Annular Flow-Thru Diaphragm Seal

An annular flow-thru diaphragm seal places a ring-shaped sensing diaphragm around a center process passage. Process fluid moves through the passage while pressure acts on the annular diaphragm. A sealed fill fluid transfers that pressure to the attached gauge, transmitter, switch, or remote instrument while keeping the instrument isolated from the process.

A conventional diaphragm seal normally senses pressure at the end of a branch or nozzle. The HAN is installed in the process line so fluid passes through its center bore. This arrangement can be considered when an inline pressure interface is preferred, but the bore, pressure drop, cleanability, solids handling, and dimensional fit must be reviewed for the actual application.

The current configurator lists Wafer under code W, Flanged under code F, Sanitary Tri-Clamp under code T, and Sanitary I-Line under code C. Some size and connection combinations are conditional, so the selected arrangement should be validated in the live configurator and on the approved drawing.

The current configurator lists 1.0-inch code 10, 1-1/2-inch code 15, 2.0-inch code 20, 3.0-inch code 30, and 4.0-inch code 40. Availability can depend on the selected wafer, integral-flanged, Tri-Clamp, or I-Line type.

The current HAN configurator lists a welded 8 mm connection under code W, a 1/4-inch NPT connection under code 2, and a 1/2-inch NPT connection under code 4. The instrument attachment and the complete filled system should be selected together.

The current configurator lists 316 stainless steel, 304 stainless steel, Alloy 20, Alloy C-276, Alloy B-3, Monel 400, Alloy 600, Alloy 2205, and Nickel 201/200 for the combined wetted body and diaphragm selection. Final suitability depends on the complete process chemistry, temperature, velocity, solids, cleaning method, and expected service life.

The configurator lists process-interface selections including ANSI wafer service and integral flange classes from 150 through 2500. Those class designations are not, by themselves, a universal seal maximum working pressure. Obtain the approved pressure and temperature rating for the exact type, size, material, connection, instrument attachment, and filled assembly.

Haygor's current product name identifies this HAN family as the 90 mm body-length version. Confirm the exact face-to-face, bore, flange, clamp, extension, and instrument-clearance dimensions for the selected type because connection geometry and application requirements can affect the completed envelope.

The current configurator lists /AU for a gold-plated diaphragm, /NS for a PTFE-coated non-stick diaphragm, and /E for an electropolished diaphragm. The /NS coating should not be treated as a substitute for a corrosion-compatible base alloy.

No. A sanitary-style connection does not by itself establish a required hygienic standard, surface finish, drainability, elastomer compliance, cleanability, certification, or validation status. State the applicable sanitary specification and obtain confirmation for the complete assembly.

Provide the process fluid and concentration, solids or fibers, flow velocity, operating and design pressure, vacuum and transient conditions, process and ambient temperature, pipe size and schedule, required bore, connection style and class, sanitary standard if applicable, wetted material, surface-finish requirements, instrument model and range, attachment or capillary details, fill-fluid constraints, installation orientation, cleaning method, and documentation requirements.