Constant flow valve type Inserts
How does our constant flow valve type Inserts work?
BT-Maric constant flow valve type inserts utilizes a flexible rubber control O-ring with an orifice diameter that re-sponds instantly to pressure variations (within a given range).
When the pressure increases the O-ring is pressed down into the conical seat and the orifice of the O-ring decreases in size so that the water flow remains constant at the pre-set nominal rate, and vice-versa.
In this way the pre-set nominal flow rate is always kept constant regardless of the pressure variations.
BT-Maric constant flow valve: type Inserts
BT-Maric Insert valves provide a constant, pre-determined, flow rate for water and similar media regardless of the pressure variations. BT-Maric Inserts are designed to be fitted inside existing pipe work or pressing/slip fitting inside other equipments such as manifolds water meters and meter tails etc. They control flow rates up to 233 L/min. Insert valves are the most economical products in our constant flow range.
Two types of inserts are available: plain and special inserts.
- Plain inserts are available for pipe sizes between DN8 to DN40.
- Special inserts are made to suit customer’s specific requirements for their OEM equipment. They can be fitted with an O-ring, for the purpose of sealing and holding the insert in place.
Unique Features :
- Wide range of flow rates available for water and other media from as low as 0,15 L/min to 233 L/min.
- Simple, compact, reliable and characterized by a long life (up to 20 years).
- High accuracy of flow control: With our standard control rubber types PRECISION, we achieve an accuracy level of +/- 10% of the nominal flow rate. PRECISION covers the pressure drop range of 1,4 – 10 bar. (Other pressure drop ranges are available).
- Available in sizes from 1-5.
Click to view all features
• Solutions available from 0,4 up to 20 bar.
• Wide variety of materials available: brass, stainless steel, U-PVC, POM, PVD-F, Titani-um, Duplex, PE …
• 100% mechanical solution: no additional power source needed.
• Maintenance free: no need for spare parts. Due to the valves unique design and lack of wearing components spare parts are not available.
• The constant flow valves are primarily for water applications and 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 conditions. This greatly minimizes the risk of blockage and eliminates the build-up of scale.
• Pre-set flow rate to avoid adjustment errors or unwanted system changes.
• Customized solutions are available.
Download Data Sheets :
Stainless steel, brass and PVC Insert Type valves
How to specify your constant flow valve
Read more about our complete range of threaded valves and wafer type valves.
Specifications for BT-Maric Insert Valve Type
Standard nominal flow rate 0,15 – 233 L/min depending on valve size.
See all available nominal flow rates
Standard flow rate accuracy: +/- 10% within the pressure drop range of 1,4 – 10 bar.
Standard operating pressure drop range: 1,4 – 10 bar
Solutions for other operating pressure drop ranges
Standard Operating Temperature:
≤ 60°C
Solutions for other operating temperatures
Operating Temperatures: up to 200°C (depending on the control rubber type and material of the housing).
Size from 1-5: SIZE 1 =Diameter 12,45mm; SIZE 2= Diameter 18,40mm; SIZE 3=Diameter 26,70mm; SIZE 4=Diameter 37,85mm; SIZE 5=Diameter 50,40mm
Max Flow rate per Valve body size
Customized solution available depending on quantity.
Standard materials for valve body: Brass, U-PVC and Stainless Steel.
Other material options
Examples: POM, PVD-F, Titanium, Duplex, PE …
Do not hesitate to contact us for any queries. We will be more than happy to provide you with either a standard or customized solution.
