Frequently Asked Questions

/Frequently Asked Questions
Frequently Asked Questions2016-12-20T11:33:23+00:00
What does PED mean?2018-01-12T09:51:09+00:00

The Pressure Equipment Directive (PED) 2014/68/EU (formerly 97/23/EC) of the European Union sets out the standards for the design and fabrication of pressure equipment (e.g. valves, steam boilerspressure vesselspiping, etc.). The certified product allows for the free placing on the European market without local legislative barriers. Many other countries have adopted and/or accepted the PED or have made their own requirements based on the PED (e.g. South Africa, PER 2009 – section 43 of the Occupational Health and Safety Act, 1993 (Act No. 85 of 1993) / SANS 347).

What does SIL, SIS, and SIF mean?2017-03-23T08:07:50+00:00

SIL (Safety Integrity Level) is a unit of measurement for quantifying risk reduction. The SIL principle is used to reduce risk posed by technical equipment and is defined within a range from 1 (lowest) to 4 (highest). The SIL 3 capable rating which has been achieved by AZ-Armaturen South Africa is designed to provide our customers reliable actuation solutions in critical applications without compromising their Safety Instrumented Systems (SIS).

SIS (Safety Instrumented System) is the implementation of one or more Safety Instrumented Functions. A SIS is composed of any combination of sensor(s), logic solver(s), and final element(s).

SIF (Safety Instrumented Function) is a set of equipment intended to reduce the risk due to a specific hazard (a safety loop).

What does cavity free mean?2016-12-20T11:33:24+00:00

Plug valve Solution:

The sealing surfaces of ball valves are completely exposed to aggressive media due to cavities in an opened position. With the plug valve, sealing surfaces are completely covered with a PTFE sleeve – no cavities, consequent protection from aggressive media. Guaranteeing long product life cycle.

BallValves-ProblemPlugValve-Solution

 

What medium can the valves handle?2016-02-15T18:26:38+00:00

AZ-Armaturen manufactures a wide range of valves for various applications. Our valves can handle many different mediums such as various chemicals, acids, slurries, gases, steam, powders, solids, resins, etc. Please contact us for detailed clarification regarding your application.

What does “Face to Face” mean?2016-02-15T18:26:46+00:00

The face-to-face or end-to-end dimension is the distance from the face of the inlet port to the face of the outlet port of the valve.

What temperature can the valves handle?2016-02-15T18:26:54+00:00

AZ-Armaturen manufactures valves for a temperature range from -196°C to +350°C. Please contact us to clarify technical details if the temperature is below – 10°C and above +200°C.

Does AZ South Africa service valves?2016-02-15T18:27:04+00:00

Yes, AZ-Armaturen refurbishes all AZ products, all different types of plug valves and the complete operation package with actuator, position, limit switches, etc.

What is PTFE?2016-02-15T18:27:16+00:00

PTFE stands for Polytetrafluoroethylene which is a synthetic fluoropolymer of tetrafluoroethylene that has numerous applications. The best known brand name of PTFE is Teflon by DuPont. PTFE is used as a non-stick coating for pans and other applications. It is very non-reactive and so it is often used in the industry for parts which are in contact with reactive and corrosive chemicals. Therefore, it is often used for gaskets and sealings in valves. AZ-Armaturen uses PTFE and PTFE based materials for sleeves and gaskets. The combination of the PTFE material and the design and specific assembly of the AZ-Armaturen valves makes them free of cavities and maintenance.

What materials does AZ-Armaturen use?2016-02-15T18:27:25+00:00

AZ-Armaturen manufactures valves for many different applications, most of the valves are used in difficult, dangerous and hazardous processes. Therefore, AZ-Armaturen manufactures its valves in various materials such as:

  • Carbon Steel (WCB, LCB, LCC, 1.0619, 1.1138, etc.)
  • Ductile Iron (GGG40.3, GR60-40-18, SG42, etc.)
  • Stainless Steel (CF8M, CF8, CF3, 1.4408, etc.)
  • Alloy 20, CN7M, 1.4500
  • Duplex, Superduplex
  • Hastelloy B/C
  • Inconel
  • Monel
  • Nickel
  • Titanium
  • Tantalum
  • Zirconium
  • etc.

Please contact us should you have any questions regarding materials.

What does “Operation” mean?2016-02-15T18:27:30+00:00

Every valve has to be actuated in order to open and close it. Operation stands for the way the valve is opening and closing. The most common operations are: manual (lever, handwheel, gearbox), pneumatic, electric, hydraulic.

What is a Control Valve?2016-02-15T18:27:37+00:00

Control valves are valves used to control conditions such as flow, pressure, temperature, and liquid level by fully or partially opening or closing in response to signals received from controllers. The controllers receive values from sensors which monitor changes in the service conditions and then compare the “setpoint” to the current “service condition”.

The opening or closing of control valves is usually done automatically by electrical, hydraulic or pneumatic actuators. Positioners are used to control the opening or closing of the actuator based on electric, or pneumatic signals. AZ-Armaturen also manufactures and supplies complete Plug Control Valves for various applications.

What are Service Conditions?2016-02-15T18:27:46+00:00

The service conditions are the conditions under which a valve operates in the plant. While choosing a valve for a specific operation, the service conditions should be known in order to make an informative decision. The minimum service conditions to choose a valve are as follows:

P  =  Pressure
T  =  Temperature
M =  Medium
A  = State of Aggregate

For severe conditions and for control applications, further information about the service conditions (e.g. differential pressure, velocity, flow rate, operating cycles, etc.) are essential to choose the correct valve.

Do the valves of AZ-Armaturen South Africa comply with the designated 70% local content according to SATS 1286:2011?2016-02-15T18:28:01+00:00

Yes, most of the products which are purchased by our customers are manufactured in South Africa and have a minimum of 70% local content according to SATS 1286:2011. Please contact us for any further Information.

Does AZ-Armaturen South Africa manufacture valves?2016-02-15T18:28:14+00:00

Since 1985, AZ-Armaturen South Africa has been manufacturing valves in South Africa. Furthermore, AZ-Armaturen South Africa purchases a lot of castings & raw materials from South African suppliers.

Are we a South African Company?2016-12-20T11:33:24+00:00

Yes, the company was established in 1985 in South Africa. AZ-Armaturen South Africa is based at 28 Derick Coetzee Street, Jet Park, Boksburg 1459, South Africa. The company belongs to the German AZ Group which has further production plants and foundries in Germany, Brazil and China.

Do we have an emergency service?2016-02-15T18:28:36+00:00

Yes, AZ-Armaturen South Africa has an emergency 24/7/365 response service in place. In order to benefit from this service you have to register your company for it. Please contact us for further Information.