Rosemount 1199 Diaphragm Seal

Designed for the most demanding industrial environments, this advanced isolation solution safeguards pressure and differential pressure transmitters from aggressive process fluids. Whether dealing with extreme temperatures, corrosive media, or viscous materials that risk clogging traditional lines, the Rosemount 1199 diaphragm seal provides a reliable barrier that extends transmitter life and minimizes maintenance requirements. By eliminating the need for impulse piping and wet legs, this system significantly reduces potential leak points and installation complexity, offering a robust solution for difficult process measurements.

Key Features and Benefits

Versatile System Configuration: Available in Direct Mount, Remote Mount, and Balanced System configurations to suit diverse installation constraints.
Optimized Performance: The exclusive Tuned-System™ Assembly reduces temperature effects by up to 20% and improves response time by over 80% compared to traditional capillary installations.
Enhanced Reliability: Features all-welded vacuum system construction options, ensuring stability in vacuum applications and preventing air ingress.
Comprehensive Compliance: Fully certified to global standards, including SIL 2/3 (IEC 61508), NACE® for sour gas environments, and 3-A sanitary standards for hygienic applications.
Broad Material Compatibility: Offers a wide selection of wetted materials such as Tantalum, Alloy C-276, and Gold-plated diaphragms to resist corrosion and hydrogen permeation.

Industry Applications and Technical Specifications

The Rosemount 1199 system is engineered to handle complex challenges across industries like Oil & Gas, Chemical Refining, Pulp & Paper, and Food & Beverage. It excels in applications involving high-temperature fluids where fill fluid vaporization is a risk, or in sanitary processes requiring hygienic seals. The system supports various process connections, including flanged (ANSI/ASME, EN/DIN), threaded, and hygienic fittings, allowing for seamless integration into existing infrastructure.

Engineers can customize capillary lengths and fill fluids to optimize accuracy for specific environmental conditions. By upgrading to the Rosemount 1199 diaphragm seal, operators can achieve superior measurement stability in open or closed tank level applications, flow measurement, and interface monitoring, ultimately driving operational efficiency and safety.

Product Specifications

Item	Specifications
Seal System Type	Direct Mount, Remote Mount, Tuned-System, Balanced System
Transmitter Connection	Welded-Repairable, All Welded
Process Connection	Flanged: ANSI/ASME, EN/DIN, GOST, & JIS Threaded: NPT, DIN, ISO Hygienic
Process Wetted Material	316L SST, Alloy C-276, Alloy 400, Tantalum, Gold-plated Alloy 400, Gold-plated 316L SST, CorrosionShield PFA coated 316 SST, see PDS for full list of materials
Certifications/Approvals	SIL 2/3 certified to IEC 61508 by an independent 3rd party, 3A, NACE®, hazardous location, see PDS for full list of certifications

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