Emerson Fisher T205 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 Ofce or view a copy at
www.fisher.com. For further information refer to: T205 Series
Tank Blanketing Regulators Instruction Manual, D103748X012.
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.
PRODUCT SIZE CATEGORIES FLUID TYPE
DN 20 and 25 / NPS 3/4 and 1 SEP 1
Specifications

Type T205: Tank blanketing regulator with control
pressure range of 2.5 mbar to 0.48 bar / 1 in. w.c. to 7 psig
in seven different spring ranges and has internal pressure
registration requiring no downstream control line.
Type T205M: Similar to Type T205 but has a blocked
throat and a downstream control line connection for
external pressure registration.
Type T205H: Similar to Type T205, except outlet (casing)
pressure rating equals the inlet rating (both 10.3 bar /
150 psig) and low temperature to -29°C / -20°F.
Type T205HM: Similar to Type T205M, except outlet
(casing) pressure rating equals the inlet rating (both
10.3 bar / 150 psig) and low temperature to -29°C / -20°F.
Body Sizes and End Connection Styles
See Table 1
Maximum Allowable and Operating Inlet Pressure(1)
See Tables 1 and 4
Maximum Outlet (Casing) Pressure(1)
Types T205 and T205M
Gray cast iron: 2.4 bar / 35 psig
WCC Carbon steel or
CF8M/CF3M Stainless steel: 5.2 bar / 75 psig
Types T205H and T205HM
WCC Carbon steel or
CF8M/CF3M Stainless steel: 10.3 bar / 150 psig
Outlet (Control) Pressure Ranges(1)
See Table 3

Class VI (Soft Seat)
Pressure Registration
Types T205 and T205H: Internal
Types T205M and T205HM: External
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. Not available for Types T205H and T205HM.
Material Temperature Capabilities(1)(2)
Elastomer Parts
Nitrile (NBR):
Types T205 and T205M: -40 to 82°C / -40 to 180°F
Types T205H and T205HM: -29 to 82°C / -20 to 180°F
Fluorinated Ethylene Propylene (FEP)(3): -29 to 82°C /
-20 to 180°F
Fluorocarbon (FKM)(3): 4 to 149°C / 40 to 300°F
Ethylene Propylene Diene (EPDM)(3): -29 to 107°C /
-20 to 225°F
Perfluoroelastomer (FFKM)(3): -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
CF8M/CF3M Stainless Steel: -40 to 149°C /
-40 to 300°F
Installation
!


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.

in the system, it indicates that service

out of service immediately may create a
hazardous condition.
Personal injury, equipment damage or

pressure containing parts may result if this
regulator is overpressured or is installed
where service conditions could exceed the

where conditions exceed any ratings of the
adjacent piping or piping connections.
To avoid such injury or damage, provide

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

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.
T205 Series
Installation Guide
D103748X014
English – June 2018

For anged bodies, use suitable line gaskets and approved
piping and bolting practices. Install the regulator in any
position desired(2), unless otherwise specied, but be sure
ow through the body is in the direction indicated by the
arrow on the body.

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

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
T205 Series regulators have 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
include relief valves, monitoring regulators, shut-off 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 relief valves properly
adjusted, slowly open the upstream and downstream
shutoff valves.
Adjustment
To change the control pressure, perform the
following procedure.

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
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 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 control pressure or counterclockwise to
decrease control 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).

!

To avoid personal injury resulting from sudden
release of pressure, isolate the regulator from
all pressure before attempting disassembly.
* Recommended spare part
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.
2. Not available for Types T205H and T205HM.
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
15* Cotter Pin
16 Lever Assembly
17 Machine Screw
18 Guide Insert
19 Upper Spring Seat(1)
20 Lock Nut(1)
22 Closing Cap
23 Hex Nut
24 Spring Case Cap Screw
25* Closing Cap Gasket
26 Vent Assembly
Key Description
27 Pipe Plug (Types T205
and T205H only)
30* Stem Seal O-ring
(Types T205M and
T205HM only)
31* Throat Seal O-ring
(Types T205M and
T205HM only)
32 Pitot Tube (Types T205
and T205H)
34 Machine Screw
(Types T205M
and T205HM only)
35 Adjusting Screw
36 Washer
38 Diaphragm Cap Screw
45* Diaphragm Head Gasket
46 Nameplate
47 Drive Screw
48 Flow arrow (not shown)
49 Backup Ring
50 Lower Spring Seat
51 NACE Tag (not shown)
52 Tag Wire (not shown)
54 Diaphragm Head
(not shown)
Table 1. Body Sizes, End Connection Styles and Maximum Allowable Inlet Pressures
BODY SIZE BODY MATERIAL (1)


