What is a constant flow valve ?
Constant flow valves generally control the flow of a fluid, in a pipe. These may be adjustable, or non adjustable.
Some types may also be pressure compensating i.e. maintain a constant flow, regardless of pressure.
What the Maric Flow Control valve does
The Maric flow control valve is designed to deliver your required flow rate, irrespective of pressure differential*, over a wide range**.
The minimum differential required to achieve rated flow for a Precision Maric valve is 140 kPa.
*Pressure differential is difference between the inlet and outlet pressure
**Pressure differential range for Precision type Maric valves is 140 – 1000 kPa
Why use Maric Valves?
Valuable protection for flow rate sensitive pumps, filters, pump glands, and water distribution systems
The valves boast automatic, maintenance free, and self cleaning operation
The valves useful life can be up to 20 years
They are compact and are available in the broadest range of connection types, sizes and material types in the world
Note: Maric valves are not designed to control pressure.
Please view our detailed PDF information:
- Valve Selection Guide
- Operating Instructions
- Understanding Headloss
- Glandwater Manual
Complete range of screwed, wafer, and insert type valves:
How the Maric valves work
The Maric valves utilise a flexible rubber control ring, with an orifice diameter that responds instantly to fluctuations in water pressure
As pressure differential increases, the orifice diameter reduces to maintain the pre-set flow rate
Likewise, as pressure reduces, the orifice opens up to maintain the pre-set flow rate
These valves are particularly suitable for use on poor water quality, because the flow controlling element is a rubber material, and flexes under normal operation. This minimises the risk of blockage, and eliminates the build-up of scale.
Quality Assurance – The Company
The Company has a recognised and regularly externally audited Quality Assurance System which ensures a consistent and high level of quality. Our quality assurance system is SAI Globals “Product Compliance Program”, PCP14.02 WaterMark level 1. This system is based on ISO9001.
WaterMark Quality Certification – The Products
The Products must also comply with the specifications of the appropriate Australian Standard. The standard for Maric Flow Control valves is: Australian Technical Standard; ATS5200.037.1-2006-FLOW CONTROLLERS. This specification includes, but is not limited to: Design; AS3688, Materials; AS1567, AS2345, Potable water suitability AS4020, End connections; AS ISO 7.1, AS1722.2, AS4087 & AS2129, Hydrostatic pressure test & water-tightness; AS3718, Flow rate; AS1357.2, Marking & Product documentation.