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.

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

 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

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

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

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

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).

Table of contents

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