CONTACT US      email    |   07 3823 1922 

91/CFN Schaffer Diaphragm Gauge

91 CFN Shcaffer Diaphragm Seal Budenberg Australia @ Procon Instrument Technology

Schaffer Diaphragm Gauge, Stainless Steel with Flanged Connection

The Budenberg model 91/CFN Schaffer Diaphragm gauge has been designed for use on slurries, viscous or corrosive fluids that would normally attack or block standard bourdon tube gauges.

Implementing specialist materials for both the connection and diaphragm enable the Shaffer Diaphragm gauge to be configured for use on any gaseous or liquid media including suspended solids or powders. The direct drive from the diaphragm to the movement ensures a more positive indication of pressure than other models of tube gauges.

The P91/CFN offers a full range of flanged connection sizes and materials, Schaffer Diaphragm gauges can operate at pressure ranges as low as 30 mBar with the option to permit units to withstand a maximum pressure of 70 bar.

    contact us   for pricing and availability of the Budenberg 91/CFN Diaphragm Seal Gauge


The Budenberg 91/CFN is suitable for the following applications / industries

Designed for continuous operation on gases or liquids where the product to measured is of a hygienic and or foodstuff nature.

Versions are available to withstand pressure pulsations, vibrations and operation at very high temperatures.

Oil and Gas Pressure Gauge Budenberg Australia @ Procon Instrument Technology
Oil & Gas
Pressure Gauge
Petrochemical Pressure Gauge Budenberg Australia @ Procon Instrument Technology
Pressure Gauge
Chemical Pressure Gauge Budenberg Australia @ Procon Instrument Technology
Pressure Gauge
Power Generation Pressure Gauge Budenberg Australia @ Procon Instrument Technology
Power Generation
Pressure Gauge
Waste Water Pressure Gauge Budenberg Australia @ Procon Instrument Technology
Water & Waste Water
Pressure Gauge


The Budenberg 91/CFN specifications

Size 100mm (4")
Case & Bezel Stainless Steel fully Safety Pattern, with solid wall and blow out back, with polished stainless steel bezel
Scale Ranges
0 to 30 mBar up to 25 Bar Pressure / Compound ranges
Equivalent units of pressure / vacuum available
Single and Dual scales are available
Option: Custom scales for special applications, ie: tank contents
Units will withstand overload pressure up to 125% of FSD
Pressure Connection
Flange Sizes 1/2", 3/4", 1", 1.5" & 2"
Rated 150, 300, 600, 900 & 1500, Raised Face
Also Available: DN15, DN20, DN 25, DN 40 & DN50 PN10-40 and 1/2", 3/4", 1", 1.5" 2" Table A-E
All Connections have a Bobin Neck assembly except flanges 1.5" & 2" 900/1500RF & DN50, where this is not required
Connection Material
316 Stainless Steel as standard
Options: Carbon Steel, Monel, Titanium, Hastelloy, Tantalum
Lining Options: PTFE, Halar, PDA
Diaphragm Material
Stainless Steel as standard
Options: Monel, Tantalum, Hastelloy, Silver or PTFE Protected
Other Materials to suite application are available 
Accuracy Class
1.0% of FSD as defined in EN837-1
1.5% of FSD if diaphragm is protected
Environmental Rating
IP65 as defined in EN 60 529
Operating:  -10 to +60°c
Storage:  -40 up to +100°c 
For lower or higher operating temperatures, please contact our office 
Certification & Traceability
All instruments are individually calibrated and have an unique Serial Number Printed on Dial.
Certificate of Conformity traceable to National Standards is supplied
BS EN 10204 3.1B Material Certification
Point by Point Test Certificate
Safety All units are manufactured to comply with EN837-1, S3 Specification and other regulatory standards including PED.


91/CFN Dial Specifications

Size 100mm (4")
White Anodised Aluminium marked in black finish
Dual Scale, bands, sectors are also available.
Customisation with Company Name or Logo.
Aluminium coloured black
Option: Micrometer adjustable pointer for Ranges > 350 mBar
Brass Construction
Laminated Safety Glass (standard)
Option: Acrylic Plastic Window


91 / CFN Specification Sheet Download

To view all the information on the Budenberg 91/CFN you can download the data sheet here