BT-Maric threaded constant flow valves are designed to deliver a constant, pre-set nominal flow rate for water and similar media—regardless of pressure fluctuations. Their mechanical design ensures reliable and accurate flow control without the need for external power or regulation systems.
BT-Maric constant flow valves are available for pipe sizes ranging from 1/8″ to 2″ and can regulate flow rates from as low as 0.15 L/min up to 342 L/min. They are suitable for water and similar media, and ensure consistent performance regardless of pressure variations.
BT-Maric threaded valves offer a simple, compact and highly reliable solution. With no moving parts and a maintenance-free design, they are built to last—providing up to 20 years of service life.
Our standard control rubber type, PRECISION, ensures a high level of accuracy—maintaining flow within ±10% of the nominal rate.
The PRECISION valve is designed to operate within a pressure drop range of 1.4 to 10 bar.
Other control rubber types are available for alternative pressure ranges, depending on your application needs.
0,15 – 342 L/min depending on valve size.
+/- 10% within the pressure drop range of 1,4 – 10 bar.
Typical performance of BT-Maric constant flow valves >>
≤ 60°C
Operating Temperatures: up to 200°C (depending on the control rubber type and material of the housing).
Connection size from 1/8″ up to 2″: 1/8″, ¼″, 3/8″, ½″, ¾″, 1″, 1¼″, 1½″, 2″ (Standard ISO 228/1 BSP).
NPT threads are available in F/F 1/8″, ¼″, 3/8″, ½″, ¾″, 1″, 1¼″, 1½″, 2″ in Stainless Steel only.
Feamale/Feamale.
Male/Female, Female/Male, Male/Male are also available depending on the size of the valve and material of valve body.
Brass, U-PVC and Stainless Steel.
Examples: POM, PVD-F, Titanium, Duplex, PE …
Our team of experts is ready to help you find the best solution and ensure that you have all the details necessary to make informed decisions. Contact us today!
Threaded constant flow valves support flow rates from as low as 0.15 L/min up to 342 L/min, offering a flexible and economical solution for water and similar media across a wide variety of applications.
Engineered for stability, these valves respond immediately to pressure changes, maintaining a consistent flow rate. This makes them ideal for systems where steady flow is critical, even under variable operating conditions.
Equipped with precision-moulded rubber control elements, the valves deliver flow accuracy within ±10% of the nominal rate. This makes them well-suited for applications requiring reliable and exact flow performance.
These valves operate entirely without external power or actuation. Their mechanical design ensures simplicity, reliability, and independence from electrical systems.
With no moving or wearing parts, threaded valves offer high reliability, straightforward installation, and long-term cost savings through maintenance-free operation.
Constructed with durability in mind, they perform reliably in demanding industrial environments, where robustness and long service life are essential.
Thanks to their compact form, threaded valves are particularly suitable for retrofitting into existing systems where space is limited. Compared to traditional diaphragm valves, they offer a streamlined solution without compromising performance.
The valve’s design minimizes the risk of clogging and eliminates the need for routine maintenance, ensuring continuous, hassle-free operation over extended periods.
Made from safe, non-toxic materials, these valves are ideal for use in potable water systems and environments with strict sanitary requirements.
Designed for durability, the valves offer a lifespan of up to 20 years, significantly reducing the need for replacements and lowering long-term operating costs.
The use of flexible rubber control elements helps prevent blockages and scale formation, making these valves especially effective in systems with poor or variable water quality.
The flow rate is pre-set and cannot be altered, intentionally or accidentally—ensuring secure, consistent operation throughout the valve’s lifespan.
Suitable for systems operating between 0.45 and 20 bar, these valves provide flexibility across a broad range of applications and system requirements.
Available in standard materials such as UPVC, brass, and stainless steel, with optional alternatives including POM, PVDF, titanium, duplex, and PE, allowing compatibility with various fluids and environmental conditions.
For unique applications or project-specific demands, custom-built valves and inserts can be provided to meet exact technical requirements.
BT-Maric constant flow valves utilize a flexible rubber control O-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.
The ring has a larger opening at low pressure.
At high pressure the ring is pressed against the conical body. The ring’s opening reduces and the flow remains constant.
Follow these steps to specify the valve that best suits your system:
Learn more about each key step from our specification guide.
We understand that selecting the right valve can be crucial to your project’s success.
Please consult our guide for help to specify your standard connections step by step
Since each application is unique, we’re here to provide personalized assistance and detailed information tailored to your needs.
For specifications, pricing, availability, or any other questions, please don’t hesitate to reach out.
Valves must be installed the right way around. A direction of flow arrow is stamped on the valve body.
Instructions
