Emerson T205 Instruction Manual

Instruction Manual D103748X012

September 2020

T205 Series

T205 Series Tank Blanketing Regulators

Table of Contents

Introduction .................................................................. 1

Specifications .............................................................. 2

Principle of Operation .................................................. 4

Installation ................................................................... 4

Overpressure Protection.............................................. 6

Startup, Adjustment and Shutdown .............................6

Maintenance ................................................................ 7

Parts Ordering ........................................................... 10

Parts List....................................................................10

Figure 1. Type T205 Tank Blanketing Regulator

WARNING

▲

Failure to follow these instructions or to properly install and maintain this equipment could result in an explosion,

re and/or chemical contamination

causing property damage and personal injury or death.

Fisher™ regulators must be installed, operated and maintained in accordance with federal, state and local codes, rules and regulations and Emerson Process Management Regulator Technologies Inc. (Emerson) instructions.

If the regulator discharges process

uid or a leak develops in the system, service to the unit may be required.

Failure to correct trouble could result in a hazardous condition.

Call a qualied service person to service

the unit. Installation, operation and maintenance procedures performed by

unqualied person may result

in improper adjustment and unsafe operation. Either condition may result in equipment damage or personal injury.

Only a qualied person must install or service the T205 Series regulator.

Introduction

Scope of the Manual

This Instruction Manual provides instruction for installation, startup, maintenance and parts ordering information for the T205 Series tank blanketing regulators.

Product Description

T205 Series tank blanketing regulator is a directoperated and spring-loaded regulator. The regulator prevents a stored liquid from vaporizing into the atmosphere, reduces liquid combustibility and prevents oxidation or contamination of the product by reducing its exposure to air. T205 Series maintains a slightly positive pressure and thereby reduces the possibility of tank wall collapse during pump out operation.

T205 Series

Specications

The Specications section on this page provides the ratings and other specications for the T205 Series. Factory specication such as type, maximum inlet pressure, maximum temperature, maximum outlet pressure, spring range and orice size are stamped on the nameplate fastened on the regulator at the factory.

Product Congurations

Type T205: Tank blanketing regulator with outlet

pressure range of 1 in. w.c. to 7 psig / 2.5 mbar

to 0.48 bar in seven di󰀨erent 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 150 psig / 10.3 bar) and low temperature to

-20°F / -29°C.

Type T205HM: Similar to Type T205M, except

outlet (casing) pressure rating equals the inlet rating (both 150 psig / 10.3 bar) and low temperature to -20°F / -29°C

Body Sizes and End Connection Styles

See Table 1

Maximum Allowable Inlet Pressure

(1)

See Table 1

Maximum Operating Inlet Pressure

(1)

See Table 2

Maximum Outlet (Casing) Pressure

(1)

Types T205 and T205M

Gray cast iron: 35 psig / 2.4 bar WCC Carbon steel, LCC Carbon steel or CF8M/CF3M Stainless steel: 75 psig / 5.2 bar

Types T205H and T205HM

WCC Carbon steel or CF8M/CF3M Stainless steel:

150 psig / 10.3 bar

Outlet (Control) Pressure Ranges

(1)

See Table 3

Shuto󰀨 Classication per ANSI/FCI 70-3-2004

Class VI (Soft Seat)

Pressure Registration

Types T205 and T205H: Internal Types T205M and T205HM: External

Material Temperature Capabilities

(1)(2)(4)

Elastomer Parts Nitrile (NBR):

Types T205 and T205M: -40 to 180°F / -40 to 82°C Types T205H and T205HM: -20 to 180°F /

-29 to 82°C

Fluorinated Ethylene Propylene (FEP)

(3)

-20 to 180°F / -29 to 82°C

Fluorocarbon (FKM) Ethylene Propylene Diene (EPDM)

(3)

: 40 to 300°F / 4 to 149°C

(3)

-20 to 225°F / -29 to 107°C

Peruoroelastomer (FFKM)

(3)

0 to 300°F / -18 to 149°C

Body Materials

Gray cast iron

(3)

: -20 to 300°F / -29 to 149°C WCC Carbon steel: -20 to 300°F / -29 to 149°C LCC Carbon steel: -40 to 300°F / -40 to 149°C CF8M/CF3M Stainless steel:

-40 to 300°F / -40 to 149°C

Spring Case Vent Connection

1/4 NPT

Diaphragm Case Control Line Connection (Types T205M and T205HM)

1/2 NPT

Approximate Weight

17.7 lbs / 8 kg

1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.

2. See Table 5 for operating temperature ranges for available trim combinations.

3. Not available for Types T205H and T205HM.

4. Special low temperature constructions for process temperatures between -76 to 180°F / -60 to 82°C are available by request. The low temperature construction passed Emerson laboratory testing for lockup and external leakage down to -76°F / -60°C.

