Fitting a pressure gauge involves several key steps to ensure accurate readings and a secure, leak-free installation. These steps include selecting the right gauge, proper tightening techniques, sealing the connection, using appropriate fittings, allowing for blow-out protection, and venting the gauge case.
Here's a breakdown of the process:
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Select the Right Gauge:
- Before you start, ensure you have the correct type of gauge for the specific application. Consider factors like pressure range, media compatibility, and connection type. This is a critical first step.
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Apply Force on Wrench Flats:
- When tightening the gauge, apply force to the wrench flats on the gauge or fitting. This prevents damage to the gauge housing.
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Seal the Deal:
- Proper sealing is essential to prevent leaks. Use appropriate sealant or tape (such as Teflon tape) on the threads of the gauge or fitting before installation.
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Use a Clamp Socket or Union Nut with Straight Thread:
- For gauges with straight threads, utilize a clamp socket or union nut to achieve a secure and leak-proof connection. These fittings are specifically designed for straight thread connections.
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Leave Space for Blow-out:
- Ensure there's adequate space for the gauge to blow out in case of overpressure. This safety measure can prevent damage to equipment and injury to personnel.
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Vent the Gauge Case:
- Some pressure gauges have a vent in the case. Make sure this vent is open to allow for proper atmospheric pressure equalization within the gauge. This ensures accurate readings.
In summary, fitting a pressure gauge requires careful selection, proper installation techniques, and attention to safety measures. By following these steps, you can ensure accurate pressure measurement and a reliable system.
