Emerson TARTARINI PS/79-1 User manual

Type PS/79-1 and PS/79-2 Pilots
Summary
Introduction ................................ 1
Characteristics.............................. 1
Labelling .................................. 2
Dimensions and Weight. . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Periodic Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SEP Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
ATEX Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 2
Maintenance ............................... 3
Spare Parts ................................ 4
Waste Disposal Requirements ................. 4
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Parts Lists ................................. 5
Schematic Assemblies. . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 1. Type PS/79-1 or PS/79-2 Pilots
Introduction
Scope of Manual
This manual provides installation, startup,
maintenance, troubleshooting, and spare parts for the
pilot series PS/79-1 and PS/79-2.
Product Description
Designed for pressure regulators control, the following
types are available:
• PS/79-1 - RE/79-1 - PSO/79-1 - REOPS/79-1
• PS/79-2 - RE/79-2 - PSO/79-2 - REO/79-2
Tightness cover version available on request
(e.g. Types PS/79-1-D and PS/79-2-D).
The full range of PS pilots can be installed in the
following pressure regulators:
FL Series - Cronos Series
This product has been designed to be used with fuel
gases of 1st and 2nd family according to EN 437, and
with other non aggressive and non fuel gases. For any
other gases, other than natural gas, please contact
your local sales agent.
Characteristics
APPLICATION ALLOWABLE
PRESSURE
PS, bar
SET RANGE
Wd, bar
BODY AND
COVERS
MATERIAL
Regulator or
Monitor
PS/79-1
20
0.01 - 0.5
Aluminum
PS/79-2 0.5 - 3
Table 1. Technical Features
1/4-inch NPT female threaded connections.
All PS/ series pilots are supplied with a filter (5μ
filtering degree) and built-in pressure stabilizer, with
the exception of Type PSO/79-1 and PSO/79-2 pilots
(supplied without stabilizer).
Type PS/79-1 and PS/79-2
Instruction Manual
D103590X012
June 2023

Type PS/79-1 and PS/79-2
2
APPARECCHIO TIPO /DEVICE TYPE
Wau
DN2
DN1
MATRICOLA
bar
bar
SERIALNr.
°C
FLUIDO GRUPPO
FLUIDGROUP
ANNO
YEAR
HARMONIZED STD.
bar
NORMEARMONIZ.
LEAKAGECLASS
CLASSEDI PERDITA
FUNCTIONALCLASS
CLASSEFUNZIONALE bar
Wao
Wa
TS
bar
pao
Cg
PS
body bar PT
=x
PS bar
PS
covers
EN
bar
pmax
BOLOGNAITALY
O.M.T.
1.5Note 4Note 3
Note 2
Note 1
1
-
145
270
Labelling Installation
a. Check that data on the pilot’s plate are compatible
with actual working conditions.
b. Install in accordance with regulator
instruction manual.
Startup
See the set-up and pilot adjustment instructions
applying to the equipment where the pilot is fitted.
Periodic Checks
Slowly close the outlet slam-shut and check line
pressure between it and regulator. A slight increase
in pressure should be detected: this results from
overload due to closing, and is followed by pressure
stabilization. If, however, outlet pressure continues
to rise, then seal is defective. Check if leak is coming
from regulator or pilot, and service.
Figure 3. Type PS/79-1 and PS/79-2 Pilots Dimensions, mm
TYPE PS/79-1 AND PS/79-2 FULL RANGE WEIGHT: 2.5 KG
Note 1: See “Characteristics”
Note 2: Year of Manufacture
Note 3: Class 1: -10 to 60°C
Class 2: -20 to 60°C
Note 4: See “Characteristics”
Figure 2. Label for Type PS/79-1 and PS/79-2 Pilots
Dimensions and Weight
SEP Statement
Emerson Process declares this product
conforms to Pressure Equipment Directive (PED)
2014/68/EU Article 4 Section 3 were designed and
manufactured in accordance to the Sound Engineering
Practice (SEP).
According to Article 4 Section 3, these “SEP” products
must not bear the CE marking.
ATEX Requirements
▲ WARNING
If the provisions of EN 12186 and
EN 12279, national regulations,
if any, and specific manufacturer
recommendations are not put into
practice before installation and if
purge by inert gas is not carried out
before equipment’s start-up and shut-
down operations, a potential external
and internal explosive atmosphere
can be present in equipment and
gas pressure regulating/measuring
stations/installations.
2

