Emerson T205 Przewodnik Instalacji Pobierz pdf (Strona 2)

T205 Series

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 outlet pressure, perform the

following procedure.



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 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).



WARNING

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.

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

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

Type T205 (6 required)

Type T205M (2 required)

18 Guide Insert

19 Upper Spring Seat

(1)

20 Lock Nut

(1)

22 Closing Cap

Key Description

23 Hex Nut (8 required)

24 Spring Case Cap Screw

(8 required)

25* Closing Cap Gasket

26 Vent Assembly

27 Pipe Plug

(Type T205 only)

30* Stem Seal O-ring

(Type T205M only)

31* Throat Seal O-ring

(Type T205M only)

32 Pitot Tube (Type T205)

34 Machine Screw

(Type T205M only)

35 Adjusting Screw

36 Washer

38 Diaphragm Cap Screw

45* Diaphragm Head Gasket

46 Nameplate

47 Drive Screw (2 required)

48 Flow arrow

49 Backup Ring

50 Lower Spring Seat

51 NACE Tag (not shown)

52 Tag Wire (not shown)

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

and Maximum Outlet (Casing) Pressure

BODY SIZE

BODY MATERIAL END CONNECTION STYLES

(1)

MAXIMUM ALLOWABLE AND

OPERATING INLET PRESSURE

MAXIMUM OUTLET

(CASING) PRESSURE

DN Inch bar psig bar psig

20 or

3/4 or

Gray Cast Iron NPT 10.3 150 2.4 35

WCC 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 inches face-to-face.

2. Pipe nipples and anges are 316 Stainless steel for anged body assemblies.

TRIM OPTION CODE DIAPHRAGM MATERIAL  OPERATING TEMPERATURE RANGES

Standard Nitrile (NBR) Nitrile (NBR) -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

(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.

Table 2. Operating Temperature Ranges for Available Trim Combination

1 2 3 4

T205 Series 1

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