STAINLESS STEEL
We are manufacturing engineers, working with all materials – Stainless Steel, however, is our speciality.
​
Our fully-equipped workshop has CAD design, CNC machining, TIG welding shops, sheet metal fabrication with press facilities and a fully equipped mechanical and electropolishing metal finishing shop.
​
We can handle any size or quantity of job, from initial concept development, through design (via Computer Assisted Design) to initial prototyping, manufacturing of “one-off” products or large production runs.
​
In addition to our production shop, we offer a repair and modification facility: if your existing laboratory, cooking or other food-grade equipment isn’t performing, come in and discuss your requirements.
​
Our toolmaking service focuses on press and punch dies, manufacturing both “from scratch” and offering die retooling and refurbishment.
​
We are an outsourcing and outwork supplier to a variety of new Zealand businesses: our OEM production and finishing services include:
​
-
Design-on-behalf
-
Contract Machining (CNC turning, milling and programming all carried out in-house)
-
Electro polishing – of parts made in our workshop or yours
-
Press and Punching (all materials but with significant expertise in Stainless steels and Aluminium)
-
Sheetmetal Fabrication
-
Polishing: both mechanical polishing and/or in conjunction with electro-polishing
​​
We are keen to discuss your project, whether large or small, design-from-sketch or “just” manufacturing – or something else. The initial consultation will be at no charge and will be kept completely confidential.
​
Need more information on our capabilities? Please see our FAQ (Frequently Asked Questions) or contact us.
​
​
Ph: 07 849 3108
WATER FLOW INDICATORS
Se-Tech Water Flow Indicators are used primarily in the horticultural, farming and industrial sectors. They show water flow (and can be used for most fluids) in buried or closed pipelines, above or below ground. In the rural sector, Water Flow Indicators are primarily used as a quick and simple way of finding water leaks.
​
The Water Flow Indicator (WFI) is designed as an infrastructure item, and is inserted inline with a pipeline-an indicator wand is mounted to the exterior of the WFI.
​
In farming or horticultural sectors the wand will be above ground.
In industry, shorter wands are generally used (custom wand lengths down to 150mm long are available at no additional cost).
​
When water flows through the pipe, a reflective fluorescent indicator becomes visible. The more flow through the pipe, the more indication – making identification simple of where water is flowing, in what direction and at approximately how much flow.
​
In farming, if there are no animals at the end of a pipeline spur, there should be no water being consumed. If there is water flow in that pipeline spur, chances are there’s a leak.
HOW IT WORKS
When water flows, an aerofoil lifts inside the flow indicator.
​
This has a magnet on it, which repels a magnet on the outside of the indicator.
This opposed magnet is part of the wand – as it changes height, an indicator at the other end of the wand (above ground in farm installations) shows the quantity of flow through the pipe.
​
The use of magnets allows a completely sealed indicator unit: there are no glands or seals, so the WFI is leak proof.
​
Having a Stainless Steel body, the WFI is rated for any pressure the pipeline it is inserted into can handle. In practice, it has been tested to and runs at 300 PSI without problem.
​
Se-Tech Water Flow Indicators are available in 32mm (1-¼ ” BSP) and 50 mm (2″ BSP) pipeline sizes.
​
The 32mm version can be fitted to smaller pipeline sizes: although it will show flow down to “garden hose” size, the bottom limit for accurate indication is around ¾” BSP pipe or hose.
INDICATOR SHOWING FLOW AND NO-FLOW STATES
WAND LENGTH
The standard wand is 1.13 metres high.
​
Custom shorter wand lengths can be supplied upon request and at no additional charge: please enquire should you have a need for these.
​
No good idea should be published without protection – as a consequence, Se-Tech Water Flow Indicators are protected under Patent No. 532692.
​
As with all Se-Tech products, Singh’s Engineering Services proudly designs and manufactures the Water Flow Indicators in Hamilton, New Zealand.