diaphragm seal pressure gauges
What we offer?
Budenberg offers wide range of Industrial Pressure Gauges, Diaphragm Seal Gauges, Schaffer Diaphragm Gauges, Differential Pressure Gauges, Watertight Oil filled HT Cable Gauges and Pressure Gauges for special applications.
A Diaphragm or ‘Chemical Seal’ is a mechanical barrier that protects delicate instruments from harsh process fluids such as strong Acids, Alkalis and Slurries. All Chemical Seal units operate in an identical manner: the process medium acts upon a diaphragm the deflection of which is transmitted via the fill medium. This pressure is then displayed or transmitted.
Model 254 and 255 are a flexible range of diaphragm seal Gauges with features Filling Fluid for use in an extensive variety of applications throughout industry to include the most arduous process situations.
Designed for continuous operation on gases or liquids where the pressure element could be become corroded or clogged by the process media. Versions are available to withstand pressure pulsations, vibrations and operation at very high temperatures.
The style and materials of construction are carefully selected to withstand not only the process medium but also the maximum design pressure and temperature for each application.
The standard features include white Anodised Aluminium dial marked in black finish with Stainless steel black coloured pointer and IP67 protection as defined in EN 60529.
Model 254 is direct mount type and Model 255 is distance reading capillary type.
All Budenberg Gauges are designed and manufactured in the United Kingdom in compliance to EN837-3.
Specifications
Dial Sizes
63 mm (2.5″), 100 mm (4″) and 150 mm (6″)
Pressure Gauges
Refer to Model 966GP / Model 966TGP for suitable gauges
Scale Ranges
0 – 5 bar up to 400 bar (Model 254-WSE) – Welded diaphragm with screwed connection
0 – 1 bar up to 250 bar (Model 254-CSE) – Clamped diaphragm with Screwed connection
0 – 1 bar up to 250 bar (Model 254-CFN) – Clamped diaphragm with Flanged connection
0 – 5 bar up to 600 bar (Model 254-WF) – Welded diaphragm with Flanged connection
0 – 5 bar up to 300 bar ( Model 254-WHF) – Hygienic Welded diaphragm with Flanged connection
0 – 1 bar up to 40 bar (Model 254-WHT) – Hygienic Welded diaphragm with Triclamp connection
Overloads
130% overload as standard up to 200 Bar.
Optionally the diaphragm can be set to ‘lock off’ allowing the unit to withstand an overload up to the maximum pressure rating of the seal unit.
Materials of Construction
Standard – 316L Stainless Steel
Optional: “R” – Hastelloy C276, Titanium, Monel 400 or Tantalum. PTFE protection on clamp type only
Connections
Screwed: 1/2″ BSP male standard (Model 254-WSE) ; 1/2″BSP male and 1/2″ NPT male (Model 254-CSE)
Flanged: for Model 254-CFN, Model 254-WF and Model 254-WHF, refer datasheet for available sizes and types of flanges
Tri-clamp: for Model 254-WHT
Accuracy Class
1.0% of fsd as defined in EN837-1 ; NGST 3.5.9 issue 2 Type Tested.
Diaphragm Diameter
49 mm and 69 mm depending upon the size of the Gauge and type of Diaphragm connection
Capillary type & length (Model 255)
316 Stainless steel up to 50 metres.
Filling Fluids
Mineral Oil or Syltherm as standard
Optional: Silicon oil, Medicinal paraffin. Inert Fluorine based fluids can be specified for oxygen and chlorine
applications as well as a range of FDA approved fluids for
Electrical Contacts (optional)
Up to two independently settable electric contacts, each can have a different model of operation
Temperature
Operating: -20°C to 100°C
Higher operating temperatures up to 450°C are available depending upon the Model number
Certification
All Gauges are individually tested. A certificate of Conformity is supplied free of cost.
Calibration / Test Certificate and material certificate to BS EN10204 3.1B is supplied, if ordered separately.
The model 91 series Schaffer Diaphragm gauges are designed for use on slurries, viscous or corrosive fluids that would normally attack or block standard bourdon tube gauges.
The special design and materials for both diaphragm and connection enable Schaffer Diaphragm gauge to be configured for use on any gaseous or liquid media including suspended solids or powders.
The style and materials of construction are carefully selected to withstand not only the process medium but also the maximum design pressure and temperature for each application.
