The main applications of Onda brazed plate heat exchangers is for the evaporation and condensation of refrigerant gas in air-conditioning and refrigeration plants, the hot water production in heat pumps and heat recovery. Onda's brazed plate heat exchangers are compatible with all modern refrigerants.

Only top quality materials are used in the manufacture the ONDA brazed plate heat exchangers.  The Plate heat exchangers are made from Stainless steel thickness 0.0138” (316L type), the connections are also Stainless steel (304L type) and the brazing material is copper. 

 

Onda advanced heat transfer systems anconAfcon Logo with Onda

Afcon is the sole importer of Onda Brazed Plate Heat Exchangers in South Africa.  Call us now for more information or browse our website http://www.afcon.co.za/onda

 

 

 

 

AFCON ON PAR

The SAIRAC Golf Day held on Friday 8th September, was the usual success and very well supported by the industry, with a record field of 38 four balls.  Thank you to Tarryn Ching for her exceptional organisation.  As always it is fantastic to meet our fellow HVAC&R colleagues in a relaxed atmosphere.

For the third year running Afcon sponsored the 11th hole.  We thank all of you who visited our hole, and are certain the banter and cheer experienced cannot have been rivalled by any other.  It was a glorious day out on the course in sunny Durban.  Our congratulations to the winners of the day and to the Airconditioning Project's four ball who won the SAIRAC trophy.

To view the images bigger please click on each image.  Our marketing team would love to hear your feedback on our new newsletter format.

Afcon SAIRAC Golf DayAfcon and Carel SAIRAC Golf Day

 

 

 

 

 

Afcon and Concorde Refrigeration SAIRAC Golf DayAfcon and Dragt & Associates SAIRAC Golf Day 

 

 

 

 

Afcon SAIRAC Golf DayAfcon SAIRAC Golf Day

 

 

 

 

 

Afcon & Daikin SAIRAC Golf Day

  Afcon & Daikin SAIRAC Golf Day

 

 

 

 

Afcon & Eurocool SAIRAC Golf Day

   Afcon & the Wild Duck Socks SAIRAC Golf Day

 

 

 

 

Afcon & Airconditioning Projects - Dave Cooper, Leigh Waller, Mark Cox SAIRAC Golf Day

Afcon, Airco and CS Air SAIRAC Golf Day

Afcon SAIRAC Golf Day

 

 

 

 

Afcon SAIRAC Golf DayAfcon13 170 100Afcon and Kovco

 

 

 

 

Afcon15 170 100

Afcon & Eurocool SAIRAC Golf DayAfcon and Connies Refrigeration, Connie Steyn and Anna-Rett Steyn SAIRAC Golf Day

 

 

 

 

Afcon SAIRAC Golf DayAfcon SAIRAC Golf Day Afcon SAIRAC Golf Day

 

 
 

 

 


afcon answers cropped

 

 

 

 

 

 

Afcon Customer Profile - Craig Scott

This week we sat down with Craig Scott, of CS Air, to chat about where he started, where he is now, and everything in between.

Craig has been in the HVAC industry for 25 years, and first entered it at Republic Refrigeration and Airco, where his interest was sparked and he began his apprenticeship. Craig went on to work for Republic Refrigeration and Airco for two years thereafter, before moving to ACS, Air-conditioning and Pump Installations, where he worked for the next 10 years.

In 1999 Craig opened his own company and CS Air was born. Over the respective 18 years CS Air has worked on many exciting projects, and found it’s specialty in central plants particularly chilled water plants.

A current example of an exciting project that CS Air is working on, is the systems installation for the new Cornubia Virgin Active. Virgin Active has been a client of CS Air for nearly 25 years, and CS Air has been involved in the majority of Natal’s Virgin Active installations. Another project that CS Air has been able to “sink their teeth into” of late, is the new Sibaya Dunes development, which involves the installation of large Samsung VRV systems in the presidential apartments.

Craig is very passionate about what he does, and he states that his passion comes from his love of the challenge the HVAC industry provides. One of the major challenges of the industry is the technological advancements, which companies must keep abreast of. However Craig stated, that with the support of suppliers who bring in products that allow CS Air to provide the greatest efficiency and cost effectiveness to its clients, these challenges can be overcome.

