Emerson FISHER T205B User manual

PRODUCT SIZE CATEGORY FLUID TYPE
DN 20 and 25 / 3/4 and 1 in. SEP 1
!
Installation Guide
D103750X014
English – June 2020
Type T205B
Introduction
This installation guide provides instructions for
installation, startup and adjustment. To receive a copy of
the instruction manual, contact your local Sales O󰀩ce or
view a copy at www.fisher.com. For further information,
refer to: Type T205B Balanced Tank Blanketing
Regulator Instruction Manual, D103750X012.
PED Categories
This product may be used as a safety accessory with
pressure equipment in the following Pressure Equipment
Directive categories. It may also be used outside of the
Pressure Equipment Directive using sound engineering
practice (SEP) per table below. For information on the
current PED revision see Bulletin: D103053X012.
Specications
Body Sizes and End Connection Styles
See Table 1
Maximum Allowable and Operating Inlet Pressure(1)
See Table 1
Maximum Outlet (Casing) Pressure(1)
See Table 1
Maximum Emergency Outlet Pressure to Avoid
Internal Parts Damage(1)
With Nitrile (NBR) or Fluorocarbon (FKM)
diaphragm: 2.4 bar / 35 psig
With Fluorinated Ethylene Propylene (FEP)
diaphragm: 0.69 bar / 10 psig
Outlet (Control) Pressure Ranges(1)
See Table 3
Shuto󰀨 Classication per ANSI/FCI 70-3-2004
Class VI (Soft Seat)
Material Temperature Capabilities(1)(2)
Elastomer Parts
Nitrile (NBR): -40 to 82°C / -40 to 180°F
Fluorinated Ethylene Propylene (FEP):
-29 to 82°C / -20 to 180°F
Fluorocarbon (FKM): 4 to 149°C / 40 to 300°F
Ethylene Propylene Diene (EPDM): -29 to 107°C /
-20 to 225°F
Peruoroelastomer (FFKM): -18 to 149°C /
0 to 300°F
Body Materials
Gray Cast Iron(3):-29 to 149°C / -20 to 300°F
WCC Carbon Steel: -29 to 149°C / -20 to 300°F
LCC Carbon Steel: -40 to 149°C / -40 to 300°F
CF8M/CF3M Stainless Steel: -40 to 149°C /
-40 to 300°F
Installation
Only qualied personnel shall install
or service a regulator. Regulators
should be installed, operated and
maintained in accordance with
international and applicable codes
and regulations and Emerson
Process Management Regulator
Technologies, Inc. instructions.
If the regulator vents uid or a leak
develops in the system, it indicates that
service is required. Failure to take the
regulator out of service immediately
may create a hazardous condition.
Personal injury, equipment damage
or leakage due to escaping uid
or bursting of pressure containing
parts may result if this regulator is
overpressured or is installed where
service conditions could exceed the
limits given in the Specications
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 (as required by the appropriate
code, regulation or standard) to
prevent service conditions from
exceeding limits.
Additionally, physical damage to the
regulator could result in personal injury
and property damage due to escaping
uid. To avoid such injury and damage,
install the regulator in a safe location.
Clean out all pipelines before installation of the
regulator and check to be sure the regulator has not
been damaged or has collected foreign material during
shipping. For NPT bodies, apply pipe compound
to the external pipe threads. For anged bodies,
use suitable line gaskets and approved piping and
bolting practices. Install the regulator in any position
desired(3), unless otherwise specied, but be sure ow
through the body is in the direction indicated by the
arrow on the body.
WARNING
1. The pressure/temperature limits in this Installation Guide and any applicable standard or code limitation should not be exceeded.
2. See Table 2 for operating temperature ranges for available trim combinations.
3. For proper operation to achieve the published capacities at low setpoint, the spring case barrel should be installed pointed down as shown in Figure 1.

Note
It is important that the regulator be
installed so that the vent hole in the
spring case is unobstructed at all times.
For outdoor installations, the regulator
should be located away from vehicular
tra󰀩c and positioned so that water,
ice and other foreign materials cannot
enter the spring case through the vent.
Avoid placing the regulator beneath
eaves or downspouts, and be sure it is
above the probable snow level.
BODY SIZE BODY MATERIAL END CONNECTION
STYLES(1)
MAXIMUM ALLOWABLE AND OP-
ERATING INLET PRESSURE
MAXIMUM OUTLET
(CASING) PRESSURE
DN In. bar psig bar psig
20 or
25
3/4 or
1
Gray Cast Iron NPT 10.3 150 2.4 35
WCC Carbon Steel
LCC Carbon Steel NPT, CL150 RF,
CL300 RF or PN 16/25/40 RF 13.8 200 5.2 75
CF8M/CF3M Stainless Steel(2)
1. All anges are welded. Weld-on ange dimension is 356 mm / 14 in. face-to-face.
2. Pipe nipples and anges are 316 Stainless steel for anged body assemblies.
!
