Rosemount 306 In-Line Instrument Manifold

Rosemount 306 In-Line Instrument Manifold Model Series: Rosemount 306 Manufacturer: Emerson Process Management (Rosemount) Product Type: In-Line Instrument Manifold Product Description of Rosemount 306 In-Line Manifold The Rosemount 306 In-Line Instrument Manifold is a precision-engineered manifold used for isolating, equalizing, venting, and calibrating differential pressure and flow instruments. It provides reliable pressure connections between process lines and field transmitters, improving safety, stability, and measurement accuracy in industrial process control systems. Key Features of Rosemount 306 In-Line Instrument Manifold Designed for direct inline mounting with differential pressure instruments Robust corrosion-resistant construction for harsh industrial environments Integrated valves for isolation, equalization, venting, and calibration Compact, modular configuration supports easy installation and service Compatible with Rosemount pressure transmitters and most industry-standard devices Minimizes process fluid leakage and improves system safety Technical Specifications of Rosemount 306 In-Line Manifold Parameter Description Model Rosemount 306 In-Line Instrument Manifold Manufacturer Emerson Process Management / Rosemount Material of Construction Stainless Steel (316/316L typical) Number of Valves Configurations: 3-valve, 5-valve (depend on model) Valve Type Needle valves with blow-out proof stem Connections (Process) Threaded (e.g., 1/4″–1/2″ NPT/BSP) or Flanged (ANSI/DIN standards) Test Port Connections Standard test ports for calibration Maximum Working Pressure (MWP) Up to 6,000 psi (413 bar) depending on model and connection Temperature Range −40°C to 200°C (depends on seals and materials) Seal Material PTFE/Graphite (standard), optional elastomers Design Standard ASME B31.3 / ANSI compliance Surface Finish Machined and passivated per industry specification Mounting Direct inline with transmitter or panel mountable Weight Varies by configuration and materials   Functional Description of Rosemount 306 In-Line Manifold The Rosemount 306 In-Line Instrument Manifold integrates multiple valve functions into a single assembly: Isolation Valves: Shut off process fluid from the transmitter for maintenance. Equalization Valve: Balances pressure across high/low sides before removal or calibration. Vent/Drain Ports: Enables safe venting of trapped pressure for zeroing or calibration. Test Ports: Provides access for field calibration without disconnecting lines. This integrated design reduces piping, improves safety, and enhances instrument performance. Application Areas The Rosemount 306 manifold is ideal for: Differential pressure measurement Flow measurement (orifice, venturi, DP flow sensors) Level measurement in pressurized vessels Industrial automation instrumentation Chemical, petrochemical, power generation, and oil & gas facilities Installation and Mounting Recommended best practices: Mount the manifold securely with proper support to prevent vibration transmission to instruments Align process connections accurately; avoid strain on valves Ensure valve positions are clearly labeled for isolation, equalization, venting Use proper torque values on fittings to avoid leaks Test operation before integrating with control systems Materials and Corrosion Resistance Standard construction materials are selected to provide long service life in corrosive environments: Body: 316/316L Stainless Steel for excellent corrosion resistance Seals: PTFE, Graphite, or optional high-temperature versions Valves: Precision needle valves designed for high cycle life Optional materials available for specific corrosive services (e.g., Hastelloy). Testing and Quality Assurance Each manifold is: Pressure tested at the factory Inspected for leakage and valve operation Supplied with test certificates (as required) Marked with model and serial number for traceability Packaging and Shipping Secured in protective packaging Includes: Product label & serial plate Installation instructions Valve operation guide Material and test certification (if requested) Available in single or bulk packaging Warranty Backed by the manufacturer’s standard warranty covering defects in material and workmanship for a defined period (typically 12 months or per contract terms).