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Dual Valves Australasia Pty Ltd
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Hydrocore’s mine water pressure reducing valves offer reduced downtime

The Hydrocore™ range of mine water pressure reducing valves offered by Dual Valves Australasia* feature a single moving part that is easily accessible for maintenance with the valve in the installed position. The valves are designed to handle a maximum inlet pressure of 250 bar (25 MPa) and are ideal for pressure reduction in underground mining applications.

“Hydrocore™ pressure reducing valves are designed to offer greatly reduced maintenance downtime, minimal operating costs and maximum system flexibility, and the simple design makes troubleshooting and repairs significantly easier compared with competing products” says Dual Valves’ Justin Mirto. He explains that, by removing the valve’s end covers and extracting the shuttle, the seals can be replaced and the shuttle refitted to resume operations in a very short time. “No need to remove the valve out of the pipe line. No pressure reducing pilot valves, needle valves, isolating cock valves, dismantling of pilot lines, springs and diaphragms to deal with. It’s so easy - simply remove one end cover, remove one moving part, replace the seals and reinstall - and the system is back up and running again in a few minutes”.

As with all their product range, Hydrocore™ applied their experience and understanding to design their pressure reducing valves specifically for underground mine water applications. The tamper proof design and reliable performance ensures that end-users can enjoy trouble-free operation for many years. All Hydrocore™ valves are designed with this simple but effective philosophy, and their range includes valves for isolation and control application, including pressure reduction, pump discharge control, column drain and water-hammer prevention up to a maximum of 250 bar CWP.

*Note: Hydrocore™ products are available to Dual Valves Australasia through our relationship with our Principal - Hydromine Projects of South Africa, who has sole representation.
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11/19/15
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Slimline valve – ball check valve with integral seat
Dual Slimline Ball Non Return valve (DSFFV)
PRODUCT FEATURES
...
The DSFFV’s heart is a reinforced urethane ball. The unique design allows free movement of the ball, which lifts completely out of the liquid without any interference. As the pump stops, the heavy ball falls into the seat resulting in dropless sealing
TECHNICAL FEATURES
•SIZE (mm): 80 to 600. Different sizes available on request
•OPERATING PRESSURE: 0 to 100 bar
BENEFITS
•Prevents clogging by means of the self cleaning ball
•Silent, non-slam and reduces pipe hammer
•Simple construction with only one moving component
APPLICATIONS
•Mining and mineral processing
•Power generation
•Sand and gravel
•Chemical and soda ash
•Pulp and paper
•Environmental and Effluent
http://www.dualvalves.com.au/PDF/DSFFV.pdf
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Air valve – air valve and vacuum breaker
DUAL Slurry Air Release valve (DSARV)
PRODUCT FEATURES
...
The DSARV ‘s function is to automatically exhaust large volumes of air from the system when it is being filled and also to allow air to re enter the pipeline when being emptied. The orifice size is generally the same size as the valve inlet and outlet.
TECHNICAL FEATURES
•SIZE (mm): 50 to 200
•OPERATING PRESSURE: 0 to 100 bar
BENEFITS
•Self cleaning ball action with no blocking due to ball rotation
•Linatex secondary seal for a positive seal
APPLICATIONS
•Slurry pipelines
•Deep well pumping
•Waterlines
•Sewage
•High pressure pipelines
•Pipelines with scale
Download our brochure now -
http://www.dualvalves.com.au/PDF/DSARV%20AUST%20brochure.pdf
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Dual Valves Australasia offers Hydrocore™ U-Cone Pipe Couplings – designed for specifically for high pressure mining pipelines
 
The Hydrocore™ U-Cone coupling offers mine engineers a simple and economical alternative to traditional flanges for use on high pressure pipe systems.
 
Pipes are joined simply by bringing the ends of the pipe with welded hubs together after inserting the seal, fitting the clamp set over the adjoining hubs and tightening the clamp bolts.
The external tapers on the hubs provide alignment while the clamp set pulls the hubs together, forming a simple but effective seal which comparable to similar rated conventional flange systems.
Assembly and stripping times are faster than conventional flanges - the number of bolts to be tightened on U-Cone pipe couplings is far less than the number of bolts on a standard comparable flange system – eg: a U-Cone DN100 250 Bar (25Mpa) rated coupling uses 2 bolts – whereas a similar rated flange (ANSI/ASME B16.5 Class 1500#) would use 8 bolts.
Storage/transportation costs are lower due to smaller footprint occupied by pipes with welded hubs compared to pipes with welded flanges. Flange diameters are larger than hub diameters.
Hubs can be supplied full bore, with metallurgy to ensure weld compatibility with the pipe used, and are supplied prepared for standard butt welding to all pipes.
 
