Rosemount Integral and In-line Manifolds (R305 & R306)

Nov. 6, 2019

The Rosemount R305 Integral Manifolds and Rosemount R306 In-line Manifolds have been designed to offer significant user improvements on these basic functions.


The most important improvement for both manifolds is the new Pressure-Lock Valve design which simplifies high-pressure operation, increases safety, and enhances reliability.


Features include:

  • Two-piece stem does not rotate in the seat, providing solid closure with minimal wear.
  • Easy to turn while delivering positive shut-off.
  • Adjustable packing nut simplifies valve maintenance.
  • Back seating prevents blowouts for increased user safety.
  • Stem and bonnet threads are fully isolated from the process fluid to minimize potential corrosion.
  • Modular packing ensures only the stem and body are exposed to the process fluid.
  • Larger internal passages to enhance reliability.
  • Handles are removable to avoid tampering.

The Rosemount R305 is designed for both differential or gauge pressure applications and mounts directly to any Rosemount Coplanar Transmitter for a complete solution. This reduces the number of potential leak points by 50% compared to traditional bi-planar transmitter setups. 2, 3, and 5-valve configurations are available.


The Rosemount R306 is designed for in-line pressure transmitters for gauge or absolute pressure applications. When a Rosemount R305 or R306 is selected with a transmitter, the components are fully assembled and high-pressure leak tested at the factory. This allows the transmitter to be installed right out of the box, saving time and money.

Max. Operating Pressure6,250 psi (431 bar)10,000 psi (689 bar)
Max. Operating Temp.750°F (399°C)
Manifold Material316 SST/316L SST
Packing MaterialPTFE, Graphite-based
Process Connection1/2 to 14 in. NPT female
OrientationParallel with transmitter,
90-deg. to transmitter
Parallel with transmitter
CertificationsCleaning for special services, sour gas (meets NACE MR 0175/ISO 15156, MR0103)
WarrantyUp to 5-year limited warranty