Table 1. Body Sizes, End Connection Styles and Maximum Allowable Inlet Pressures

BODY SIZE

In. DN psig bar

3/4 or 1 20 or 25

1. All anges are welded. Weld-on ange dimension is 14 in. / 356 mm face-to-face.

2. Not available for Types T205H and T205HM.

3. Inlet pressure is limited to 150 psig / 10.3 bar for Types T205H and T205HM.

4. Pipe nipples and anges are 316 Stainless steel for anged body assemblies.

BODY MATERIAL END CONNECTION STYLES

Gray cast iron

WCC Carbon steel

LCC Carbon steel

CF8M/CF3M Stainless steel

(2)

(4)

CL300 RF or PN 16/25/40 RF

NPT 150 10.3

NPT, CL150 RF,

(1)

MAXIMUM ALLOWABLE INLET PRESSURE

(3)

200

13.8

(3)

T205 Series

ERSA02735

INLET PRESSURE

OUTLET PRESSURE

ATMOSPHERIC PRESSURE

VALVE DISK

STEM

LEVER

PUSHER POST

PITOT TUBE

CONTROL SPRING

Figure 2. Types T205 and T205H with Internal Registration Operational Schematics

PIPE PLUG

DIAPHRAGM

TYPE Y602-1 VENT

Table 2. T205 Series Maximum Operating Inlet Pressure

MAXIMUM OPERATING INLET PRESSURE

ORIFICE SIZE

1 to 2.5 In. w.c. /

2.5 to 6.2 mbar

Outlet (Control)

Pressure Setting

2.5 to 7 In. w.c. /

6.2 to 17 mbar

Outlet (Control)

Pressure Setting

7 to 16 In. w.c. /

17 to 40 mbar

Outlet (Control)

Pressure Setting

0.5 to 1.2 psig / 34 to 83 mbar

Outlet (Control)

Pressure Setting

In. mm psig bar psig bar psig bar psig bar psig bar psig bar psig bar

1/8 3.2 200

(2)

1/4 6.4 125 8.62 175

13.8

(2)

200

(2)

13.8

12.1

(2)

3/8 9.5 60 4.14 80 5.52 200

3/4 In. / DN 20 Body Size

(2)

200 200

13.8

(2)

13.8

(2)

13.8

(2)

200 200 200

(2)

13.8

(2)

1/2 13 30 2.07 40 2.76 125 8.62 150 10.3 200

9/16 14 20 1.38 30 2.07 100 6.89 125 8.62 200

1/8 3.2 200

(2)

13.8

(2)

200

(2)

13.8

(2)

200

(2)

1 In. / DN 25 Body Size

13.8

(2)

200

(2)

13.8

(2)

1/4 6.4 100 6.89 150 10.3 150 10.3 150 10.3 200 3/8 9.5 40 2.76 80 5.52 150 10.3 150 10.3 200 1/2 13 30 2.07 40 2.76 125 8.62 150 10.3 200

9/16 14 20 1.38 15 1.03 100 6.89 125 8.62 200

1. At maximum inlet pressure, minimum achievable setpoints may vary based on process conditions.

2. Inlet pressure is limited to 150 psig / 10.3 bar for gray cast iron bodies and for Types T205H and T205HM.

(1)

1.2 to 2.5 psig / 83 to 172 mbar

Outlet (Control)

Pressure Setting

(2)

200 200 200

200

13.8

(2)

13.8

(2)

13.8

(2)

13.8

(2)

13.8

(2)

13.8

(2)

13.8

(2)

13.8

(2)

13.8

(2)

13.8

(2)

2.5 to 4.5 psig /

0.17 to 0.31 bar

Outlet (Control)

Pressure Setting

(2)

200 200 200 200 200

13.8

(2)

13.8

(2)

13.8

(2)

13.8

(2)

13.8

(2)

13.8

(2)

13.8

(2)

13.8

(2)

13.8

(2)

13.8

(2)

4.5 to 7 psig /

0.31 to 0.48 bar

Outlet (Control)

Pressure Setting

(2)

200

(2)

200

(2)

200

(2)

200

(2)

200

(2)

200

(2)

200

(2)

200

(2)

200

(2)

200

Table 3. Outlet (Control) Pressure Ranges and Spring Information

OUTLET (CONTROL) PRESSURE RANGE

In. w.c. mbar In. mm In. mm

1 to 2.5

2.5 to 7

(1)(2)

(1)

2.5 to 6.2

6.2 to 17

(1)(2)

(1)

