In the field of industrial measurement and control, the pressure gauge is an important basic instrument. But, for the successful pressure measurement of hard substances, the diaphragm seal pressure gauge happens to be the game changer. But what is a diaphragm seal in a pressure gauge, and why it matters so much?

Diaphragm Seal Pressure Gauge Part by Part

A diaphragm seal pressure gauge includes two primary elements: the standard pressure - sensing gauge itself and the diaphragm seal assembly. The diaphragm seal as such is a thin, flexible membrane made of a material of high quality (like for example stainless steel (e.g. SS 316L), PTFE (Polytetrafluoroethylene), Hastelloy. This membrane is encased in a housing that is in turn connected to the pressure gauge through a capillary filled with a transfer fluid, typically glycerin or silicone oil.

How the Diaphragm Seal Works

The diaphragm seal main purpose is to isolate the process media from the elements within the pressure gauge. The diaphragm: Itself subjected to the process medium pressure deforms elastically. This deformation is passed on to the transfer fluid in the capillary to act on a pressure sensitive element mounted inside the gauge (for example a Bourdon tube or the like or a transducer). By varying pressure on the diaphragm, the resulting relative displacement or electrical signal of the pressure - sensing element is converted to a pressure reading on the face of the gauge.

With potentially dangerous or work-intensive process media, this is a useful feature which prevents the process medium from ever having direct contact with the pressure gauges. For instance in Chemical plants using very corrosive acids or alkalis, the diaphragm seal protects the internals for the gauge from being eaten out by the chemical, producing faulty readings or even causing gauge three.

Diaphragm Sealed Pressure Gauges Uses

Chemical Industry

Diaphragm seal pressure gauges are required for chemical production in which aggressive mediums in a broad spectrum are utilized. Whether it is controlling the pressure in reactors during the synthesis of new compounds, or measuring the pressures of corrosive solvents in a pipeline, these gauges give you your accurate, reliable data, and protect your instrumentation from damage.

Food and Drug Manufacturers

Cleanliness is paramount in the food and pharmaceutical industries. Diaphragm seal manometers also find an important application here, by safeguarding the products from any kind of contamination. In the pressure measurement of food pastes, pharmaceutical slurries or other high viscosity products, the diaphragm seal functions as a sanitary barrier to prevent any of the gauge from coming into contact with the product, so that product integrity and safety can be assured.

Oil and Gas Industry

It's a tough game, the oil and gas business. Diaphragm seal pressure gauges are applied for the pressure measurement of crude oil in the presence of abrasive particles or viscous media. Whether in subsea environments or high - pressure wells, these gauges are durable enough to withstand the severe pressures and harsh media, while delivering the data necessary for effective extraction and processing.

Benefits of Using a Diaphragm Seal Pressure Gauge

Extended Instrument Life

Diaphragm seal pressure gauge, protects sensitive components of the pressure gauge from negative influences of the meassured media and thus increase the service life noticeably. This reduces the need for servicing and/or replacement which means huge savings over the long run.

Enhanced Measurement Accuracy

Because the pressure is directly transmitted by the diaphragm seal and is not influenced by the nature of the process medium (viscosity, aggression, temperature), the pressure measurement is more precise and as reproducible during operation. This precision is absolutely necessary in order to keep product quality and process control in many production industries.

Versatility

Diaphragm seal pressure gauges are extremely adaptable, and can be designed to accommodate specific operating conditions. Various diaphragm materials are available that are suitable to the process media, seal design can be adapted according to pressure ranges and environmental conditions.

In summary, diaphragm seal pressure gauges utilizing the innovative diaphragm seal technology play an important role in precise and reliable pressure measurement in the industrial sector. Protecting the see-through gauge and offering exact readings, diaphragm seal pressure gauges are indispensable in many industrial product lines which improves efficiency, safety and quality to manufactured and fabricated products.