DPI 104 features standard functions such as min/max, tare, alarm, switch test and 0-5V analog output. The meter is designed to maximize the operator’s ease of use, with features including intuitive menu display, a round 20-segment bar graph that provides a quick visual pressure estimate, a numeric indication of percent full scale and a faceplate that can be rotated in any direction for easy viewing.

The DPI 104 is a microprocessor-controlled digital pressure gauge that combines precision and functionality in a compact, robust and simple-to-use package. The DPI 104 matches advanced silicon sensor technology with several convenient design features resulting in an accurate, versatile yet affordable digital test gauge.
Supplied as a standalone process indicator or in a kit with the widely proven hand pumps, the DPI 104 provides a reliable and economic solution for a wide range of pressure sensing applications.

Advanced silicon technology delivers 0.05% accuracy over ranges to 20,000 psi, min/max, tare and alarm functions, analog output and a pressure switch test function making the DPI 104 suitable for a wide array of pressure sensing applications.

Many of the processes in the modern world involve the measurement and control of pressurised liquid and gas systems. This monitoring reflects certain performance criteria that must be controlled to produce the desirable results of the process and insure its safe operation. Boilers, refineries, water systems, and compressed gas systems are but a few of the many applications for pressure gauges.

The mechanical pressure indicating instrument, or gauge, consists of an elastic pressure element; a threaded connection means called the “socket”; a sector and pinion gear mechanism called the “movement”; and the protective case, dial, and viewing lens assembly. The elastic pressure element is the member that actually displaces or moves due to the influence of pressure. When properly designed, this pressure element is both highly accurate and repeatable. The pressure element is connected to the geared “movement” mechanism, which in turn rotates a pointer throughout a graduated dial. It is the pointer’s position relative to the graduations that the viewer uses to determine the pressure indication.
The most common pressure gauge design was invented by French industrialist Eugene Bourdon in 1849. It utilises a curved tube design as the pressure sensing element. A less common pressure element design is the diaphragm or disk type, which is especially sensitive at lower pressures.

A “C” shaped, hollow spring tube is closed and sealed at one end. The opposite end is securely sealed and bonded to the socket, the threaded connection means. When the pressure medium (such as air, oil, or water) enters the tube through the socket, the pressure differential from the inside to the outside causes the tube to move. The direction of this movement is determined by the curvature of the tubing, with the inside radius being slightly shorter than the outside radius. A specific amount of pressure causes the “C” shape to open up, or stretch, a specific distance. When the pressure is removed, the spring nature of the tube material returns the tube to its original shape and the tip to its original position relative to the socket.

The BetaGauge PI combines the accuracy of digital technology with the simplicity of an analog gauge. The BetaGauge PI is fast and straight forward to set up. It is set up through a menu-driven display with intuitive functions making it simple enough to allow the gauge to be used anywhere in the world without the need for multilingual displays.

The BetaGauge PI provides 0.05% of full scale readings of pressure in any one of eight ranges. Reading may be displayed in any one of 18 standard engineering units, or in custom units that you define, eliminating tedious conversion calculations. The BetaGauge PI is also temperature compensated to retain its accuracy over its entire operating range.

In addition to a zero function that compensates for sensor drift, large residual system pressures can be nulled using the Tare adjustment. This adjustment, when combined with the ability to create custom engineering units for display, allows the BetaGauge PI to be used in a variety of liquid level and volume measurements, easily reading units of interest, such as gallons in a tank directly.

Features of the BetaGauge PI:
• Password protected calibration
• Auto shut-off
• Min/max recall
• Eight standard pressure gauges
• Low battery indicator
• Temperature compensated accuracy over 0 to 50°C
• High accuracy compared to analog test gauges
• Displays in 18 standard or fully custom engineering units

The PL200-G Water Pressure Data Loggers are the latest addition to remote water pressure recording instrumentation. The Water Pressure Loggers make it easy to verify low water pressure complaints, locate water pressure spikes, and even provide water distribution system modelling data. The Water Pressure Loggers’ large memory buffer will store over 81,000 water pressure readings with user defined intervals from 1 per second to more than 1 per year. Plus, you can easily capture momentary pressure spikes and dips with the Water Pressure Logger’s fast, 10 water pressure samples per second sampling mode.

The Water Pressure Loggers’ programmable start and stop alarm times makes it possible to synchronize multiple water pressure data loggers to start at the same time, delay starting until a preset time, or limit the number of recordings during a day. With the Water Pressure Data Loggers standard ¾ inch garden hose connection and compact, water resistant enclosure, the PL200-G Water Pressure Data Loggers can record water pressure data just about anywhere you need it. The Water Pressure Data Loggers operate on two standard 9 volt batteries, which they monitor so you are never caught off guard with dead batteries. A third onboard lithium battery ensures your water pressure data will be safe in the event you are unable to change the 9V batteries before they fail.

Applications
The PL200-G Water Pressure Data Loggers are best suited to watch and evaluate client water pressure complaints. The Water Pressure Loggers were specifically designed for this application and have taken into account the need to be portable, rugged, and provide time-stamped water pressure data that can be compared with the water pressure being delivered by the local water utility.

These types of metres are commonly used in Oxygen tanks and are usually comprised of a pressure gauge and a variable area meter, more commonly known as a Rotameter. The rotameter is very common in hospitals and laboratory applications as an air flow meter device. The rotameter is not limited to certain types of gas but can be pre fabricated for use as a nitrogen flow meter or as a specialty gases .

The regulator is coupled to the oxygen flow meter and by visual inspection the user is able to see the flow rate by a flow scale marked on the rotameter. Combining the rotameter and oxygen regulator as a complete set creates a new product called an oxygen flow controller.

Mass Air Flow Meters

Other industries also require air or gas flow controllers. Not only for oxygen flow applications but also for natural gas, compressed air, hydrogen monitoring, land fill gas monitoring and chlorine gas.

The control processes can be of multiple types and are normally automated and so it is important to use a device that is relatively accurate, reliable, easy to install and affordable. This is where the Mass Flow Meter comes into play. This is an air consumption meter that measures how much air is flowing through a tube. IT does not measure the volume of the air passing through the tube but the actual speed of the air flowing through the device in a defined time segment. Typically, mass air flow measurement is expressed in the units of kilograms per hour.

Huntingdon Fusion techniques have a wide range of products available designed specifically to provide temporary sealing when conducting leak and pressure testing.

Used for applications as diverse as checking rainwater systems, drains and car radiators it is likely that something in the HFT portfolio is available to help speed up testing procedures. The overall range of products covers everything between 12 and 1000 mm and includes a selection of inflatable bags capable of sealing spherical and rectangular orifices. Special versions can be made to order-a major advantage offered by HFT because of its unique position as designer and manufacturer.

At the small end of the expandable range (12 to 150 mm diameter) the most commonly used product is constructed from and based on a nylon body which can be supplied with a natural or synthetic rubber sealing ring depending upon the application environment. Steel-based designs cover ranges between 50 and 1000 mm whilst aluminium is specifically employed for applications with ranges between 37 and 1000 mm.

Expandable devices are extremely useful for temporary seals. They are operated by applying a radial force onto the flexible seal through a manually operated screw within the base. Inflatable stoppers are constructed using a high grade latex inner tube and a polythene impregnated nylon outer cover. They can be made to accommodate a range of diameters between 300 and 1800 mm but can also be produced to seal rectangular and as well as irregular shapes.

Using products that are specifically designed for providing a temporary seal will ensure the leak is safe until it is fixed permanently.