Emerson Y696VR Instruction Manual

Instruction Manual
Form 5480

June 2009

Y696VR Series Vacuum Regulators

WARNING

!

Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,

re and/or chemical contamination

causing property damage andpersonal
injury or death.

Fisher® regulators must be installed,
operated, and maintained in accordance
with federal,state, and local codes, rules
and regulations, and Emerson Process
Management RegulatorTechnologies Inc.
instructions.

If the regulator vents gas or a leak
develops in the system, service to the
unit may be required. Failure to correct
trouble could result in a hazardous
condition.

Installation, operation, and maintenance

procedures performed by unqualied

personnel may result in improper
adjustment and unsafe operation. Either
condition may result in equipment

damage or personal injury. Use qualied

personnel when installing, operating, and
maintaining the Y696 Series regulator.

Introduction

Scope of Manual

This manual describes and provides instructions and
parts lists for the Type Y696VR and the Type Y696VRM
vacuum regulators. Instructions and parts lists for
other equipment used with these breakers are found in
separate manuals.

W7431

Figure 1. Type Y696VR Vacuum Regulator

Product Description

The Y696VR Series direct-operated vacuum regulators
are used for precise control of small capacity, low­pressure service applications where an increase in
vacuum must be limited. They are described as follows:

Type Y696VR—The Type Y696VR has internal pressure
registration requiring no downstream control line.

Type Y696VRM—The Type Y696VRM has a control
line connection and an O-ring stem seal blocking the
throat for external pressure registration.

Specications

Some general ratings and specications for the

Y696VR Series vacuum regulators are given on page 2.
Individual regulators from the factory are supplied with

the specic data stamped on the nameplate.

Y696VR Series

www.emersonprocess.com/regulators

D102662X012

Y696VR Series

Specications

Body Sizes and End Connection Styles

(1)

See Table 1

Maximum Allowable Emergency Inlet
(Casing) Pressure

(2)

±15 psig (±1,03 bar)

Maximum Allowable Pressure Without Internal
Parts Damage

(2)

±8 psig (±0,55 bar)

Maximum Downstream Pressure

(2)

Full Vacuum

Vacuum Control Pressure Ranges

(2)

See Table 2

Wide-Open Flow Coefcients

Cg: 515; Cv: 14.7; C1: 35

IEC Sizing Coefcients

XT: 0.78; FD: 0.67; FL: 0.89

Spring Case Connection

3/4 NPT

Control Line Connection Connection

1/2 NPT

Gauge Tap Connection

1/4 NPT

Pressure Registration

Type Y696VR: Internal
Type Y696VRM: External

Material Temperature Capabilities

(2)

Nitrile (NBR): -40° to 180°F (-40° to 82°C)
Fluorocarbon (FKM):

40° to 300°F (4° to 149°C)

Ethyleneproplyene (EPR):

-20° to 275°F (-29° to 135°C)

Peruoroelastomer (FFKM):

0° to 300°F (-18° to 149°C)

Silicone (VMQ): -40° to 400°F (-40° to 204°C)

Approximate Weights

Cast Iron:

45 pounds (20 kg)

Steel, Stainless Steel, or Hastelloy® C:

57 pounds (26 kg)

1. End connections for other than U.S. standards can usually be provided; consult the local Sales Ofce.

2. The pressure/temperature limits in this instruction manual and any applicable standard or code limitation should not be exceeded.

Table 1. Body Sizes and End Connection Styles

BODY SIZE,

NPS (DN)

1-1/2 (40)

2 (50)

1. All anges are welded on to the body and have a face-to-face dimension of 14-inches (356 mm).

Cast Iron Steel or Stainless Steel Hastelloy® C

NPT

CONSTRUCTION MATERIAL AND END CONNECTION STYLE

NPT, SWE, ANSI CL150 RF,

CL300 RF, or PN 16/25/40

Installation

WARNING

!

Personal injury, property damage,
equipment damage, or leakage due to
escaping gas or bursting of pressure­containing parts may result if this
equipment is overpressured or is
installed where service conditions could

exceed the limits given in specications,

or where conditions exceed any
ratings of the adjacent piping or piping
connections. To avoid such injury or
damage, provide pressure-relieving or

pressure-limiting devices (as required
by the appropriate code, regulation, or
standard) to prevent service conditions
from exceeding those limits. Additionally,
physical damage to this equipment could
cause personal injury or property damage
due to escaping gas. To avoid such injury
or damage, install the equipment in a safe
and well ventilated location.

Equipment operation within ratings does not preclude
the possibility of damage from debris in the lines or from
external sources. This equipment should be inspected
for damage after any overpressure condition.

ANSI CL150 RF

2

VACUUM BEING

CONTROLLED

HIGHER VACUUM SOURCE

VACUUM

PUMP

Figure 2. Type Y696VR Operational Schematic

CONTROL PRESSURE (VACUUM)
OUTLET PRESSURE (VACUUM)
ATMOSPHERIC PRESSURE

Note

Y696VR Series

condensation and clogging.

Principle of Operation

A vacuum regulator maintains a constant vacuum at
the regulator inlet. A decrease in vacuum (increase
in absolute pressure) below the setpoint registers
on the diaphragm and opens the disk. This allows
the pressure from the higher vacuum source to pass
through the regulator and restore the vacuum to its
original setting. On the Type Y696VR, the controlled
pressure registers directly into the diaphragm casing.
The Type Y696VRM has a control line connecting the
diaphragm casing to the vacuum being controlled and
an O-ring stem seal blocking the throat allowing for
registration only through the control line connection.

Startup and Adjustment

To place the vacuum regulator in operation, slowly
introduce inlet or vacuum pressure. The unit takes
control when vacuum is established. This unit operates
within the pressure range stamped on the closing cap.

If this equipment is shipped mounted on
another unit, install the unit according to
the appropriate instruction manual.

1. Only personnel qualied through training and

experience should install, operate, and maintain
this equipment. For Y696VR Series equipment
that is shipped separately, make sure that there is
no damage to or foreign material in it. Also ensure
that all tubing and piping have been blown free.

2. This equipment may be installed in any position

as long as the ow through the body is in the

direction indicated by the arrow cast on the body.
If continuous operation is required during inspection
or maintenance, install a three-valve bypass around
the equipment.

WARNING

!

This equipment may vent some gas
to the atmosphere. In hazardous or

ammable gas service, vented gas may

accumulate and cause personal injury,

death, or property damage due to re or

explosion. Vent equipment in hazardous
gas service to a remote, safe location away
from air intakes or any hazardous area.
Protect vent lines and stack openings from

Shutdown

To shutdown the unit, close the upstream shutoff valve
and then close the downstream shutoff valve to vent
the equipment properly. Next, open the vent valve
between the equipment and the nearest downstream
shutoff valve. All pressure between the shutoff valves
is released through the open vent valve.

Maintenance

Equipment parts are subject to normal wear and
must be inspected and replaced as necessary. The
frequency of inspection and replacement of parts
depends on the severity of service conditions and
upon applicable codes and government regulations.

WARNING

!

To avoid personal injury, property
damage, or equipment damage caused by
sudden release of pressure or explosion
of accumulated gas, isolate the regulator
and release internal pressure before
attempting maintenance or disassembly.

Body Area

3