Rosemount 1299 Diaphragm Seal System
- Product Name: Rosemount 1299 Diaphragm Seal System
- Manufacturer: Emerson Automation Solutions
- Brand: Rosemount
Description of Rosemount 1299 Diaphragm Seal System
The Rosemount 1299 Diaphragm Seal System is designed to protect pressure instruments (such as pressure transmitters and gauges) from corrosive, viscous, high-temperature, or crystallizing process media. It isolates the instrument from direct process contact while accurately transmitting process pressure through a filling fluid.
Diaphragm seals ensure long-term stability, increased reliability, and extended service life of pressure instruments in demanding industrial environments.
Key Features of Rosemount 1299 Diaphragm Seal System
- Corrosion Resistance: Wetted parts available in a variety of materials such as stainless steel, Hastelloy, Monel, and others
- Flexible Mounting: Options for remote, direct, or side entry configurations
- Wide Temperature Capability: High-temperature and low-temperature service suitability
- Stable Filling Media: Compatible fluids to match process conditions
- Sanitary Options: Suitable for food, dairy, pharmaceutical, and biotech industries
- High Pressure Capability: Designed for both low and high-pressure applications
- Reliable Performance: Reduces clogging, freezing, and crystallization risks
Technical Specifications of Rosemount 1299 Diaphragm Seal
| Specification Category | Details |
|---|---|
| Model/Series | Rosemount 1299 Diaphragm Seal System |
| Function | Isolation and protection of pressure instruments |
| Pressure Range | From vacuum up to high pressure (specific range depends on configuration) |
| Connection Types | Flanged (ANSI, DIN), Threaded (NPT/BSP), Tri-Clamp (sanitary) |
| Wetted Materials | SS316/SS316L, Hastelloy C-276/C-22, Monel, Alloy 20, PTFE-lined options |
| Diaphragm Materials | SS316L, Hastelloy, Tantalum, PTFE, others based on process needs |
| Filling Fluids | Silicone oil, glycerin, halocarbon, others based on temperature/compatibility |
| Temperature Range | Process-dependent; extended up to ~400°C with special options |
| Mounting Configurations | Remote, direct, side-entry, and sanitary configurations |
| Compatibility | Works with Rosemount pressure transmitters, differential pressure transmitters, and gauges |
| Response Time | Dependent on configuration, fast pressure transmission |
| Accuracy Impact | Minimal when correctly specified |
| Maximum Pressure | Application-dependent (consult configurations) |
| Ingress Protection | IP66/IP67 (depending on transmitter choice) |
Operating Principle
The diaphragm seal isolates the measuring instrument from the process media. The diaphragm deflects with pressure changes and transmits this movement through a filled capillary system to the sensing element of the pressure instrument. The fill fluid maintains a consistent hydraulic link between the process diaphragm and the instrument.
Applications
The Rosemount 1299 Diaphragm Seal System is used in:
- Chemical and petrochemical processing
- Oil & gas upstream and downstream
- Power generation
- Pharmaceuticals and biotech
- Food and beverage processing
- Pulp and paper manufacturing
- Water/wastewater treatment
- Any application with corrosive, high-temperature, or viscous fluids
Installation Guidelines
- Select correct diaphragm material based on corrosivity and temperature
- Confirm connection type (flanged/threaded/sanitary) matches process
- Ensure proper orientation per instrument manufacturer recommendations
- Use appropriate capillary length to locate instruments away from harsh environments
- Ensure fill fluid compatibility with temperature and process media
- Follow torque and sealing best practices for flanges or sanitary connections
Environmental and Safety Ratings
- Designed for industrial environments
- Resistant to corrosion, vibration, shock
- Meets industry standards for pressure equipment
- Optional sanitary versions for food/pharma standards
Accessories and Options
- Capillary lengths (up to specified meters)
- Sanitary fittings (Tri-Clamp)
- Flush flanges
- High-temperature adapters
- Protective covers or insulators
Packaging and Identification
- Individual packaging with protective caps
- Identification tag with:
- Model number
- Serial number
- Wetted materials
- Pressure range
- Temperature rating
- Documentation includes:
- Installation instruction
- Calibration certificate (if requested)
Warranty
Manufacturer standard warranty applies, typically covering defects in materials or workmanship, subject to Emerson’s terms and conditions.
Concluding Summary
The Rosemount 1299 Diaphragm Seal System is a robust, flexible solution for protecting pressure-measurement devices in demanding industrial applications. It enhances reliability and longevity of instruments by isolating them from harsh process conditions while maintaining accurate pressure transmission.
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