Emerson FISHER T208 Series User manual

Introduction
This installation guide provides instructions for
installation, startup and adjustment. To receive a
copy of the instruction manual, contact your local
Sales Office or view a copy at www.fisher.com.
For further information refer to: T208 Series Tank
Blanketing Vapor Recovery Regulators Instruction
Manual, D103752X012.
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.
Specifications
Available Configurations
Type T208: Tank blanketing vapor recovery
regulator with control pressure range of 5 mbar to
0.48 bar / 2 in. w.c. to 7 psig in six different spring
ranges and has internal pressure registration
requiring no control line.
Type T208M: Similar to Type T208 but has a
blocked throat and a control line connection for
external pressure registration.
Body Sizes and End Connection Styles
See Table 1
Maximum Allowable Inlet (Casing) Pressure(1)
See Table 1
Maximum Outlet Pressure(1)
2.4 bar / 35 psig
Maximum Emergency Inlet Pressure to Avoid
Internal Parts Damage(1)
With Nitrile (NBR), Ethylene
Propylene Diene (EPDM) or
Fluorocarbon (FKM) diaphragm:
2.4 bar / 35 psig
With Fluorinated Ethylene Propylene (FEP)
diaphragm: 0.69 bar / 10 psig
Control Pressure Ranges(1)
See Table 2
Shutoff Classification per ANSI/FCI 70-3-2004
Class VI (Soft Seat)
Pressure Registration
Type T208: Internal
Type T208M: External
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
EPDM: -29 to 107°C / -20 to 225°F
Perfluoroelastomer (FFKM):-18 to 149°C /
0 to 300°F
Body Materials
Gray Cast Iron: -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
▲ WARNING
Only qualified 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 fluid 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 fluid 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
Specifications 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.
PRODUCT SIZE CATEGORY FLUID TYPE
DN 20 and 25 / NPS 3/4 and 1 SEP 1
1. The pressure/temperature limits in this Installation Guide and any applicable standard or code limitation should not be exceeded.
2. See Table 3 for operating temperature ranges for available trim combinations.
T208 Series
Installation Guide
D103752X014
English – November 2022

Additionally, physical damage to the
regulator could result in personal injury
and property damage due to escaping
fluid. 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 flanged bodies, use suitable
line gaskets and approved piping and bolting practices.
Install the regulator in any position desired(1), unless
otherwise specified, but be sure flow through the body
is in the direction indicated by the arrow on the body.
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
traffic 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.
Overpressure Protection
Recommended pressure limitations are stamped on
the regulator nameplate. Vapor recovery regulators are
used to maintain a constant inlet (blanket) pressure
with the outlet flowing to a system whose pressure is
lower than that at the inlet. The recovery regulators
are not intended to be used as an ASME certified
relief device for overpressure protection on a tank.
They are to be used as part of a gas blanketing
system to control outflow of blanketing gas under
normal conditions and collect tank vapors for the
vapor disposal reclamation system. Provide alternate
methods of emergency overpressure protection.
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 relief valves properly adjusted, slowly
open the upstream and downstream shutoff valves.
Adjustment
To change the control pressure, perform the
following procedure.
For internal flat circular adjusting screw:
1. Remove the closing cap (key 22).
2. Use a 25 mm / 1-inch hex rod or at screwdriver to
turn the adjusting screw (key 35) either clockwise
to increase control pressure or counterclockwise to
decrease control pressure. The regulator will go into
immediate operation. To ensure correct operation,
always use a pressure gauge to monitor the vapor
recovery 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 control pressure or counterclockwise
to decrease control pressure. Always use pressure
gauge to monitor the vapor recovery pressure when
making adjustments.
3. After making the adjustment, tighten the
locknut (key 20).
Taking Out of Service (Shutdown)
▲ WARNING
To avoid personal injury resulting from
sudden release of pressure, isolate the
regulator from all pressure before
attempting disassembly.
Parts List
Key Description
1 Body
2 Cap Screw
3 Spring Case
4 Lower Casing
5* Orice
6 Spring
7 Diaphragm Head
8 Pusher Post
9 Diaphragm Gasket
10* Diaphragm
11* Body Seal O-ring
12* Insert Seal O-ring
13* Disk Assembly
14 Stem
16 Lever Assembly
17 Machine Screw
18 Guide Insert
19 Upper spring seat(2)
20 Lock Nut(2)
22 Closing Cap
23 Hex Nut
24 Cap Screw
25* Closing Cap Gasket
Key Description
26 Vent Assembly
27 Pipe Plug
(Type T208 only)
30* Stem Seal O-ring
(Type T208M only)
31* Throat Seal O-ring
(Type T208M only)
34 Machine Screw
(Type T208M only)
35 Adjusting Screw
36 Washer
38 Cap Screw
41 Back Disk Spring
42* Back Body Seal O-ring
43 Back Body Cap
44 Disk Spacer
45* Diaphragm Head Gasket
46 Nameplate
47 Drive screw
48 Flow arrow
49 Backup Ring
50 Lower Spring Seat
51 NACE Tag (not shown)
52 Tag Wire (not shown)
*Recommended Spare Part
1. 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.
2. Use for optional external square head adjusting screw assembly recommended for 62 to 172 mbar / 0.9 to 2.5 psig, 90 to 310 mbar / 1.3 to 4.5 psig and 0.26 to 0.48 bar /
3.8 to 7 psig spring ranges only.
T208 Series
2

