DIFFERENTIAL PRESSURE GAUGE MICROVAR DIAPHRAGM TYPE Model 180 differential pressure gauges are manufactured with a stainless steel diaphragm as the measuring element, the strength of which depends on the differential pressure graduation. The element is isolated from the pressure by two Melinex diaphragms so that only clean oil fills the chamber in which the mechanism operates. Melinex is a polyester film (polyethylene terephtalate) that is resistant to all petroleum refining industry fluids. Please consult our technical department to check suitability for other chemicals. This instrument is generally used in applications where the system pressure is very much higher than differential range and can be used for measuring differential pressure in filters , strainers, coolers, pumps, natural gas strainers, orifice plates and venturi tubes. Sizes 150mm & 200mm Dial diameter Mounting Surface Mounting – Model 180 Flush Mounting – Model 11/180 Pressure Connection 3/8" BSP internal as standard Option : 1/2" BSP & 1/2" NPT external Material : 316 Stainless Steel Option : Nickel Aluminium Bronze for Marine duty Pressure Element Stainless Steel Diaphragm Accuracy Class 180A & 180B - 1.5% of FSD 180AM & 180BM - 2% of FSD Environmental Rating IP55 as defined in EN 60 529 Temperature Utilization Operating: -20 to +90 Degrees C Storage: -40 up to + 100 Degrees C Case Brass machined casting, Grey finish Flush mounting version has a black bezel Window 3mm Glass, Acrylic or Laminated Glass Safety All gauges are manufactured in accordance with EN837-1 Scale Ranges 180A Ranges 0 to 0.2 up to 25 Bar 180AM Ranges 0 to 1 up to 25 Bar 180B Ranges 0 to 0.4 up to 25 Bar 180BM Ranges 0 to 1 up to 25 Bar Option: Central Zero Scales e.g. 1-0-1 Bar Applications Liquids use 180A or 180B Gases use 180AM or 180BM ( Not Oxygen) Dial White Anodised Aluminium marked in black Dual scale, bands, sectors are also available Customisation with Company Name & Logos Equalising Valves Budenberg recommends the use of needle type isolating or equalising valves for use with this instrument, as quick operating valves can cause harmful pressure surges. Please ask our sales department for details of the full range of Budenberg needle valves Snubbers If pressure surges or fluctuations cannot be eliminated we can offer gauges with an internal snubber which gives a delay of up to 20 seconds. Traceability All individually calibrated and have a unique serial number Certificate of Conformity traceable to National Standards Certification Available BS EN 10204 3.1B certification Point by Point Test Certificate

* Shown above with Surface mounting trunnions Microvars for use on :Minimum Differential Range Maximum Differential Range Maximum Working Pressure Accessories Electric Contacts. Model 144 Magnetically assisted contacts can be fitted as Single or Double units – See Datasheet on Electric Contacts. On Microvars if Make on Fall contacts are fitted, they are only adjustable over the bottom third of the scale. Valves. We can supply 3 or 5 Valve manifolds with our differentials – See separate Datasheet on 3 & 5 Valve manifolds. The use of Needle Valves is recommended for equalising or isolating the...