Emerson Fisher Y696VR Series, Fisher Y696VR, Fisher Y696VRM Instruction Manual

Instruction Manual
D102662X012

January 2019

Y696VR Series Vacuum Regulators

WARNING

!

Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
fire and/or chemical contamination
causing property damage and personal
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 Regulator
Technologies 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 unqualified
personnel may result in improper
adjustment and unsafe operation. Either
condition may result in equipment
damage or personal injury. Use
qualified 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,
low-pressure 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.

Y696VR Series

Y696VR Series

Specifications

Some general ratings and specifications for the Y696VR Series vacuum regulators are given on page 2. Individual
regulators from the factory are supplied with the specific data stamped on the nameplate.

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 Coefficients

Cg: 515
Cv: 14.7
C1: 35

IEC Sizing Coefficients

XT: 0.78;
FD: 0.67;
FL: 0.89

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.

Spring Case Connection

3/4 NPT

Control Line Connection

1/2 NPT

Gauge Tap Connection

1/4 NPT

Pressure Registration

Type Y696VR: Internal
Type Y696VRM: External

Material Temperature Capabilities

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
Perfluoroelastomer (FFKM): 0 to 300°F /

-18 to 149°C

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

Approximate Weights

Cast Iron: 45 lbs / 20 kg
Steel, Stainless steel, or Hastelloy® C: 57 lbs /

26 kg

(2)

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 in. / 356 mm.

Cast Iron Steel or Stainless Steel Hastelloy

NPT

CONSTRUCTION MATERIAL AND END CONNECTION STYLE

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

Hastelloy® C is a mark owned by Haynes International, Inc.

®

C

NPT, SWE, ANSI CL150 RF,

CL300 RF, or PN 16/25/40

ANSI CL150 RF

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.

2

Note

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

1. Only personnel qualified 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 flow 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
flammable gas service, vented gas may
accumulate and cause personal injury,
death, or property damage due to fire 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
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.

Y696VR Series

VACUUM BEING

CONTROLLED

HIGHER VACUUM SOURCE

VACUUM

PUMP

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

Figure 2. Type Y696VR Operational Schematic

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

!

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.

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.

3

Y696VR Series

Table 2. Vacuum Control Pressure Ranges and Spring Part Numbers

VACUUM CONTROL

PRESSURE RANGE

In. w.c. mbar In. w.c. mbar In. mm

(2)

1 to 3

(2)

1-1/2 to 5

(2)

3 to 8

8 to 16

16 to 32

0.25 to 3 psig

1. Pressure ranges are based on the spring case pointing up. Pointing the spring case down increases the pressure range 1.7 in. w.c. / 4 mbar.

Example: 1 to 3 in. w.c. / 2 to 7 mbar) changes to 2.7 to 4.7 in. w.c. / 7 to 12 mbar.

2. Do not use Fluorocarbon (FKM) diaphragm with these springs at diaphragm temperatures lower than 40°F / 4°C.

(1)

(2)

2 to 7
4 to 12
7 to 20

20 to 40
40 to 80

17 to 207

(2)

(2)

CHANGE IN VACUUM CONTROL

PRESSURE TO REACH WIDE-OPEN

1.5
2
3

4
7

1.2 psig

4
5
7

10
17
83

SPRING

PART NUMBER

1D892527022
1D7654000A2
0B0197000A2

1B766627062
1B883327022
1A630627022

SPRING COLOR

Brown

Unpainted

Purple

Gray

Unpainted

Black

WIRE DIAMETER

0.109

0.120

0.148

0.156

0.187

0.275

SPRING

2.8

3.1

3.8

4.0

4.8

7.0

Body Area

These procedures are for gaining access to the disk
assembly, orifice, and body gasket. All pressure must
be released from the diaphragm case before the
following steps can be performed. Key numbers are
referenced in Figure 3.

1. To inspect and replace the disk holder assembly
(key 25), remove the body cap assembly (key 38).

2. If it is necessary to replace the disk holder
assembly (key 25), remove the machine screw
(key 47) and cotter pin (key 14) from the disk stem
(key 40).

3. To inspect and replace the orifice (key 27),
loosen the union nut (key 19), tip the diaphragm
casing (key 20) toward the inlet, and separate the
diaphragm casing from the body (key 28).

4. Remove and inspect the body gasket (key 16).

5. Inspect and replace the orifice (key 27) if necessary.
Lubricate the threads of the replacement orifice with
a good grade of pipe thread sealant and tighten
using 29 to 37 ft-lbs / 39 to 50 N•m of torque.

6. If necessary, install the replacement body gasket
(key 16) into the body (key 28).

7. Slide the union nut (key 19) as far as it will go
onto the diaphragm casing (key 20). Install both
halves of the split ring (key 17) into the slots of the
diaphragm casing (key 20) and secure them by
sliding the union nut down on the split ring.