The standard feature include white Anodised Aluminium dial marked in black finish with Stainless steel black coloured pointer and IP65 protection as defined in EN 60529.
The units are available in four variants with different types of connections and case material:
Model 91/SE has Stainless Steel fully Safety Pattern Case with solid wall and blow out back and screwed connections.
Model P91/SE has special DMC* fully Safety Pattern Case with solid wall and blow out back and screwed connections.
Model 91/CFN has Stainless Steel fully Safety Pattern Case with solid wall and blow out back and flanged connections.
Model P91/CFN has special DMC* fully Safety Pattern Case with solid wall and blow out back and flanged connections.
All Budenberg Gauges are designed and manufactured in the United Kingdom in compliance to EN837-3.
* Dough Moulding Compound
Specifications
Dial Sizes
100 mm (4″) and 150 mm (6″)
Mounting
Direct
Pressure Gauges
Refer to Model 966GP / Model 966TGP for suitable gauges
Scale Ranges
0 – 30 mbar up to 25 bar pressure / compound ranges. Custom scales for special applications, i.e. tank contents
Overloads
125% of fsd. Refer to datasheet for maximum overloads on pressure ranges.
Connection Materials
316 Stainless Steel as standard
Optional: “R” – Carbon Steel, Hastelloy, Titanium, Monel, Tantalum.
Lining Option: PTFE, Halar and PDA
Connections
Screwed: 3/8″, 1/2″, 1/2″ NPT male as standard (Model 91/SE & P91/SE), other connections available on request
Flanged: for Model 91/CFN and P91/CFN, refer datasheet for available sizes and types of flanges
Diaphragm Materials
316 Stainless steel as standard.
Optional: “R” – Hastelloy, Monel, Tantalum, Silver or PTFE Protected
other materials to suit application are available
Accuracy Class
1.0% of fsd as defined in EN837-1 ; 1.5% of fsd if diaphragm is protected
Diaphragm Diameter
49 mm and 69 mm depending upon the size of the Gauge and type of Diaphragm connection
Electrical Contacts (optional)
Up to two independently settable electric contacts, each can have a different model of operation
Temperature
Operating: -20°C to 90°C ; Storage: -40°C to 100°C
Lower and Higher operating temperatures are available
Certification
All Gauges are individually tested. A certificate of Conformity is supplied free of cost.
Calibration / Test Certificate and material certificate to BS EN10204 3.1B is supplied, if ordered separately.
Pressure Gauge Syphons
The Syphons are designed to meet the demand for protection of instruments such as pressure gauges, where the application have high temperatures that can cause damage or inaccurate readings due to elevated temperatures. They collect condensate from the high temperature media which prevents direct contact with the pressure elements and dissipates the heat. Suitable for all media resistant to SS316.
Swivel Adaptor
The Budenberg Swivel Adaptor is designed for the ease of design and installation of Pressure Gauges and other instrumentation where positional orientation can be determined on site. They are ideal for connection of Pressure Gauges to Valves, and aids the ease of installation especially of Differential instruments. Suitable for all media that is resistant to 316 St.St. Working temperature is up to 400°C.
Viscous Damped Movement
The Budenberg VDM is used to overcome the effects of vibration and pulsation. It is used in place of glycerine filling which increases the weight of the Gauge that puts extra strain on installation. VDM applied damping to the movement mechanism at two key operational points, hence keeps gauge clean. Gauge that are fitted with VDM can be easily calibration than glycerine filled gauges.
Gauge Saver (OVP Valve)
The Budenberg Over range Protection (OVP) Valve or Gauge Saver has been primarily designed to Pressure Gauges or other instruments against over pressure conditions, either designed or accidental due to failure of other systems. The unit can be fitted directly to the instrument to be protected on any clean, non-viscous fluids or gases that are compatible with chosen materials of construction.
Adjustable Snubber
The Budenberg Adjustable Snubber is designed to meet the demand for protection of Pressure Gauges, where the applications have rapid pulsations or sudden hydraulic shock loading that can damage them. The level of damping is by the adjustment of the needle valve that restricts the flow and therefore protects the pressure gauge against pulsations. Working temp. is up to 120°C.
Check Valve
The Budenberg Check Valve has been designed to meet the demand from applications where high pressures and arduous duties are standard. The valve permits gases and liquids to flow only in one direction, thus preventing the process flow from reversing. The process flow in the desired direction opens the valve, and during the reverse flow the poppet is forced back into its seat closing the Valve.