2
Type T205B
Overpressure Protection
Type T205B regulator has an outlet pressure
rating lower than the inlet pressure rating. The
recommended pressure limitations are stamped on
the regulator nameplate. Some type of overpressure
protection is needed if the actual inlet pressure can
exceed the maximum operating outlet pressure
rating. Common methods of external overpressure
protection includes relief valves, monitoring
regulators, shut-o󰀨 devices and series regulation.
Overpressuring any portion of the regulators beyond
the limits in the Specications section may cause
leakage, damage to regulator parts or personal injury
due to bursting of pressure-containing parts.
Regulator operation below the maximum pressure
limitations does not preclude the possibility of damage
from external sources or debris in the line. The
regulator should be inspected for damage after any
overpressure condition.
Startup
The regulator is factory set at approximately
the midpoint of the spring range or the pressure
requested, so an initial adjustment may be required
to give the desired results. With proper installation
completed and regulator properly adjusted, slowly
open the upstream and downstream shuto󰀨 valves.
Adjustment
To change the outlet pressure, Perform the
following procedure.
For internal at circular adjusting screw:
1. Remove the closing cap (key 22).
2. Use a 25 mm / 1 in. hex rod or at screwdriver to
turn the adjusting screw (key 35) either clockwise
to increase outlet pressure or counterclockwise to
decrease outlet pressure. The regulator will go into
immediate operation. To ensure correct operation,
always use a pressure gauge to monitor the tank
blanketing pressure when making adjustments.
3. After making the adjustment, replace the closing
cap gasket (key 25) and install the closing cap
(key 22).
For external square head adjusting screw:
1. Loosen the locknut (key 20).
2. Turn the adjusting screw (key 35) either clockwise
to increase outlet pressure or counterclockwise to
decrease outlet pressure. Always use pressure
gauge to monitor the tank blanketing gas pressure
when making adjustments.
3. After making the adjustment, tighten the locknut
(key 20).
Taking Out of Service (Shutdown)
To avoid personal injury resulting from
sudden release of pressure, isolate the
regulator from all pressure before
attempting disassembly.
Table 1. Body Sizes, End Connection Styles, Maximum Allowable and Operating Inlet Pressures
and Maximum Outlet (Casing) Pressure
WARNING

10745
8
16171512
L1
30
L1
11
L1
4915
9
75036
6
38
35
L2
40
39
37
18
14
13
5
L2
20
19
6
35
22
L2
22
3
26
24
23
4
25
46
47
48
1
2
10745
8
16171512
L1
30
L1
11
L1
4915
9
75036
6
38
35
L2
40
39
37
18
14
13
5
L2
20
19
6
35
22
L2
22
3
26
24
23
4
25
46
47
48
1
2
10745
8
16171512
L1
30
L1
11
L1
4915
9
75036
6
38
35
L2
40
39
37
18
14
13
5
L2
20
19
6
35
22
L2
22
3
26
24
23
4
25
46
47
48
1
2
ERSA00627
3
Type T205B
Parts List
Key Description
1 Body
2 Cap Screw (2 required)
3 Spring Case
4 Lower Casing
5* Orice
6 Spring
7 Diaphragm Head (2 required)
8 Pusher Post
9* Diaphragm Gasket (for FEP diaphragm)
10* Diaphragm
11* Body Seal O-ring
12* Insert Seal O-ring
13* Disk Assembly
14 Stem
15* Cotter Pin (2 required)
16 Lever Assembly
17 Machine Screw (2 required)
18 Guide Insert
19 Upper Spring seat(1)
Key Description
20 Lock Nut(1)
22 Closing Cap
23 Hex Nut (8 required)
24 Spring Case Cap Screw (8 required)
25* Closing Cap Gasket
26 Vent Assembly
30* Stem Seal O-ring
35 Adjusting Screw
36 Washer
37* Backup Ring (2 required)
38 Diaphragm Head Cap Screw
39 Bias spring
40 Bias spring seat
45* Diaphragm Head Gasket
46 Nameplate
47 Drive Screw (2 required)
48 Flow Arrow
49 Backup Ring
50 Lower Spring Seat
Figure 1. Type T205B Assembly
1. Lubricants must be selected such that they meet the temperature requirements.
2. For 83 to 172 mbar / 1.2 to 2.5 psig, 0.17 to 0.31 bar / 2.5 to 4.5 psig and 0.31 to 0.48 bar / 4.5 to 7 psig spring ranges only.
