Spirax Sarco UTD30 Series User manual

IM-IBR15-23-IN Issue 1
1
UTD30
1. Safety information
2. General
product information
3. Installation
4. Commissioning
5. Operation
6. Maintenance
7. Spare parts
© Copyright 2016
Printed in India
IM-IBR15-23-IN
Issue 1
UTD30 Series
of Thermodynamic Steam Traps
Installation and Maintenance Instructions

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1. Safety information
Safe operation of these products can only be guaranteed if they are properly
installed, commissioned, used and maintained by qualied personnel (see Section
1.11) in compliance with the operating instructions. General installation and safety
instructions for pipeline and plant construction, as well as the proper use of tools
and safety equipment must also be complied with.
1.1 Intended use
Referring to the Installation and Maintenance Instructions, name-plate and Technical
Information Sheet, check that the product is suitable for the intended use/application.
These products comply with the Indian Boiler Regulations, 1950.
i) These products have been specically designed for use on steam, air or condensate/
w a t e r . T h e p r o d u c t s ’ u s e o n o t h e r  u i d s m a y b e p o s s i b l e b u t , i f t h i s i s c o n t e m p l a t e d ,
Spirax Sarco should be contacted to conrm the suitability of the product for the
application being considered.
ii) Check material suitability, pressure and temperature and their maximum and
minimum values. If the maximum operating limits of the product are lower than
those of the system in which it is being tted, or if malfunction of the product
could result in a dangerous overpressure or overtemperature occurrence, ensure
a safety device is included in the system to prevent such over-limit situations.
iii) Determine the correct installation situation and direction of uid ow.
iv) Spirax Sarco products are not intended to withstand external stresses that may
be induced by any system to which they are tted. It is the responsibility of the
installer to consider these stresses and take adequate precautions to minimise
them.
v) Remove protection covers from all connections and protective lm from all name-
plates, where appropriate, before installation on steam or other high temperature
applications.
1.2 Access
Ensure safe access and if necessary a safe working platform (suitably guarded)
before attempting to work on the product. Arrange suitable lifting gear if required.
1.3 Lighting
Ensure adequate lighting, particularly where detailed or intricate work is required.
1.4 Hazardous liquids or gases in the pipeline
Consider what is in the pipeline or what may have been in the pipeline at some previous
time. Consider: ammable materials, substances hazardous to health, extremes of
temperature.

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1.5 Hazardous environment around the product
Consider: explosion risk areas, lack of oxygen (e.g. tanks, pits), dangerous gases,
extremes of temperature, hot surfaces, re hazard (e.g. during welding), excessive
noise, moving machinery.
1.6 The system
Consider the effect on the complete system of the work proposed. Will any proposed
action (e.g. closing isolation valves, electrical isolation) put any other part of the
system or any personnel at risk?
Dangers might include isolation of vents or protective devices or the rendering
ineffective of controls or alarms. Ensure isolation valves are turned on and off in a
gradual way to avoid system shocks.
1.7 Pressure systems
Ensure that any pressure is isolated and safely vented to atmospheric pressure.
Consider double isolation (double block and bleed) and the locking or labelling of
closed valves. Do not assume that the system has depressurised even when the
pressure gauge indicates zero.
1.8 Temperature
Allow time for temperature to normalise after isolation to avoid danger of burns.
1.9 Tools and consumables
Before starting work ensure that you have suitable tools and/or consumables
available. Use only genuine Spirax Sarco replacement parts.
1.10 Protective clothing
Consider whether you and/or others in the vicinity require any protective clothing
to protect against the hazards of, for example, chemicals, high/low temperature,
radiation, noise, falling objects, and dangers to eyes and face.
1.11 Permits to work
All work must be carried out or be supervised by a suitably competent person.
Installation and operating personnel should be trained in the correct use of the
product according to the Installation and Maintenance Instructions.
Where a formal 'permit to work' system is in force it must be complied with. Where
there is no such system, it is recommended that a responsible person should know
what work is going on and, where necessary, arrange to have an
assistant whose primary responsibility is safety.
Post 'warning notices' if necessary.
1.12 Handling
Manual handling of large and/or heavy products may present a risk of injury. Lifting,
pushing, pulling, carrying or supporting a load by bodily force can cause injury
particularly to the back. You are advised to assess the risks taking into account the
task, the individual, the load and the working environment and use the appropriate
handling method depending on the circumstances of the work being done.

