Trillium SARASIN-RSBD STARFLOW P Series Instruction manual

FLOW CONTROL
P SERIES (STARFLOWTM)
Installation, Operation,
Maintenance Manual

CONTENT
1 SAFETY INSTRUCTIONS...................................................................................................................................................... 3
2 SAFETY PRECAUTIONS ...................................................................................................................................................... 4
3 WARRANTY INFORMATION ................................................................................................................................................ 5
4 TERMINOLOGY ..................................................................................................................................................................... 6
5 GENERAL ADVICE ............................................................................................................................................................... 7
5.1 RESPONSIBILITIES ........................................................................................................................................................ 7
5.2 IDENTIFICATION PLATE ................................................................................................................................................ 7
5.3 SPRING ........................................................................................................................................................................... 8
5.4 STORAGE ........................................................................................................................................................................ 9
5.5 HANDLING ....................................................................................................................................................................... 9
6STARFLOW BASICS ............................................................................................................................................................. 10
6.1 DESCRIPTION ................................................................................................................................................................. 10
6.2 FEATURES AND NOMENCLATURES...................................... ............................................................................................ 11
7INSTALLATION ..................................................................................................................................................................... 13
7.1 GENERAL ........................................................................................................................................................................ 13
7.2 INLET PIPING .................................................................................................................................................................. 13
7.3 OUTLET PIPING .............................................................................................................................................................. 14
7.4 INSTALLATION ON THE PROTECTED EQUIPMENT ............................................................................................................ 14
7.5 OUTLET MANIFOLD DESIGN ......................................................................................................................................... 14
7.6 RECOMMENDATIONS .................................................................................................................................................... 15
7.7 OUTDOOR INSTALLATION ............................................................................................................................................ 15
7.8 INDOOR INSTALLATION ................................................................................................................................................ 15
7.9 SPECIAL CASE OF STEAM ............................................................................................................................................ 15
8MAINTENANCE..................................................................................................................................................................... 17
8.1 DISASSEMBLY ................................................................................................................................................................ 18
8.2 LAPPING .......................................................................................................................................................................... 22
8.3 ASSEMBLY ...................................................................................................................................................................... 25
9TESTING ................................................................................................................................................................................ 27
9.1 RECOMMENDATIONS .................................................................................................................................................... 27
9.2 SET PRESSURE AND ADJUSTMENT ON LINES................................................................................................................. 28
9.3 MANUAL LIFTING DEVICE ............................................................................................................................................. 33
9.4 CALIBRATION CHECK WITH ONLINE TESTING DEVICE ..................................................................................................... 34
9.5 VALVE SEALING ............................................................................................................................................................. 34
10 MAINTENANCE..................................................................................................................................................................... 34
11 TROUBLESHOOTING ........................................................................................................................................................... 35
12 SPARE PARTS ...................................................................................................................................................................... 36
13 DISMANTLING....................................................................................................................................................................... 36
14 GENUINE PARTS .................................................................................................................................................................. 37
15 CODIFICATION ...................................................................................................................................................................... 38
1|
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM

SAFETY SIGNS AND LABELS
Signs or labels are included throughout this document.
These signs or labels communicate the following messages:
•
•
•
•
The level of hazard seriousness
The nature of the hazard
The consequence of human or product interaction with the hazard
The instructions if necessary on how to avoid the hazard
The format is characterised by vertical panels. The panels include a signal word shown below which advises the
level of hazard seriousness
• DANGER
• WARNING
• CAUTION
• ATTENTION
DANGER
WARNING CAUTION ATTENTION
DANGER
Immediate danger which
WILL cause
serious personal injury
or death.
WARNING
Risk or dangerous
practice which
COULD cause
serious personal
injury or death.
CAUTION
Risk or dangerous
practice which
COULD cause
minor injuries.
ATTENTION
Risk or dangerous
practice which
COULD cause
damage to equipment.
2|
Never face the outlet of a
valve when it is discharging
as this may result in serious
personal injury or death
Be aware of all site safety
procedures to prevent the risk
of serious injury or death.
Protect yourself by wearing
the necessary protective
equipment to prevent
possible injury.
Use the proper lifting
equipment to avoid personal
injury or damage to
equipment.
www.trilliumflow.com
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM

