Grieve Corporation Y690A Installation Manual
Instruction Manual
Form 5463
April 1999
Y690A Series
Y690A Series Pressure Reducing Regulators
Introduction
Scope of Manual
This manual provides instructions for installation,
startup, maintenance, and parts information for the
Y690A Series pressure reducing regulators.
Instructions and parts lists for other equipment used
with these regulators are found in separate manuals.
Product Description
The Y690A Series pressure reducing regulator (figure 1)
is ideally suited to control gas supply to in-plant
processing equipment. The rugged casings and sliding
pusher post design withstands the full 150 psig (10,3
bar) inlet pressure at both the inlet and outlet
connections. Because these regulators can withstand
the full inlet pressure, a downstream relief valve is not
required to protect the downstream side of the regulator
unless full capacity relief is required. These pressure
reducing regulators may be applied in a variety of
commercial and industrial applications. Available type
numbers are described as follows:
Type Y690A—Low-pressure, 1 to 7-inches w.c. (2 to 17
mbar), direct-operated regulator with internal registration
requiring no downstream control line.
Type Y690AH—Low-pressure, 5-inches w.c. to 7 psig
(12 to 480 mbar), direct-operated regulator with internal
registration requiring no downstream control line.
Type Y690AM—Low-pressure, 1 to 7-inches w.c. (2 to
17 mbar), direct-operated regulator. The Type Y690AM
has a blocked throat and O-ring stem seal for use when
Figure 1. Types Y690A and Y690AH Pressure Reducing Regulators
external registration is required. Lower diaphragm
casing assembly is tapped for 1/2-inch NPT for control
line connection.
Type Y690AHM—Low-pressure, 5-inches w.c. to 7 psig
(12 to 480 mbar), direct-operated regulator with a
blocked throat and O-ring stem seal for use when
external registration is required. Lower diaphragm
casing assembly is tapped for 1/2-inch NPT for control
line connection.
Specifications
The Specifications section on page 2 provides the
ratings and other specifications for the Y690A Series.
Individual regulator data is stamped on the nameplate
as it comes from the factory.
W7293
www.FISHERregulators.com
D102587X012
Y690A Series
Specifications
Body Sizes
3/4 (DN 20) or 1-inch (DN 25)
Regulator Temperature Capabilities
With Nitrile (NBR):
-20° to 180°F (-29° to 82°C)
End Connection Styles
See table 3
Maximum Allowable Inlet Pressure
150 psig (10,3 bar)
Maximum Operating Inlet Pressure
See table 2
Maximum Outlet (Casing) Pressure
(1)
(1)
(1)
With Fluoroelastomer (FKM):
40° to 300°F (4° to 149°C)
With Ethylenepropylene (EPDM):
-20° to 300°F (-29° to 149°C)
With Perfluoroelastomer (FFKM):
-20° to 300°F (-29° to 149°C)
Pressure Registration
Y690A and Y690AH: Internal
Y690AM and Y690AHM: External
150 psig (10,3 bar)
Spring Case Connection
Maximum Emergency Outlet Pressure to Avoid
Internal Parts Damage
(1)
1/4-inch NPT Screwed
Diaphragm Case Connection
150 psig (10,3 bar)
Outlet Pressure Ranges
(1)
See table 1
1. The pressure/temperature limits in this manual and any applicable standard or code limitation should not be exceeded.
1/2-inch NPT Screwed
Approximate Weight
19 pounds (8,6 kg)
(1)
Table 1. Outlet Pressure Ranges (Spring, key 6)
EPYTEGNARERUSSERPLORTNOCTELTUOREBMUNTRAPGNIRPSROLOCGNIRPSRETEMAIDERIWGNIRPS
dnaA096Y
MA096Y
dnaHA096Y
MHA096Y
)rabm6ot2(.c.wsehcni-2/1-2ot1
)rabm71ot6(.c.wsehcni-7ot2/1-2
)rabm52ot21(.c.wsehcni-01ot5
)rabm73ot71(.c.wsehcni-51ot7
)rabm38ot43(gisp2.1ot5.0
)rabm271ot38(gisp5.2ot2.1
)rab13,0ot71,0(gisp5.4ot5.2
)rab84,0ot13,0(gisp7ot5.4
.nwodgnitniopdellatsniebtsumesacgnirpsehtegnarerusserpteltuodehsilbupehteveihcaoT.1
)2()1(
250725855B1
)1(
250728356B1
250728356B1
220729356B1
250720735B1
220721735B1
220722735B1
250723735B1
.)C°61(F°06nahtrewolserutarepmetmgarhpaidtasgnirpsesehthtiwmgarhpaid)MKF(remotsaleoroulfesutonoD.2
egnarO
deR
deR
bardevilO
wolleY
neergthgiL
eulbthgiL
kcalB
Table 2. Maximum Operating Inlet Pressures
ECIFIRO
,EZIS
SEHCNI
)mm(
)2,3(8/1)3,01(051)3,01(051)3,01(051)3,01(051)3,01(051)3,01(051)3,01(051)3,01(051
)4,6(4/1
)5,9(8/3
)7,21(2/1
)3,41(61/9
)8,2(04
)4,1(02
)96,0(01
)43,0(5
A096YepyT MHA096Ydna,MA096Y,HA096YsepyT
.c.w.nI-5.2ot1
)rabm0,6ot5,2(
.c.w.nI-7ot5.2
)rabm71ot0,6(
)1,4(06
)4,1(02
)96,0(01
)43,0(5
.c.w.nI-01ot5
)rabm52ot21(
)2,5(57
)4,2(53
)55,0(8
)43,0(5
.c.w.nI-51ot7
)rabm73ot71(
)2,5(57
)4,2(53
)55,0(8
)43,0(5
EGNARERUSSERPTELTUO
gisP2.1ot5.0
)rabm38ot43(
)2,5(57
)4,2(53
)55,0(8
)43,0(5
gisP5.2ot2.1
)rabm271ot38(
)3,01(051
)1,4(06
)96,0(01
)14,0(6
gisP5.4ot5.2
)3,01(051
)1,4(06
)38,0(21
)55,0(8
)mm38,1(hcni-270.0
)mm2,2(hcni-580.0
)mm2,2(hcni-580.0
)mm7,2(hcni-501.0
)mm9,2(hcni-411.0
)mm0,4(hcni-651.0
)mm8,4(hcni-781.0
)mm5,5(hcni-812.0
)rab13,0ot71,0(
gisP7ot5.4
)rab84,0ot13,0(
)3,01(051
)1,4(06
)38,0(21
)55,0(8
2
HORIZONTAL PIPELINE
HORIZONTAL PIPELINE
Y690A Series
VENT POINTED DOWN
TYPE Y690AH
VENT POINTED DOWN
Figure 2. Types Y690AH and Y690AHM Actuator Casing Drainage Schematic
Installation
Personal injury, property damage,
