Instruction Manual
Form 5312
February 2016
Type Y696 Vapor Recovery Regulator
Type Y696
W5996
Figure 1. Type Y696 Vapor Recovery Regulator
Introduction
Scope of Manual
This Instruction Manual includes installation, startup,
maintenance and parts information for the Type Y696
vapor recovery regulator.
Product Description
The Type Y696 vapor recovery regulator is a directoperated regulator with internal registration requiring
no downstream control line. It is used to sense
increase in vessel pressure and vent excessive
internal vessel pressure to an appropriate vapor
recovery disposal or reclamations system.
Principle of Operation
The Type Y696 is used to maintain a constant inlet
(blanket) pressure with the outlet owing to a system
whose pressure is lower than that at the inlet.
When vessel pressure increases above the setpoint
of the regulator due to pumping in or thermal heating,
the force of the control spring is overcome by
www.sherregulators.com
D101770X012
Type Y696
Specications
The Specications section lists maximum pressures, temperatures and other specications. Specications for a
given regulator as it originally comes from the factory are stamped on the spring case nameplate.
Body Size and End Connection Style
See Table 1
Maximum Allowable Inlet and Outlet Pressure
15 psig / 1.0 bar
(1)
Spring Case and Vent Connections
1/4 in. NPT
(2)
Maximum Temperature Capabilities
Nitrile (NBR): -20 to 180°F / -29 to 82°C
Fluorocarbon (FKM): 40 to 300°F / 4 to 149°C
Control Pressure Ranges
See Table 2
Peruoroelastomer (FFKM): 0 to 300°F /
-18 to 149°C
Ethylenepropylene (EPDM): -20 to 275°F /
Pressure Registration
-29 to 135°C
Internal or External
1. End connections for other than U.S. standard can usually be provided, consult your local Sales Ofce.
2. The pressure/temperature limits in this Instruction Manual or any applicable standard limitation should not be exceeded.
(2)
M1058
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
2
Figure 2. Type Y696 Vapor Recovery Operational Schematic
VAPOR PRESSURE
LIQUID
VAPOR RECOVERY
VACUUM SOURCE
Type Y696
Table 1. Body Sizes and End Connection Styles
BODY SIZE BODY MATERIAL
In. DN Cast Iron Steel Stainless Steel Hastelloy
1-1/2 and 2 40 and 50 NPT
NPT, SWE, CL150 RF,
CL300 RF, PN 16/25/40
Table 2. Control Pressure Ranges
CONTROL PRESSURE RANGE
In. w.c. mbar In. mm In. mm
(1)(2)
2 to 5
(1)(2)
5 to 15
8 in. w.c. to 1 psig
1 to 2.8 psig
2 to 3.5 psig
4 to 7 psig
1. Spring ranges based on spring case installed pointed down. When installed pointed up, spring range increases 2 in. w.c. / 5 mbar.
2. Do not use Fluorocarbon (FKM) diaphragm with these springs at diaphragm temperatures lower than 60°F / 16°C.
69 mbar to 0.19 bar
0.14 to 0.24 bar
0.28 to 0.48 bar
5 to 12
12 to 37
20 to 69
(1)(2)
(1)(2)
SPRING PART
NUMBER
1A200127022
1B766627062
0B019427052
0A081127202
0Y066427022
1H802427032
SPRING COLOR
Red
Gray
Dark Green
Orange
Green stripe
Red
SPRING WIRE DIAMETER SPRING FREE LENGTH
0.135
0.156
0.187
0.250
0.363
0.406
NPT, SWE, CL150 RF,
CL300 RF, PN 16/25/40
3.43
3.96
4.75
6.35
9.22
10.3
5.38
6.63
6.00
6.00
6.00
6.00
CL150 RF
®
C
137
168
152
152
152
152
pressure acting on the diaphragm. This moves the
disk away from the orice allowing gas to ow from
the vessel to the vapor recovery system.
As vessel pressure is reduced, the force of the
control spring causes the disk to move toward the
orice decreasing the ow of gas out of the vessel.
As vessel pressure drops below the setpoint of the
regulator, the disk will seat against the orice shutting
off the ow of gas.
Installation
WARNING
!
Personal injury, equipment damage or
leakage due to escaping accumulated gas
or bursting of pressure-containing parts
may result if the vapor recovery regulator
is overpressured or installed where
service conditions could exceed the limits
given in the Specications 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 to prevent service conditions from
exceeding those limits.
Additionally, physical damage to the
vapor recovery regulator could result
in personal injury and property damage
due to escaping accumulated gas. To
avoid such injury and damage, install
the vapor recovery regulator in a safe
and well ventilated location.
®
Hastelloy
C is mark owned by Haynes International, Inc.
1. Use qualied personnel when installing, operating
and maintaining the regulator. Before installing,
inspect the regulator for any shipment damage or
foreign material that may have collected during
crating and shipment. Make certain the body
interior is clean and the pipelines are free of
foreign material. Apply pipe compound only to the
male pipe threads.
2. Install the regulator using a straight run of pipe
the same size or larger as the regulator body (as
shown in Figure 2). Flow through the regulator
body is indicated by the ow arrow cast on the
body. If a block valve is required, install a full ow
valve between the regulator and the blanketed
vessel. For proper operation, the regulator should
be installed with the spring case barrel pointed
down. Key numbers referenced in this section are
shown in Figure 3.
WARNING
!
A regulator 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 a regulator in hazardous
gas service to a remote, safe location
away from air intakes or any hazardous
location. 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.
3
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