Rosemount 304 Conventional Manifold

The Rosemount 304 Conventional Manifold is a robust, field-proven instrument manifold designed for isolation, equalization, and venting of pressure and differential pressure transmitters. Engineered for conventional flange-mounted transmitter installations, the manifold provides a reliable interface between the process and the measurement instrument.

Constructed from high-quality materials and designed for high-pressure service, the Rosemount 304 manifold enables safe transmitter maintenance, calibration, and commissioning without process interruption. Its compact design, durable valve assemblies, and precision machining ensure long-term reliability in demanding industrial environments.

Technical Specifications of Rosemount 304 Conventional Manifold

Valve Configuration

• Available in 2-valve, 3-valve, and 5-valve configurations:
  • 2-valve: Isolation and vent (gauge pressure applications)
  • 3-valve: Two isolation valves and one equalization valve (differential pressure)
  • 5-valve: Two isolation valves, one equalization valve, and two vent/test valves

Pressure Rating

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

Temperature Rating

• Operating temperature: Up to 750°F (399°C) with graphite packing
• Lower temperature limits apply when PTFE packing is selected

Materials of Construction

• Body material: 316 / 316L stainless steel (standard)
• Optional materials available for corrosive or sour service
• Valve stem packing: PTFE or graphite
• Blowout-resistant valve stems for enhanced safety

Process Connections

• ½–14 NPT female standard inlet/outlet
• Flange-mounted interface to pressure transmitters
• Threaded and optional flanged process connections available

Design Features

• Precision-machined body for reliable sealing
• Non-rotating valve stems to reduce packing wear
• Factory pressure tested
• Large internal bore to reduce plugging risk

Compliance

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

Applications for Rosemount 304 Conventional Manifold

The Rosemount 304 Conventional Manifold is designed for use in pressure measurement systems requiring dependable isolation and maintenance capability. Typical applications include:

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

The manifold enables safe transmitter removal, zeroing, and calibration while maintaining process containment.

Features of Rosemount 304 Conventional Manifold

• Conventional Flange Mounting: Compatible with traditional flange-mounted transmitters
• Multiple Valve Configurations: 2-, 3-, and 5-valve options to suit application requirements
• High Pressure Capability: Designed for demanding process conditions
• Blowout-Resistant Stems: Enhanced operator safety during operation
• Durable Construction: Stainless steel body for corrosion resistance and long service life
• Easy Maintenance: Provides safe isolation and equalization for calibration and servicing
• Factory Pressure Tested: Ensures integrity before installation
• Versatile Application Range: Suitable for liquid, gas, and steam services