Armstrong GP-2000R Petunjuk Pemasangan, Pengoperasian, dan Pemeliharaan - Halaman 2

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Halaman Cetak
Spring Chart
Relieving Pressure
3 to 21 psig
14 - 157 psig
143 - 200 psig
Confirm the valves before and after the regulator are
closed, including the valve in the control pipe. Also, make
sure that no pressure and drainage remains inside of the
regulator.
Disassembly
Pilot valve (Figure 3-1)
1. Slightly loosen lock nut (28) and turn adjusting screw
(27) counterclockwise to release adjusting spring (24)
(no compression).
2. Remove bolts (37) of spring housing (3). Remove the
spring housing, spring, top spring plate (25), bottom
spring plate (26), and pilot diaphragms (23).
3. Remove seal bellows (61) using a ring spanner or
socket wrench and remove gasket (62), pilot valve (63),
and pilot valve spring (64).
4. Remove pilot valve seat (65) using a socket wrench.
Main valve (Figure 3-1)
1. Remove pipe A (34) at fitting (30A) and tee (33).
2. For nominal sizes 1/2" to 1-1/2", remove bolts (38) of
pilot body (2). Dismount the pilot body from the body
(1). And remove screen (15), spring plate (14), main
valve spring (13) and main valve (6). For series 2" to
6", remove bolts of adapter plate and adapter from the
main body (1). Remove main valve spring (13) and
main valve (6).
Main diaphragm (Figure 3-1)
1. Remove pipe C (36) at tee (33).
2. Remove bolts (41) of bottom diaphragm case (5).
Dismount the bottom diaphragm case, main dia-
phragms (12), retainer (11), and spindle (9). Check that
spindle moves up and down freely and that no particu-
late or scale build-up is obstructing its performance.
Reassembly
1. Check that there is no damage on the main valve,
main valve seat, pilot valve, and pilot valve seat. If any
scratches exist on the seating surface of valve seat,
they may cause an increase in outlet pressure and
excess temperature. When any scratches exist on
the main valve and valve seat, carry out lapping to
remove them. If it is not possible to remove them,
replace with new parts. When any scratches exist on
the pilot valve and valve seat, replace with new parts.
Color Code
Yellow
Green
Brown
2. Move the sliding section (pilot valve, main spindle,
etc.) two to three times and confirm they move
smoothly. If they do not move smoothly, original
performance may be affected.
3. Replace gaskets with new ones when disassembling.
Steam may leak if gaskets are reused.
4. After the main valve, spring, and spring plate are
assembled correctly, mount the main diaphragm.
Incorrect assembly may affect the original perfor-
mance.
5. Carry-out re-assembling in reverse order of disassem-
bling. Tighten all hexagon bolts evenly on each bolt in
turn of diagonal position. When re-assembling the
product in the wrong order, proper function may not be
possible. Uneven tightening of bolts may cause
leakage of steam.
New Tubing Set-Up
The external tubing for our GP-2000R series has been
modified to enhance the performance of these models.
The following explains the difference between the old and
new tubing assembly. It is important to have these fittings
in the correct location in order to get optimum performance
from these valves. It is very important that the old and new
tubing assemblies are not mixed. The location of all
fittings is critical and should not vary from the assembly
instructions.
New Type Tubing
Figure 5-1
B-Tube
Fitting B
New Type Tubing
Fitting A
Groove
Tee
(has to be on top)
Fitting
Orifice
(Reduced Port)
Elbow
Note: Fittings and tee are to be located in similar positions
for all GP-2000 models.
2
Fitting A
A-Tube
Tee
C-Tube
Elbow
Old Type Tubing
Fitting A
Tee
Check Mark
Fitting B
Orifice
(Reduced Port)
Elbow