SIEMENS 41-30

Siemens 41-30 Pneumatic Constant Volume Regulator

Description

The Siemens 41-30 is a high-precision pneumatic constant volume regulator designed for use in industrial and commercial HVAC systems. As a non-relay type device, it offers direct and reliable control over airflow, making it an essential component for Variable Air Volume (VAV) terminal units. Its durable construction and manual adjustment knob ensure long-lasting performance and ease of calibration.

Specifications

• Manufacturer: Siemens
• Model: 41-30
• Product Type: Pneumatic Constant Volume Regulator
• Control Type: Non-relay
• Primary Application: HVAC, VAV Systems

Label Info

• Model: 41-30
• Assembled in: USA
• Date: 10/25/2011

Application

This regulator is specifically designed for maintaining a constant volume of air in pneumatic control circuits, typically found in older or specialized VAV boxes within commercial buildings to ensure consistent environmental comfort and energy efficiency.

Country of Origin

This product was assembled in the USA.

CO2 Impact

Opting for a refurbished Siemens 41-30 prevents the emission of approximately 10.0 kg of CO2 associated with the manufacturing of a new unit. This choice supports a more sustainable industrial ecosystem.

Availability

This item is an obsolete component but is available from our stock. Order now from spareparts2day for expert support and fast delivery.

FAQ

What is the primary application for the Siemens 41-30?

It is primarily used in HVAC systems, specifically within Variable Air Volume (VAV) terminal units, to maintain a constant airflow regardless of changes in upstream duct pressure.

Is this a relay or non-relay type regulator?

The Siemens 41-30 is a non-relay type regulator. This means it directly uses the control signal to actuate its internal mechanism without amplifying the signal.

What is the typical control air pressure range for this device?

While specifics should be confirmed with a datasheet, these types of pneumatic controls typically operate within a standard range of 3-15 psi (0.2-1.0 bar) for full modulation.

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Last Update: Friday, March 13, 2026