 

Afcon Craig Scott CS Air

  

 

Afcon AnswersAfcon's Answers

What is the difference between Ethylene Glycol and Propylene Glycol? 

What You Need To Know

Both ethylene glycol and propylene glycol solutions will effectively lower the freezing point of water allowing it to be freely pumped through a variety of heat exchangers, and can be used interchangeably for most applications. While there are many minor variations in the properties between ethylene glycol and propylene glycol solutions, however there are two key differences that dictate which of the glycols is chosen for a particular application, namely toxicity and viscosity.

Toxicity

Ethylene glycol is more toxic than propylene glycol. About 2 - 4 ounces of ethylene glycol can be fatal if ingested by an adult human. Whereas, propylene glycol is a food additive and is not harmful to humans if ingested in moderate amounts. Therefore, propylene glycol solutions are preferred for many applications, particularly when human exposure can occur.

Viscosity

While differences in viscosity between ethylene glycol solutions and propylene glycol solutions at elevated temperatures are minimal, at temperatures below -18C the viscosity differences become significant. If heat transfer at these low temperatures is required, ethylene glycol solutions should be used. In addition, ethylene glycol solutions will require less pumping horsepower under cold conditions. If these liquid characteristics are important, ethylene glycol is usually chosen for the application.

 

major-tech

 Why you Need Major Tech Tools for your work.

Major Tech test instruments have been designed and manufactured to operate under the harshest conditions, offering reliability and accuracy for Engineers, Electricians and Electronic Technicians. Major Tech’s instruments are all made to stringent specifications and offer top quality innovative product, as well as and reliability.Afcon carries a wide range of Major Tech products the most popular being the Multimeters, Clamp-on Meters, Thermo-Hygrometers, Thermometers etc. Afcon can advise and order any specialist equipment required. For a full llist of all the instrumentation both handhel and bench equipment that will assist you in carrying out your work, please contact us using the form button on home page and we will get back to you with the information.

 MT770 1000A AC Clamp Meter Major TechKTK0707SG Screw Driver Set Major TechMT685 Liquid Probe -50ºC ~ 649ºC Major Tech MT600 Digital Pocket Thermometer, -50°C ~ 150°C Major Tech MT25 AC Voltage & Current Data Logger Major Tech

KTV150 150mm Digital Calliper Major TechMT948 Thermo-Anemometer, Separate Vane Major Tech  MTD2 24 Hour Analogue Slim Industrial Timer Major Tech MTD10 Compact Digital Multimeter Major Tech

 

 

 

Afcon AnswersAfcon Answers

What is “Dew Point”?

The Dew point is the temperature at which vapour will condense, or when associated with glide, the higher or highest boiling point of mixture.
 
 

 

afcon answers

 

 

 

 

 

Which fouling factors are suggested for the selection of shell and tube heat exchangers?

The fouling factor is important for the selection of an evaporator. The values suggested to input in selection software are:

For evaporators:
- Normal water in closed circuit: 0,000043 m2K/W;
- Water in open circuit: 0,000086 m2K/W;
- Solutions with glycol <40%: 0,000086 m2K/W;
- Solutions with glycol >40%: 0,000172 m2K/W.

For condensers:
- Normal city water: 0,000043 m2K/W;
- Treated tower water: 0,000043 m2K/W;
- River water: 0,000086 m2K/W;
- Solutions with glycol <40%: 0,000086 m2K/W;
- Solutions with glycol >40%: 0,000172 m2K/W.

 

 

 

Eberle AC Controls

Eberle is a leading European brand that manufactures energy efficient residential and commercial heating and air-conditioning controls. Eberle has over 80 years of experience and prides itself on reliability, quality, technical excellence and sustainable production.

Afcon holds a wide range of, reasonably priced, Eberle controls. This range includes controls with dual heating and cooling options as well as single function controls. We also offer the choice of LED indicators and models with proportional outputs for heating and cooling.

For more information on Eberle AC Controls, and controls technical specifications, click here . . .

 

Eberle Airconditioning Controls Afcon

 

 

 

 

 

GOING GREEN IS COOL

In 2014 F-Gas regulations, in Europe, were amended in order to prompt a phasedown of the use of HFCs. This regulation change was undergone with the hope that HFCs would be reduced to only 21% of its current usage by 2030. This goal is on track to being achieved as a 63% decrease is expected by 2018.

