BT-Maric constant flow valve type Wafers

BT-Maric Wafers provide a constant, pre-determined, flow rate for water and similar media regardless of the pressure variations. Wafers are very compact and designed to fit between pipe flanges. They are available to suit a wide range of flange specifications. The standard Wafer is ISO PN10 but numerous specifications and standards are available including ANSI, DIN Standard etc. Wafers are the prefered choice for larger size valves and larger flow rates.

Wafers control flow rates up to 8.854 L/min

fitted between flange faces

BT-Maric Wafers are designed to be fitted between flange faces for pipe sizes between DN20 (3/4″) up to DN300 (12″). They control flow rates from 0,15 L/min to 8.854 L/min.

As standard, Wafers are manufactured according to ISO 7005 PN10. Other standards such as ISO PN16, American ANSI, Australian, Bristish standard BS, Japanese standard etc. are optional.

Easy to install

Simple, compact, reliable – and easy to install.

Wafers are the preferred choice for higher flow rates and larger pipe sizes.
Easy to install between the flange bolts.
Eassy to remove and refit by loosening all bolts and only remove one bolt completely to slip the wafer in and out.

Wafers – THE OBVIOUS CHOICE FOR larger size valves

Do you face any of the following challenges?

Do you need a constant flow in applications with high flow rates—up to DN300—regardless of pressure variations?
Do you require a constant flow rate in large-diameter pipeline applications where system pressure fluctuates?
Are you looking for a compact and cost-effective constant flow valve for your piping system or retrofitt project?
Do you want to optimize water usage in your existing pipe network?
Is water conservation a top priority for you?

BT-Maric Wafer-type Constant flow valves help you:

to achieve a mechanical, cost-effective, and compact solution for maintaining constant flow at high flow rates—regardless of pressure variations
to integrate easily into existing systems where space is limited
to ensure long-term reliability with a maintenance-free lifespan of up to 20 years
to deliver a consistent flow rate across multiple usage points
to prevent tampering by locking in the specified flow rate—avoiding both accidental and intentional changes
to protect downstream equipment by ensuring the exact flow rate at all times
to reduce water consumption and promote sustainable use

Specifications for BT-Maric standard Wafer Valve Types

Standard nominal flow rate:

0,15 – 8854 L/min.

See all available nominal flow rates

Standard flow rate accuracy:

+/- 10% within the pressure drop range of 1,4 – 10 bar.
Typical performance of BT-Maric constant flow valves >>

Standard operating pressure drop range:

1,4 – 10 bar

Solutions for low and high pressure drop ranges

Standard Operating Temperature:

≤ 60°C

Solutions for high operating temperatures

Operating Temperatures: up to 200°C (depending on the control rubber type and material of the housing).

Standard size:

DN20 (3/4″) up to DN 300 (12″) according to ISO 7005 (PN10).

Max flow rate per valve body size

Please contact us for customized wafers or wafers according to ISO 7005 (PN16) or other standards such as American Standard ANSI, DIN standard, British Standard BS, Japanese Standard JIS etc.

Standard materials for valve body:

Brass, Gunmetal, U-PVC and Stainless Steel.

Other material options

POM, PVD-F, Titanium, Duplex, PE …

We help you to find the best solution

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!

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Tailor made OEM

Why choose constant flow valves type wafers?

Explore the benefits of Wafer-type Constant flow valves

Wide range of flow rates
Our valves support water and other media with flow rates up to 8.854 L/min, making them suitable for a variety of applications.
Simple, compact and reliable
The design is robust and maintenance-free, with a service life of up to 20 years.
Easy installation
The valve is installed directly between flange bolts, with no need for special tools or modifications.
High flow accuracy
With our standard control rubber type, PRECISION, we achieve a flow accuracy of ±10% of the nominal flow rate. PRECISION is designed for pressure drops between 1.4 and 10 bar. Other pressure ranges are available upon request.
Multiple sizes available
We offer sizes from DN20 to DN300 to accommodate different system requirements.
Flexible pressure range
Solutions are available for operating pressures from 0.4 up to 20 bar.
Wide variety of materials
Our valves are available in several standard materials, including brass, stainless steel, gunmetal and U-PVC. Upon special requests POM, PVDF, titanium, duplex, and PE are also available.

Additional features of BT-Maric Wafer-type

100% mechanical solution
No additional power source needed.
Multiple standards available
Wafer valves are manufactured to ISO PN10 as standard, with options available in ISO PN16 and other international standards, including ANSI (American), BS (British), and JIS (Japanese) flange specifications.
Self-Cleaning, self regulating
The valve’s design minimizes the risk of clogging, eliminates the need for routine maintenance and no need for spare parts.
Maintenance free
No need for spare parts. Due to the valves unique design and lack of wearing components spare parts are not available.
Suitable for use on poor water quality
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.
Tamper-proof
Pre-set flow rate to avoid adjustment errors or unwanted system changes.
Customizable Solutions
For specialized requirements, customizable solutions are available, ensuring that these valves meet unique application needs.

This is how our constant flow valves type wafers work

This is how it works

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.

Watch our video:

A mechanical solution to achieve constant flow.

LOW PRESSURE

The ring has a larger opening at low pressure.

HIGH PRESSURE

At high pressure the ring is pressed against the conical body. The ring’s opening reduces and the flow remains constant.

How to specify your constant flow valve type wafers

Determine Your Valve – Step by Step

To help you select the right constant flow valve – type Wafer – for your application, follow these key steps:

Define your required flow rate
Select the control rubber type
Choose valve body material
Specify valve size (DN)
Indicate quantity

Learn more about each key step from our specification guide.

Specify your Wafer

We understand that selecting the right constant flow valve can be crucial to your project’s success.

Please consult our guide for help to specify your standard wafer valves step by step.

SPECIFICATION GUIDE

Specify Non-Standard Wafer-Type Valves

We understand that every application is unique. That’s why we offer personalized guidance and custom solutions tailored to your specific requirements.

For detailed specifications, pricing, availability, or any other inquiries, please don’t hesitate to contact us. Our team is ready to assist you in finding the right solution for your system.