Emerson Y692 Data Sheet

Bulletin 74.1:Y692

November 2014

Type Y692 Gas Blanketing Regulator System

W5930-1

Figure 1. Type Y692 Low-Pressure Gas Blanketing Regulator

Introduction

An Accu-Pressure™ Gas Blanketing Regulator System
reduces a high-pressure gas, such as Nitrogen, to
maintain a protective environment above any liquid
stored in a tank or vessel when the liquid is being
pumped out. Also when the vessel is suddenly cooled,
causing vapors inside the vessel to contract, the
regulator system replaces the volume of contracting
vapors with a volume of blanketing gas to prevent
the internal vessel pressure from decreasing. In both
cases, a slight positive vessel pressure prevents
outside air, moisture and other contaminants from
entering the vessel and the possible collapse of the
vessel walls.

The Type Y692 (Figure 1) is a direct-operated
regulator used for accurate pressure control on
very low-pressure blanketing systems. Downstream
pressure is sensed through a pitot tube installed in
the lower casing of the regulator for units with internal
pressure registration or through a downstream control
line for units with external pressure registration.
The Type Y692 is available in NPS 1-1/2 and 2 /
DN 40 and 50 body sizes.

Features

• Ease of Inspection and Maintenance—The union

nut connection between the body and actuator

permits access to the disk and orice by only

removing the diaphragm casing assembly without
removing the body from the line.

• Accuracy of Control—Large diaphragm areas

provide more precise control even at low-pressure
settings and the pitot tube also creates a dynamic
boost that helps provide greater capacity.

• Speed of Response—The downstream pressure is

sensed directly by the diaphragm through the pitot
tube providing quick response.

• Ease of Installation—The Type Y692 is easy

to install in the pipeline because no additional
connections are required.

www.fisherregulators.com

D102032X012

Bulletin 74.1:Y692

Specications

This section lists the specications of theType Y692 Gas Blanketing Regulator System. Factory specication,
such as spring range and orice size are stamped on the nameplate fastened on the regulator at the factory.

AvailableCongurations

Direct-operated pressure reducing regulator with

external or internal pressure registration with
seven outlet (control) pressure ranges from
1 in. w.c. to 7 psig / 2 mbar to 0.48 bar. Available in
NPS 1-1/2 and 2 / DN 40 and 50 body sizes.

Body Sizes and End Connection Styles

(1)

Cast Iron: NPS 1-1/2 / DN 40, NPT,

NPS 2 / DN 50, NPT or CL125 FF

Steel: NPS 1-1/2 or 2 / DN 40 or 50, NPT, SWE,

CL150 RF, CL300 RF or PN 16/25/40

Stainless steel: NPS 1-1/2 or 2 / DN 40 or 50,

NPT, CL150 RF, CL300 RF or PN 16/25/40

Maximum Inlet Pressure

(2)

150 psig / 10.3 bar

Maximum Outlet (Casing) Pressure

(2)

15 psig / 1.0 bar

Maximum Operating Outlet (Control) Pressure to
Avoid Internal Part Damage

(2)

3 psig / 0.21 bar above outlet (control)

pressure setting

Control Pressure Ranges

(2)

See Table 1

Flow Capacities

See Table 5

ReliefSizingCoefcients

See Table 6

OriceSize

See Table 6

Pressure Registration
Internal (standard) or External

Spring Case Connection

1/4 NPT

Temperature Capabilities

(2)

Nitrile (NBR):

-20 to 180°F / -29 to 82°C

Fluorocarbon (FKM):

0 to 300°F / -18 to 149°C

 Peruoroelastomer(FFKM):

-20 to 300°F / -29 to 149°C

EthylenePropylene (EPDM):

-20 to 275°F / -29 to 135°C

IECSizingCoefcients

XT: 0.775
FD: 0.50
FL: 0.89

Approximate Weights
Cast Iron Body: 45 lbs / 20 kg
Steel/Stainless steel Body: 57 lbs / 26 kg

Canadian Registration Number (CRN)

Approved

PED (Pressure Equipment Directive) Category

The Type Y692 may be used as a safety

accessory with pressure equipment in the
PED 97/23/EC Category I.

Construction Materials
Body, Union Nut, Spring Case and Lower
Casing Assembly: Cast iron, WCC steel,

CF8M Stainless steel

Control Spring, Control Spring Seat, Split Ring

and Diaphragm Plate: Plated steel
Diaphragm: Nitrile (NBR) (standard),

Fluorocarbon (FKM), Ethylenepropylene (EPDM),
Silicone (VMQ)

O-rings: Nitrile (NBR), Fluorocarbon (FKM),

Peruoroelastomer (FFKM),

Ethylenepropylene (EPDM)

Orice,PusherPost,PusherPostConnector,

Lever Assembly, Stem and Pitot Tube:
Stainless steel
Gasket: Composition

Disk Assembly: Nitrile (NBR) and Stainless steel,
Fluorocarbon (FKM) and Stainless steel,
Polytetrauoroethylene (PTFE) and Stainless steel
or Ethylenepropylene (EPDM) and Stainless steel