1 SAFETY INSTRUCTIONS
WARNING CAUTION ATTENTION
Be aware of all site safety
procedures to prevent the risk
of serious injury or death.
Protect yourself by wearing
the necessary protective
equipment to prevent
possible injury.
Use the proper lifting
equipment to avoid personal
injury or damage to
equipment.
3|
• In order that the product may work as expected, ensure that it has been correctly installed, it is being correctly used
and it is correctly maintained and serviced.
• This document describes the main procedures which are necessary to satisfy to the essential safety requirements in
order to operate the product correctly and to comply with the International rules and regulations for the specified
pressure equipment.
• This document describes each essential step from the receipt of valves through the stages of installation, operation
and service. It is mandatory to ensure that anyone intervening with the product, directly or indirectly, is fully aware of
these steps. Pictograms are used to clearly advise of the potential dangers associated with the use of the product.
• Whilst this document is intended to be informative, it is important to understand that the safety messages provided
are not exhaustive. Trillium Flow TechnologiesTM & Industrial cannot possibly be aware of, evaluate or advise, all of the conceiv
able methods by which tasks might be performed, or of the possible hazardous consequences of each of those methods.
Consequently, anyone who uses a procedure and/or tool, which is not recommended by Trillium Flow TechnologiesTM and Industrial, or
deviates from Trillium Flow TechnologiesTM recommendations must be thoroughly satisfied that neither personal safety nor equipment
safety will be jeopardized by the method and/or tools which have been selected.
The installation, operation and maintenance of safety valves could be dangerous. During these activities personnel might be exposed
to direct or indirect injury risks from fluids which are at various high pressures and/or temperatures. Therefore, every precaution
should be taken to prevent injury to personnel during the performance of any procedure.
Any person who uses a safety valve shall be trained in all aspects of handling, installation, operation and service.
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM

2 SAFETY PRECAUTION
DANGER WARNING CAUTION
Never face the outlet of a
valve when it is discharging
as this may result in serious
personal injury or death
Never dismantle a valve in
line without making
absolutely sure there is no
remaining or residual
pressure
Protect yourself by wearing
the necessary protective
equipment to prevent
possible injury
A safety valve is a self-acting product. Always consider the potential dangers associated with the product and never
minimise them. Each plant or installation has its own safety rules. Be aware of them and follow them carefully.
•Never stand in front of the discharge side of a safety valve if the valve is operating or being tested.
•Always wear personal protective equipment (PPE): PPE should consist of but not be limited to ear protection, eye
protection, and the use of protective clothing (gloves, headgear, etc). Noise can be extremely high and can occur
suddenly. Steam and hot water can burn. Superheated steam is NOT visible.
•Always lower the operating pressure before making any adjustment to the valve. Always gag the valve before
making any ring setting adjustments.
•Before removing a valve for disassembly, ensure that there is no remaining pressure upstream the valve and
that the valve is isolated from the system pressure.
•Before performing each pop test on the safety valve, ensure that no personnel are close to the valve. The steam
which could escape during the operation could cause serious personal injury.
•When a lift test is performed using the lifting lever, be sure to use a rope or a chain whilst standing at a safe
distance away from the valve and any potential steam escapes.
•Valves under the operating pressure may relieve at any time. Never strike the body or tamper with the valve as
such practice could cause premature relief.
•Never modify or change the valves, especially when they are under pressure. It is essential that you inform
Trillium Flow TechnologiesTM in All instances if any machining of parts is to be considered. Deviation from
critical dimensions can adversely affect the performance of a safety valve
4|www.trilliumflow.com
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM

Trillium Flow TechnologiesTM warrants that its products (including performance) and work will meet the specifications
of the customer’s Purchase Order. If any issue arises whilst operating the product, the customer should inform Trillium
Flow TechnologiesTM as quickly as possible. A return to the original plant should then be considered in order for Trillium
Flow TechnologiesTM to inspect the product.
Trillium Flow TechnologiesTM cannot be held responsible for any incorrect sizing and selection of a valve if the original
specification supplied by the customer was incomplete or inaccurate.
Trillium Flow TechnologiesTM does not authorise any third parties (eg, non-Trillium Flow TechnologiesTM service centres)
to repair a product of Trillium Flow TechnologiesTM manufacture. Any customer allowing or sub-contracting the repair of
a Trillium Flow TechnologiesTM product which is still within its warranty period will do so entirely it at their own risk.
3 WARRANTY INFORMATION
5 |www.trilliumflow.com
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM

