Baumer BQ Bellows Pressure Gauge - DN 150 mm

A. Product Overview

The Baumer BQ bellows pressure gauge is an industrial pressure measuring instrument designed for accurate low pressure measurement. It comes with a large DN 150 mm dial size, making it easy to read from a distance in plant, utility and process areas.

This model is suitable for pressure ranges from 4000 to 6000 mmWC and 1 to 6 bar. It offers accuracy class 1.0 for 1 to 6 bar and accuracy class 1.6 for 4000 to 6000 mmWC, making it suitable for low pressure monitoring where reliable indication is required.

The gauge has an AISI 304 stainless steel bayonet case, with optional AISI 316 stainless steel case for more demanding environments. The sensing element is made from AISI 316L stainless steel bellows, and the process connection material is also AISI 316L stainless steel.

Available process connections include 1/2 inch BSP male and 1/2 inch NPT male. Mounting options are type 1 and type 6. The standard protection class is IP65, with optional IP67. A glycerin filled option is also available for applications with vibration or pressure pulsation. The gauge follows EN 837-3 reference standard.

B. Working Principle

The Baumer BQ pressure gauge works on the bellows sensing principle. When pressure enters through the process connection, it acts on the stainless steel bellows. The bellows expands or contracts depending on the applied pressure.

This movement is transferred through the internal mechanical movement system to the pointer. The pointer then moves across the dial and shows the pressure value in the selected range.

Bellows type pressure gauges are especially useful for low pressure applications because the bellows element can detect small pressure changes more effectively than many standard bourdon tube gauges. This makes the Baumer BQ suitable for low pressure measurement in air, gas, utility and process systems.

C. Why It Is Used

The Baumer BQ bellows pressure gauge is used where low pressure needs to be measured clearly and reliably. Its large DN 150 mm dial makes it easy for operators to monitor pressure during plant operation, maintenance and inspection.

It is used for:

Low pressure measurement in industrial process lines
Air and gas pressure monitoring
Blower and fan pressure indication
Filter pressure monitoring
Utility line pressure measurement
Furnace and burner pressure monitoring
HVAC and ventilation system pressure checking
Process equipment pressure indication
Applications where a large dial is required for easy visibility
Applications with vibration where glycerin filling is preferred
Industrial areas where stainless steel construction is required

The gauge is useful because it provides a clear analog pressure reading, stainless steel wetted parts, low pressure sensitivity and reliable mechanical operation without the need for external power.

D. Suitable Buyers

The Baumer BQ bellows pressure gauge is suitable for buyers who need low pressure measurement with a large dial and stainless steel construction.

Suitable buyers include:

Process industries
Chemical plants
Pharmaceutical plants
Food and beverage plants
Power plants
Cement plants
Sugar plants
HVAC contractors
Boiler and furnace manufacturers
Blower and compressor system manufacturers
Panel builders
System integrators
Instrumentation contractors
Maintenance departments
Purchase departments looking for Baumer pressure gauges
OEM machine manufacturers
Utility and plant engineering teams

FAQ

1. What is the Baumer BQ bellows pressure gauge used for?
The Baumer BQ bellows pressure gauge is used for low pressure measurement in industrial applications such as air lines, gas systems, filter monitoring, HVAC systems, utility lines, blower systems and process equipment.

2. What is the dial size of the Baumer BQ pressure gauge?
The Baumer BQ pressure gauge comes with a DN 150 mm dial size, which provides clear visibility and easy pressure reading.

3. What pressure ranges are available in the Baumer BQ bellows pressure gauge?
The available pressure ranges are 4000 to 6000 mmWC and 1 to 6 bar.

4. What is the accuracy class of this pressure gauge?
The accuracy class is 1.0 for 1 to 6 bar and 1.6 for 4000 to 6000 mmWC.

5. What type of sensing element is used in Baumer BQ?
The Baumer BQ uses an AISI 316L stainless steel bellows sensing element.

6. What is the case material of the Baumer BQ pressure gauge?
The standard case material is AISI 304 stainless steel bayonet case, and AISI 316 stainless steel is available as an option.

7. What process connections are available?
The Baumer BQ bellows pressure gauge is available with 1/2 inch BSP male and 1/2 inch NPT male process connections.

8. Is the Baumer BQ pressure gauge suitable for low pressure applications?
Yes, the Baumer BQ is designed for low pressure applications and is suitable for pressure ranges in mmWC and low bar ranges.

9. Is glycerin filling available in this model?
Yes, a glycerin filled option is available. It is useful in applications with vibration, pulsation or fluctuating pressure.

10. What is the protection class of Baumer BQ?
The standard protection class is IP65, and IP67 is available as an optional protection class.

11. Which mounting types are available in Baumer BQ?
The Baumer BQ pressure gauge is available with mounting type 1 and type 6.

12. Which standard does the Baumer BQ pressure gauge follow?
The Baumer BQ bellows pressure gauge follows EN 837-3 reference standard.

13. Is Baumer BQ suitable for high pressure hydraulic applications?
No, Baumer BQ is mainly suitable for low pressure measurement. For high pressure hydraulic applications, a bourdon tube pressure gauge or hydraulic pressure gauge should be selected according to the required pressure range.

14. Why is a bellows pressure gauge used instead of a bourdon tube gauge?
A bellows pressure gauge is preferred for low pressure measurement because the bellows element is more sensitive to small pressure changes. This makes it suitable for mmWC and low bar pressure ranges.