Bulletin 74.2:Y695A
Y695A Series Vapor Recovery Regulators
January 2010
W7381
Figure 1. Y695A Series Vapor Recovery Regulators
Features
• Precision Control—Large diaphragm area
provides very accurate throttling control at low
pressure settings.
• Easy Conversion—Changes easily from the
Type Y695A to the Type Y695AM with two O-rings
and a machine screw.
• Rugged Construction—Heavy duty casings and
internal parts are designed to reduce vibration and
shock and give this regulator the ability to
withstand 150 psig (10,3 bar) inlet pressure with
no internal parts damage.
• Simplicity—Direct-operated, straightforward stem
and lever design minimizes the number of parts
while providing excellent regulation of pressure.
Introduction
The Y695A Series are direct-operated vapor recovery
regulators. These regulators are used to sense an
increase in vessel pressure and vent excessive internal
tank pressure to an appropriate vapor recovery disposal
or reclamation system. They may also be used as
backpressure regulators or relief valves.
www.sherregulators.com
D102595X012
Bulletin 74.2:Y695A
Specications
Available Congurations
Type Y695A: Direct-operated vapor
recovery regulator.
Type Y695AM: Direct-operated vapor recovery
regulator equipped with a blocked throat and O-ring
stem seal. The lower diaphragm casing is tapped
1/2 NPT for control line connection.
Body Sizes
NPS 3/4 or 1 (DN 20 or 25)
End Connection Styles
See Table 1
Maximum Allowable Inlet (Casing) Pressure
(1)
150 psig (10,3 bar)
Maximum Outlet Pressure
(1)
150 psig (10,3 bar)
Maximum Emergency Inlet Pressure to Avoid
Internal Parts Damage
150 psig (10,3 bar)
Control Pressure Ranges
(1)
See Table 2
Flow Coefcients with Fully Open Disk
Cg: 120, CV: 3.43, C1: 35
Flow Capacities
See Table 4
Orice Size
7/16-inch (11 mm)
Construction Materials
See Table 3
Material Temperature Capabilities
Nitrile:
-20° to 180°F (-29° to 82°C)
Fluorocarbon (FKM):
40° to 300°F (4° to 149°C)
Peruoroelastomer (FFKM):
-20° to 300°F (-29° to 149°C)
Ethylenepropylene (EPDM):
-20° to 300°F (-29° to 149°C)
Pressure Setting Adjustment
Adjusting Screw
Spring Case Vent Connection
1/4 NPT
Diaphragm Case Connection
1/2 NPT
Approximate Weight
19 pounds (9 kg)
(1)
1. The pressure/temperature limits in this bulletin and any applicable standard or code limitation should not be exceeded.
Table 1. End Connection Styles
BODY SIZES,
NPS (DN)
3/4 or 1 (20 or 25) NPT
1. All anges have 14-inches (356 mm) face-to-face.
Ductile Iron
END CONNECTION STYLES
CF8M
Stainless Steel
NPT, ANSI Class 150 RF,
ANSI Class 300 RF, or PN 16/25/40
(1)
Table 2. Control Pressure Ranges
RELIEF SET PRESSURE RANGE
2 to 7-inches w.c.
3 to 13-inches w.c.
10 to 26-inches w.c.
0.9 to 2.5 psig
1.3 to 4.5 psig
3.8 to 7 psig
1. Spring ranges based on spring case installed pointed down. When installed pointing up, the spring ranges increase by 2-inches w.c. (5 mbar).
