edart portfolio - bricsatc.com · edart portfolio june 2014 · issue 3.0 · [email protected] · 1....

eDART Portfolio

June 2014 · Issue 3.0 · [email protected] · www.edart.co.za

Document Details

Document Name: eDART Profile – General

Document Issue: 3

Abstract: eDART Slurry Valves primary purpose is to provide specialist and customisable slurry valves to serve the international

mineral processing industry. eDART has a complement of divisions which allows the

company to bring new and needed products to the current range and to offer a fuller and more rounded solution

package to the customer.

Original Document Date: 16th August 2010

This Document Date: 24th June 2014

Abbreviations and Definitions

CFD Computational Fluid Dynamics

DVC eDART’s Dual Valve Controller

EFD Engineering Fluid Dynamics – the CFD package eDart uses.

Table of Contents

1. Introduction ......................................................................................................... 2 2. eDART – Company Profile ...................................................................................... 2 3. eDART’s Current Product Range .............................................................................. 4 4. Products in Development ...................................................................................... 11 5. Innovation .......................................................................................................... 11 6. Research and Development ................................................................................... 11 7. Other services eDART offers .................................................................................. 12 8. Portfolio of work .................................................................................................. 13

eDART Portfolio


1. Introduction eDART was established in 2004 to provide specialist slurry valves to the mining and related

industries. Today, this remains the primary focus of the company.

This document is an overview of the eDART company and serves as a short portfolio of work and abilities.

2. eDART – Company Profile 2.1. Company Overview eDART is a South African company founded in 2004 with the objective to supply slurry

control valves to the mineral processing industry. The company has grown and now includes two subsidiary companies – a machine shop for manufacture and an actuator

company.

2.2. Company Objective eDART strives to be the leading company in slurry control valves and associated specialist equipment in the international arena.

2.3. Employment

The eDART group currently has a staff of 40–50 and is in the process of expanding. eDART has its main factory located in Jet Park, South Africa and Design and Analysis Office is in Cape Town.

2.4. Planning and Accounting

eDART has developed and invested in systems which will allow the company to deal with large volumes of work and to expand and grow as necessary. Each Sales Order is managed like a project with a task sharing tool. The product is controlled at all stages with

Syspro – an enterprise resource manager – which interfaces with the 3D-CAD package for BOM communication.

eDART Portfolio


2.5. eDART’s Shareholders 2.5.1. Mike Sessions – Chairman Mike holds a MA from Cambridge and has extensive experience in value engineering and

lean manufacture in the valve industry. He was the founding partner of Mitech, which was sold to the international company Spirax Sarco in 2004. Mike and Richard are the founding partners of eDART.

2.5.2. Richard Rule – Director

Richard qualified in Instrumentation and Control with distinction. He joined Outokumpu in 1997 as an instrumentation and control engineer. Before Richard joined eDART, he managed a Process Solutions business section where complete solutions to the industry

were offered. Richard is responsible for new business development.

2.5.3. Mike Walker – Sales Mike Walker graduated from WITS with a B.Sc (hons)(Building Science) in 2004. He is now

responsible for international sales.

2.5.4. Chris Sessions – Sales

Chris holds a B.Com (hons) degree. He is responsible for local and regional sales and for the sales processing department.

2.5.5. Nicholas Sessions – Engineer Nicholas received a first class B.Sc and M.Sc (eng) (mech) from the University of Cape

Town. He is responsible for: CFD analysis, Marketing, and Production Planning.

2.5.6. Oliver Sessions – Engineer Oliver completed his B.Sc (first class) in mechatronics engineering at UCT. He is

responsible for eDART systems and product design.

2.5.7. Pierre — Engineer

Pierre received his B.Sc (eng)(mech) from UCT in 2003 and has specialised in production systems since. He joined eDART and is now manages the production department.

eDART Portfolio


3. eDART’s Current Product Range 3.1. Single eDart Valve

The valve is optimised for fine control of slurry flow from one flotation

machine to the next. The single eDart has a customisable body and flange

orientations to suit any plant.

Features

Body fully customised to plant layout.

Anti-burping bonnet to help avert air build up within the body.

Simple maintenance: All internal wearing parts can be inspected

and/or replaced without removing the valve body from the process

line.

Anti-Rotation Device on the plug.

Stroke Indication.