This phase down is being achieved through the introduction of quota allocations and sectorial bans on high-GWP HFCs as well as multiple governments taking further steps to reduce the use of refrigerants with a substantial impact on the environment.

Bitzer has expanded their range of compressors to meet this need for environmentally sustainable refrigeration. The Bitzer Ammonia Compressor Pack (ACP) does just that. Bitzer’s ACP is designed for a wide range of operations in high, mid and low temperature applications in industrial refrigeration and process cooling.

Bitzer Ammonia Compressor Afcon

 

Technical specifications

- Available with a capacity range of 100 to 450 TR

- Modular compressors units comprise up to 3 compressors

- Compressor packs can be connected (up to 9 compressors) and connected to a single controller

- Equipped with frequency inverter

- Common oil separator

 

Advantages

- Optimal part load performance

- High efficiency: individual compressors can be turned on and off depending on requirements

- Maximum redundancy for high operating reliability: system has multiple ammonia screw compressors which increases its reliability over single industrial compressors

- Bitzer advanced oil management system

- Reduced installation costs

- Durability

- Fast availability for all replacement parts


For more infoamtion . . . 

bt download pdf

 

 

 

Afcon AnswersAfcon Answers

What does “Approach” mean in heat exchangers?

 
This term refers to the difference between the leaving process fluid temperature and the change of state temperature of the refrigerant. For evaporators, if water is cooled from 12°C to 6°C and evaporating temperature is 1°C, the approach is 5K. For condensers, if water is warmed from 30°C to 35°C and condensing temperature is 40°C, the approach is 5K.
 
 

bitter logo

Bitzer Compressors and Ammonia Seminar

Following the success of last year’s Roadshow Bitzer South Africa offered another Road Show event in Durban yesterday, covering Bitzer compressors and Ammonia applications.

The event was held at the Durban Country Club. And was a great success. Thank you to all who attended, and to Bitzer South Africa for hosting.

 

If you are interested in the information discussed at this seminar . . .

bt download pdf

Afcon Bitzer Ammonia Compressor Seminar FridgemacAfcon Bitzer Ammonia Compressor Seminar

Afcon Bitzer Ammonia Compressor SeminarAfcon Bitzer Ammonia Compressor Seminar Fridgemac

Afcon Bitzer Ammonia Compressor Seminar

 

Afcon AnswersAfcon Answers

 

 

 

 

What is “Bubble Point”?


The bubble point is the temperature at which a liquid forms bubbles (usually the lowest boiling point of one of the constituents of a mixture like R407C).

 

 

 

 

All the Best for 2017 from Afcon Industrial Equipment. We would like to wish our staff and customers very Happy New Year and a prosperous 2017.

Afcon Africa Afcon Africa Afcon Africa

Afcon have supplied equipment into Africa for many years and we continue to supply products and equipment to many African countries. With the range of products and agencies that we are able to supply, Afcon have raised their presence in Africa during 2016.  As a refrigeration wholesaler with everything from copper piping, Refrigeration Gas, Parts and equipment, this includes modular refrigeration equipment that is ready to install and built to custom specifications. We have the pleasure and privilege of supplying some of the world best refrigeration products. Afcon are well situated to supply you with world class products and equipment from our many suppliers that we have acquired agencies for.
So from Cape town to Cairo, Afcon are able to supply you with your refrigeration requirements.
 

BITZER REFRIGERANT RULER

By BITZER

Open iTunes to buy and download apps.
Description
The BITZER REFRIGERANT RULER Work out refrigerant data – quickly and easily – with the free BITZER REFRIGERANT RULER from BITZER. The BITZER REFRIGERANT RULER, developed for iOS, covers all of the common refrigerants and contains data on their relevant physical properties. It offers an intuitive user interface with which it is quite simple to work out temperature and pressure for various refrigerants. The tool is one of the few applications which enables the use of imperial and metric units at the same time. It is available in both English and German. The main functions On the start screen, the user is shown all of the relevant information about the selected refrigerant, such as its dew and bubble point depending upon the pressure, as well as information about the best type of oil to use, the refrigerant’s global warming potential (GWP value) and its safety group. A ‘Refrigerants’ menu at the top-left edge of the screen gives you an overview of all available refrigerants as a list. When you select a refrigerant from the list, you are then shown its details page which contains more valuable information. By swiping to the right or left on the start screen, you can also switch directly to another refrigerant. Settings and filter functions can be found at the top right. The filter functions make it possible to restrict the refrigerants shown by their GWP values or to just show natural refrigerants. The settings allow you to switch between metric and imperial units. Additional advantages of the BITZER REFRIGERANT RULER The extra functions to select for natural refrigerants and for GWP values are two new and convenient options. Moreover, you can also access BITZER’s latest refrigerant report directly from the app!
 