2. Do not use Fluorocarbon (FKM) diaphragm with these springs at diaphragm temperatures lower than 60°F (16°C).
(5 to 17 mbar)
(7 to 32 mbar)
(25 to 65 mbar)
(0,06 to 0,17 bar)
(0,09 to 0,31 bar)
(0,26 to 0,48 bar)
(1)(2)
(1)(2)
SPRING PART
NUMBER
1B653827052
1B653927022
1B537027052
1B537127022
1B537227022
1B537327052
SPRING COLOR SPRING WIRE DIAMETER FREE LENGTH
Red
Olive drab
Yellow
Light green
Light blue
Black
0.085-inch
0.105-inch
0.114-inch
0.156-inch
0.187-inch
0.218-inch
(2,2 mm)
(2,7 mm)
(2,9 mm)
(4,0 mm)
(4,8 mm)
(5,5 mm)
Hastelloy® C
ANSI Class 150 RF
3.625-inches
3.75-inches
4.188-inches
4.060-inches
3.938-inches
3.980-inches
(92,1 mm)
(95,2 mm)
(106 mm)
(103 mm)
(100 mm)
(101 mm)
2
Bulletin 74.2:Y695A
Type Y695A
Type Y695A
MXXXX
January 2010
Type Y695A
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
Table 3. Construction Materials
BODY SPRING CASE DIAPHRAGM CASE DISK HOLDER DIAPHRAGM DISK
Ductile iron,
CF8M Stainless steel,
or Hastelloy C
Ductile iron or
CF8M Stainless
steel
Table 4. Y695A Series Capacities
SPRING RANGE,
PART NUMBER, AND COLOR
2 to 7-inches w.c. (5 to 17 mbar)
1B653827052
Red
3 to 13-inches w.c. (7 to 32 mbar)
10 to 26-inches w.c. (25 to 65 mbar)
1B653927022
Olive drab
1B537027052
Yellow
0.9 to 2.5 psig (0,06 to 0,17 bar)
1B537127022
Light green
1.3 to 4.5 psig (0,09 to 0,31 bar)
1B537227022
Light blue
3.8 to 7 psig (0,26 to 0,48 bar)
1B537327052
Black
Ductile iron,
CF8M Stainless steel, or
Hastelloy C
SET PRESSURE
2-inches w.c.
(5 mbar)
4-inches w.c.
(10 mbar)
10-inches w.c.
(25 mbar)
15-inches w.c.
(37 mbar)
1 psig
(0,07 bar)
2 psig
(0,14 bar)
5 psig
(0,34 bar)
316 Stainless steel
or Hastelloy C
MINIMUM BUILDUP TO
WIDE-OPEN
1.5-inches w.c.
(3,7 mbar)
1.5-inches w.c.
(3,7 mbar)
2.3-inches w.c.
(5,7 mbar)
3.4-inches w.c.
(8,5 mbar)
0.40 psig
(0,03 bar)
0.88 psig
(0,06 bar)
1.66 psig
(0,11 bar)
VACUUM OUTLET
Nitrile (NBR),
Fluorocarbon (FKM), or
Nitrile (NBR) with bonded
Teon (PTFE)
PRESSURE
0 psig
(0 bar)
2.5 psig
(0,17 bar)
5 psig
(0,34 bar)
0 psig
(0 bar)
2.5 psig
(0,17 bar)
5 psig
(0,34 bar)
0 psig
(0 bar)
2.5 psig
(0,17 bar)
5 psig
(0,34 bar)
0 psig
(0 bar)
2.5 psig
(0,17 bar)
5 psig
(0,34 bar)
0 psig
(0 bar)
2.5 psig
(0,17 bar)
5 psig
(0,34 bar)
0 psig
(0 bar)
2.5 psig
(0,17 bar)
5 psig
(0,34 bar)
0 psig
(0 bar)
2.5 psig
(0,17 bar)
5 psig
(0,34 bar)
SPECIFIC GRAVITY NITROGEN
Nitrile (NBR),
Fluorocarbon (FKM),
Peruoroelastomer (FFKM),
Teon (PTFE), or
Ethylenepropylene (EPDM)
CAPACITIES IN
SCFH (Nm3/h) OF 0.97
280
(7,50)
1180
(31,6)
1520
(40,7)
350
(9,38)
1200
(32,2)
1530
(41,0)
520
(13,9)
1250
(33,5)
1570
(42,1)
640
(17,2)
1300
(34,8)
1600
(42,9)
940
(25,2)
1450
(38,9)
1720
(46,1)
1360
(36,4)
1730
(46,4)
1940
(52,0)
2110
(56,5)
2330
(62,4)
2470
(66,2)
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
B2648
Figure 2. Y695A Series Operational Schematic
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