SPRING PART NUMBER SPRING COLOR

1B558527052 Orange 0.072 1.8 3.25 82.6 1B653827052 Red 0.085 2.2 3.63 92.2

7 to 16 17 to 40 1B653927022 Unpainted 0.105 2.7 3.75 95.2

0.5 to 1.2 psig 34 to 83 1B537027052 Yellow 0.114 2.9 4.31 109

1.2 to 2.5 psig 83 to 172 1B537127022 Green 0.156 4.0 4.06 103

2.5 to 4.5 psig 0.17 to 0.31 bar 1B537227022 Light Blue 0.187 4.8 3.94 100

4.5 to 7 psig 0.31 to 0.48 bar 1B537327052 Black 0.218 5.5 3.98 101

1. To achieve the published outlet 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 60°F / 16°C.

SPRING WIRE DIAMETER SPRING FREE LENGTH

13.8

(2)

T205 Series

VALVE DISK

ERSA02736

INLET PRESSURE

OUTLET PRESSURE

ATMOSPHERIC PRESSURE

O-RING STEM SEAL

THROAT SEAL

CONTROL SPRING

PUSHER POST

TYPE Y602-1 VENT

CONTROL LINE CONNECTION

Figure 3. Types T205M and T205HM with External Registration Operational Schematics

T205 Series is available in four congurations:

Types T205 and T205H for internal pressure registration requiring no downstream control line and Types T205M and T205HM which have a blocked throat and a downstream control line connection for external pressure registration.

Principle of Operation

T205 Series tank blanketing regulator controls the vapor space pressure over a stored liquid. When liquid is pumped out of the tank or vapors in the tank condense, the pressure in the tank decreases. Tank pressure is sensed by the actuator diaphragm. Spring force pushes the pusher post assembly upward, the

valve disk moves away from the orice, allowing the gas ow to increase to maintain tank pressure. See

Figures 2 and 3.

When pressure in the tank increases, the actuator diaphragm is pushed downward. Through the action of the pusher post assembly, lever and valve stem,

the valve disk moves closer to the orice reducing gas ow.

Installation

WARNING

▲

Personal injury, property damage, equipment damage or leakage due to

escaping gas or bursting of pressure-

containing parts may result if this regulator

is overpressured or 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.

Refer to Overpressure Protection section for recommendations on how to prevent service conditions from exceeding

those limits.

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.

HORIZONTAL PIPELINE

T205 Series

HORIZONTAL PIPELINE

B2626

INLET PRESSURE

OUTLET PRESSURE

ATMOSPHERIC PRESSURE

LOADING PRESSURE

TYPES T205 AND T205H TYPES T205M AND T205HM

Figure 4. T205 Series Actuator Casing Drainage Schematics

Additionally, physical damage to the regulator could cause personal injury or property damage due to escaping gas. To

avoid such injury or damage, install the

regulator in a safe location.

Note

If the regulator is shipped mounted on another unit, install that unit according to the appropriate Instruction Manual.

1. Only personnel qualied through training and

experience shall install, operate and maintain a regulator. For a regulator that is shipped separately, make sure there is no damage to or debris in the regulator. Also ensure that all tubing and piping are clean and unobstructed.

2. The regulator may be installed in any position as

long as the ow through the body is in the direction

indicated by the arrow on the body. When using a T205 Series regulator, 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. For complete actuator drainage, the regulator should be installed as shown in Figure 4. If continuous operation of the system is required during inspection or maintenance, install a three-valve bypass around the regulator.

WARNING

▲

A regulator may vent some gas to the atmosphere. In hazardous or ammable gas service, vented gas may accumulate

and cause personal injury, death or

property damage due to re or explosion.

VENT POINTED DOWN

DOWNSTREAM CONTROL LINE

Vent a regulator in hazardous gas service

to a remote, safe location away from air

intakes or any hazardous area. The vent

line or stack opening must be protected against condensation or clogging.

3. To keep the spring case vent (key 26, Figures 7 to 10) from being plugged or the spring case from collecting moisture, corrosive chemicals or other foreign material, point the vent down or otherwise protect it. The diaphragm casing (key 4, Figures 7 to 10) may be rotated in order to obtain desired positioning.

4. To remotely vent the regulator, remove the vent (key 26, Figures 7 to 10) and install obstructionfree tubing or piping into the 1/4 NPT vent tapping. Provide protection on a remote vent by installing a screened vent cap into the remote end of the vent pipe.

5. Types T205M and T205HM require a downstream control line. Be sure to install the control line before putting the regulator into operation. Make the control line as short and straight as possible and do not

install it in a location where ow may be turbulent.

Restrictions in the control line can prevent proper pressure registration. When using a hand valve, it

should be a full ow valve, such as a full port ball

valve. Install the control line sloping downward toward the tank to prevent condensation buildup and avoid low points (or traps) that could catch liquid. The sensing line must enter the tank above the liquid level at a point that senses the vapor space pressure and is free from turbulence associated with tank nozzles or vents. The control line pipe should be at least 1/2 in. / 13 mm in diameter and increase 1 pipe size for every 10 ft. / 3.05 m of control line, with setpoint less than 5 in. w.c. / 12 mbar.

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