10
7
45
8
16
12
1149
42 17
44
L1
L2
L2
L1 L1
9
7
50
36
6
14 18
1341 5 35 38
10
7458
1612
3011
4942 1744
9
7
50
36
6
35
1418313441 5 38
L1
L1
L1 L1L1
L2 L2
20
19
35
22
6L2
22
3
26
24
23
27
4
25
46
47
48
43
1
2
ERSA02737
ERSA02738
ERSA02737
Figure 1. T208 Series Assembly
TORQUE:
1.6 TO 2.1 N•m /
14 TO 19 IN-LBS
TORQUE:
38.5 TO 53.1 N•m /
340 TO 470 IN-LBS
TORQUE:
6.8 TO 8.1 N•m /
60 TO 72 IN-LBS
TYPE T208 ASSEMBLY WITH INTERNAL PRESSURE REGISTRATION
TORQUE:
1.6 TO 2.1 N•m /
14 TO 19 IN-LBS
TORQUE:
38.5 TO 53.1 N•m /
340 TO 470 IN-LBS
TORQUE:
6.8 TO 8.1 N•m /
60 TO 72 IN-LBS
TYPE T208M ASSEMBLY WITH EXTERNAL PRESSURE REGISTRATION
TORQUE:
10.2 TO 14.2 N•m /
90 TO 126 IN-LBS
TORQUE:
38.5 TO 53.1 N•m /
340 TO 470 IN-LBS TORQUE:
10.2 TO 14.2 N•m /
90 TO 126 IN-LBS
EXTERNAL SQUARE HEAD
ADJUSTING SCREW ASSEMBLY OPTION(2)
APPLY LUBRICANT(1):
L1 = SILICONE GREASE
L2 = ANTI-SEIZE COMPOUND
1. Lubricants must be selected such that they meet the temperature requirements.
2. For 62 to 172 mbar / 0.9 to 2.5 psig, 90 to 310 mbar / 1.3 to 4.5 psig and 0.26 to 0.48 bar / 3.8 to 7 psig spring ranges only.
T208 Series
3

Table 1. Body Sizes, End Connection Styles and Maximum Allowable Inlet (Casing) Pressures
BODY SIZE BODY MATERIAL END CONNECTION
STYLES(1)
MAXIMUM ALLOWABLE INLET (CASING) PRESSURE
DN In. bar psig
20 or 25 3/4 or 1
Gray cast iron NPT 2.4 35
WCC Carbon steel
NPT, CL150 RF, CL300 RF or
PN 16/25/40 RF 5.2 75LCC Carbon steel
CF8M/CF3M Stainless steel(2)
1. All flanges are welded. Weld-on flange dimension is 356 mm / 14 inches face-to-face.
2. Pipe nipples and anges are 316 Stainless steel for anged body assemblies.
Table 2. Control Pressure Ranges and Spring Information
CONTROL PRESSURE RANGE SPRING PART NUM-
BER SPRING COLOR SPRING WIRE DIAMETER SPRING FREE LENGTH
mbar In. w.c. mm In. mm In.
5 to 17(1)(2) 2 to 7(1)(2) 1B653827052 Red 2.2 0.085 92.2 3.63
7 to 32(1)(2) 3 to 13(1)(2) 1B653927022 Unpainted 2.7 0.105 95.3 3.75
25 to 65 10 to 26 1B537027052 Yellow 2.9 0.114 109 4.31
62 to 172 0.9 to 2.5 psig 1B537127022 Green 4.0 0.156 103 4.06
90 to 310 1.3 to 4.5 psig 1B537227022 Light blue 4.8 0.187 100 3.94
0.26 to 0.48 bar 3.8 to 7 psig 1B537327052 Black 5.5 0.218 101 3.98
1. To achieve the published control pressure range, the spring case must be installed pointing down.
2. Do not use Fluorocarbon (FKM) diaphragm with this spring at diaphragm temperatures lower than 16°C / 60°F.
Table 3. Operating Temperature Ranges for Available Trim Combination
TRIM OPTION
CODE DIAPHRAGM MATERIAL DISK AND O-RING MATERIAL OPERATING TEMPERATURE RANGES
Standard 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
TN Fluorinated Ethylene Propylene (FEP) Nitrile (NBR) -29 to 82°C / -20 to 180°F
TV Fluorinated Ethylene Propylene (FEP) Fluorocarbon (FKM) 4 to 82°C / 40 to 180°F
TK Fluorinated Ethylene Propylene (FEP) Perfluoroelastomer (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
EE EPDM EPDM -29 to 107°C / -20 to 225°F
FDA(1) EPDM EPDM -29 to 107°C / -20 to 225°F
1. EPDM option available with FDA/USP Class VI approved/ADI-free elastomers (wetted components only).
D103752X014 © 2017, 2022 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 11/22.
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.
T208 Series
Facebook.com/EmersonAutomationSolutions
LinkedIn.com/company/emerson-automation-solutions
Twitter.com/emr_automation
[email protected]
Emerson Automation Solutions
For further information on the current
PED revision see Bulletin: D103053X012
or scan the QR code.
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]