Applications

Due to the valves flexible orientation, it is ideal for plant retrofits.

Flotation level control.

Distribution box level control.

3.2. Dual eDart Valve

The Dual eDart – or external (to a vessel) dual Dart valve – has been

specifically designed with the flotation market in mind. It has been

optimised for slurry flow by having two plugs and seats within the body

giving this valve a high rangeability and fine control. Because the valve is

external to the vessel it is well suited to upgrade projects and where safety

is a concern, the valve, in conjunction with knife gate valves, may be

isolated and easily maintained.

Features

Body fully customised to plant layout.

Either front or side outlet (or both).

Cage guided plug on 250mm and larger.

Inspection hatch / sampler port.

Anti-burping bonnet to help avert air build up within the body.

Simple maintenance: All internal wearing parts can be inspected

and/or replaced without removing the valve body from the process

line.

Anti-Rotation Device on the plug.

Stroke Indication.

Applications

Flotation machine level control.

Distribution box level control.

eDART Portfolio


3.3. iDart and TriDart Valves

eDART’s internal dart valves are bodiless valves suitable for

installation within the slurry tank, cell or box. There are two main

variations – self-contained triDart valves which are factory

calibrated and installed as a single unit; and iDart valves which

have a bolt down seat cage with only a shaft extending to the

actuation unit. Both types offer the stability and reliability

advantages of head-guiding where the plug is guided into the seat

with bars set out all around the plug.

Features

Modulating Control or On/Off applications.

Fully customisable design.

Anti-Rotation device on the plug.

Stroke indication.

Applications

Large flotation machines.

Deep distribution boxes (includes integral head guiding).

Splitter boxes.

Distribution boxes.

Conditioner tanks.

3.4. yDart Valve

Not all valves are located within or attached to a vessel. There are

instances when the valve is required in a pipeline, and where often a pinch

valve will suffice; there are times when the advantage offered by a dart

valve is needed. These inline dart valves have been specifically developed

to satisfy this need. The yDart, and its variations, have the same

polyurethane plug and seat as its standard i-, tri-, single-, and dual-Dart

configurations offering the same high level of slurry flow control.

Features

Compact design.

Fine control.

Linear characteristic.

Flow-Over the plug (important to reduce wear).

Bellows sealing arrangement on shaft

Removable bonnet for easy maintenance; valve body remains in the

process line.

Anti-Rotation Device on the shaft to prevent plug turning.

Stroke Indication.

Applications

Flotation Machine level control.

Inline slurry control valve.

eDART Portfolio


3.5. Standard Pinch Valves

eDART’s control pinch valves are supplied with reduced or full bore pinch

sleeve with a single pneumatic actuator. These valves are value

engineered to give a simple, robust and low cost valve with flow control

capabilities.

Features

Standard Pinch Valve pinches from both the top and the bottom of

the sleeve

Applications

Coarse abrasive slurries

Slurry flow control

Fast flotation machines

Column cells

3.6. Flash Pinch Valves

These valves are our premier control pinch valves with two rigidly mounted

actuators and reduced bore sleeve used in high wear applications where

control is required.

Features

Reduced bore sleeve for better control

The pinched slit of the double actuator pinch valve is orientated

vertically so that the solids in suspension do not have to ride up

over the rubber “weir” in the pinched sleeve

Both actuators of the double actuator pinch valves are rigidly

attached to the frame that is bolted to the pipeline providing a more

stable valve

Applications

Coarse abrasive slurries

Slurry flow control

Fast flotation machines

eDART Portfolio


3.7. Actuators

eDART Actuators’ unique design eliminates the use of tie-bars which

reduce the size and weight of the actuator. The biased spring options

allow for fail action but are piped Double Acting for superior control.. They

are specifically designed to be used on modulating control applications.

Features

Double piston seal and PTFE wear strip for reliably long service and

reduced wear

Variety of stroke lengths available

Compact and robust design

Self-contained spring pack – welded pre-compressed safe design

Anti-rotation device

Stroke indicator

Applications

Pinch Valves

Dart Valves

Diaphragm Valves

Knife gate Valves

Y-pattern Valves

eDART valves

Dosing valves

Sluice gate control

Third party valves

3.8. Poppet Samplers; Thief Samplers; Long Stroke Cross Sectional Samplers

eDART offers various samplers of very simple and compact design, highly

robust and inexpensive for a number of sampling conditions. These

samplers have been successfully used sampling of slurries for many years.

