1. General Information:
1.0 Introduction
The following instructions are designed to assist maintenance
personnel in performing most of the maintenance required on
the 171 & 172 Series regulators and if followed carefully will
reduce maintenance time.
Masoneilan has highly skilled Service Engineers available for
start-up, maintenance and repair of our regulators and compo-
nent parts. In addition, regularly scheduled training programs
are conducted to train customer service and instrumentation
personnel in the operation, maintenance and application of
our control valves, regulators and instruments. Arrangements
for these services can be made through your Masoneilan
Representative or District Office. When performing main-
tenance use only Masoneilan replacement parts. Parts are
obtainable through your local Masoneilan Representative or
District Office. When ordering parts always include
MODEL
and
SERIAL NUMBER
of the unit being repaired.
2. Transport, Storage and Handling
Transport
Depending on their size, regulators can be transported loose,
packed in cardboard boxes or in wooden crates.
All the regulator ends are fitted with covers to prevent dirt from
entering. Packs can be placed on pallets if required. Follow all
and any indications written on the packaging.
Operators moving loads must take all necessary precautions
to prevent accidents.
Storage
Regulators must be kept in a dry place to protect them from
atmospheric conditions. They may only be removed from their
crates or packing immediately prior to installation.
The end protections and covers must be kept on until the last
moment. Regulators, whether packed or not, must not be
subject to violent knocks. Regulators, whether packed or not,
must always be kept upright, that is, never lying on one side,
in order to prevent distortion and damage to internal parts.
Handling
When unpacking the regulators and removing the end protec-
tors immediately prior to installation, take great care to make
sure that foreign bodies do not enter the regulator inlet and
outlet holes while it is being connected.
When handling the regulator, make sure the work area
is kept clear in order to prevent injury to people and damage
to property.
2
Instructions
EY0171-0172 – 10/08
171 and 172 Series
Self-Operating Pressure Regulators
1st
1
2nd
7
3rd
2
1st
X
2nd
X
3rd
X
4th
X
Option
X
Regulator Series
Action
1 Reducing
Metal Seat
2 Reducing
Soft Seat
Action
50 Differential
Pressure
Diaphragm
1 Metal
Diaphragm
2 Elastomeric
Diaphragm
Trim Size
01
02
03
04
05
06
08
10
12
14
16
18
20
22
DV-215-171_172 series Inst-v13.indd 2
11/5/08 12:13:37 PM