2
T208 Series
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 flat 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 (2 required)
3
Spring Case
4
Lower Casing
5* Orifice
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
16 Lever Assembly
17 Machine Screw
(2 required)
18 Guide Insert
19 Upper spring seat
(2)
20 Lock Nut
(2)
22 Closing Cap
23 Hex Nut (8 required)
24 Cap Screw (8 required)
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 (2 required)
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.