equipment damage, or leakage due to
escaping gas or bursting of pressurecontaining parts may result if this
regulator is overpressured or installed
where service conditions could exceed
the limits given in the Specifications
section (page 2), 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
DOWNSTREAM CONTROL LINE
TYPE Y690AHM
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
DOWNSTREAM CONTROL PRESSURE
W6187
service conditions from exceeding
those limits.
Additionally, physical damage to the
regulator could cause personal injury or
property damage due to escaping gas.
To avoid such injury or damage, install
the regulator in a safe and well ventilated location.
Regulator operation within ratings does not preclude the
possibility of damage from debris in the lines or from
external sources. A regulator should be inspected for
damage periodically and after any overpressure condition
beyond the emergency outlet pressure limit specified in
the Specifications section (page 2). Key numbers refer-
enced in this section are shown in figures 4, 5, and 6.
3
Y690A Series
Note
If the regulator is shipped mounted on
another unit, install that unit according
to the appropriate instruction manual.
1. Only personnel qualified through training and
experience should install, operate, and maintain a
regulator. For a regulator that is shipped separately,
make sure there is no damage to, or foreign material in
the regulator. Also ensure that all tubing and pipingare
free of debris.
2. The regulator may be installed in any position as
long as the flow through the body is in the direction
indicated by the arrow on the body. Normal installation
is with the spring case barrel vertical above or below
the diaphragm case. However, when using a Type
Y690A or Y690AM regulator, for proper operation to
achieve the published capacities, the spring case barrel
should be installed pointed down as shown in figure 1.
For complete actuator drainage of Types Y690AH and
Y690AHM, the regulator should be installed as shown
in figure 2. If continuous operation of the system is
required during inspection or maintenance, install a
three-valve bypass around the regulator.
before putting the regulator into operation. The control
line pipe should be at least 1/2-inch in diameter and
connected to a straight section of outlet piping 5 to 10
pipe diameters downstream of the regulator. If turbu-
lence exists, a hand valve can be installed in a straight
section of the control line. This hand valve can be
throttled down to dampen out pulsations which may
cause instability or cycling of the regulator.
Startup and Adjustment
To avoid personal injury, property
damage, or equipment damage caused
by bursting of pressure containing parts
or explosion of accumulated gas, never
adjust the control spring to produce an
outlet pressure higher than the upper
limit of the outlet pressure range for that
particular spring. If the desired outlet
pressure is not within the range of the
control spring, install a spring of the
proper range according to the Diaphragm and Spring Case Area section of
the maintenance procedure.
A regulator 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 a regulator in hazardous gas service
to a remote, safe location away from air
intakes or any hazardous area. The vent
line or stack opening must be protected
against condensation or clogging.
3. To keep the spring case vent from being plugged or
the spring case from collecting moisture, corrosive
chemicals, or other foreign material, point the vent down
or otherwise protect it. The diaphragm casing (key 4)
may be rotated in order to obtain desired positioning.
4. To remotely vent the regulator, remove the vent
(key 26) and install obstruction-free tubing or piping into
the 1/4-inch NPT vent tapping. Provide protection on a
remote vent by installing a screened vent cap into the
remote end of the vent pipe.
5. The Types Y690AM and Y690AHM require a down-
stream control line. Be sure to install the control line
Y690A Series regulators can be placed in operation by
slowly introducing inlet pressure. The regulator takes
control when downstream pressure is established. The
regulator has been adjusted at the factory to provide
approximately the reduced pressure requested on the
order. With a spring-loaded regulator, the pressure
setting may be adjusted to a value within the spring
range shown in table 2. To adjust the pressure setting,
perform the following steps (key numbers are refer-
enced in figures 4, 5, and 6):
1. Remove the closing cap (key 22).
2. Use a 1-inch (25,4 mm) hex rod or flat screwdriver
to turn the adjusting screw (key 35) either clockwise to
increase outlet pressure or counterclockwise to decrease outlet pressure.
Shutdown
First close the nearest upstream shutoff valve and then
close the nearest downstream shutoff valve to vent the
regulator properly. Next, open the vent valve between
the regulator and the downstream shutoff valve nearest
to it. All pressure between these shutoff valves is
4
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