Page 1
Installation Guide
D102661X014
January 2010
Y692VB Series
Introduction
This Installation Guide provides instructions for
installation, startup and adjustment. To receive a
copy of the Instruction Manual, contact your local
Sales Office or view a copy at www.fisher.com. For
further information refer to Y692VB Series Instruction
Manual, D102661X012.
PED Category
This product may be used as a safety accessory
with pressure equipment in the following Pressure
Equipment Directive. It may also be used outside
of the Pressure Equipment Directive using Sound
Engineering Practice (SEP) per table below.
For information on the current PED revision see
Bulletin: D103053X012.
PRODUCT SIZE CATEGORY FLUID TYPE
DN 40 to 50 /
NPS 1-1/2 to 2
I 1
Specifications
Body Sizes and End Connection Styles
DN 40 / NPS 1-1/2 : NPT, SWE, CL150 RF,
CL300 RF and PN 16/25/40
DN 50 / NPS 2: NPT, SWE, CL125 FF, CL150 RF,
CL300 RF and PN 16/25/40
Maximum Allowable Inlet (Positive) Pressure
Orifice Sizes
19 mm / 3/4-in. Orifice: 2.1 bar / 30 psig
30 mm / 1-3/16-in. Orifice: 0.90 bar / 13 psig
Vacuum Control Pressure Ranges
See Table 1
Maximum Casing Pressure
(2)
0.55 bar / 8 psig Vacuum
Pressure Registration
Type Y692VB: Internal
Type Y692VBM: External
Spring Case Connection
3/4 NPT
(1)
(2)
and
(2)
Type Y692VB Gauge Tap Connection
1/4 NPT
Type Y692VBM Control Line Connection
1/2 NPT
Temperature Capabilities
(2)
Nitrile (NBR): -40 to 82°C / -40 to 180°F
Fluorocarbon (FKM): 4 to 149°C / 40 to 300°F
Ethylenepropylene (EPR): -29 to 93°C /
-20 to 200°F
Perfluoroelastomer (FFKM): -18 to 149°C /
0 to 300°F
Silicone: -40 to 204°C / -40 to 400°F
Approximate Weight
Cast Iron: 20 kg / 45 lbs
®
Steel, Stainless Steel or Hastelloy
C: 26 kg /
57 lbs
Installation
WARNING
!
Only qualified personnel shall install
or service a vacuum breaker. Vacuum
breaker should be installed, operated
and maintained in accordance with
international and applicable codes
and regulations and Emerson Process
Management Regulator Technologies,
Inc. instructions.
If using a vacuum breaker on a
hazardous or flammable fluid service,
personal injury and property damage
could occur due to fire or explosion of
vented fluid that may have accumulated.
To prevent such injury or damage,
provide piping or tubing to vent the
fluid to a safe, well ventilated area or
containment vessel. Also, when venting
a hazardous fluid, the piping or tubing
should be located far enough away
from any buildings or windows so to
not create a further hazard and the vent
opening should be protected against
anything that could clog it.
Hastelloy® C is a mark owned by Haynes International, Inc.
1. End connections for other than U.S. standards can usually be provided; consult your local Sales Oce.
2. The pressure/temperature limits in this Installation Guide and any applicable standard or code limitation should not be exceeded.
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Y692VB Series
Table 1. Vacuum Pressure Information
VACUUM CONTROL PRESSURE RANGE
mbar in. w.c. mbar in. w.c.
(2)
2 to 7
(2)
7 to 20
20 to 40
40 to 80
17 mbar to 0.21 bar
1. Pressure ranges are based on the spring case pointing up. Pointing the spring case down increases the pressure range 4 mbar / 1.7 in. w.c..
(Example: 2 to 7 mbar / 1 to 3 in. w.c. changes to 7 to 12 mbar / 2.7 to 4.7 in. w.c..
2. Do not use uorocarbon (FKM) with these springs at diaphragm temperatures lower than 4°C / 40°F.
Personal injury, equipment damage
or leakage due to escaping fluid or
bursting of pressure-containing parts
may result if this vacuum breaker is
overpressured or is installed where
service conditions could exceed the
limits given in the Specifications
section or where conditions exceed
any ratings of the adjacent piping or
piping connections.