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1.13 Residual hazards
In normal use the external surface of the product may be very hot. If used at the
maximum permitted operating conditions the surface temperature of some products
may reach temperatures of 400 °C (752 °F).
Many products are not self-draining. Take due care when dismantling or removing
the product from an installation (refer to 'Maintenance instructions').
1.14 Freezing
Provision must be made to protect products which are not self-draining against
frost damage in environments where they may be exposed to temperatures below
freezing point.
1.15 Disposal
Unless otherwise stated in the Installation and Maintenance Instructions, this
product is recyclable and no ecological hazard is anticipated with its disposal
providing due care is taken.
1.16 Returning products
Customers and stockists are reminded that under EC Health, Safety and Environment
Law, when returning products to Spirax Sarco they must provide information on
any hazards and the precautions to be taken due to contamination residues or
mechanical damage which may present a health, safety or environmental risk. This
information must be provided in writing including Health and Safety data sheets
relating to any substances identied as hazardous or potentially hazardous.

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2. General product information
2.1 General description
All bodies for both series of traps have an electroless nickel preparation nish (ENP) which
is both energy efcient and corrosion resistant. All traps are tted by two screws to a
permanently installed stainless steel pipeline connector to ensure the maintenance is both
quick and easily undertaken. Traps can be removed/replaced using a simple wrench with
minimum system downtime.
UTD30 series
The UTD30 is a stainless steel thermodynamic steam trap with integral strainer. It is at tached
to a suitable pipeline connector by two bolts for quick and easy replacement.
UTD30L - Low capacity for mains drainage and tracing applications.
UTD30LA - Low capacity for mains drainage and tracing applications plus anti-air-binding
disc.
UTD30H - For higher capacity applications.
UTD30HA - For higher capacity applications plus anti-air-binding disc.
Optional extras
Insulating cover - To protect the trap operation from the effects of wind and rain. Fitting this
cover will increase the operational life of the trap under these conditions.
Standards
These products fully comply with the Indian Boiler Regulations, 1950.
Certication
These products are available with IBR certication and a manufacturers Typical Test Report.
Note: All cer tication/ inspec tion requirements must be stated at the time of order plac ement.
Note:
For additional information see TI-IBR15-24-IN.
2.2 Sizes and pipe connections
The UTD30 can be tted to a variety of different pipeline connectors which include:-
PC10HP Straight connector ANSI/ASME 600
PC3_ Connector with one piston isolation valve ANSI/ASME 600
PC4_ Connector with two piston isolation valves ANSI/ASME 600

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Groove identies UTD30LA versions
UTD30LA and UTD30HA anti-air-binding disc
Fig. 1 UTD30L shown
tted to a PC10HP connector

