Emerson 1190 Data Sheet

Bulletin 74.1:1190

April 2012

Type 1190 Low-Pressure Gas Blanketing Regulator

W7428

Figure 1. Type 1190 Low-Pressure Gas Blanketing Regulator

Introduction

The Type 1190 low-pressure gas blanketing regulator
is used for extremely accurate pressure control on
very low-pressure blanketing systems. The regulator
helps to control emissions and provides protection
against any contamination from atmospheric conditions

by providing a ushing action. The Type 1190 gas

blanketing regulator maintains a positive vessel
pressure thereby reducing the possibility of vessel wall
collapse during pump-out operations.

A Type 1190 low-pressure gas blanketing regulator
reduces a high-pressure gas, such as Nitrogen, to
maintain a protective environment above any liquid
stored in a tank or vessel while the liquid is being
pumped out. Also, when the vessel cools suddenly
causing the vapors inside the vessel to condense,
the gas blanketing regulator replaces the condensed
vapors with the 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.

Features

• Quick-Change Trim Package—Tested trim

packages can be made up and stocked ahead of
time for fast replacement.

• In-Service Travel Inspection—Standard
indicator assembly with protective cover permits
periodic inspection of plug travel without removing
regulators from service.

• Easy In-Line Maintenance—Top-entry design
reduces maintenance time and manpower
requirements; trim parts can be inspected,
cleaned, and replaced without removing the main
valve body from the pipeline.

• Factory-Piped Pilot Supply—Supply pressure to
pilot is supplied from inlet side of the main valve
body through tubing furnished with the regulator.

www.sherregulators.com

D101962X012

Bulletin 74.1:1190

Specications

Body Sizes

(1)

See Table 1

Maximum Main Valve Inlet Pressures

(2)

400 psig / 27.6 bar

Maximum Operating Inlet Pressures

(2)

200 psig / 13.8 bar with cast iron construction

or 300 psig / 20.7 bar with a steel or stainless
steel construction

Maximum Outlet (Casing) Pressure

(2)

75 psig / 5.2 bar

Maximum Operating Outlet Pressure to Avoid
Internal Part Damage

(2)

75 psig / 5.2 bar

Outlet Pressure Ranges (Type Y191A Pilot)

(2)

See Table 2

Main Valve Orice Diameters and Travels

See Table 3

Proportional Bands

See Table 4

Maximum and Minimum Differential Pressures

See Table 5

Flow Coefcients for Relief Valve Sizing

See Table 8

Flow Coefcients for Fixed Restriction

Cg: 3; Cv: 11.7; C1: 35

Supply Pressure Settings Required for the
Type 95H Supply Pressure Regulator

See Table 9

Flow Capacities

See Table 10

Pressure Registration

External

Main Valve Flow Characteristic

Linear

Control Line Connection

3/4 NPT

Vent Connection on Pilot Spring Case

1/4 NPT

Temperature Capabilities

Nitrile (NBR):

(2)

-20 to 180°F / -29 to 82°C
Fluorocarbon (FKM):
40 to 300°F / 4 to 149°C
Ethylenepropylene (EPDM):

-20 to 275°F / -29 to 135°C
Peruoroelastomer (FFKM):

-20 to 300°F / -29 to 149°C

Approximate Weights

NPS 1 / DN 25: 85 pounds / 39 kg

NPS 2 / DN 50: 100 pounds / 45 kg
NPS 3 / DN 80: 145 pounds / 66 kg
NPS 4 / DN 100: 195 pounds / 88 kg
NPS 6 / DN 150: 380 pounds / 172 kg
NPS 8 x 6 / DN 200 x 150: 740 pounds / 336 kg
NPS 12 x 6 / DN 300 x 150: 1265 pounds / 574 kg

Construction Materials

Type EGR Main Valve

Body and Body Flange: Cast iron, WCC steel
(standard), or CF8M Stainless steel (optional)
Seat Ring and Valve Plug: 416 Stainless steel
(standard) or 316 Stainless steel (optional)
Spring: Steel (standard) or Inconel® X750 (NACE)

O-Rings and Seals: Nitrile (NBR) (standard),
Fluorocarbon (FKM),

Peruoroelastomer (FFKM) (optional)

Cage: Linear CF8M Stainless steel (standard),
416 Stainless steel Whisper Trim™ Cage (optional),
or 316 Stainless steel Whisper Trim Cage (NACE)

Type 1098 Actuator
Lower Diaphragm Case: Steel (standard) or

Stainless steel
Upper Diaphragm Case: Steel (standard) or
Stainless steel
Bonnet: Steel (standard) or Stainless steel (NACE)
Diaphragm and O-Rings: Nitrile (NBR) (standard),
Fluorocarbon (FKM), or
Ethylenepropylene (EPDM) (optional)

1. End connections other than U.S. standard can usually be provided; consult your local Sales Ofce.

2. The pressure/temperature limits in this Bulletin and any applicable standard or code limitation should not be exceeded.
Inconel® is a mark owned by Special Metals Corporation.

