Valve Configuration - Emerson Rosemount 304 Product Data Sheet

August 2016

Valve configuration

Block-and-bleed
The block-and-bleed configuration is available on the Rosemount
306 Manifold for use with in-line gage and absolute pressure
transmitters. A single isolate valve provides instrument isolation
and a bleed screw provides drain/vent capabilities.
Rosemount 306 Manifold
Transmitter
Isolate
Process
Two-valve
The 2-valve configuration is available on Rosemount 305, 306, and
304 Manifolds for use with absolute and gage pressure
transmitters. An isolate valve provides instrument isolation and a
drain/vent valve allows venting, draining, or calibration.
Rosemount 305 and 306 Manifolds
Transmitter
Isolate
Process
Rosemount 304 Manifold
Transmitter
(plugged)
Isolate
Process
EmersonProcess.com/Rosemount
Bleed screw
Vent
Vent
Three-valve
The 3-valve configuration is available on Rosemount 305 and 304
Manifolds for use with differential pressure and multi-variable
transmitters. Two isolate valves provide instrument isolation, and
one equalize valve is positioned between the high and low process
connections.
Rosemount 305 Manifold
Transmitter
Drain/vent
Equalize
Isolate
Process
Rosemount 304 (Traditional) Manifold
Transmitter
(plugged)
Equalize
Isolate
Process
Rosemount 304 (Wafer) Manifold
Transmitter
Equalize
Isolate
Process
Note
Vent ports receive plastic caps to protect threaded
connections unless otherwise noted.
Note
Plugged connections receive
otherwise noted.
Rosemount Manifolds
Drain/vent
Isolate
(plugged)
Isolate
Isolate
/ -in. NPT plugs unless
1
4
3