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Temperature °C
Pressure bar g
B
C
Steam
saturation
curve
2.3 Pressure/ temperature limits (ISO 6552)
A
UTD30L, UTD30H, UTD30LA and UTD30HA
Temperature °F
Pressure psi g
The product must not be used in this region.
For optimum product performance the PMO should not exceed 30 bar g.
A - CUTD30L and UTD30H
B - CUTD30LA and UTD30HA
Note: The model of pipeline connector and connection selected will dictate the maximum
operating limits of the complete assembly. Please consult the relevant Technical Information
Sheet for the specific pipeline connector for this information.
Body design conditions PN50
PMA Maximum allowable pressure 50 bar g @ 38 °C (725 psi g @ 100 °F)
TMA Maximum allowable temperature 400 °C @ 27.5 bar g (752 °F @ 399 psi g)
Minimum allowable temperature 0°C (32 °F)
PMO Maximum operating pressure
for saturated steam service 30 bar g (435 psi g)
TMO
Maximum
operating
temperature
UTD30L and UTD30H 400 °C @ 27.5 bar g (752 °F @ 399 psi g)
UTD30LA and UTD30HA 255 °C @ 30 bar g (491 °F @ 435 psi g)
Minimum operating temperature
Note: For lower operating temperatures consult Spirax Sarco. 0°C (32 °F)
ΔPMX Maximum differential pressure 30 bar (435 psi g)
PMOB Maximum operating backpressure should not exceed 80% of the upstream pressure
Minimum inlet pressure for satisfactory operation 0.25 bar g (4 psi g)
Designed for a maximum cold hydraulic test pressure of 75 bar g (1088 psi g)

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3. Installation
Note: Before actioning any installation observe the 'Safety information' in Section 1.
Referring to the Installation and Maintenance Instructions, name-plate and Technical
Information Sheet, check that the product is suitable for the intended installation:
3.1 Check materials, pressure and temperature and their maximum values. If the maximum
op erating limit of t he p roduc t is lower than t hat of the system in whic h it is bein g t ted,
ensure that a safety device is included in the system to prevent overpressurisation.
3.2 Determine the correct installation situation and the direction of uid ow.
3.3 R e m o v e p r o t e c t i v e c o v e r s f r o m a l l c o n n e c t i o n s a n d p r o t e c t i v e  l m f r o m a l l n a m e - p l a t e s ,
where appropriate, before installation on steam or other high temperature applications.
3.4 The UTD30 can be installed on any pipeline connector, but must be installed
in a horizontal plane with the strainer cap pointing downwards. See separate Installation
and Maintenance Instructions for Spirax Sarco pipeline connectors.
Ensure that both gaskets are clean and undamaged and that the transfer holes are
clear. Place the trap body against the connector gasket face, ensuring that the top
cap is uppermost and the trap itself is horizontal.
Apply a small amount of anti-seize compound to the threads of the connector
screws (3). Tighten the screws nger tight until the mating gasket faces are in parallel,
intimate contact. Tighten the screws to the recommended torque value (see Table 1,
page 12). Open isolation valves slowly until normal operating conditions are achieved.
3.5 Check for leaks.
3.6 If the trap is to discharge to atmosphere ensure it is to a safe place, the discharging
uid may be at a temperature of 100 °C (212 °F).
Fig. 3 Correct installations Strainer cap
After installation or maintenance ensure that the system is fully functioning. Carry out tests on
any alarms or protective devices.
4. Commissioning

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5. Operation
The UTD30 is a thermodynamic steam trap which use a disc to control the release of
condensate and to trap steam. The trap cycles open and closed to discharge condensate
close to steam temperature and closes tight between discharges. The disc, which is the
only moving part, rises and falls in response to dynamic forces produced by the partial re-
evaporation (ashing) of hot condensate. Cool condensate, air and other non-condensible
gases enter the trap through the central orice, lif t the disc, and are discharged through the
outlet orice. When the condensate approaches steam temperature, a portion of it ashes
as it enters the trap. The ash steam passes at high velocity over the underside of the disc
and collects in the control chamber above. The resulting pressure imbalance forces the
disc downward onto the seating sur faces, stop ping the ow. The trap remains tightly closed
until the loss of heat through the trap body lowers the control chamber pressure, allowing
the inlet pressure to raise the disc and repeat the cycle. An insulating cover prevents
the trap being unduly inuenced by excessive heat loss when subjected to low ambient
temperatures, wind, rain, etc.
Note: Before actioning any maintenance programme observe the 'Safety information'
in Section 1.
Warning
The inner and outer gaskets used when installing / maintaining the UTD30 to a PC_
pipeline connector contain thin stainless steel support rings which may cause physical
injury if not handled and disposed of carefully.
6.1 General information
Before undertaking any maintenance on the trap it must be isolated from both the supply line
and return line and any pressure allowed to safely normalise to atmosphere. The trap should
then be allowed to cool. When reassembling, ensure that all joint faces are clean.
6.2 Replacement of the trap unit:
- Ensure that the correct tools and necessary protective equipment are used at all times.
- Replacement of the trap unit is achieved by removing the two connector screws (10) and
removing the trap.
- Th e new tra p uni t sho uld be p ositi one d against t he c o nn ector g asket fac e an d apply a small
amount of anti-seize compound to the threads of the connector screws.
- Tighten screws nger tight and ensure that the trap body is parallel to the connector.
- Tighten the screws to the recommended torque (see Table 1, page 12).
- Open isolation valves slowly until normal operating conditions are achieved.
- Check for leaks.
6. Maintenance

