Azbil VDC Bedienungsanleitung

Diaphragm Control Valve

Model: VDC, VAC, VST,VAA

ANSI Class 600 or under

User’s Manual

OM2-8110-0300

13th edition

While this information is presented in good faith and believed to

be accurate, Azbil Corporation disclaims the implied warranties of

merchantability and tness for a particular purpose and makes no

express warranties except as may be stated in its written agree-

ment with and for its customer.

In no event is Azbil Corporation liable to anyone for any indirect,

special or consequential damages. This information and speci-

cations in this document are subject to change without notice.

Model MTG11A/18A, MTG11B/18B, MTG14C i

Safety Guide

1 : Nomenclature of parts

Diagrams with the control valve terminologies and words used in this manual are

shown below. Please familiarise yourself with these denitions before using the

device.

Diaphragm

Yoke

Bonnet

Valve body

Flange

Actuato

Figure S-1 Nomenclature of globe valve

Body

Valve body

(Vane or disk)

Link

Actuato

Figure S-2 Nomenclature of buttery valve

Safety Guide Azbil Corporation

ii Model MTG11A/18A, MTG11B/18B, MTG14C

2 : Safety precautions

Please read this section before using the valve to ensure proper handling.

WARNING

If the stated procedures are not followed as specied, a potentially hazardous situation

may arise, which could result in death or serious injury.

CAUTION

Failure to observe these cautions may create dangerous conditions that could result in

injury to the personnel and/or in physical damage to the device.

3 : Verication of Valve Specications and Precautions on Storage

3-1 : Unpacking

Control valve is a precision equipment. Handle it with care to avoid damaging it.

When unpacking, check that the following items are in the crate:

• Main valve body, actuator and accessories as ordered,

• Additional equipment as ordered. Installation options

3-2 : Verication of specications

Please check and see if that the process ow uid conditions, and valve Tag No.

agree with the specications that were ordered. The nameplate of each product are

found as shown below. (Other products have their nameplates attached to the identical

positions.)

Figure S-3 Position of nameplate on V Series

Azbil Corporation Safety Guide

Model MTG11A/18A, MTG11B/18B, MTG14C iii

Compliance with Regulations

This product complies with the directive below.

• Pressure Equipment Directive (PED) 2014/63/EU

Requirements for workers (installation, operation, maintenance)

To ensure safety, only specialists who are skilled in instrumentation work should

carry out the installation, operation, and maintenance of this device.

Cautions on storage

When storing the control valve, pay attention to the following precautions:

• A control valve that has been packed in a cardboard box should be stored indoors

at normal temperature and humidity.

• A control valve that has been packed in a wooden crate should be stored indoors

at normal temperature and humidity as a rule. In the event outdoor storage, open

the crate, verify the specications of the unit and cover it with a polyethylene

protective sheet to guard against precipitation.

• When storing a used valve, follow the procedures described below:

(1) Flush out the process uid from inside the valve body and dry,

(2) When there is a possibility of the valve body rusting, preservation treatment

should be given,

(3) To prevent water from getting into the instrument, cover pneumatic tubing

connection and electric connector with watertight caps or tape. Also, protect

the connector threads,

(4) Place a ange cap onto the end of the pipe connecting surface (ange face,

butt welding connections) to avoid any possible damage.

Safety Guide Azbil Corporation

iv Model MTG11A/18A, MTG11B/18B, MTG14C

4 : Installation

4-1 : Installation environments

CAUTION

• Ensure sucient space for easy and

safe operation and maintenance of

the control valve.

• Avoid installing the valve in a

location where vibration or external

stress may impair proper valve

functions. If necessary, make

appropriate provisions against these.

• Consider providing a support for

the valve, so that the process piping

is not burdened with the excessive

weight of valve, or provide supports

on the upstream and downstream

pipe runs.

• Provide a cover or protective fence

around the valve installation, when

a valve is installed facing a path

or if physical contact with valve is

expected.

• Do not install a valve where it is

submerged under the water, or snow or freezing may take place.

• Provide a wall for protection against heat radiation.

• Provide measures to protect the valve against salt spray or corrosive atmosphere.

• To stop operation of the Flowmeter:

- Switch the control equipment connected to the owmeter to manual control.

- To turn the power to the converter o.

CAUTION

• In order to guard against accident while handling the valve, always wear safety

gloves, goggles and safety shoes.

Pipe support

Maintenance space

Azbil Corporation Safety Guide

Model MTG11A/18A, MTG11B/18B, MTG14C v

Prior to installation work, follow the items of caution as described below:

CAUTION

• Check and conrm that there is no external

damage to the valve (body, actuator,

accessories).

• Check and conrm that there is no damage

on pipe connecting anges or butt welding

connections.