3
If a presence of foreign material in the pipelines is
foreseen and purge by inert gas is not carried out,
the following procedure is recommended to avoid any
possible external ignition source inside the equipment
due to mechanical generated sparks:
• drainage to safe area via drain lines of foreign
materials, if any, by inflow of fuel gas with low
velocity in the pipe-work (5 m/sec)
In any case,
• provisions of Directive 2009/104/CE and
2009/104/CE shall be enforced by gas pressure
regulating/measuring station/installation’s end user
• with a view to preventing and providing protection
against explosions, technical and/or organizational
measures appropriate to the nature of the
operation shall be taken (e.g.: filling/exhausting
of fuel gas of internal volume of the isolated part/
entire installation with vent lines to safe area
according to EN 12186 and EN 12279; monitoring
of settings with further exhaust of fuel gas to safe
area; connection of isolated part/entire installation
to downstream pipeline; ….)
• the test requirements of EN 12186 and EN 12279
shall be enforced by pressure regulating/
measuring station/installation’s end user
• external tightness test shall be carried out after
each reassembly at installation site using testing
pressure in accordance with national rules
• periodical check/maintenance for surveillance
shall be carried out complying with
national regulations, if any, and specific
manufacturer recommendations.
Replacing Stabilizer Diaphragm
and Seal Pad
b. Remove screws (key 54), cover (key 55), spring
(key 52) and diaphragm assembly (key 53, 51, 50,
49, 48 and 47). Replace diaphragm if necessary.
c. Unscrew seat (key 44) and replace pad holder
(key 45).
d. Reassemble by reversing the above sequence.
Replacing Valve Seal Pads
e. Remove plug (key 23) and seat (key 25). Slide out
spring (key 27), pad holder unit (key 29) and forked
stem (key 31).
f. Replace pad holder (key 29) and O-ring (key 32).
Maintenance
△ CAUTION
Servicing should be carried out by
qualified, skilled personnel only.
For further information, please contact
our Technical Support Representatives
or our authorized dealers.
Before servicing, cut off regulator inlet and outlet and
release any trapped pressurized gas. Use suds to
check that there are no leaks.
Replacing Filter
a. Remove screws (key 54), cover (key 58), and
replace felt (key 41). Reassemble by reversing the
above sequence.
g. Reassemble by reversing above sequence
General Maintenance
h. Proceed as directed in the replacement of lter,
stabilizer diaphragm and seal pad, and valve
seal pads.
i. Completely release spring (key 5) by turning the
adjusting screw (key 1) counterclockwise.
j. Remove screws (key 10) and cover (key 6).
k. Keep plate (key 8) blocked with a box wrench,
unscrew nut (key 7).
△ CAUTION
This must be done exactly as described
to prevent damage to or breaking of
drilled needle valve (key 17).
l. Unscrew plate (key 8) from stem (key 12) and slide
o󰀨 split pin (key 35).
m. In Types RE/79-1 and -2, remove locknut (key 15)
by means of an appropriate wrench and slide out
parts (key 62, 63, 16, and 17), make sure that the
surface of seat (key 61) is intact.
n. Replace any worn seals.
Reassembly
Lubricate the static O-rings with a thin layer of
Molykote®55 M, be very careful not to damage the
O-rings when reassembling. No other pilot parts are to
be lubricated.
Reassemble parts by reversing the above steps. As
you proceed, make sure that parts move freely and
without friction.
3
Type PS/79-1 and PS/79-2