8. Install the diaphragm casing (key 20) by tightening
the union nut (key 19) until the diaphragm case is
secure on the body (key 28).

9. The disk holder assembly (key 25) consists of the
disk and disk holder, as well as the valve disk washer
(key 46) and the machine screw (key 47). Install the

disk spring (key 41) and valve holder assembly and
secure it to the disk stem (key 40) with the cotter pin
(key 14).

10. Use a good quality thread sealer when replacing
the body cap assembly (key 38).

Diaphragm and Spring Case Area

These procedures are for gaining access to the
control spring, diaphragm assembly, valve stem, and
stem O-ring. All pressure must be released from the
diaphragm case before these steps can be performed.
Key numbers are referenced in Figure 3.

Type Y696VR Vacuum Regulator

1. Remove the closing cap (key 3) and turn the
adjusting nut (key 2) counterclockwise until all
compression is removed from the control spring
(key 1). If the only further maintenance is to
change the control spring (key 1), skip to step 10.

2. Remove the screws (key 21) and hex nuts (key 22)
and lift off the spring case assembly (key 23).

3. Remove the diaphragm (key 5) and attached
parts by tilting it so that the pusher post (key 8)
slips off the lever assembly (key 9). To separate
the diaphragm (key 5) from the attached parts,
unscrew the diaphragm hex nut (key 37). If
the only further maintenance is to replace the
diaphragm parts, skip to step 8.

4. To replace the lever assembly (key 9), remove the
machine screws (key 11).

5. To replace the valve stem (key 13) pull it out of the
diaphragm casing (key 20) and install a new valve
stem by pushing it into the diaphragm casing.

4

Y696VR Series

Table 3. Disk Holder Assembly Materials and Part Numbers (key 25)

TRIM MATERIAL DISK MATERIAL DISK ASSEMBLY

303 Stainless steel (standard) Nitrile (NBR) 1D6405000D2

316 Stainless steel Peruoroelastomer (FFKM) Disk: 1D6404X0022, Disk Holder: 1D6403X0032

®

N10276 Hastelloy

316 Stainless steel (NACE)

C Polytetrauoroethylene (PTFE) 1D6405X0152

Nitrile (NBR)

Fluorocarbon (FKM)

Peruoroelastomer (FFKM)

PTFE

Ethylenepropylene (EPR)

Table 4. Body Materials and Part Numbers (key 28)

Disk: 1D6404X0022, Disk Holder: 1D6403X0012

1D6405X0202
1D6405X0212

1D6405X0162
1D6405X0122

BODY SIZE AND

END CONNECTION STYLE

1-1/2 in./

DN 40

2 in. /

DN 50

CL150 RF - - - - 22B4316X022 22B4316X012 22B4316X032 - - - -

CL150 Integral RF - - - - - - - - 44B9592X022 - - - - 44B9592X012

CL300 RF - - - - 23B0825X012 23B0825X022 23B0825X042 - - - -

PN 16/25/40 - - - - 14B3341X032 14B3341X052 14B3341X112 - - - -

CL150 RF - - - - 22B9226X022 22B9226X012 14B3341X092 - - - -

CL150 Integral RF - - - - - - - - 44B9593X022 - - - - 44B9593X012

CL300 RF - - - - 14B3341X012 14B3341X022 14B3341X102 - - - -

PN 16/25/40 - - - - 14B3341X042 14B3341X062 14B3341X122 - - - -

NPT 1B403419012 2P2573X0022 2P2573X0012 - - - - - - - -

SWE - - - - 2P9004X0022 - - - - - - - - - - - -

NPT 1B403519012 2R140522012 2R1405X00A2 - - - - - - - -

SWE - - - - 22A2572X032 - - - - - - - - - - - -

Cast Iron WCC Steel

6. Install the lever assembly (key 9) on the valve
stem (key 13) and secure the lever assembly
(key 9) with the machine screws (key 11).

7. Install the diaphragm head gasket (key 7), lower
diaphragm head (key 24), diaphragm (key 5),
and upper diaphragm head (key 6) on the pusher
post (key 8) and attach with the hex nut (key 37).
Tighten using 30 to 45 ft-lbs / 41 to 61 N•m
of torque.

8. Install the pusher post (key 8) plus attached
diaphragm parts onto the lever assembly (key 9).

9. Install the spring case assembly (key 23) and control
spring (key 1) on the diaphragm casing (key 20)
so that the vent assembly is correctly oriented,
and secure them with the spring case cap screws
(key 21) and hex nuts (key 22), finger tight only.

10. Install the upper spring seat and the adjusting nut
(key 2) turning clockwise until there is enough
control spring force to provide proper slack to the
diaphragm (key 5) and attached parts. Using a
crisscross pattern, finish tightening the spring case
cap screws (key 21) and hex nuts (key 22) using

MATERIAL

CF8M

Stainless Steel

WCC Steel (NACE) Hastelloy

®

C

55 to 75 in-lbs / 6 to 8 N•m of torque. Then finish
turning the adjusting nut (key 2) to the desired
outlet pressure setting.

