Azbil RA1B User manual

CM2-RA1B10-2001
Pressure Regulator
with Air Filter
Model RA1B
User’s Manual

NOTICE
Please make sure that this manual is available to the user of the product.
Unauthorized duplication of this user’s manual in part or in whole is
forbidden. The information and specifications in this manual are subject to
change without notice.
Considerable effort has been made to ensure that this manual is complete
and accurate, but if you should find an omission or error, please contact us.
In no event is Azbil Corporation liable to anyone for any indirect, special, or
consequential damages as a result of using this product.
© 2022 Azbil Corporation. All Rights Reserved.

iii
■ The safety precautions explained below aim to prevent injury to you and others, and to prevent property damage.
WARNING Warnings are indicated when mishandling this product may
result in death or serious injury.
CAUTION Cautions are indicated when mishandling this product may
result in minor injury or property damage only.
■ In describing the product, this manual uses the icons and conventions listed below.
:Indicates that caution is required in handling.
:The indicated action is prohibited.
:Be sure to follow the indicated instructions.
Handling Precautions :Information to be aware of when handling.
Note :Indicates information that may be useful.
:Indicates an item or page to which the user may refer.
(1)(2)(3) :Steps in a sequence or parts of a figure, etc.
Conventions Used in This User’s Manual

iv
 General
WARNING
Before starting to work, check that the pressure in the pipes has dropped to atmospheric
pressure. If fluid spews out, injury may result.
 Installation
CAUTION
Do not stand on the device or use it as a step. There is a risk of falling.
Do not touch the device unnecessarily while it is operating. Depending on the operating
conditions, the surface might be extremely hot or cold.
Since this product is heavy, when handling it, wear safety shoes and watch your step.
During work, wear protective goggles to prevent injury from flying objects.
During work, wear protective gloves to prevent injury due to burrs on bolt heads or edges.
Handling Precautions

v
Thank you for purchasing the model RA1B pressure regulator with air filter.
 Unpacking and Storing the Product
z Unpacking
This device is a precision instrument. When unpacking, take special care in handling it to
prevent accidents, damage, etc. After unpacking, check for the following items.
• Pressure regulator
• User’s manual
z Checking the specifications
The nameplate on this device includes the model number and specifications. Check that
the model number and specifications are correct.
z Inquiries
For inquiries concerning this device, contact the azbil Group.
When making an inquiry, have your model number and product number ready.
z Precautions for storage
Observe the following precautions when storing the purchased device in an unused state.
• Store the product at normal room temperature and humidity in an indoor location that
is as free as possible from vibration and shock.
• Store the product in its original packaging.
To store a pressure regulator that has been used, follow the instructions below.
(1) Clean the pipe threads and the inside of the drain bowl to remove any dirt and then
dry them.
(2) Seal this device in a clean plastic bag with desiccant to prevent moisture from entering
the device.
(3) Place the device back in its original packaging.
(4) Store it at normal room temperature and humidity in an indoor location that is as free
as possible from vibration and shock.
Introduction

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This manual explains the structure of this device and its uses in the following order.
Chapter 1 Overview
Structure and operating principles
Chapter 2 Installation
How to install this device and points to keep in mind during installation
Chapter 3 Operation
Procedures and important points for operating and stopping this device
Chapter 4 Maintenance
Maintenance procedures and service parts
Structure of This User’s Manual

vii
Conventions Used in This User’s Manual
Handling Precautions
Introduction
Structure of This User’s Manual
Chapter 1 Overview 1
Overview 1
Structure 1
Operating Principles 2
Chapter 2 Installation 3
Description of Parts 3
Instrumentation Air 5
Installation Procedure 6
Chapter 3 Operation 9
How to Start Operation 9
How to Stop Operation 9
How to Adjust the Pressure 9
Chapter 4 Maintenance 13
Drain 13
Filter Maintenance 14
Ordering Parts 14
Storage 15
Disposal 15
Other 16
Appendix A App.1
Contents

1
Chapter 1 Overview
 Overview
The pressure regulator with air filter supplies the secondary side with a constant air
pressure regardless of changes in primary pressure or secondary-side load resistance.
In addition, it has a built-in filter to remove solid foreign matter.
 Structure
(3)
(4)
*
(22)
(21)
(19)(20)
(18)
(11)
(5)
(6)
(7)(7)
(8)
(9)
(10)
(15)
(16)(17)
(13)(14)
(12)
(1)(2)
* Bleed hole (actual position may dier)
** Retaining mechanism
**
(1) removed
Primary
side
Secondary
side
Fig. 1-1. RA1B-1
*
(23)
(2)(24)(25)
(26)
**
Fig. 1-2. RA1B-2, RA1B-3

2
Chapter 1 Overview
Table 1-1. RA1B standard specifications — Main materials
No. Name Material No. Name Material
1 Cover screw (M6) Stainless steel 14 Filter PVA resin
2 O-ring VMQ 15 Drain bowl Aluminum alloy
3 Screw (M4) Stainless steel 16 Drain plug (M5) Stainless steel
4 Bonnet Aluminum alloy 17 O-ring VMQ
5 Slotted screw (M6) Stainless steel 18 Valve Stainless steel
6 Pressure adjustment
spring receiver
Plated steel plate 19 Intake port Copper alloy
7 Pressure adjustment
spring
Spring steel 20 O-ring VMQ
8 Screw (M5) Stainless steel 21 Exhaust pipe Copper alloy
9 Diaphragm CR (inserted into base
fabric)
22 Pressure-receiving plate Stainless steel
10 Main unit Aluminum alloy 23 Pressure adjustment knob PBT resin, stainless steel
11 Pressure adjustment
spring
Spring steel 24 Flange nut (M6) Stainless steel
12 Pressure adjustment
spring receiver
Plated steel plate 25 Flat washer Stainless steel
13 Gasket NBR 26 Plug (only for OUT2) Stainless steel
 Operating Principles
As shown by the arrows, air from the primary side passes through the filter (14), where
solid foreign matter is removed.
Until the secondary pressure balances the force of the pressure adjustment spring (7) and
closes the valve (18), air continues to flow into the secondary side. When the secondary
pressure exceeds the specified pressure, the diaphragm (9) rises to release excess air
through the openings in the valve (18) and diaphragm (9) and the bleed hole in the side of
the bonnet (4).