Type PS/79-1 and PS/79-2
4
Troubleshooting
In addition:
o. Once lever (key 36) and stem (key 12) have been
mounted, check that, with stem (key 12) against
body (key 19), clearance between forked stem
(key 31) and register (A) of lever (key 36) is 0.2 to
0.3 mm If not, use register to correct.
▲ CAUTION
The above clearance can be checked by
gently pulling the stem (key 12) upward.
Use the proper tool to make sure that
support of diaphragm (key 9) on the
stem (key 12) is on the same plane as
that supporting the diaphragm (key 9) in
the body (key 19).
p. Mount diaphragm (key 9) and screw on plate
(key 8), rst by hand then with box wrench, always
keep diaphragm (key 9) rmly in place to avoid
damage to stem (key 12) and underlying levers.
q. Holding plate (key 8) rmly in place with box
wrench, tighten nut (key 7).
r. Before remounting cover (key 6), center
diaphragm as follows: mark a reference point
(with pencil) on the diaphragm; turn it to the right
without forcing and mark another reference on
body. Now turn diaphragm to the left and mark a
further reference. Position the diaphragm mark
midway between the two marks on the body.
s. Tighten all screws uniformly to ensure
proper sealing.
▲ CAUTION
The pilot has a wide range of self-
adjustment values. However, given
actual operating conditions, it may be
necessary to assist it at times by finding
the best setting of pin screw/register
(key 24) or the most suitable calibration
orifice (key 18).
Spare Parts
Spare parts storage shall be done by proper
procedures according to national standard/rules to
avoid over aging of rubber parts or any damage to
critical parts.
Waste Disposal Requirements
The disposal of waste and e-waste from packaging,
spare parts, lubricants, whole equipment/systems
and produced in occasion of on-site surveillance
activities (during service life and/or at the end of
their service life), shall be carried out in accordance
with the requirements of applicable local regulation
(laws and rules).
SYMPTOMS CAUSE ACTIONS
Desired set point is not reached
Calibration spring (key 5) is too weak Check the springs catalog and replace it with a stronger one
Leaks from pilot connections Check pilot feed connections and proper gas flow feeding
Outlet pressure drops well below set point
Filter (key 41) is clogged preventing proper
through-flow of gas Clean or replace filter
Pad holder (key 45) is swollen preventing
proper feed flow Replace pad holder
Pad holder (key 29) is swollen preventing
proper feed flow Replace pad holder
Outlet pressure increases over set point
Faulty sealing of pad holder (key 45) Replace pad holder
Faulty sealing of pad holder (key 29) Replace pad holder
Slow response to changes in gas demand
Insufficient flow rate of valve seat (key 25) Increase flow by means of register/pin screw (key 24)
Over large calibration jet (key 18)
(only for Types PS/79-1 and PS/79-2) Replace calibration jet with a smaller one
Overly rapid response to changes in gas
demand, i.e. Hunting
Excessive flow rate of valve seat (key 25) Reduce flow by means of a pin screw (key 24)
Calibration jet (key 18) is too small
(only for Types PS/79-1 and PS/79-2) Replace calibration jet with a larger one
Incorrect internal parts assembly Check clearance between lever (key 36) and valve seat (key 25)
Gas continually escaping from relief (S) Defective seal of pad (key 59)
(only for Types PS/79-1 and PS/79-2) Replace pad
Table 2. Troubleshooting for Type PS/79-1, PS/79-2, RE/79-1, and RE/79-2 Pilots
4

