Angular Manual Isolating Value
The Hydrocore™ range of isolating valves can accommodate any form of isolation method without having to use external equipment such as pilots, pistons or gearboxes.
The concept of the Hydrocore™ isolating valve was developed from the tried and tested NGD™ isolating valve. For fourteen years the NGD™ isolating valve has been a simple and reliable solution for isolating line fluid in a piping system. But, due to the rising running costs, the valve needed a new and revised way of isolation. With the new Hydrocore™ design there is a substantial drop in the differential pressure due to the inclined bores. This in turn increases the valves flow coefficient and thereby reduces the running costs of the valve.
LOW TORQUE, LOW CLOSING FORCES
The Hydrocore™ manual isolating valve is hydrostatically balanced, requiring very low operating torque or operating forces at all valve positions and for all valve sizes and all pressure ratings.
No gearbox is required to assist in the valve's opening and closing for the handwheel operated valves. The valve derives its actuating power directly from the line fluid pressure.
The Hydrocore™ isolating valve is simple and reliable with a robust construction. Very little maintenance is required, it can be undertaken by semi-skilled personnel and with a short downtime period.
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The valve can be installed in any position.
ADVANTAGES OF THE HYDROCORE™ VALVE OVER BALL VALVES
Crippled gearboxes, cavitation from high differential pressures and longer lead times are three serious flaws of ball valves that the Hydrocore™ valves are spared from.
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Cost savings using a Hydrocore Isolating Valve are astronomical!
HYDROCORE ISOLATING VALVE (Left) | STANDARD ISOLATING GLOBE VALVE (Right)
VALVE FLOW CV
One of the primary costs after the initial capital outlay is running costs, especially in a pump station. A valve’s Cv determines the pressure drop between the inlet and outlet ports of the valve. The lower the pressure drop the higher the Cv, which in turn results in lower power consumption of the pump.
We have modelled a SIGV to determine its Cv (see figures above). The table below shows the power penalty cost of a Hydrocore Isolating Valve versus a SIGV.
As is evident, the cost savings using a Hydrocore Isolating Valve versus a SIGV are astronomical even within the first couple of years. Assuming that the price of electricity is not going to go down in the future, those cost savings will only increase.
Flow Coefficient (Cv) differnences
Hydrocore is 1086 versus SIGV of 360.
SIMPLICITY OF DESIGN
A complicated valve is a valve that invariably will have issues once the valve is commissioned. The simpler the design the better. This should also be taken into account when considering a Hydrocore Isolating Valve versus a standard globe valve.
MAINTENANCE AND SERVICING
The more moving parts in any valve design the more prone the valve will be to constant maintenance and servicing. This is even more of a concern in a mining setting where conditions are not optimal for smooth valve functioning. The Hydrocore Isolating Valve is simple to maintain and service compared with a SIGV.
This point is built on the previous two points. If a valve keeps on breaking down and requires constant servicing and maintenance, then the valve is no more an asset. In fact, it is now an obstacle to the smooth running of a mine. Inevitably, the valve gets replaced by another brand. The Hydrocore Isolating Valve, if maintained on a regular basis, will be keep on functioning indefinitely.