All valves and manifolds as well as our Double Block & Bleed Piping Ball Valves are suitable for up to 100% hydrogen use. In other words, our instrumentation valves and process valves can also be used safely in natural gas applications with, for example, a 20% hydrogen blending. This feature is of particular interest to natural gas plant operators and gas network operators who want to convert their natural gas pipelines for hydrogen.
 Datasheet |
AS-Schneider Instrument Monoflanges are close coupled to a pre-installed primary isolation valve to provide a compact instrument Double Block and Bleed Valve or are used when primary isolation valves with an OS & Y Bolted Bonnet are not required. The needle valves of the Instrument Monoflanges are provided with a screwed bonnet. The Standard Pressure Instrument Connection is 1/2 NPT female, the Standard Process Connections are provided by Flange Connections acc. to ASME B 16.5. AS-Schneider is providing axial, radial or dual outlet types for either Horizontal or Vertical Flange Mounting. The Monoflanges are available as Block, Block & Bleed or Double Block & Bleed designs.
| Datasheet |
At AS-Schneider, we have been experts in the effective control of Fugitive Emissions from valves for more than a decade. Our Instrumentation Valves and Process Valves are available acc. to ISO 15848-1 and the TA-Luft option acc. to the amendment (status 2021). Our extensive portfolio has been certified by TÜV Süd.
| Datasheet |
AS-Schneider Process Monoflanges (A frequently used term is also Slimline Monoflange) are designed to replace the traditional primary isolation valve and are close coupled to the process piping flange, for connecting process to instruments. The primary isolation valve needs to be of process design, therefore it's a valve with OS&Y Bolted Bonnet. The secondary isolation valve and the bleed valve are provided with screwed bonnets. The combining of piping and instrument valves into a single unit has benefitted various markets. The Standard Pressure Instrument Connection is 1/2 NPT female, the Standard Process Connections are provided with Flange Connections acc. to ASME B 16.5. AS-Schneider is providing axial, radial or dual outlet types for either Horizontal or Vertical Flange Mounting. The Monoflanges are available as Block, Block & Bleed or Double Block & Bleed designs.
| Datasheet |
AS-Schneider VariAS-Blocks are designed to replace conventional, multiple-valve installations and are close coupled to the process piping flange, for connecting process to instruments. The primary isolation valve needs to be of process design. Primary and Secondary Isolation Valve are, as standard, ball type valves with floating ball, the bleed valve can be provided as needle type valve with screwed bonnet as well as ball type valve with a 3-way T-Port ball. Process and Instrument Connections are provided, as standard, with Flange Connections acc. to ASME B 16.5. The VariAS-Blocks are available as Single Block & Bleed or Double Block & Bleed designs. The VariAS-Blocks are available with Bore Size 10, 14 and 20 mm.
| Datasheet |
AS-Schneider VariAS-Blocks are designed to replace conventional, multiple-valve installations and are close coupled to the process piping flange, for connecting process to instruments. Primary and Secondary Isolation Valve are, as standard, ball type valves with floating ball, the bleed valve can be provided as needle type valve with screwed bonnet as well as ball type valve with a 3-way T-Port ball. The Standard Pressure Instrument Connection is 1/2 NPT female, the Standard Process Connections are provided with Flange Connections acc. to ASME B 16.5. AS-Schneider VariAS-Blocks are provided with an axial outlet and normally used for Vertical Installations (Vertical Tap). The VariAS-Blocks are available as Single Block & Bleed or Double Block & Bleed designs. Options like Sampling and Injection Applications are also available. The VariAS-Blocks are available with Bore Size 10, 14 and 20 mm.
| Datasheet |
Monoflange and VariAS Blocks by Armaturenfabrik Franz Schneider GmbH + Co. KG
Monoflange and VariAS blocks from Armaturenfabrik Franz Schneider GmbH + Co. KG are compact valve assemblies designed for pressure measurement applications such as gauges, differential pressure transmitters and pressure sensors. They integrate multiple valve functions into a single unit and enable a space-saving, secure installation directly at the measurement point.
Monoflange blocks are mounted directly to the flange of a measuring instrument, eliminating the need for extra piping. VariAS blocks provide flexible connection options and combine several valve functions—such as isolation, switching and venting—in a compact assembly that is widely used in process and instrumentation systems.
Frequently Asked Questions about Monoflange and VariAS Blocks
What is a Monoflange block?
A Monoflange block is a valve block engineered to mount directly to the flange of a pressure measuring instrument and integrate multiple valve functions in one compact unit.
What does VariAS block mean?
A VariAS block is a modular valve block that combines various valve functions and offers flexible connection options to suit different process needs.
Where are these blocks used?
They are used in pressure measurement systems where multiple valve functions need to be implemented in a compact and accessible arrangement.
What are the benefits of a Monoflange block?
Monoflange blocks save space, reduce piping requirements and improve organization at the measurement point by mounting directly to the instrument flange.
What are the benefits of a VariAS block?
VariAS blocks provide flexibility in combining multiple valve functions in one compact unit, allowing for tailored solutions to specific measurement tasks.
How do they differ from standard manifold blocks?
Compared to standard blocks, Monoflange and VariAS blocks integrate functions more compactly and often reduce the need for separate adapters or piping.
How are these blocks installed?
Monoflange blocks are flange-mounted directly to an instrument, while VariAS blocks are mounted with appropriate threaded connections near the measurement point.
Which instruments are compatible?
They are suitable for gauges, differential pressure transmitters and other pressure instruments with compatible flange or thread connections.
Are they suitable for high pressure?
Yes, Monoflange and VariAS blocks are designed for industrial pressure ranges and provide reliable performance even under elevated pressures.
How do they support maintenance?
The compact layout and direct mounting make accessing valve functions and performing maintenance or calibration easier.
What materials are used?
Common materials include high-strength corrosion-resistant metals such as stainless steel for broad process compatibility.
How do these blocks affect leak performance?
The reduced number of connections and compact design help minimize potential leak points.
Can multiple valve functions be combined?
Yes, especially VariAS blocks can combine isolation, switching and venting functions in a single unit.
How do I choose the right block?
Consider the instrument type, connection format, number of valve functions needed and your process parameters such as pressure, medium and temperature.
Can these blocks be retrofitted?
In many cases, Monoflange or VariAS blocks can be added to existing installations if connection standards and installation space are compatible.