Features and specifications:
Clamps are cast steel BS3100 Gr. 2 or equivalent as standard, with optional coatings available.
Hubs are St52 as standard, with other alloys available upon request for weld compatibility with the pipe system used.
Bolts used are Gr.8.8 or higher, electro-galvanized as standard.
Designed and tested per ASME B31.3 and ANSI/ASME VIII.
Available in various sizes with standard pressure ratings from 64 Bar up to 250 Bar (25Mpa):
100 Bar (10MPA) rated: DN50 to DN500
160 Bar (16Mpa) rated: DN50 to DN400
250 Bar (25Mpa) rated: DN50 to DN300.
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eDART COARSE POPPET SAMPLER
The coarse sampler has been specifically designed to sample coarse slurries, typically cyclone feed lines. This sampler can sample particles up to 15 mm in diameter. This sampler features a tungsten carbide piston plate and a polyurethane sampling chamber for increased wear resistance. The samplers are used for calibration of densitometers and control purposes. In the retracted position the sampler is fully removed from the process stream to extend life expectancy.
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DUAL Slurry Air Release valve (DSARV)
PRODUCT FEATURES
The DSARV ‘s function is to automatically exhaust large volumes of air from the system when it is being filled and also to allow air to re enter the pipeline when being emptied. The orifice size is generally the same size as the valve inlet and outlet.
TECHNICAL FEATURES
SIZE (mm): 50 to 200
OPERATING PRESSURE: 0 to 100 bar
BENEFITS
Self cleaning ball action with no blocking due to ball rotation
Linatex secondary seal for a positive seal
APPLICATIONS
Slurry pipelines
Deep well pumping
Waterlines
Sewage
High pressure pipelines  
Pipelines with scale
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TriDarts
 
eDart is proud to present a self contained internal dart valve which just can be dropped into your installation, bolted down and has the distinct advantage of being pre assembled and calibrated prior to shipment to site. Recommended for tank depth of up to 2-metres, if tank is deeper then an iDart valve will be recommended.
Material of Construction
Mild Steel bodywork 
Poly urethane and mounting bars 
Internal components made from wear resistant poly urethane (PU) protected, wetted parts including seat,plug and valve guides 
Shaft either stainless steel or PU protected
Standard Sizes
100mm to 400mm 
eDart offers customisation to suit your needs and plant layout if required.
Options
Supplied with or without an actuator 
Bias Spring Fail Closed, Fail Fixed or Double Acting
Actuator Options
Smart (HART, Profibus), Electro-Pneumatic (4-20mA), Pneumatic (20-100kPa) Positioner 
Please ask for modifications to suit your needs and plant layout
Features
Self contained, “drop in“ style 
Control or On/Off applications 
Customisable design 
Full head guiding 
Anti-Rotation Device 
Stroke Indication
Applications
Ideal for tanks up to 2-meters deep Smart splitter boxes Feed distribution boxes Small flotation machines Conditioner tanks
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yDarts:

eDart offers an in-line slurry control valve with compact design and fine control due to the use of a plug and seat. The plug shape has been verified using advanced Computational Fluid Dynamics (CFD) software.
Material of Construction
Mild steel body (rubber lined and painted)
Rubber lining – natural rubber
Two coat carboline epoxy painted body as standard
StSt valve shaft and positioner mounting
Polyurethane or UHMWPE plug
Linhard or polyurethane seat
Standard Sizes
100mm to 500mm
Options
Various flange and drilling options
Reduced or full bore options
Tungsten-Carbide option on valve shaft
Smart (HART, Profibus), Electro-Pneumatic (4-20mA), Pneumatic (20-100kPa) Positioner
Bias Spring Fail Closed, Fail Fixed or Double Acting Actuator Options
Features
Compact design
Fine control
Linear characteristic
Flow-Over the plug (important to reduce wear)
Bellows sealing arrangement on shaft
Piston pneumatic actuator with double O-Ring seal
Removable bonnet for easy maintenance; valve body remains in the process line
Anti-Rotation Device
Stroke Indication
Applications
Flotation Machine level control
In line slurry control valve
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DVA’s High Pressure Knife Gate Valve sleeves replace OEM sleeves after extensive site trials.

In another win for DUAL Valves Australasia, a West Australian alumina refinery has recently replaced a number of their 21 Bar rated OEM push-through style knife gate valve sleeves with sleeves from DUAL’s High Pressure knife gate valves - after reporting a tenfold increase in lifespan to date when using our DUAL DHPSKG sleeves in comprehensive site trials.
 
“We were advised that their 21 Bar rated OEM knife gate valves were consistently failing after only four weeks in operation in the worst reported applications. A decision was taken by the refinery team to extensively trial a number of their knife gate valves retro-fitted with DUAL’s DHPSKG sleeves after we confirmed their suitability and dimensional fit” explained Justin Mirto of Dual Valves Australasia (DVA).
 
“An initial set of four valves was retro-fitted with our DHPSKG sleeves, and these were installed in selected worst performing areas where the OEM sleeves were consistently failing after only four weeks in operation.  At the time of writing this article, reports from the end user indicate the trial valves had been performing well for over 12 months.”
 
Encouraged by performance of the sleeves, the refinery embarked on a program to refurbish all the OEM valves with DUAL DHPSKG sleeves as and when they fail - in an ongoing exercise that has resulted in the refinery enjoying a new-found luxury:  a reliable stock of rebuilt valves sitting in their stores awaiting deployment – something that they had not achieved in years with the OEM.   
 
“All the clichés apply - ownership costs are down, downtime has been slashed - and maintenance crew morale is up. It’s been extremely satisfying to see these results unfold and recognised by end-users. DUAL’s long standing philosophy of offering customers high performance with excellent value have certainly paid off for this client” explained Justin Mirto. “We expect to see more end-users challenge the reliability and performance of their existing OEM push-through style high pressure knife gate valves as more reports like this gradually filter through the industry”
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2014-09-08
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