1. Fabricated by using slip-on anges and socket welding nipples into body.

2. The pressure/temperature limits in this Bulletin and any applicable standard limitation should not be exceeded.

2

Table 1. Control Pressure Ranges

CONTROL PRESSURE RANGE WITH

CASE BARREL POINTED DOWN

(2)(3)

(2)(4)

Light Spring

Assembly

1 to 3 in. w.c. / 2 to 7 mbar

3 to 11 in. w.c. / 7 to 27 mbar

6.5 in. w.c. to 1.2 psig / 16 mbar to 83 mbar

0.7 to 2 psig / 48 mbar to 0.14 bar
1 to 3.2 psig / 69 mbar to 0.22 bar

Heavy spring

Assembly

1. Install with spring case pointing down to achieve low setpoints in these spring ranges.

2. Do not use Fluorocarbon (FKM) diaphragm with these springs at diaphragm temperature lower than 60°F / 16°C.

3. Installation with spring case pointing up will change outlet (control) pressure range to 3 to 5 in. w.c. / 7 to 12 mbar.

4. Installation with spring case pointing up will change outlet (control) pressure range to 5.75 to 14 in. w.c. / 14 to 35 mbar.

5. Installation with spring case pointing up will change outlet (control) pressure range to 7.5 in. w.c. to 1.3 psig / 19 to 90 mbar.

2 to 5.5 psig / 0.14 to 0.38 bar
4 to 10 psig / 0.28 to 0.69 bar

CONTROL SPRING

COLOR CODE

(5)

Silver with green stripe

Brown

Iridite

Green

Blue

Orange

Silver

CONTROL SPRING

PART NUMBER

1D892527022
0B019727052
0B019427052
0B019627032
0A081127202

0Y066427022
1H802427032

Bulletin 74.1:Y692

SPRING WIRE

DIAMETER

In. mm In. mm

0.109

0.148

0.187

0.225

0.250

0.363

0.406

2.77

3.76

4.75

5.71

6.35

9.22

10.3

SPRING FREE

LENGTH

6.12

6.00

6.00

6.00

6.00

6.00

6.00

155
152
152
152
152

152
152

Table 2. Flow Rate Conversion

(1)

MULTIPLY MAXIMUM PUMP RATE OUT BY TO OBTAIN

U.S. GPM
U.S. GPH

m3/hr

Barrels/hr

Barrels/day

1. Gas ow of blanketing gas to replace liquid pumped out.

8.021

0.1337

1.01

5.615

0.2340

SCFH
SCFH
Nm3/H

SCFH
SCFH

Table 3. Conversion Factors (for converting Nitrogen ow rates to other gas ow rates)

BLANKET GAS SPECIFIC GRAVITY CORRECTION FACTOR

Natural Gas 0.60 1.270

Air 1.00 0.985

Dry CO

2

Correction Factor = 0.985

1.52 0.797

SG

Table 4. Gas Flow Required for Thermal Heating (Outbreathing) or Cooling (Inbreathing) per API 2000 (Interpolate for Intermediate size)

VESSEL CAPACITY AIR FLOW RATE REQUIRED

Barrel Gallon Liter SCFH Nm3/h

60
100
500

1000
2000

3000
4000

5000
10,000
15,000

20,000
25,000
30,000
35,000
40,000

45,000
50,000
60,000
70,000
80,000

90,000

100,000
120,000
140,000
160,000

180,000 7,560,000 28,616,000 90,000 2412

2500

4200
21,000
42,000
84,000

126,000
168,000
210,000
420,000
630,000

840,000
1,050,000
1,260,000
1,470,000
1,680,000

1,890,000
2,100,000
2,520,000
2,940,000
3,360,000

3,780,000
4,200,000
5,040,000
5,880,000
6,720,000

9500
16,000
79,500

159,000
318,000

477,000
636,000

795,000
1,590,000
2,385,000

3,180,000
3,975,000
4,769,000
5,564,000
6,359,000

7,154,000
7,949,000
9,539,000

11,129,000
12,718,000

14,308,000
15,898,000
19,078,000
22,437,000
25,437,000

60
100
500

1000
2000

3000
4000

5000
10,000
15,000

20,000
24,000
28,000
31,000
34,000

37,000
40,000
44,000
48,000
52,000

56,000
60,000
68,000
75,000
82,000

1.6

2.7

1.3

26.8

53.6

80.4
107
134
268
402

536
643
750
831
911

992

1072
1179
1286
1394

1501
1608
1822
2010
2198

3

Bulletin 74.1:Y692

Type Y692

July 2007

Type Y692

Type Y692

Type Y692

VENT

BLOCK

VALV E

SUPPLY

PRESSURE

GAS BLANKETING PRESSURE

TYPE Y692 WITH INTERNAL REGISTRATION

VALV E

LIQUID

BLOCK

VALV E

VENT

VALV E

VENT

POINTED

DOWNWARD

A6340

INLET PRESSURE

CONTROL PRESSURE (OUTLET PRESSURE)

ATMOSPHERIC PRESSURE

VENT

BLOCK

VALV E

SUPPLY

PRESSURE

VALV E

VENT

VALV E

BLOCK

VALV E

GAS BLANKETING PRESSURE

LIQUID

TYPE Y692 WITH EXTERNAL REGISTRATION

VENT

POINTED

DOWNWARD

Figure 2. Type Y692 Operational Schematics

4