5
Parts Lists
Type PS/79-1, PS/79-2, RE/79-1 and
RE/79-2 Pilots (See Figure 4)
Item Description
1 Adjusting screw
2 Nut
3 Cap
4 Spring holder
5 Spring
6 Cover
7 Nut
8 Plate
9* Diaphragm
10 Screw
11* Gasket (for Types PS/79-1 and RE/79-1 only)
12 Stem
13 Washer
14 Nut
15 Locking nut
16 Spring
17 Drilled needle valve
18 Jet
19 Body
20* O-ring
21 Plug
22* O-ring
23 Plug
24 Pin screw
25 Seat
26* O-ring
27 Spring
29* Pad holder unit
30 Spacer
31 Forked stem
32* O-ring
33* O-ring
34 Screw
35 Split pin
36 Lever unit
37 Data plate
38 Pin
39 Elastic ring
40* O-ring
41* Felt
42 Filter net
43 Spring
44 Seat
Type RE/79-1 and RE/79-2 Pilots Only
Item Description
17 Safety Valve
59* Pad
60* O-ring
61 Seat
62 Thrust bearing
63* “GACO” Ring
Type PS/79-1-D, PS/79-2-D,RE/79-1-D
and RE/79-2-D Pilots (See Figure 4)
Item Description
69* O-ring
70 Elastic ring
71* O-ring
Type REOPS/79-1 Pilot (See Figure 4)
Item Description
77 Body
Rubber parts marked with (*) are supplied in the
“spare parts kit”, recommended as stock.
To order the kit it is necessary to communicate to us
the type of the pilot and its serial number.
Type PS/79-1, PS/79-2, RE/79-1 and
RE/79-2 Pilots (See Figure 4) (continued)
Item Description
45* Pad holder unit
46* O-ring
47 Screw unit
48* Diaphragm
49 Plate
50 Washer
51 Washer
52 Spring
53 Autolocking nut
54 Screw
55 Cover
56 Plug
57* O-ring
58 Filter cover
5
Type PS/79-1 and PS/79-2

Type PS/79-1 and PS/79-2
6
40 54 41
42
58
4854
55
38 3939
40 54 41
42
58
4344454647484954
50
53
55
52
51
A
A
40 54 41
42
58
4854
55
434445464749
50
53
52
51
M
V
1 2
3
4
5
6
7
9 10 11
8
12
13
1415
16
18
18
17
19
20
21
2223
24255657
37
35
36
34
33
32
31
30
29
2827
26
B
R
A
77
39 38 3939 38 39
PARTIAL SECTION C-C
TYPE PS/79-1-2 AND RE/79-1-2
SECTION A-A TYPE PS/79-1-2
TYPE REOPS/79-1 AND REO/79-2 TYPE PSO/79-1-2
DETAIL REOPS/79-1 DETAIL
REOPS/79-1
Figure 4. Type PS/79-1, PS/79-2, and RE/79-2 Pilots Assemblies
Schematic Assemblies
6

7
15
63
62
16
17
59
60
61
19
1
71
3
69
6
70
73 74
S
TYPE RE/79-1-2
TYPE
PS/79-1-D
RE/79-1-D
PS/79-2-D
RE/79-2-D
Figure 4. Type PS/79-1, PS/79-2, and RE/79-2 Pilots Assemblies (continued)
CODE CONECTIONS
M Upstream of the regulator
R To the regulator (loading pressure)
S Downstream or safe area
V Downstream of the regulator
Table 3. Type PS/79-1 and PS/79-2 Pilot Connections
7
Type PS/79-1 and PS/79-2

Chelyabinsk 454003, Russia
T 8 800 200 16 55
[phone]
Type PS/79-1 and PS/79-2
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D103590X012 © 2015, 2023 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 06/23.
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The contents of this publication are presented for informational purposes
only, and while every e󰀨ort has been made to ensure their accuracy,
they are not to be construed as warranties or guarantees, express or
implied, regarding the products or services described herein or their
use or applicability. All sales are governed by our terms and conditions,
which are available upon request. We reserve the right to modify or
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without notice.
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assume responsibility for the selection, use or maintenance of any
product. Responsibility for proper selection, use and maintenance of any
Emerson Process Management Regulator Technologies, Inc. product
remains solely with the purchaser.
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