- continued -

2

Specications (continued)

Bulletin 74.1:1190

Type Y191A Pilot

Body, Spring Case, and Diaphragm Casing:

Ductile iron (standard) or Stainless steel (optional)
Orice: 303 Stainless steel (standard) or
316 Stainless steel (NACE)
Spring: Steel (standard)
Diaphragm: Nitrile (NBR) (standard) Fluorocarbon

(FKM), or Nitrile (NBR) with Polytetrauoroethylene

(PTFE) diaphragm protector (optional)
O-Rings, Gaskets, and Seals:
Nitrile (NBR) (standard), Fluorocarbon (FKM),
Peruoroelastomer (FFKM), or
Ethylenepropylene (EPDM) (optional)
Disk: Nitrile (NBR) (standard), Fluorocarbon
(FKM), or Ethylenepropylene (EPDM) (optional)
Disk Holder: 303 Stainless steel (standard)

Type 95H Supply Pressure Regulator

Body and Spring Case: Cast iron (standard),
steel, steel (NACE), and Stainless steel (optional)
Orice: 416 Stainless steel (standard) or
316 Stainless steel (NACE)
Valve Plug: 416 Stainless steel with Nitrile (NBR)
(standard), 416 Stainless steel with
Fluorocarbon (FKM), or 316 Stainless steel
with Neoprene (CR) (NACE)
Stem Assembly: 416 Stainless steel (standard) or
316 Stainless steel (NACE)
Lower Spring Seat: Aluminum
Upper Spring Seat: Steel
Spring: Steel
Diaphragm: Neoprene (CR) (standard) or
Fluorocarbon (FKM) (optional)

or 316 Stainless steel (NACE)

1. End connections for other than U.S. standard can usually be provided; consult your local Sales Ofce.

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

Table 1. Main Valve Body Sizes and End Connection Styles

MAIN VALVE BODY SIZES MAIN VALVE END CONNECTION STYLE

NPS DN Cast Iron WCC Steel or CF8M Stainless Steel

1, 2 25, 50 NPT, CL125 FF, or CL250 RF anged

3, 4, 6 80, 100, 150 CL125 FF or CL250 RF anged

8 x 6, 12 x 6 200 x 150, 300 x 150 - - - -

NPT, SWE, BWE, CL150 RF,

CL300 RF, CL600 RF, or PN 16/25/40 anged

BWE, CL150 RF, CL300 RF,

CL600 RF, or PN 16 anged

BWE, CL150 RF, CL300 RF,

CL600 RF anged, or PN 25

Table 2. Outlet Pressure Ranges (Type Y191A Pilot)

0.6 to 6
5 to 17
12 to 40

34 to 83

76 to 172

(1)

(2)

(2)

SPRING

PART NUMBER

1B558527052
1B653827052
1B653927022

1B537027052
1B537127022
1B537227022
1B537327052

SPRING

COLOR

Orange

Red

Unpainted

Yellow
Green

Light blue

Black

SPRING WIRE DIAMETER SPRING FREE LENGTH

0.072

0.085

0.105

0.114

0.156

0.187

0.218

1.83

2.16

2.67

2.90

3.96

4.75

5.54

3.78

3.63

3.75

4.19

4.06

3.94

3.98

OUTLET PRESSURE RANGE

Inches w.c. mbar Inches mm Inches mm

2 to 7
5 to 16

(2)

(2)

172 mbar to 0.31 bar

0.31 to 0.48 bar

0.25 to 2.5

0.5 to 1.2 psig

1.1 to 2.5 psig

2.5 to 4.5 psig

4.5 to 7.0 psig

1. Outlet pressure ranges based on pilot being installed with the spring case pointed down.

2. Do not use Fluorocarbon (FKM) diaphragm with this spring at diaphragm temperatures lower than 60°F / 16°C.

96.0

92.1

95.3

106
103
100
101

3

Bulletin 74.1:1190

TYPE 95H SUPPLY
REGULATOR

TYPE 1098-EGR
MAIN VALVE

TYPE Y191A PILOT

SETPOINT
ADJUSTMENT

B2328_3

INLET PRESSURE
OUTLET PRESSURE

LOADING PRESSURE

PILOT SUPPLY PRESSURE

ATMOSPHERIC PRESSURE

Figure 2. Operational Schematic

Principle of Operation

The Type 1190 gas blanketing regulator reduces a
high-pressure inert gas to maintain a positive
low-pressure of blanket gas over a stored liquid while
liquid is being pumped out of the tank. Also, when
the tank suddenly cools causing tank vapors to
condense, the Type 1190 regulator replaces the
condensing vapors with an inert gas to prevent the
internal tank pressure from decreasing. In both
cases, a positive tank pressure prevents outside air
from entering the vessel preventing contamination
and reducing the possibility of atmospheric pressure
collapsing the vessel.

The Type 1190 regulator is pilot-operated. It responds
to slight decreases in internal tank pressure by throttling

open to increase the ow rate of inert gas into the vessel.

When the vessel’s liquid level has been lowered to the
desired point and the vapor pressure re-established, the
Type 1190 regulator throttles closed.

CONTROL LINE

FIXED
RESTRICTION

DOWNSTREAM
BLEED LINE

GAS BLANKETING

PRESSURE

The Type 1190 regulator utilizes a Type 1098-EGR
main valve actuator (Type EGR main valve and
Type 1098 actuator), a Type Y191A sensing pilot,
and a Type 95H supply pressure regulator. The
Type Y191A pilot uses the high-pressure inlet gas,
reduced by a Type 95H supply pressure regulator,
as loading pressure to operate the Type 1098-EGR
main valve actuator. The outlet or vessel pressure is
sensed through a control line on the Type 1098-EGR
main valve actuator and also on the Type Y191A
pilot diaphragm.

When the liquid level is decreased and vessel
pressure decreases below the pilot control spring
setting, the pilot spring force on the pilot diaphragm
opens the pilot valve plug, allowing additional loading
pressure to the main valve actuator diaphragm. The
loading pressure opens the main valve plug to supply

the required ow of gas to the vessel.

4