Features

Eliminates product spillage

Compact design

Line pressure not exposed to atmosphere

Water flushing if required

Low and easy maintenance

Moving parts fully removed from the line in the non-sampling

position to extend the sampler life

Simple and robust

Applications

Composite sampling

Daily shift or shift sampler needs composite sample

Grab samplers Sampling campaigns

eDART Portfolio


3.9. Dosing Valves

A Self Flushing Inline 3–Way Dosing Valve furthers eDART’s extensive

range of Slurry related products. This valve is used to neutralise tailings or

to control the PH of the medium.

Typically, rock lime (alkaline) in a ring main is continuously pumped

around the circuit because it tends to settle and separate. Normally a T

piece is inserted into the line (called a take off line) and the flow is

controlled with a standard valve i.e. knife or butterfly. When the valve is

closed the line is filled up with the stagnant lime and blocks. The dosing

valve eliminates this by being located directly in the ring main. As the

valve opens the vertical take-off line fills up. When closed the line gravity

flushes thus not leaving a pocket of pipe that can solidify.

Features

Self Flushing

Applications

Lime dosing lines slaking

Reagent dosing.

3.10. Dual Valve Controller

The eDART Dual Valve Controller (DVC) is used to control two valves which

act in parallel with a single 4-20mA signal from the control room.

Typically, this could be two parallel internal dart valves or the external

Dual eDart.

Features

The characteristic of the two valves and the desired characteristic of

the combined unit can be programmed

The Master and Slave output can be reversed periodically if the

application requires this to prevent sanding

The time between reversals and the time to complete a reversal is

programmable to prevent any surges to the plant

The DVC will produce a calibration certificate, including serial

number, and date for each calibration

One DVC can drive another DVC to control a third valve if required

The control algorithm is designed to prevent one valve operating

close to the seat whilst the other valve is fully open

The DVC requires a 24 VDC power source

Applications

eDART Dual eDarts

any number of valves acting in parallel

eDART Portfolio


3.11. eDART Gas Flow Dampers and Large Rotary Actuators

eDART’s dampers are custom built to the application. The damper shown

here is rectangular of the louver type. Flow analysis using Computational

Fluid Dynamics software was done in house to determine flow

characteristics and to assist in the actuator design.

These dampers are also provided with eDART’s custom large rotary

actuator which is suitable for torque range up to 350kNm (A large African

Elephant on the end of a 6 ½ metre beam).

3.12. eDART Back Pressure Pipe

Back Pressure Pipes are situated on the final cell discharge of a flotation

bank. The pressure drop across the valve is commonly exaggerated due to

the downstream pipework arrangement. To improved performance of the

final cell and to reduce the pressure drop across the final valve, a back

pressure pipe is used to decouple the downstream pipework from the cell.

This not only assists the performance of the valve, but will also recover

half the height of the cell across the entire bank. For commonality of

spares, the valve can now be identical to the intermediate valves

upstream. eDART uses a CFD package called FloEFD to assist in the

design.

3.13. eDART Splitter / Distribution Boxes

eDART uses FloEFD to model inlets and outlets of distribution and splitter

boxes to optimise the design and get good mixing and even flow from the

outlets. Good box design will often have a dropbox in the inlet chamber to

cushion the inlet flow if fed from the top, an underflow weir to the boiling

chamber and an overflow weir which can be split easily to achieve the

desired output.

eDART Portfolio


3.14. eDART Positioners

eDART Positioners have been carefully chosen to give the best

performance and designed to specific specifications important in

the operation of a slurry valve. eDART specifically recommends

the Siemens PS2 and Power Genex SER models.

3.15. eDART Globe Control Valves and Knife Gate Valves

eDART Globe Control Valves have been developed for

the aeration of flotation tanks. These valves benefit from

the standard eDART mounting of a high quality actuator

with full anti-rotation, linear feedback and stroke indication.

eDART Knife Gate Valves have been developed for the

isolation applications. Carbon Steel bodies with eDART

actuators are standard but full 316 Stainless Steel valves

with Viton seals and modular air receivers extend the range

(see image on the left).

3.16. eDART actuated Butterfly and Ball Valves

eDART actuated Butterfly and Ball Valves are available

for process automation.

