Rosemount 305 Integral Traditional Manifold

The Rosemount 305 Integral Traditional Manifold is a compact, direct-mount coplanar instrument manifold designed for seamless integration with Rosemount Coplanar™ pressure transmitters. The manifold eliminates the need for a separate flange adapter by mounting directly to the transmitter sensor module, reducing potential leak points and simplifying installation.

Engineered for high-pressure and high-temperature service, the 305 Integral Manifold provides reliable isolation, equalization, and venting functions in pressure and differential pressure measurement systems. Its rugged construction and Pressure-Lock™ valve design ensure long service life, enhanced operator safety, and dependable performance in demanding industrial environments.

Technical Specifications for Rosemount 305 Integral Traditional Manifold

Valve Configuration

• Available in 2-valve, 3-valve, and 5-valve configurations
  • 2-valve: Isolation and vent
  • 3-valve: Isolation and equalization
  • 5-valve: Isolation, equalization, and vent

Pressure Rating

• Maximum operating pressure: Up to 6,000 psi (414 bar) typical
• Designed to meet applicable ANSI/ASME pressure class ratings

Temperature Rating

• Maximum operating temperature: Up to 750°F (399°C) with graphite packing
• Lower temperature ratings applicable when PTFE packing is selected

Materials of Construction

• Body material: 316 / 316L stainless steel (standard)
• Optional materials: Alloy options available for corrosive or sour service
• Valve stem packing: PTFE or graphite

Process Connections

• ½–14 NPT female standard inlet/outlet
• Coplanar direct-mount interface to compatible transmitters
• Parallel or 90° orientation options

Design & Construction

• Pressure-Lock™ valve stem design for enhanced safety
• Blowout-resistant stem
• Factory-assembled and leak-tested when ordered with compatible transmitter
• Large internal bore to reduce plugging potential

Compliance

• NACE-compliant materials available for sour gas service
• Suitable for hazardous and general industrial environments

Applications for Rosemount 305 Integral Traditional Manifold

The Rosemount R305 Integral Manifold is designed for use in industrial pressure measurement systems requiring reliable transmitter isolation and maintenance capability. Typical applications include:

• Differential pressure flow measurement systems
• Gauge and absolute pressure measurement installations
• Level measurement using differential pressure transmitters
• Steam, gas, and liquid service in high-pressure systems
• Oil & gas production and processing facilities
• Petrochemical and chemical plants
• Power generation facilities
• General industrial process control systems

The integral mounting design significantly reduces potential leak paths and simplifies field installation, making it ideal for both new installations and retrofit applications.

Features of Rosemount 305 Integral Traditional Manifold

• Direct Coplanar Mounting: Eliminates the need for separate flange adapters, reducing weight and leak points
• Reduced Leak Paths: Up to 50% fewer potential leak points compared to traditional manifold/flange assemblies
• Pressure-Lock™ Valve Technology: Two-piece stem design improves safety and reliability
• Multiple Valve Options: Flexible configurations for isolation, equalization, and venting
• High Pressure & Temperature Capability: Suitable for severe service applications
• Corrosion Resistance: Stainless steel construction with optional alloy materials
• Factory Leak Tested: Ensures integrity and measurement reliability
• Compact & Lightweight Design: Simplifies installation and maintenance