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    Gauge Guard Isolator Gaskets

    Let’s be honest, you’d be forgiven for not having a firm grasp on what Gauge Guard Isolator Gaskets are and why they’re so important within high purity set-ups. Don’t worry, that’s all perfectly normal. Thankfully, here at puretransfer.com we’re all about sharing our know-how on the bits of kit that make the high purity world go round, so buckle up - here’s your guide to Gauge Guard Isolator Gaskets.

    Check out our range:

    EPDM Gauge Guard Isolator Gasket

    EPDM Gauge Guard Isolator Gasket

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    FKM Gauge Guard Isolator Gasket

    FKM Gauge Guard Isolator Gasket

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    Platinum Cured Silicone Gauge Guard Isolator Gasket

    Platinum Cured Silicone Gauge Guard Isolator Gasket

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    Tuf-Steel® Gauge Guard Isolator Gasket

    Tuf-Steel® Gauge Guard Isolator Gasket

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    Enhancing gauge performance & longevity:

    Sometimes known as ‘Gauge Protection Gaskets’, ‘Pressure Gauge Guards’ or ‘Gauge Shielding Gaskets’, Gauge Guard Isolator Gaskets are very special bits of kit that provide a contaminant-free seal to isolate and protect pressure gauges (or instruments) from often harsh process fluids (sometimes known as ‘media’) they’re measuring or monitoring.

    Put simply, these corrosion-resistant, chemical resistant Isolator Gaskets keep expensive equipment clean and prevent production assemblies from being contaminated by degraded instruments. In providing this vital barrier function, Gauge Guard Isolator Gaskets significantly improve the performance of the equipment they protect, by helping them to maintain their accuracy, while simultaneously extending their working life.

    All in all, they’re very useful bits of kit to have around the place.

    Installing a gauge guard isolator gasket:

    The installation process for a Gauge Guard Isolator Gasket must be performed by a skilled technician, as a badly installed isolator will not fulfil the basic function of separating instruments from potentially degrading and polluting contaminants. Installation involves placing the gasket between the instrument’s flange and the process connection. When properly introduced, the gasket creates a sealed and isolated chamber for the pressure gauge or instrument. Cosy eh?

    How gauge guard isolator gaskets work:

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    Acting a little like a mini high purity umbrella (admittedly, not a phrase you hear that often), these specialised bits of kid comprise of a top quality sanitary gasket combined with a high tech membrane, that together isolate hot or caustic solutions from critical (and often vastly expensive) instrumentation. Without this isolation, instruments and gauges would be affected by whatever media is within a production assembly, inevitably leading to problems with the accuracy of readouts and a significantly reduced lifecycle for the equipment itself. These umbrella-like gaskets are so vital to maintaining an effective production assembly that a failure to use them will void most instrument or gauge warranties. Take the hint, always use a Gauge Guard Isolator Gasket.

    The Bodyguard – corrosion and contamination protection:

    Another way of looking at them is to see Gauge Guard Isolator Gaskets acting like bodyguards, ‘taking the bullet’ for important kit (like extremely sensitive pressure gauges), protecting it from exposure to any contaminants that may be present, along with corrosive chemicals or abrasive materials that may cause problems.

    Proven savings during gauge maintenance:

    A key benefit of using a Gauge Guard Isolator Gasket is cost. By making instruments more durable, the introduction of Isolator Gaskets means that fewer replacements are needed – with obvious financial ramifications. Another benefit occurs when the time comes to maintain or calibrate a gauge or instrument. Isolator Gaskets can be removed to allow for easy access to the gauge or instrument in question without needing to shut down an entire process line. The savings provided by this feature can be vast.

    Reduce the risk of leaks:

    One of the key benefits of using Isolator Gaskets is they’re designed to create a reliable and leak-free seal between the instrument that’s being protected and the process line. This seal is vital, as it dramatically reduces the risk of leaks from the line. The benefits of having a process line that doesn’t frequently leak, both in terms of environmental issues and safety hazards, are obvious.

