The difference between RSV Gate valves and Wedge Gate valves.
Wedge gate valves (a.k.a gate valves) have a metal wedge which is forced against metal seats…
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Making electricity from water.
Most people imagine massive dams with long expensive approval processes when if they think about generating…
Reservoir level control applications
One of the most common applications for self-actuated control valves is reservoir level control. At first…
Best practice for scour valve applications.
A pipeline needs one or more scour valves so it can be drained – usually for…
Water Savings in Domestic Uses
South Africa and other countries on the African continent are running out of water! The volume…
Control valves for Pressure Management
Pressure management has become a crucial tool to reduce water losses in pipe networks. It brings…
Ratio reducing valves in the water industry
Say “pressure reducing valve” to someone in the water industry and they’ll assume you’re referring to…
Modern Solutions for Level Control Systems on Reservoirs
Both pressure and flow velocity must be considered when designing reservoir level control systems. Pressure considerations…
Diaphragm valves for water level control
Standard pilot-operated globe control valves are often specified for level control. But, they are not suitable…
How ARI designs air-valves for the lowest possible total cost of ownership.
We have a professional responsibility to consider the total cost of ownership of equipment we specify.…
Selection criteria for water control valves
For most engineers the criteria for selecting control valves is confusing. Usually they end up specifying…
Combined Surge Protection for a 4-Stage Pumping Station System in the North of Mexico
The following article was written by Alan Sunudo of A.R.I. Flow Mexico and republished here with…
The importance of air valves that don’t leak.
Air valves are vital in pipelines and pump stations. They allow air to escape from pipelines…
Some considerations in check valve selection
Check valves on pump installations. Check valves are generally installed on pump delivery manifolds to prevent…
CPD: Water hammer course
I have developed a course on water hammer. The course is accredited by ECSA (The Engineering…
Safe Pressure Reducing Stations
A break pressure tank or reservoir is often used when the topography causes pipeline pressure to…
Water loss savings: A new approach.
Networks leak. Reducing pressure during periods of low demand has long been a strategy to reduce…
How we’re using valves to save Cape Town.
You probably know that Cape Town is running out of water. Reducing water loss is an…
How air pockets in wastewater systems lead to corrosion and broken pipes.
Recent research has shown that air pockets cause extensive damage and hindrance. They reduce flow capacity…
Centrifugal pump protection using flow controllers
A correctly-sized flow controller close to the pump discharge provides tamper-resistant protection for centrifugal pumps. Running…
Pressure reducing systems for housing complexes
Housing complexes need pressure reducing valves for several reasons: Higher supply pressure (from municipalities and waterboards)…
New Developments in the Air Valve Evolution
Air vales have received a lot of attention because they play such a crucial role in…
KITE ( KZN Industrial Technology Expo) in Durban 26-28 July
We’ll be exhibiting and talking about new developments in water loss prevention and water saving at…
Pressure reducing valves for residential complexes
Water pressure from the municipal mains is too high in most residential complexes. Taps, geysers etc…
When to use butterfly valves instead of gate valves.
Butterfly valve are chosen more often recently for the following reasons: Cheaper than gate valves. Easy…
Using air-valves for surge suppression
Did you know that a 3-stage air valve can be used for surge suppression instead of…
The challenges of reticulating water in high-rise buildings.
Many suburban areas are being rezoned as high-density areas and it is expected that the number…
New Phase in the growth of A.R.I. Air valves in South Africa
A.R.I. has been in South Africa for approximately 20 years, and has shown steady growth over…
Air valves for Sewage and Slurry Pipelines and Pump Stations
Air valves for the water industry are commonly the focal product for engineering, client and valve…
Automatic Diaphragm Level Control Valves
Self actuated pilot operated control valves are in use worldwide and have become the natural choice…
The effect of valve closure speed on surge pressures
Control valves play a major role in controlling surge (water-hammer) pressures in most pumping and pipeline…
The Art of Specifying in the Valve Industry
Like most industries, marketing experts try to distinguish their products from those of their competitors, by…
Simplified control options for irrigation systems
Traditional irrigation systems use a multitude of pilot operated, self actuated, control valves for in-field pressure…
Simple Water Loss Saving Techniques and Equipment
Pressure management has, for many years, been considered a “quick fix”, and “quick return on investment”…
Water Distribution in High Rise Buildings
A better Solution for Water reticulation in High Rise Buildings.Water is often supplied to high rise…
Air valves with ball floats
Most of the original automatic air valves were based on having hollow balls as the most…
Pump Control Valves for Borehole Applications
Traditional pump control valves are used for the following reasons: Soft start-up of the pump –…
Control valves for Pressure Management
Pressure management has become a very important element in the fight to reduce unaccounted-for water losses…
Status of the air valve market in South Africa
Air valves have always played a big role in the South African Water Industry, as Academics…
Specifying modern air valves
When Vent-O-Mat air valves first came on the market in South Africa, more than 20 years…
Ratio reducing valves
Ratio Reducing Valves … The Next Evolution in Pressure Reducing Valves
A.R.I. Israel English Seminar February 2015
A.R.I. Israel English Seminar February 2015 invite.
Innovative Control and Water Savings using the Maric Flow Controller
Maric Flow Controllers have been discovered by the Mining Industry as a very simple control valve…
Technical comparison between 3 major Water Control valve styles used in South Africa and Worldwide
Technical comparison between 3 major Water Control valve styles used in South Africa and Worldwide The…
Pressure Reducing Stations for Deep Mining
Pressure reducing stations have become the norm for the deep mining industry. There are many different…
New Technology in Air Valve design
Good hydraulic integrity in any pipeline is essential. The continual focus on development in the design…
Modern Designs of Large Bore Pump Stations
Pump Station designs have evolved over the years. This is due to new designs of valves…
Surge Tank vs Air Valves in Water Hammer reduction
Surge tanks are one of the oldest of surge alleviation methods. In the past they were…
The results of water hammer
Many papers have been written about the results of water hammer damage to pipelines and pumping…
Choosing the right valve for large bore sewage systems
Gate valves and knife gate valves are probably the most common styles used in sewage systems.…
The importance of the small Automatic orifice in Air valves
Most modern combination air valves have at least two orifices, which serve three functions as follows:…
Some considerations in sizing Pressure Reducing valves for water pipelines
Self actuated Pilot Operated Water Control Valves are very flexible in that they can be used…
The use of Maric Flow Controllers on Slurry Pump Gland Service Water
Small pressure reducing valves have long been used to control the pressures into the glands of…
Preventing waterhammer damage in pipelines
In part 1 of this article we looked at the use of check valves to reduce…
SURGE SEMINAR
Download all the details of the 2013 Surge Seminar here: Surge Seminar 2013. Ultra has been…
Choosing the right check valve to prevent waterhammer damage.
Waterhammer destroys pipes, pumps, valves and reputations. It’s often caused by pump power failures and valves…
Level Control Systems for Reservoirs
Choose the wrong level control valve and it could fail in weeks. There are many ways…
AIR VALVES ON WATER PIPELINES
Most design engineers are aware of the danger of having air in Liquid pipelines. Problems associated…
SURGE SEMINAR 2011
Visit www.surgeseminar.co.za for more reasonsto register now for Surge 2011. ©Point 4 Business Services 2011
ENGINEERING SALES TRAINING
What isolating valve to use in water systems is almost like asking “what shall I eat…