4 TERMINOLOGY
ACCUMULATION
The pressure increase over the maximum allowable working pressure of the vessel, expressed in pressure units or as a percentage of
maximum allowable working pressure (MAWP) or design pressure.
BACK PRESSURE
Back pressure is the static pressure existing at the outlet of a safety valve device due to pressure in the discharge system.
BLOWDOWN
The difference between actual popping pressure of a safety valve and actual reseating pressure expressed as a percentage of set
pressure, or in pressure units.
CDTP (COLD DIFFERENTIAL TEST PRESSURE)
The pressure at which a safety valve is adjusted to open on the factory test bench. The cold differential test pressure includes
corrections for the service conditions of backpressure or temperature or both.
CHATTER
Rapid and erratic motion of the disc from closed to open position. This phenomenon can create damage to the valve internals, the
main effect being on the disc and the nozzle components.
CLOSING PRESSURE
The value of decreasing inlet static pressure at which the valve disc re-establishes contact with the seat or nozzle, or at which the
lift becomes zero.
LIFT
The actual travel of the disc away from closed position when a valve is relieving. LEAK TEST PRESSURE Leak test pressure is the
specified inlet static pressure at which a quantitative seat leakage test is performed in accordance with a standard procedure.
MAWP (maximum allowable working pressure)
The maximum gauge pressure permissible at the top of a vessel in its normal operating position at the designated coincident
temperature specified for that pressure.
OPERATING PRESSURE
The pressure at which protected unit is working and at which the safety valve should be tight.
OVERPRESSURE
The pressure increase over the set pressure of a safety valve, usually expressed as a percentage of the set pressure.
POPPING PRESSURE
The value of increasing inlet static pressure at which the disc moves in the opening direction at a faster rate as compared with
corresponding movement at higher or lower pressures. It applies only to valves in compressible fluid service.
SET PRESSURE
Inlet gauge pressure at which the safety valve is set to open under relief conditions
SIMMER
The audible or visible escape of fluid between the seat and disc at an inlet static pressure below the popping pressure and at no
measurable capacity.
For the purpose of this manual, the following abbreviations, definitions and terms apply
6|www.trilliumflow.com
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM

FIGURE 1
7|
5 GENERAL ADVICE
5.1 RESPONSIBILITIES
The recommended practices indicated within this manual must be respected to prevent any potential damage to goods.
It is important that all points of advice are followed closely and are implemented by suitably qualified personnel.
Trillium Flow TechnologiesTM disclaims all responsibility for maintenance operations which may be performed by persons
who are either not suitably qualified or are not considered to be an accepted part the Trillium Flow TechnologiesTM
organisation.
5.2 IDENTIFICATION PLATE
The data shown on the identification plate (figure 1) should be referenced with all requests for work, or for the supply of
spare parts.
The identification plate bears the following information fields fulfilled according code and regulation requirements:
• Serial number (also stamped on the edge of the outlet flange)
• Safety valve type (model number)
• Inlet dimension - pressure class (rating)
• Outlet dimension - pressure class (rating)
• Orifice
• Set pressure
• Backpressure
• Identification number
• Spring identification numbe
www.trilliumflow.com
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM

8|
5.3 SPRING
The correct operation of a pressure relief valve depends upon its spring characteristics, resilience, and compression.
Good pressure relief valve operation requires:
• Effective and accurate lift
• Sufficient flow rating
• Quick closing (no damping effect when reseating)
The adjustment range of the spring must be within ± 5 % of the nominal value
Spring data should be obtained from Trillium Flow TechnologiesTM Sarasin-RSBD Aftersales Department. When
requesting information, please quote the serial number which is shown on the valve identification plate. Without this
number, it may not be possible to identify the original valve.
www.trilliumflow.com
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM

9|
5.4 STORAGE
ATTENTION ATTENTION
Never lift the valve
horizontally, or hook to the
lifting lever or the spring.
Always lift by using the lifting
eyes or sling.
Make sure the valve is not
dropped and does not receive
strikes.
Safety valves may be received several months before an actual plant start-up date. In order that the valve performance
is not adversely affected, it is important to follow some clear rules concerning storage and handling prior to
installation.
• It is recommended that the safety valves are stored in a clean and dry environment, protected from weather
conditions, the ingress of sand, dust, or any other solid particles or foreign matter.
• Wherever possible, the valves should be stored in their original packaging.
• Blanking plugs, thread protectors and plastic covers should only be removed at the point of
installation of the valve.
• Special attention should be given to flange gasket contact surfaces and machined threads.
Impact on these areas should be a voided.
5.5 HANDLING
According to procedure 20.02, the safety valve should be handled very carefully at all times whether they are in the
packed or unpacked condition. The valves should never be subjected to any impact or striking, either directly or
indirectly through the packaging.
Never lift or handle a safety valve by its lifting lever.
The valve should be moved and transported in the upright position at all times to maintain performance accuracy.
www.trilliumflow.com
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM

STARFLOW Inlet x Outlet Size Combinations (in.) Orifice Area (sq. in)
Inlet
Outlet
Actual
0.134
0.273
0.373
0.589
Flange
Flange
API 0.110 0.196 0.307 0.503 Rating Rating
ORIFICE
D
E
F
G
ASME B16.5
ASME B16.5
1 x 2
1 x 2
1
1
⁄
2
x 2
1
1
⁄
2
x 3
150
150
1 x 2
1 x 2
1
1
⁄
2
x 2
1
1
⁄
2
x 3
300
1 x 2
1 x 2
1
1
⁄
2
x 2
1
1
⁄
2
x 3
300
1 x 2
1 x 2
1
1
⁄
2
x 2
1
1
⁄
2
x 3
600
1
1
⁄
2
x 2
1
1
⁄
2
x 2
1
1
⁄
2
x 3
1
1
⁄
2
x 3
900
300
1
1
⁄ 2 x 2 1
1
⁄ 2 x 2 1
1
⁄ 2 x 3
2 x 3
1500
1
1
⁄
2
x 3
1
1
⁄
2
x 3
1
1
⁄
2
x 3
2 x 3
2500
STARFLOW Inlet x Outlet Size Combinations (in.) Orifice Area (sq. in)
Inlet
Outlet
Actual
0.881
1.457
2.097
3.284
4.093
4.987
7.215
12.91
17.81
28.87
46.75
70.10
Flange
Flange
API 0.785 1.287 1.838 2.853 3.6 4.3 4 6.38 11.05 16 26 N/A N/A Rating Rating
ORIFICE
H
J
K
L
M
N
P
Q
R
T
V
W
ASME B16.5
ASME B16.5
1
1
⁄
2
x 3
2 x 3
3 x 4
3 x 4
4 x 6
4 x 6
4 x 6
6 x 8
6 x 8
8 x 10
10 x 14
12x12x12
150
150
1
1
⁄
2
x 3
2 x 3
3 x 4
3 x 4
4 x 6
4 x 6
4 x 6
6 x 8
6 x 8
8 x 10
10 x 14
12x12x12
300
2 x 3
3 x 4
3 x 4
4 x 6
4 x 6
4 x 6
4 x 6
6 x 8
6 x 10
8 x 10
10 x 14
12x12x12
300
2 x 3
3 x 4
3 x 4
4 x 6
4 x 6
4 x 6
4 x 6
6 x 8
6 x 10
-
-
-
600
2 x 3
3 x 4
3 x 6
4 x 6
4 x 6
4 x 6
4 x 6
-
-
-
-
-
900
2 x 3 3 x 4 3 x 6 4
x 6
-
-
-
-
-
-
-
-
1500
300
-
-
-
-
-
-
-
-
-
-
-
-
2500
Note: Inlet and outlet size combinations as well
as Orifice sizes shown in the table above are
compliant with API standard 526
– Latest edition .
10 |
6 STARFLOW BASICS
6.1 DESCRIPTION
Description STARFLOW RANGE
• Certified ASME Section VIII Div. 1 (stamp UV)
• Sizes: 1" x 2" to 12" x 12" x 12" (dual outlet)
• API STD 526 orifices from D to T
• Effective orifice areas from D (0.865 cm2) to W (452 cm2)
www.trilliumflow.com
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM

11 |
6.2 FEATURES AND NOMENCLATURES
Body design in accordance with ASME B16.34
• ASME B&PV Code section VIII div I design
o 10% overpressure
o Adjustable blowdown in between 7% (gas) and 20% (liquid)
• Full nozzle design
• Body inlet connection : Flanged
• Pressure rating : from class 150 to class 2500
www.trilliumflow.com
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM

Part
N° Part Name
S
PARE
P
ARTS
01 Body E
02 Bonnet E
04 Cap E
06 Nozzle E
07 Adjus�ng ring B
09 Guide C
11 Disc A
12 Spindle B
14 Adjus�ng screw B
15
Adjus�ng screw
locknut
D
18 Retaining ring A
19 Balanced Bellows C
22
Adjus�ng ring
screw
B
35 Bonnet stud D
37 Bellows plate C
40
Body/bonnet
gasket
A
41 Bonnet/cap gasket A
42
Adjus�ng ring
screw gasket
A
45
Spring washers
(upper & lower)
C
46 Spring C
50 Nut D
56 Disc holder C
FIGURE 2
04
37
12
50
76
02
45
35
46
14
19
56
11
22
06
01
32
15
41
40
42
07
09
18
62
Note: Spare parts chapter 12
12 |www.trilliumflow.com
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM

DANGER WARNING CAUTION CAUTION
Never face the outlet of a
valve when it is
discharging as this may
result in serious personal
injury or death
Protect against high noise
levels which occur during
popping tests. Keep a
safe distance when the
test is being performed.
Helmets and gloves must
be worn to prevent any
injures while operating or
working on the valve.
Be aware that the
environment might be
extremely hot. Care should
be taken if there is any
potential steam leakage.
Superheated steam is
invisible
13 |
7 INSTALLATION
7.1 GENERAL
7.2 INLET PIPING
Piping systems and equipment through which the fluid flows must be thoroughly cleaned. Dust, deposits and metal particles must
be removed using controlled blasts of compressed air or steam.
The presence of any solid particles between the safety valve and its seat faces will have damaging effects. Any leak will lead to
improper functioning and erosion of the seating surfaces. Such erosion develops quickly, due to the high pressure. The system
should always be purged before safety valve is installed.
Prior to installation of the safety valves, all protective covers must be removed. It is recommended that any surfaces in contact with
gaskets are checked. Dimensions of gaskets should be checked: gaskets must not obstruct inlet or outlet orifices.
A pressure relief valve will only operate correctly if all installation procedures are observed.
If the inlet pressure drop is excessive, it may generate chattering effect during operation of the valve. Chattering may in turn be the
cause of seat damage, or spindle deformation.
In order to avoid chattering, the following recommendations should be followed to reduce pressure drop:
• A rounded concentric reducer from the installation will create a minimum of turbulence.
• The inlet piping must be as short as possible and direct.
• A safety valve must not be installed on piping which has a nominal diameter of less than the nominal inlet diameter
of the safety valve.
• The safety valve must not be subjected to excessive vibration which might be transmitted by the installation.
www.trilliumflow.com
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM

14 |
7.3 OUTLET PIPING
The safety valve must not support either the weight or the installation stresses of the outlet piping. The backpressure
should be reduced by using outlet piping with a nominal diameter at least equal to the nominal diameter of the safety
valve outlet flange, together with large radius elbow.
Recommendations for steam applications
• The inside diameter of the exhausting piping must not be less than that of the safety valve outlet.
• Release should be in the upwards direction and, a means of draining must be available in the
lower angle to prevent any accumulation in the body.
• The connection curve to the vertical piping must be as close as possible to the safety valve outlet flange. The
easiest solution is for the elbow to be bolted directly to the safety valve flange.
• The radius of the elbow must be as great as possible, ie, at least R ≥2.5 d.
7.4 INSTALLATION ON THE PROTECTED EQUIPMENT
• Installation on a pressure vessel
The opening in the vessel wall to accept the safety relief valve must be designed to give direct flow and there must be
no obstruction between the vessel and the safety relief valve.
• Installation on equipment to be protected
The safety relief valve must be mounted on the upper part of the equipment protected, especially if the safety relief
valve is releasing gas or steam.
When releasing liquid, the safety relief valve must be installed on the lower part of the equipment.
7.5 OUTLET MANIFOLD DESIGN
In the case of an installation with several safety relief valves, outlet manifold dimensions must be such that the sum of
the backpressures generated is less than the value accepted by the safety relief valve which accepts the least
backpressure.
Separate manifolds must be installed for operation with both low and high pressures.
If the safety relief valves only operate consecutively, the relevant manifold dimensions must be at least equal to those
of the safety relief valve with the greatest flow rate. Great care must be taken with the calculations determining
interdependent operation between the safety relief valves, and the possibility of their being open at the same time.
www.trilliumflow.com
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM

15 |
7.6 RECOMMENDATIONS
• The safety relief valve must always be installed in the vertical position.
• The safety relief valve must be subjected to no stress whatsoever from piping.
• The outlet reaction force requires the use of reinforcement on the inlet piping connections, to support dynamic
loading due to the outlet.
• The lifting lugs are destined for the handling of the valve. They must not be used to lift the apparatus upstream or
downstream of the valve. They should be dismantled once the valve is put into operation.
7.7 OUTDOOR INSTALLATION
A safety valve which is installed outdoors must be protected against any inclement environmental conditions to ensure that it
will provide the highest level of safety and will operate in the most effective & responsive manner.
If the safety valve is exposed to hazardous weather conditions, ingress of dirt or other foreign matter or any extremes of
temperature conditions, please ensure that:
• The body is insulated from the inlet neck to the top of the body. Excessive variations in temperature may affect the set
pressure or the body structure (thermal stress).
7.8 INDOOR INSTALLATION
In case of an open bonnet, the outlet of the safety valve should not be connected to any equipment which might allow steam to
be ejected though the top cover and might in turn add risk of injury to personnel working close to the valve.
The opening of the valve can cause the projection of undirected fluid. The installation should be designed so that access to the
area around the valve is limited or we advise you to connect the outlet flange.
7.9 SPECIAL CASE OF STEAM
When the fluid to be relieved is steam, and in the case of long outlet piping, in order to achieve full safety requirements, the
piping should be in two parts. This arrangement considerably reduces the stresses between the piping and its support.
The safety relief valve body must be permanently drained, by connecting the drain orifice, on the lower part of the body, to that
on the drip tank, as shown in the diagram below.
www.trilliumflow.com
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM

It is necessary to use a torque wrench to tighten the inlet and outlet flange bolting.
1. A check should be made that the gasket is centered on the flange
2. Tighten to 30% of the nominal torque according to the following figures:
Continue to tighten alternatively until the required torque is reached. This should be done in 3 or 4 steps.
NOTE: Due to the relaxation of the gasket, it should be checked it 24 to 48 hours after the first installation.
DA (mm)
DB (mm)
DC (mm)
25
50
150
40
80
200
30
80
200
66
100
220
80
150
270
100
150
270
150
200
320
200
250
370
250
300
420
FIGURE 4
FIGURE 5
16 |www.trilliumflow.com
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM

8 MAINTENANCE
DANGER CAUTION CAUTION
Never face the outlet of a
valve when it is
discharging as this may
result in serious personal
injury or death. There
should be zero pressure at
the valve inlet prior to
commencement of any
work which is to be
performed.
Any person who is
working on the valve
should be aware of any
potential dangers such
as retained heat)
Helmets and gloves must
be worn to prevent any
injures while operating or
working on the valve.
A regular visual inspection is recommended to make sure about the good visible condition of the safety
relief valve.
•If the safety relief valve includes a relieving device, it can be necessary to plan periodic tests of
manoeuvrability according the inspection department recommendation. At least one test a year is
recommended.
•If the safety valve is installed on a compressible fluid, a simmer would warn about a leakage.
•If the safety valve is closed, with an open bonnet (or yoke) and installed on a steam line, a steam
escape by the top of the valve body will warn about a leakage.
The whole maintenance operations should be achieved by qualified technicians. This is the responsibility of
the end -user to make sure about the functioning of the valve as well as the safety of the operator.
17 |www.trilliumflow.com
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM

8.1 DISASSEMBLY
• Remove the lifting device, where applicable.
• Remove the cap (4).
• Unscrew the lock nut (15) and then unscrew the adjustment screw (14) until it is no longer
compressing the spring. To facilitate subsequent pre-adjustment of the safety relief valve, mark the
po sition of the adjustment screw (14).
04
14
15
1 8
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM
www.trilliumflow.com

19
• Unscrew nut (50) and take off bonnet stud (35)
• Remove the bonnet (2), the bearing (104) (if there’s one) the spring and washers (46-45) and the stem (12).
50
35
12
02
46
45
104
SARASIN-RSBD
STARFLOW SAFETY RELIEF VALVE
TM
TM
www.trilliumflow.com