    Industries that use Gauge Guard Isolator Gaskets:

    Isolator Gaskets are used across a dizzying array of industries, from biotechnology to beverage, food to fine pharmaceuticals. Specialist manufacturers, such as the semiconductor sector where even microscopic contaminants can be detrimental, rely heavily on Isolator Gaskets. Put simply, wherever there’s a gauge or instrument that needs to be protected, a Gauge Guard Isolator Gasket is usually close by.

    Different gaskets for different jobs

    Like the rest of us, Gauge Guard Gaskets come in a variety of shapes and sizes – they really do. There are many different versions of this type of gasket, each a specialist in dealing with guarding equipment from a specific type of media, or set of conditions in the process line. The choice can be quite daunting, with rubber, Teflon (PTFE) and a host of other elastomers being available.

    So, when you fit a Gauge Guard Isolator Gasket, you need a very clear idea of the type of job you’re asking it to do. The decision of which Isolator Gasket to introduce to a particular production assembly must be primarily informed by the media passing through the assembly in question and the conditions the gasket will experience. It’s also vital that whatever gasket is introduced to protect precision instrumentation must be corrosion resistant, high-temperature-resistant and chemical-resistant within the specific context it finds itself. What follows are different types of isolator gaskets that lend themselves to specific usages.

    EPDM Gauge Guard Isolator Gasket

    These Gauge Guard Isolator Gaskets are popular within many industries, such as the food, dairy, beverage, biotech and pharmaceutical sectors. EPDM Gauge Protection Gaskets are primarily used to protect stainless steel diaphragms and instruments. Before choosing an EPDM gasket it’s important to consider that they cope best in low-pressure steam applications. If the environment you’re looking to isolate is highly pressurised, choose another gasket.

    FKM Gauge Guard Isolator Gasket

    Some Gauge Guard Isolator Gaskets are specified by process equipment manufacturers, so check what your equipment supplier recommends. Like the EPDM gaskets the FKM versions are popular with the food, dairy, beverage, biotech and pharmaceutical sectors – where they protect stainless steel diaphragms and instruments. The important thing to remember, before choosing an FKM Gauge Guard Isolator Gasket, is the temperature range it’ll be working within. FKM gaskets don’t cope well with extreme cold (below -34℃). So, if that sounds like your production assembly, look elsewhere for your Isolator Gasket.

    Platinum Silicone Gauge Guard Isolator Gasket

    These, glamorously titled, gaskets are ideal for use in the production of fine pharmaceuticals, high-purity water, biotechnology and injectables as well as food and beverage products.

    The finish on platinum-cured silicone is extremely smooth, meaning that these gaskets are great at resisting product adhesion. This type of Gauge Guard Isolator Gasket is particularly popular in sanitary water systems, where a PTFE option isn’t viable due to cost considerations or misaligned fittings. We wouldn’t recommend using Platinum Silicone gaskets in low temperatures.

    Tuf Steel® Gauge Guard Isolator Gasket

    Created from a unique 50/50 blend of non-pigmented PTFE and 316L passivated and atomized stainless steel, these Isolator Gaskets are ideal for use in extreme temperatures – ranging from -350℉ to 550℉. Popular within the pharmaceutical, biotechnology, high-purity water, injectable and food and beverage sectors, these Gauge Guard Isolator Gaskets can protect stainless steel diaphragms and instruments from steam and hot oil. Their superior strength and chemical resistance means that they are very unlikely to leak. We wouldn’t recommend these gaskets to anyone on a tight budget or with a production assembly that doesn’t experience hellish variations in temperature.


    It’s vital to understand that high purity Gauge Guard Isolator Gaskets are so much more than ‘just another component’. These essential bits of kit act as a vital safeguard – ensuring the accuracy, integrity and safety of critical industrial processes. The importance of Isolator Gaskets simply can’t be underestimated and, as industries demand higher and higher standards of precision and purity, these remarkable gaskets will prove themselves increasingly valuable.

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