 In. bar psig
20 or 25 3/4 or 1
Gray Cast Iron(2) NPT 10.3 150
WCC Carbon Steel NPT, CL150 RF, CL300 RF or PN 16/25/40 RF 13.8(3) 200(3)
CF8M/CF3M Stainless Steel(4)
1. All flanges are welded. Weld-on flange dimension is 356 mm / 14 in. face-to-face.
2. Not available for Types T205H and T205HM.
3. Inlet pressure is limited to 10.3 bar / 150 psig for Types T205H and T205HM.
4. Pipe nipples and flanges are 316 Stainless steel for flanged body assemblies.
T205 Series
2

9
7
50
36
6
38
35
14
18
15
32
5
10
7
45
8
16
17
11
49
17
13 12
L2
L1
L1
L2
10
7
45
8
16
17
12
30
11
49
15
13 L1
L1 L1
9
7
50
36
6
38
35
14
18
31
34
5L1 L2L2
20
19
6
35
22
L2
22
25
46
47
48
1
2
3
26
24
23
27
4
Figure 1. T205 Series Assembly
(1):


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.
ERSA02735
ERSA02735
ERSA02736
ERSA02736

TORQUE:


TORQUE:


TORQUE:


TORQUE:


TORQUE:


TORQUE:


TORQUE:


TORQUE:


TORQUE:




(2)
T205 Series
3

Table 3. Outlet (Control) Pressure Ranges

mbar In. w.c.
2.5 to 6.2(1)(2) 1 to 2.5(1)(2)
6.2 to 17(1) 2.5 to 7(1)
17 to 40 7 to 16
34 to 83 0.5 to 1.2 psig
83 to 172 1.2 to 2.5 psig
0.17 to 0.31 bar 2.5 to 4.5 psig
0.31 to 0.48 bar 4.5 to 7 psig
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 4. T205 Series Maximum Operating Inlet Pressure
ORIFICE SIZE
(1)

1 to 2.5 In. w.c.
Outlet (Control)
Pressure Setting


Outlet (Control)
Pressure Setting


Outlet (Control)
Pressure Setting

0.5 to 1.2 psig
Outlet (Control)
Pressure Setting

1.2 to 2.5 psig
Outlet (Control)
Pressure Setting


Outlet (Control)
Pressure Setting


Outlet (Control)
Pressure Setting
mm In. bar psig bar psig bar psig bar psig bar psig bar psig bar psig

3.2 1/8 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2)
6.4 1/4 8.62 125 12.1(2) 175(2) 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2)
9.5 3/8 4.14 60 5.52 80 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2)
13 1/2 2.07 30 2.76 40 8.62 125 10.3 150 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2)
14 9/16 1.38 20 2.07 30 6.89 100 8.62 125 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2)

3.2 1/8 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2)
6.4 1/4 6.89 100 10.3 150 10.3 150 10.3 150 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2)
9.5 3/8 2.76 40 5.52 80 10.3 150 10.3 150 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2)
13 1/2 2.07 30 2.76 40 8.62 125 10.3 150 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2)
14 9/16 1.38 20 1.03 15 6.89 100 8.62 125 13.8(2) 200(2) 13.8(2) 200(2) 13.8(2) 200(2)
1. At maximum inlet pressure, minimum achievable setpoints may vary based on process conditions.
2. Inlet pressure is limited to 10.3 bar / 150 psig for gray cast iron bodies and for Types T205H and T205HM.
 DIAPHRAGM MATERIAL  
Standard Nitrile (NBR)(2) Nitrile (NBR) Types T205 and T205M: -40 to 82°C / -40 to 180°F
Types T205H and T205HM: -29 to 82°C / -20 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(1) 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
1. Includes 316 Stainless steel trim parts.
2. Types T205 and T205HM are only available with Nitrile (NBR) diaphragm.
Table 2. T205 Series Trim Option Code
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T205 Series
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