11. Install a replacement closing cap gasket (key 35) if
necessary, and then install the closing cap (key 3).

Type Y696VRM Vacuum Regulator

1. Remove the closing cap (key 3) and turn the
adjusting nut (key 2) counterclockwise until all
compression is removed from the control spring
(key 1). If the only further maintenance is to change
the control spring (key 1), skip to step 10.

2. Remove the spring case cap screws (key 21) and
hex nuts (key 22) and remove the spring case
(key 23).

3. Remove the diaphragm (key 5) and attached
parts by tilting it so the pusher post (key 8) slips
off the lever assembly (key 9). To separate the
diaphragm (key 5) from the attached parts, unscrew
the diaphragm hex nut (key 37). If the only further
maintenance is to replace the diaphragm parts or
change the control spring (key 1), skip to step 8.

Hastelloy® C is a mark owned by Haynes International, Inc.

5

Y696VR Series

4. To replace the lever assembly (key 9), remove the
machine screws (key 11) and lever pin.

5. To replace the valve stem (key 13) or stem seal
O-ring (key 15) remove the valve stem from the
diaphragm casing.

6. Lightly grease the new stem seal O-ring (key 15)
and install on the valve stem (key 13). Install the
valve stem by pushing it into the diaphragm casing
(key 20).

7. Install the lever assembly (key 9) on the valve
stem (key 13) and secure the lever assembly
(key 9) with the machine screws (key 11).

8. Install the diaphragm head gasket (key 7), lower
diaphragm head (key 24), diaphragm (key 5),
and upper diaphragm head (key 6) on the pusher
post (key 8) and attach with the hex nut (key 37).
Tighten using 30 to 45 ft-lbs / 41 to 61 N•m
of torque.

9. Install the pusher post (key 8) plus attached
diaphragm parts onto the lever assembly (key 9).

10. Install the spring case assembly (key 23) and control
spring (key 1) on the diaphragm casing (key 20)
so that the vent assembly is correctly oriented, and
secure them with the spring case cap screws (key 21)
and hex nuts (key 22), finger tight only.

11. Turn the adjusting nut (key 2) clockwise until there
is enough control spring (key 1) force to provide
proper slack to the diaphragm (key 5) and attached
parts. Using a crisscross pattern, finish tightening
the spring case cap screws (key 21) and hex nuts
(key 22) using 55 to 75 in-lbs / 6 to 8 N•m of torque.
Then finish turning the adjusting nut (key 2) to the
desired outlet pressure setting.

12. Install a replacement closing cap gasket (key 35) if
necessary, and then install the closing cap (key 3).

Parts Ordering

When corresponding with the local Sales Ofce or

about this regulator, include the type number and all
other pertinent information stamped on the closing
cap or nameplate. Specify the eleven-character part
number when ordering new parts from the following
parts list.

Parts List

Key Description Part Number

1 Spring

1 to 3 in. w.c. / 2 to 7 mbar 1D892527022
1-1/2 to 5 in. w.c. / 4 to 12 mbar 1D7654000A2
3 to 8 in. w.c. / 7 to 20 mbar 0B0197000A2
8 to 16 in. w.c. / 20 to 40 mbar 1B766627062
16 to 32 in. w.c. / 40 to 80 mbar 1B883327022

0.25 to 3 psig / 17 to 207 mbar 1A630627022
2 Adjusting Nut 1A201914012
3 Closing Cap 1L928308012
4 Lower Spring Seat 1U226019012
5* Diaphragm

Nitrile (NBR) 0R032502052
Fluorocarbon (FKM) 0R0325X0032
Ethylenepropylene (EPR) 0R0325X0062

Silicone 0R0325X0082
6 Upper Diaphragm Head 0B006628982
7* Diaphragm Head Gasket 1L143403022
8 Pusher Post

Stainless steel 0Y096435072

Hastelloy® C 0Y0964X0012
9 Lever Assembly

Stainless steel 1E3409X0052

Hastelloy® C 1E3409X0022
11 Machine Screw (2 required)

Stainless steel (standard) 1A866935032

Stainless steel (NACE) 1A8669X0012

Hastelloy® C 1A8669X0022
13 Valve Stem

Stainless steel (NACE) 1A630935032

Hastelloy® C 1A6309X0022
14 Cotter Pin

Stainless steel (Standard) 1A866537022

Stainless steel (NACE) 1A8665X0032

Hastelloy® C 14B7990X012
15* O-ring (Stem Seal for Type Y696VRM only)