• Ensure that the temperature of welded part

of pipe has been reduced before proceeding.

• Make sure that the anges on pipe have been

chamfered.

• Remove dust, sand, welding spatter or any

other foreign matter from the pipe and

clean out pipe. Any foreign matter will

damage the valve seat and reduces shut-o

characteristics.

• Ensure that upstream and downstream pipe

supports are suciently strong. Otherwise,

the valve's weight may cause leakage from

ange connections.

Scar

Dirt, sand

WARNING

• Operation of valve over and beyond the

rated pressure or connection other than

recommended of specied connection may

cause damage or leakage which may result

in serious injury.

Safety Guide Azbil Corporation

vi Model MTG11A/18A, MTG11B/18B, MTG14C

4-2 : Installation work

CAUTION

• Ensure that centers of upstream and downstream pipes are aligned when pipe

installation has been completed. Any mis-alignment of pipe will distort the valve

and will cause leakage from the connections. (Gasket)

• Make sure that the face to face dimension of pipe anges is equal to face to face

dimension of valve body plus gasket thickness.

• When installing a buttery valve on a pipe, keep the valve body (vane or disk) in

the fully closed position. When lifting a valve using the eyebolts on the actuator,

make sure that the rated weight of the bolt does not exceed the limit given in

the instruction manual. A load in excess of the limitation will cause damage to

actuator or will result in air leakage.

• Use proper gaskets for pipe anges. Otherwise, process uid may leak. Always

use new gaskets for pipe anges that will meet process uid specications,

temperature and pressure

conditions. Otherwise

process uid leakage

may occur.

• When ushing pipes,

keep valve in the fully

open position and do not

stroke valve. Welding

spatter or foreign matter

may damage valve.

WARNING

When installing a valve on

a pipe, keep hands and feet

away from valve body's

bottom or from between

anges to avoid physical

injury.

When reinstalling the

valve after inspection,

maintenance or

modication, ush out

process uid remaining in

the pipe or replace it with

safer liquid.

Weight

limit

Tighten diagonally

Azbil Corporation Safety Guide

Model MTG11A/18A, MTG11B/18B, MTG14C vii

4-3 : Pneumatic piping and electric work

CATUTION

• Pneumatic tubing should be sized so as not to

cause dropping of air pressure when the control

valve is in operation. Pneumatic tubing should

have an allowance in bend (use specialized

tool) and the parallel tubing should be clamped

together.

• Only qualied persons should do electrical

work in accordance to electrical facility

engineering standards.

• Cable connections should be made to conform

to the facility's conditions. A suitable adaptor

or packing should be selected to suit the outer

dimension of the completed installation.

• When using seal tape on pneumatic tubing, do

not apply tape on the rst two threads from

the tip of connector. This may block the air

passage and cause malfunction of the valve.

• When using liquid packing (seize lock) on

pneumatic tubing, care should be exercised

so the liquid does not leak into tubing. It

may block the air passage, resulting in valve

malfunction.

• Avoid electrical work in rainy weather or at a

time of high humidity. Any intrusion of water

into connector or terminal will cause rusting

and electrical leakage.

• Covers of accessories such as the positioner are

provided with a seal packing (gasket). Exercise

care so as not to misplace or lose them while

electrical work is in progress.

• Exercise care so as not to lose xing screws

of accessories such as the positioner. When

tightening screws, ensure that packing is in

place and tighten screws with an even torque.

• Cable threads and conduit seal should be

tightened so as to ensure that water does not

get in.

Seal

tape

Two threads

Liquid run

Positioner

Safety Guide Azbil Corporation

viii Model MTG11A/18A, MTG11B/18B, MTG14C

5 : Caution on disassembly and reassembly

5-1 : Disassembly

CATUTION

• When disassembling a spring-

incorporated positioner, follow the

prescribed procedure in removing

bolts and nuts. Otherwise, the spring

may pop out and could resulting in

physical injury.

• When the eye-bolts of actuator are

used to lift the valve from the pipe,

ensure that the weight limit given

in manual is adhered to. Otherwise,

there is the danger of dropping the

valve,

• When removing the trim (inner

valve) from the body, ensure that

the proper type of specialized tool is

used. Refer to the instruction manual

for the tools that should be used.

Otherwise, the trim may be damaged.

Eye bolt

Spring

HTS

2-inch

Specialized

tool

Weight

limit

Suspending

Stop

valve

Reducing

valve

Close Open

WARNING

• Before disassembling the valve,

ensure that the pressure within piping

has been reduced to atmospheric

pressure. Flow out of process uid

may cause physical injury.

• When disassembling the valve,

ush out the interior of the valve

or replace the uid inside. Residual

process uid may cause physical

injury,

• Do not disassemble the pneumatic

actuator with supply air on.

Compressed air may cause physical

injury.

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