https://play.google.com/store/apps/details?id=com.bitzerus.refrigerant.ruler
https://itunes.apple.com/us/app/bitzer-refrigerant-ruler/id373683792?l=de&ls=1&mt=8

 

Afcon Bitzer refrigerant ruler Afcon Bitzer refrigerant ruler

10′s of thousands of LPA® pumps have been installed as a simple retrofit means of getting liquid refrigerant to the expansion valves when minimum head pressure controls are set to reduced head pressures, thereby saving energy and increasing capacity at mild to cold outdoor temperatures.
The LPA® pump eliminates the usual problems of capacity loss and poor oil return due to operating with low head pressure.
Improved performance and efficiency of a system that has flash vapor in the liquid line. This is especially apparent if flash vapor is a serious problem, as in systems with excessive liquid line pressure drop, elevation gain in the liquid line, or if the air surrounding the liquid line is warmer than the outdoor temperature.
Reduced scaling problems on water-cooled systems when a small amount of high pressure liquid from the pump outlet is injected into the discharge line, reducing the vapour temperature.Afcon Hysave LPA retrofit pumps

The LPA works by boosting liquid refrigerant through the system…

The LPA works by boosting liquid refrigerant through the refrigeration system. By increasing the liquid’s pressure, the associated saturation temperature is raised, while the liquid temperature remains the same. The liquid becomes sub-cooled; reducing the potential for flashing prior to the expansion valve. With LPA, your business will enjoy higher efficiency, lower power draws and substantial cost savings.

reciprocating compressor cylinder head cooling LPA pump Hysave Afcon 

 

Taken from: http://www.hysave.com/technology/lpa-systems/

 

 

Nicknamed the work dog, now available with a high strength stainless steel housing to meet with pressures on demand. Built to stand up under heavy loads, LPA (Liquid Pressure Amplification) pumps, are equipped with built-in overload protection. Under adverse conditions, the magnetic drive acts as a clutch to eliminate overloading and motor burnouts.
The 875-SS-050-VSD (Variable Speed Drive) is now available with a high frequency drive compatible motor designed for continuous use up to 75hz if required.
PS 725 psi / 50 bar
PT 1,036 psi / 72 bar
TS Min -22°F / -30°C
TS Max 160°F / +72°C
Inlet ODF Copper 1-5/8″
Outlet ODF Copper 1-1/8″
Motor Power .75 hp
Voltage 208-230 /460
Ampere 2.4-2.2 / 1.1
Phase 3PH
Frequency 50 / 60Hz
Thermal Overload
REFRIGERANTS: (Fluid Type /GAS GROUP 1&2 /UL Classified)
Co2 R-290 R-134a R-401a R-401b R-401c R-402a R-402b R-404A R-407A R407b R-407c R-408a R-409a R-410A R-500 R-507
OUTDOOR PROTECTION IP54 | Altitude 2000M | Corrosive & Polluting Substance Class 4C2 | Vibration & Shock Class 4S2 | Presence of Dust Class 4S2 | Corrosion Protection Level ClassIP43B
MAINTENANCE: Maintenance free, no service required.
Manufactured to: DIR 97/23/EC “CE” CAT A1 / UL Recognized \ Shipping Weight 46 lb’s | Dimensions L 25″ x W 16″ x H 16″ \ Component Weight 42 lb | Dimensions L 17″ x W 14″ x H 10″
Mechanical Life Wet End Assembly +20 years | Mechanical life Impeller +100,000 continuous hrs | Mechanical Endurance +300,000 cycleshanical Endurance +300,000 cyclesAfcon Hysave LPA retrofit pump
 
 
 
 
SEO Consulting , Marketing