Nitrile (NBR) 1E472706992

Fluorocarbon (FKM) 1N430406382

Ethylenepropylene (EPR) 1D6875X0032

Perfluoroelastomer (FFKM) 1D6875X0082
16* Body Gasket 1A348004032
17 Split Ring 0Y095828982
19 Union Nut

Cast iron body 0Z017619062

WCC steel body 0Z017624092

CF8M Stainless steel body 0Z0176X0012

Hastelloy® C 0Z0176X0012
20 Diaphragm Casing

Type Y696VR

Cast iron 3B973519012
WCC Steel

Standard 3F191622012

NACE 3F1916X0022
CF8M Stainless steel 3F191633092
Hastelloy® C 3F1916X0102

20 Diaphragm Casing (continued)

Type Y696VRM

WCC Steel 39A7502X022
CF8M Stainless steel 39A7502X012
Hastelloy® C 39A7502X032

21 Cap Screw (12 required)

Standard 1B136324052
NACE 1B136338992

22 Hex Nut (12 required)

Standard 1A309324122
NACE 1A309338992

*Recommended Spare Parts.
Hastelloy® C is a mark owned by Haynes International, Inc.

6

Y696VR Series

A7175

TYPE Y696VR ASSEMBLY

Figure 3. Types Y696VR and Y696VRM Vacuum Regulator Assemblies

23 Spring Case

Cast iron 2B155719042
WCC Steel 34B2157X012
CF8M Stainless steel 34B2157X042

Aluminum AE6180X0012
24 Lower Diaphragm Head 1A3478X0022
25 Disk Holder Assembly See Table 3
27 Orifice

303 Stainless steel (standard) 0L025335032

S316 Stainless steel (NACE) 0L0253X0042

Hastelloy® C 0L0253X0032
28 Body See Table 4
29 Pipe Plug (not shown), use with Y696VR

Cast iron and WCC spring cases 1C333528992

CF8M Stainless steel spring case 1C3335X0022
35* Closing Cap Gasket 1N446206992
36 Adjusting Stem 1A626314012
37 Diaphragm Hex Nut 1A499724122
38 Body Cap Assembly

Stainless steel (standard) 15A2185X022

Stainless steel (NACE) 15A2185X012

Hastelloy® C 15A2185X042
40 Disk Stem

Stainless steel (standard) 0L025135032

Stainless steel (NACE) 0L0251X0022

Hastelloy® C 0L0251X0012

Key Description Part NumberKey Description Part Number

41 Valve Spring

303 Stainless Steel (standard) 0D002827022
316 Stainless Steel (NACE)

or Hastelloy® C 10B6027X012

44 Upper Spring Seat

1 to 3 in. w.c. / 2 to 7 mbar 1A869524092
1-1/2 to 5 in. w.c. / 4 to 12 mbar 1A869524092
3 to 8 in. w.c. / 7 to 20 mbar 1A869524092
8 to 16 in. w.c. / 20 to 40 mbar 1A869524092
16 to 32 in. w.c. / 40 to 80 mbar 1A626424092

0.25 to 3 psig / 17 to 207 mbar 1A626424092

46 Valve Disk Washer

Standard Trim 0X014635032
NACE Trim 0X0146X0012

Hastelloy® C 0X0146X0022
47 Machine Screw 1A866435042
50 Nameplate (not shown) - - - - - - - - - - ­51 Drive Screw (not shown) 1A368228982
56 Vent Assembly (not shown), Y602-11 17A5515X012
71 Pipe Bushing (not shown) 1A3424X0042
95 NACE Tag (not shown) 19A6034X012
96 Tag Wire (not shown) 1U7581X0022

*Recommended Spare Parts.
Hastelloy® C is a mark owned by Haynes International, Inc.

7

Y696VR Series

A7176

TYPE Y696VRM BODY AND STEM ASSEMBLY DETAIL

Figure 3. Types Y696VR and Y696VRM Vacuum Regulator Assemblies (continued)

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McKinney, Texas 75070 USA
T [phone]

[phone]

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Bologna 40013, Italy
T [phone]

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T [phone]

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D102662X012 © 1999, 2019 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 01/19.
The Emerson logo is a trademark and service mark of Emerson
Electric Co. All other marks are the property of their prospective owners.
Fisher™ is a mark owned by Fisher Controls International LLC, a
business of Emerson Automation Solutions.

The contents of this publication are presented for information purposes
only, and while effort has been made to ensure their accuracy, they are
not to be construed as warranties or guarantees, express or implied,
regarding the products or services described herein or their use or
applicability. All sales are governed by our terms and conditions, which
are available on request. We reserve the right to modify or improve the

designs or specications of our products at any time without notice.

Emerson Process Management Regulator Technologies, Inc does not
assume responsibility for the selection, use or maintenance of any
product. Responsibility for proper selection, use and maintenance of any
Emerson Process Management Regulator Technologies, Inc. product
remains solely with the purchaser.