Emerson Y696 User manual

Introduction
This installation guide provides instructions for
installation, startup and adjustment. To receive a
copy of the instruction manual, contact your local
Sales Ofce or view a copy at www.sher.com. For
further information refer to: Type Y696 Instruction
Manual, D101770X012.
PED Categories
This product may be used as a safety accessory with
pressure equipment in the following Pressure Equipment
Directive categories. 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 CATEGORIES FLUID TYPE
DN 40 and 50 / NPS 1-1/2 and 2 I 1
Specications
Body Sizes and End Connection Styles(1)
See Table 1
Maximum Allowable Inlet and Outlet Pressures(1)
1.0 bar / 15 psig
Proof test Pressure
All Pressure Retaining Components have been
proof tested per Directive.
Control Pressure Ranges(1)
See Table 2
Temperature Capabilities(1)
Nitrile (NBR): -29 to 82°C / -20 to 180°F
Fluorocarbon (FKM): 4 to 149°C / 40 to 300°F
Perfluoroelastomer (FFKM): -18 to 149°C /
0 to 300°F
Ethylenepropylene (EPDM): -29 to 135°C /
-20 to 275°F
Installation
!
WARNING
Only qualied personnel should install
or service a backpressure regulator.
Backpressure regulators should be
installed, operated and maintained
in accordance with international and
applicable codes and regulations and
Emerson Process Management Regulator
Technologies Inc. instructions.
If the regulator vents uid or a leak
develops in the system, it indicates
that service is required. Failure to
take the backpressure regulator out
of service immediately may create a
hazardous condition.
Personal injury, equipment damage
or leakage due to escaping uid or
bursting of pressure-containing parts
may result if this backpressure regulator
is overpressured or is installed where
service conditions could exceed the limits
given in the Specications section, 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 limits.
Additionally, physical damage to
the backpressure regulator could
result in personal injury and property
damage due to escaping uid. To
avoid such injury and damage, install
the backpressure regulator in a
safe location.
Clean out all pipelines before installation of the
regulator and check to be sure the regulator has not
been damaged or has collected foreign material during
shipping. For NPT bodies, apply pipe compound to
the external pipe threads. For anged bodies, use
suitable line gaskets and approved piping and bolting
practices. Install the backpressure regulator in any
position desired, unless otherwise specied, but be
sure ow through the body is in the direction indicated
by the arrow on the body.
Note
It is important that the backpressure
regulator be installed so that the vent
hole in the spring case is unobstructed
at all times. For outdoor installations,
the backpressure regulator should be
located away from vehicular trafc and
positioned so that water, ice and other
foreign materials cannot enter the spring
case through the vent. Avoid placing the
backpressure regulator beneath eaves
or downspouts, and be sure it is above
the probable snow level.
1. The pressure/temperature limits in this installation guide and any applicable standard or code limitation should not be exceeded.
Type Y696
Installation Guide
D101770X014
English – February 2016

Overpressure Protection
Maximum inlet pressures depend upon body
materials and temperatures. Refer to the nameplate
for the maximum inlet pressure of the valve. The
valve should be inspected for damage after any
overpressure condition. Fisher™ backpressure
regulators are not ASME safety relief valves.
Startup
The backpressure regulator 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 relief valves
properly adjusted, slowly open the upstream and
downstream shutoff valves.
Adjustment
To change the control pressure, remove the closing
cap or loosen the locknut and turn the adjusting
screw clockwise to increase control pressure or
counterclockwise to decrease pressure. Monitor
the control pressure with a test gauge during the
adjustment. Replace the closing cap or tighten the
locknut to maintain the desired setting.
Taking Out of Service (Shutdown)
!
WARNING
To avoid personal injury resulting from
sudden release of pressure, isolate the
backpressure regulator from all pressure
before attempting disassembly.
Parts List
Key Description
1 Control Spring
2 Adjusting Screw
3 Closing Cap
4 Lower Control Spring Seat
5* Diaphragm
6 Lower Diaphragm Plate
7 Diaphragm Plate Gasket
8 Pusher Post
9 Lever Assembly
11 Machine Screw
13 Stem
14* Cotter Pin
16* Body Gasket
17 Split Ring
19 Union Nut
20 Lower Casing
21 Diaphragm Case Cap Screw
22 Hex Nut
23 Spring Case
24 Diaphragm Plate
25* Disk Assembly
27 Orice
28 Body
29 Pipe Plug
30 Diaphragm Cap Screw
35* Closing Cap Gasket
38 Body Cap Assembly
40 Disk Shut-Off Stem
41 Disk Spring
44 Upper Spring Seat
46 Valve Disk Washer
47 Disk Screw
50 Nameplate
51 Drive Screws
75 Bushing
78 Pipe Plug
Table 1. Body Sizes and End Connection Styles
BODY SIZE BODY MATERIAL
DN In. Cast Iron Steel Stainless Steel Hastelloy®C
40 and 50 1-1/2 and 2 NPT NPT, SWE, CL150 RF,
CL300 RF, PN 16/25/40
NPT, SWE, CL150 RF,
CL300 RF, PN 16/25/40 CL150 RF
Table 2. Control Pressure Ranges
CONTROL PRESSURE RANGE SPRING COLOR
mbar In. w.c.
5 to 12(1)(2)
12 to 37(1)(2)
20 to 69
2 to 5(1)(2)
5 to 15(1)(2)
8 in. w.c. to 1 psig
Red
Gray
Dark Green
69 mbar to 0.19 bar
0.14 to 0.24 bar
0.28 to 0.48 bar
1 to 2.8 psig
2 to 3.5 psig
4 to 7 psig
Orange
Green stripe
Red
1. Spring ranges based on spring case installed pointed down. When installed pointed up, spring range increases 5 mbar / 2 in. w.c.
2. Do not use Fluorocarbon (FKM) diaphragm with these springs at diaphragm temperatures lower than 16°C / 60°F.
*Recommended spare part
Type Y696
2

Figure 1. Type Y696 Assembly
SECTION A-A
43B0679
29
50
51
56
75
21
22
6
7
8
9
20
13
11
19
17
16
28
27
47
46
14
41
40
5
24
4
3
2
35
1
30
23
25
38
A
A
Type Y696
3

Type Y696
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Emerson Automation Solutions
For further information on the current
PED revision see Bulletin: D103053X012
or scan the QR code.
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D101770X014 © 2002, 2018 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 12/18.
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