3.17. eDART Accessories

eDART offers numerous accessories including:

Proximity

Swtiches

Solenoids Air Filters Volume

Boosters

Quick

Exhausts

Air Pressure

Regulator

eDART Portfolio


4. Products in Development eDART has internal skills abilities to rapidly design and develop new niche products in

response to the market requirement. An example of this was the DVC, or Dual valve controller, that was designed and developed within three months to meet a customer

requirement. We have a number of new products that are soon to be launched. – Please contact Richard

Rule (+27(0)11.463.9345 or [email protected]) for more information.

5. Innovation eDART has a strong belief in continued education and training and encourages all staff to

develop their skills and interests. eDART believes that a high level of innovation is fostered within the company for this reason.

eDART is particularly proud of the use of laser cutting for both plates and tubes in the designs and they are committed to using jigs and fixtures which are designed at the same

time as the product. eDART also enjoys 3D-Printing complex models in a rapid prototyping procedure early in our design process.

6. Research and Development eDART has the abilities and skills within the company to rapidly design and manufacture

new products. These skills extend to mechanical, electrical, hydraulic, instrumentation, control and software fields.

eDART Portfolio


7. Other services eDART offers eDART offers products for the slurry industry and is constantly developing new products to

add to that range. However, additional services based on available tools and extensive expertise, other services are offered.

These include:

Application Design Services

eDART recommends the ideal valve for each application.

FloEFD A Computational Fluid Dynamics package to examine the flow

detail.

SolidWorks A full 3 dimensional CAD package – includes general design and detailed machine drawings.

“Working With – ”

Courses

eDART administers three courses called “Working with Valves for

SAVAMA”, “Working with Control Valves” and “working with Slurry Valves”. These courses are very applicable and necessary for any person who comes into contact with valves.

eDART Portfolio


8. Portfolio of work Following is a selection of previous and current projects.

Project Product Supplied

Kemess, Canada Dual eDart 300mm (370mm)

Fresnillo, South

America

Dual eDart 250mm

Marikana, South

Africa

Single eDart 100mm

Bindura, Zimbabwe Single eDart 250mm

Pogo, Alaska Single eDart 350mm

Nkomati, South Africa

Dual eDart 300mm

Smokey Hills, South Africa

Actuators

Blue Ridge, South

Africa

Actuators

Rustenburg Platinum, Anglo Platinum

Dual eDart 100 & 150mm

Rosh Pinah, Namibia Single eDart and

triDarts

Bogoso, Ghana Dual eDart 250mm

Lebowa Platinum

Mines , Anglo Platinum

Dual eDart 200mm,

DVC

Tati Nickel,

Botswana

Dual eDart 350 mm,

Dual 150 mm

Bindura Nickel,

Zimbabwe

Dual eDart 200mm,

Dual 150 mm

Inco Thompson, Manitoba Canada

single eDart 350mm, 400 mm

Koncola Copper mines, Zambia

triDarts 250mm

Vhumbabani –

Amandelbult, Anglo Platinum

eDarts 200mm, DVC

Bafokeng Rasimone

Platinum mines ( Anglo platinum/RBH)

Single eDarts

400mm yDarts 250 & 200mm

Project Product Supplied

Waterval Concentrator ,

Angloplatinum

Actuators

Namzinc, Namibia Dosing Valve

Spirax Sarco y-Darts 200 &

150mm

Tati Nickel, Botswana

Dual eDarts 300mm

Two Rivers, South Africa

Dual eDarts 300mm, single

edart 150mm

Outotec - Amandelbult

Platinum mine

10 off ED300 AA

Platinum Mile retrofit

10 X iD450

DRA , Aquarius Marikana rougher

Retrofit

16 off ED300 BA

Tati Nickel retrofit 4 x ED350AA, 4 x ED300AA

Outotec – Buffelsfontein

30 x ESA 300-450 DA including

pedistals

Senet – Tongon Tridarts

2 x TD400,4 x TD600

Areva/Concor – Trekkopies

150 x TD400

Golden Starr –

Bogoso

2 X ED400 BA, 1 x

ED350 AA

Norilsk Nickel/ARM

Nkomati Phase 2 b

2 ED 200 AA

Outotec Canada – Mexico

4 x ED100B

FQML – Kanshanshi 1 ED150A, 1 X

YD200B, TS125.

Senet – Mumi Dosing valves,

(Various)

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