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6.3 How to repair or replace the disc/seat:
- Remove the insulating cover (14) if tted and unscrew the cap (2) using a suitable socket
or spanner. Do not use Stillsons or a wrench of a similar type which may cause distortion
of the cap.
- If the disc (3) and body seating faces are only slightly worn, they can be refaced by lapping
individually on a at surface such as a surface plate. A gure-of-eight motion and a little
lapping compound give the best results.
If the wear is too great to be rectied by simple lapping, the seating faces on the body must
be ground at and then lapped. The total amount of metal removed in this way should not
exceed 0.25 mm (0.010"). The disc (3) should then be renewed.
- When reassembling, the disc (3) i s nor m ally p l a c e d with t h e g ro ov e d side i n c o ntact w i t h t h e
seating f ac e s. The screw- on c ap does n ot require a gas ket, b ut a suitable hig h te mperature
anti-seize grease should be applied to the threads. Tighten to the recommended torque
(see Table 1, page 12).
- Open isolation valves slowly until normal operating conditions are achieved.
- Check for leaks.
Fig. 4
3
14
10 1112
2
Seating face

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6.4 How to clean or replace the strainer screen
UTD30:
- Unscrew the strainer cap (6) using a spanner.
- Withdraw the screen (5) and clean, or if damaged replace with a new one.
- To reassemble, insert the screen (5) into
the cap (6), then screw the cap into place.
Note: A fine smear of 'Molybdenum
Disulphide' grease should be applied
to the rst few threads. Care should be
taken to ensure that the gasket and gasket
faces are clean. Tighten the cap (6) to the
recommended torque (see Table 1).
- Open isolation valves slowly until normal
operating conditions are achieved.
- Check for leaks.
Table 1 Recommended tightening torque
Item or
mm Nm (Ibf ft)
2L and LA 36 A/F 135 -150 (99 -110)
H and HA 41 A/F 135 -150 (99 -110)
632 A/F M28 170 -190 (125 -140)
824 A/F 50 -55 (37 -40)
10 " A/F 30 -35 (22 -26)
10
2
Fig. 5
5
7
6

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The spare parts available are shown in solid outline. Parts drawn in a grey line are not
supplied as spares.
Available spares
Complete trap unit assembled (state unit nomenclature), excluding pipeline connector.
Connector screws and gasket 10, 11, 12
Disc (packet of 3) UTD30L and UTD30H 3
Strainer screen UTD30L and UTD30H 5
Disc and strainer screen UTD30LA and UTD30HA 3,5
Strainer screen gasket 7
Insulating cover 14
Always order spare parts by using the description given in the column headed 'Available
spares' and state the size and type of trap.
Example 1: Packet of 3 discs for a Spirax Sarco UTD30L steam trap.
Example 2: Strainer screen for a Spirax Sarco UTD30H steam trap.
7. Spare parts
Fig. 6
3
14
10 1112
5
7

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