(1)
1 to 3
3 to 8
8 to 16
16 to 32
0.25 to 3 psig
CHANGE IN VACUUM CONTROL PRESSURE TO REACH WIDE-OPEN
3
10
13
26
0.14 bar
Startup
The vacuum breaker is factory set at approximately
the midpoint of the spring range or the pressure
requested, so an initial adjustment may be required
to give the desired results. With proper installation
completed and vacuum breakers properly adjusted,
slowly introduce inlet pressure. The unit takes
control when vacuum is established. This equipment
is suitable for the vacuum control pressure range
stamped on the nameplate.
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 limits.
Additionally, physical damage to the
vacuum breaker could result in personal
injury and property damage due to
Adjustment
To adjust the pressure setting, remove the closing cap
and turn the adjusting nut clockwise to increase the
pressure setting or counterclockwise to decrease the
setting. Replace the closing cap after adjustment. The
closing cap may be wired to the hole provided in the
spring case to discourage tampering.
escaping fluid. To avoid such injury and
damage, install the vacuum breaker in a
Taking Out of Service (Shutdown)
safe location.
Clean out all pipelines before installation of the
vacuum breaker and check to be sure the vacuum
breaker has not been damaged or has collected
foreign material during shipping. For NPT bodies,
apply pipe compound to the external pipe threads.
For flanged bodies, use suitable line gaskets and
approved piping and bolting practices. Install the
vacuum breaker in any position desired, unless
otherwise specified, but be sure flow through the body
is in the direction indicated by the arrow on the body.
To avoid personal injury resulting from
sudden release of pressure, isolate the
vacuum breaker from all pressure before
attempting disassembly.
To shut down the unit, close the upstream shut-off
valve, and then close the downstream shut-off valve to
vent the equipment properly. Next, open the vent valve
between the equipment and the downstream shut-off
valve nearest to it. All pressure between these shut-off
!
valves is released through the open vent valve.
1.2
4.0
5.0
10.5
2 psig
WARNING
2
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3
35 44
Y692VB Series
2
1
4
6
21
23
36
37 19 14
4875
272517
474628161311242022
Parts List
Key Description
1 Spring
2 Adjusting Nut
3 Closing Cap
4 Lower Spring Seat
5* Diaphragm
6 Upper Diaphragm Head
7* Lower Head Gasket
8 Pusher Post
9 Lever Assembly
11 Machine Screw (2 Required)
13 Valve Stem
14* Cotter Pin
15* O-Ring (Stem Seal for Type Y692VBM only)
16* Body Gasket
17 Split Ring
19 Union Nut
20 Diaphragm Casing
21 Cap Screw (12 required)
Figure 1. Y692VB Series Assembly
Key Description
22 Hex Nut (12 required)
23 Spring Case
24 Lower Diaphragm Head
25* Disk Holder Assembly
27 Orifice
28 Body
29 Pipe Plug (Use on Type Y692VB)
35* Closing Cap Gasket
36 Adjusting Stem
37 Diaphragm Hex Nut
44 Upper Spring Seat
46 Valve Disk Washer
47 Machine Screw
51 Drive Screw
56 Vent Assembly, Y602X1-11 (not shown)
71 Pipe Bushing (not shown)
95 NACE Tag (NACE Construction only, not shown)
96 Tag Wire (NACE Construction only, not shown)
* Recommended Spare Part
3
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Y692VB Series
A
19 14
50 51
734 BVB
TYPE
ORIFICE
SPRING
3 - 8” WC
RANGE
DATE MFGD.
FISHER GOVERNOR CO.
MARSHALLTOWN, IOWA,USA
1”
2 - 54
15
272517
474628161311
Figure 2. Type Y692VBM O-Ring Stem Seal Detail Figure 3. Y692VB Series Nameplate Detail
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D102661X014 © 2019 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 08/19.
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