APPLY LUBRICANT(1):
L1 = MULTI-PURPOSE PTFE LUBRICANT
L2 = ANTI-SEIZE COMPOUND
EXTERNAL SQUARE HEAD ADJUSTING
SCREW ASSEMBLY OPTION(2)
1. Use for optional external square head adjusting screw assembly recommended for 83 to 172 mbar / 1.2 to 2.5 psig, 0.17 to 0.31 bar / 2.5 to 4.5 psig and 0.31 to 0.48 bar / 4.5 to 7 psig
spring ranges only.
*Recommended spare part

OUTLET (CONTROL)
PRESSURE RANGE SPRING
PART NUMBER
SPRING
COLOR
SPRING WIRE DIAMETER SPRING FREE LENGTH
mbar In. w.c. mm In. mm In.
2.5 to 6.2(1)(2) 1 to 2.5(1)(2) 1B558527052 Orange 1.8 0.072 82.6 3.25
6.2 to 17(2) 2.5 to 7(2) 1B653827052 Red 2.2 0.085 92.2 3.63
17 to 40 7 to 16 1B653927022 Unpainted 2.7 0.105 95.2 3.75
34 to 83 0.5 to 1.2 psig 1B537027052 Yellow 2.9 0.114 109 4.31
83 to 172 1.2 to 2.5 psig 1B537127022 Green 4.0 0.156 103 4.06
0.17 to 0.31 bar 2.5 to 4.5 psig 1B537227022 Light Blue 4.8 0.187 100 3.94
0.31 to 0.48 bar 4.5 to 7 psig 1B537327052 Black 5.5 0.218 101 3.98
1. Do not use Fluorocarbon (FKM) diaphragm with this spring at diaphragm temperatures lower than 16°C / 60°F.
2. To achieve the published outlet pressure range, the spring case must be installed pointing down.
TRIM OPTION CODE DIAPHRAGM MATERIAL DISK AND O-RING MATERIAL OPERATING TEMPERATURE RANGES
Standard Fluorinated Ethylene Propylene (FEP) Nitrile (NBR) -29 to 82°C / -20 to 180°F
NN Nitrile (NBR) Nitrile (NBR) -40 to 82°C / -40 to 180°F
VV Fluorocarbon (FKM) Fluorocarbon (FKM) 4 to 149°C / 40 to 300°F
TV Fluorinated Ethylene Propylene (FEP) Fluorocarbon (FKM) 4 to 82°C / 40 to 180°F
TK Fluorinated Ethylene Propylene (FEP) Peruoroelastomer (FFKM) -18 to 82°C / 0 to 180°F
TE Fluorinated Ethylene Propylene (FEP) Ethylene Propylene Diene (EPDM) -29 to 82°C / -20 to 180°F
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Emerson Automation Solutions
Type T205B
For further information on the current
PED revision see Bulletin: D103053X012
or scan the QR code.
The distinctive diamond shape cast into every spring
case uniquely identifies the regulator as part of the
Fisher™ brand and assures you of the highest-quality
engineering, durability, performance, and support.
Fisher.com
Americas
McKinney, Texas 75070 USA
T [phone]
[phone]
Europe
Bologna 40013, Italy
T [phone]
Asia Pacic
Singapore 128461, Singapore
T [phone]
Middle East and Africa
Dubai, United Arab Emirates
T [phone]
D103750X014 © 2013, 2020 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 06/20.
The Emerson logo is a trademark and service mark of Emerson
Electric Co. All other marks are the property of their prospective owners.
Fisher™ is a mark owned by Fisher Controls International LLC, a
business of Emerson Automation Solutions.
The contents of this publication are presented for informational purposes
only, and while every e󰀨ort has been made to ensure their accuracy,
they are not to be construed as warranties or guarantees, express or
implied, regarding the products or services described herein or their
use or applicability. All sales are governed by our terms and conditions,
which are available upon request. We reserve the right to modify or
improve the designs or specications of such products at any time
without notice.
Emerson Process Management Regulator Technologies, Inc does not
assume responsibility for the selection, use or maintenance of any
product. Responsibility for proper selection, use and maintenance of any
Emerson Process Management Regulator Technologies, Inc. product
remains solely with the purchaser.
Table 2. Operating Temperature Ranges for Available Trim Combination
Table 3. Outlet (Control) Pressure Ranges and Spring Information