Emerson Fisher T205VB Series Instruction Manual

Instruction Manual
D103759X012
July 2019
T205VB Series Vacuum Breakers

Table of Contents

Introduction .................................................................. 1
Specifications .............................................................. 2
Principle of Operation .................................................. 2
Installation ................................................................... 5
Startup, Adjustment and Shutdown ............................. 5
Maintenance ................................................................ 6
Parts Ordering ............................................................. 9
Parts List...................................................................... 9

Introduction

Scope of the Manual
This Instruction Manual provides instruction for
installation, startup, maintenance and parts lists for
Types T205VB and T205VBM vacuum breakers.
Instructions and parts lists for other equipment used
with these breakers are found in separate manuals.
Product Description
The T205VB Series vacuum breakers (Figure 1) are
used for precise control of small capacity, low-pressure
service applications where an increase
Figure 1. Typical Type T205VB Vacuum Breaker
in vacuum must be limited. These direct-operated
vacuum breakers are available in 3/4 and 1 in. / DN 20
and 25 body sizes and have 1/4 or 1/2 in. / 6.4 or
13 mm orifice.
The T205VB Series is available in two configurations:
Type T205VB for internal pressure registration
requiring no control line and Type T205VBM which
has a blocked throat and a control line connection for
external pressure registration.
T205VB Series