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Primary Seal ? Seal Faces MaterialDescriptionStainless Steel (SS)Type 304 or 316, used for most metal parts of the seal.Carbon (graphite) (CAR)Brittle material, easily affected by abrasive liquids. Better resistant to dry running.Silicon Carbide (SiC)Very wear-resistant but brittle material, very resistant to corrosion.2 more rows

There are a total of 18 genera of seals and 33 living species of seals within these 3 families. Here's a quick look at all of the seal species and what makes each type unique.

As per API 682 4th Edition, basedon arrangement mechanical seals can be classified as follows: Arrangement 1: Single seal. Arrangement 2: Dual seal with buffer fluid. Arrangement 3: Dual seal with barrier fluid.

An Electronic Seal in PDF is akin to an organization's rubber stamp on a paper, but it's more secure. An organization's electronic seal applied using PDF Electronic Seal API is supported by a digital certificate issued in the name of that organization.

The actual seal width is approximately 0,4 to 0,8 mm (0.016 to 0.032 in.) wider than the bore depth B. For all-rubber HS and HSS seals, the bore depth tolerance should be ±0,13 mm (0.005 in.) and ±0,10 mm (0.004 in.)

Summary SealMethodPackingBraided or formed material compressed in stuffing boxLip sealA circular elastomeric seal element in a rigid outer housingMechanical sealHighly polished faces (one stationary and one rotating) running against each other

Arrangement 1 seals provide a simple, cost effective sealing solution with a limited ability to control and detect excessive leakage. Arrangement 2 seals capture process leakage and allow for leakage monitoring at the expense of a more complex support system, external utilities and operator intervention.