Whether you’re an operator or a maintenance technician, use these tips for proper gauge installation to make sure your gauges perform as they should. After you mount the gauge, set the compensating valve from CLOSE to OPEN.Ī pressure gauge can do its job only if it’s installed properly. It should then be closed again to prevent any external ingress. When installing the gauge, open the compensation valve to allow this pressure to vent. This can cause the gauge pointer to be off zero. During shipment, liquid-filled gauges can go through temperature changes that create internal pressure build-up. Users who don’t understand the purpose of the valve are confused about why it’s included. Some gauges come with a small valve on top of the case. WIKA XSEL ® process gauges come standard with integrated pegs to insure this distance when mounting the gauge against a surface. In order for the safety device to function properly, it is important to keep a minimum space of 1/2 inches. In the event of a pressure build-up inside the case or a catastrophic Bourdon tube rupture, all the energy and release of media will be directed to the back of the gauge, thus protecting the people reading the gauge. Leave Space for Blow-outįor personnel safety, some gauges come with a safety pattern design consisting of a solid wall between the front of the gauge and the Bourdon tube, and a blow-out back. At this point you have approximately one turn left to put the gauge into the desired position. As soon as you encounter a resistance, apply an open-end wrench to the wrench flat and continue turning the gauge. You start by tightening the gauge by hand. The WIKA sealing ring allows you to correctly orient the gauge after the socket has been seated on the sealing ring. For that reason, we recommend using WIKA sealing rings (crush rings) instead of flat washers. However, with straight threads the face orientation is not adjustable once it bottoms out. This allows for convenient orientation of the gauge face. When tapered threads are used, the installer has the luxury of adjusting the gauge even after sufficient torque has been applied. Use a Clamp Socket or Union Nut with Straight Thread This is standard practice for any pipe fitter because tapered threads do not provide complete sealing on their own. If the gauge has tapered threads, additional means of sealing, such as PTFE tape, are recommended. If the gauge has parallel threads, seal it using sealing rings, washers, or WIKA sealing rings (crush rings). Notice the type of threads on the gauge before you seal it. Not applying sufficient torque could result in leaks. Applying the force through the case could damage the case connection as well as the gauge internals. Rather than turning the case by hand, use an open-end wrench and apply force to the wrench flat. Once you’ve chosen the correct gauge, pay attention to how you install the gauge. However, even if you install the gauge perfectly, you could face the same problems you had before the installation if the gauge isn’t the right one for the job.
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