IM-P015-04-EN-ISS2 CMGT
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1. Safety information
2. General product information
3. Installation
4. Commissioning
5. Operation
6. Maintenance
7. Spare parts
© Copyright 2018
Printed in GB
0686550/5
TD62LM and TD62M
Thermodynamic Steam Traps
with Replaceable Seats
Installation and Maintenance Instructions
IM-P015-04-EN-ISS2
CMGT
PREVIOUS REFERENCE NO. IM-P068-58
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Safe operation of these products can only be guaranteed if they are properly installed,
commissioned, used and maintained by qualified 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 requirements of the Pressure Equipment Directive (PED) and all fall within category 'SEP'.
It should be noted that products within this categor y are required by the Directive not to carry
the mark.
i) These products have been specifically designed for use on steam, air or condensate/water,
which is in Group 2 of the above mentioned Pressure Equipment Directive. The products’ use
on other fluids may be possible but, if this is contemplated, Spirax Sarco should be contacted
to confirm 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 fitted, 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 fluid flow.
iv) Spirax Sarco products are not intended to withstand external stresses that may be induced
by any system to which they are fitted. 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 film 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: flammable materials, substances hazardous to health, extremes of temperature.
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, fire hazard (e.g. during welding), excessive noise, moving machinery.
1. Safety information
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1.6 The system
Consider the ef fect 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 the 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.
1.13 Residual hazards
In normal use the external sur face 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 500 °C (932 °F).
Many products are not self-draining. Take due care when dismantling or removing the product from
an installation (refer to ‘Installation and 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.
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1.15 Safety information - product specific
See Section 6 'Maintenance' of this document for specific details relating to these products.
1.16 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.
1.17 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 identified as hazardous or potentially hazardous.
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2.1 General description
The TD62LM and TD62M are maintainable high pressure thermodynamic steam traps with integral strainer
and a replaceable seat to ease maintenance. They have been designed specifically for steam mains drainage
applications. The body castings are produced by a TÜV approved supplier in accordance with AD-Merkblatt
WO/TRD100 and are available with screwed, socket weld or flanged connections.
The TD62LM is specifically designed for relatively small condensate loads on superheat and mains drainage
applications.
An insulating cover is fitted as standard on both the TD62M and TD62LM.
Available types
TD62LM with low capacity orifice.
TD62M with standard orifice.
Standards
This product fully complies with the requirement of the Pressure Equipment Directive (PED).
Certification
This product is available with certification to EN 10204 3.1.
Note: All certification/inspection requirements must be stated at the time of order placement.
Note: For additional information see the following Technical Information Sheets:
TI-P068-08 (screwed and socket weld),
TI-P068-19 (EN body with flanged connections),
TI-P068-20 (ASTM body with flanged connections).
2.2 Sizes and pipe connections
ASTM body - ASTM A217 WC6
½", ¾" and 1" with screwed NPT or socket weld (ASME/ANSI B 16.11 Class 3000) connections DN15, DN20
and DN25 - standard flanges ASME/ANSI B 16.5 Class 300 and 600, JIS/KS 40.
EN body - EN 10213-2 G17 CrMo5-5+QT
DN15, DN20 and DN25 - standard flange EN 1092 PN100.
Fig. 2 Flanged
Fig. 1 Screwed/socket weld
2. General product information
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2.3 Pressure/temperature limits
The product must not be used in this region.
The product should not be used in this region or beyond its operating range as damage to
the internals may occur.
A - B Flanged to ASME/ANSI B 16.5 Class 600
A - C Flanged to JIS/KS 40
A - D Flanged to ASME/ANSI B 16.5 Class 300
Pressure bar g
Temperature °C
B
D
ASTM
(flanged)
A
Temperature °C
EN
(flanged)
Pressure bar g
Temperature °C
Pressure bar g
Steam saturation curve
Screwed
and socket
weld
Steam saturation curve
Pressure psi g
Temperature °F
Pressure psi g
Temperature °F
Pressure psi g
Temperature °F
C
Steam saturation
curve
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Body design conditions
Screwed ASME/ANSI 600
Socket weld ASME/ANSI 600
EN body PN100
ASTM body ASME/ANSI 600
PMA
Maximum
allowable
pressure
Screwed 103 bar g @ 93 °C (1 494 psi g @ 199 °F)
Socket weld 103 bar g @ 93 °C (1 494 psi g @ 199 °F)
EN body 98.1 bar g @ 300 °C (1 422 psi g @ 572 °F)
ASTM body 103 bar g @ 93 °C (1 494 psi g @ 199 °F)
TMA Maximum allowable temperature 525 °C @ 42.7 bar g (977 °F @ 619 psi g)
Minimum allowable
temperature
Screwed 0 °C (32 °F)
Socket weld 0 °C (32 °F)
EN -10 °C (14 °F)
ASTM 0 °C (32 °F)
PMO
Maximum operating pressure for steam
service
62 bar g @ 482 °C (899 psi g @ 899 °F)
TMO Maximum operating temperature 525 °C @ 42.7 bar g (977 °F @ 619 psi g)
Minimum operating
temperature
TD62LM 0 °C (32 °F)
TD62M 0 °C (32 °F)
PMOB
Maximum
operating
backpressure
TD62LM 50% of upstream pressure
TD62M 80% of upstream pressure
Minimum operating
pressure
Note: These figures
relate to normal
operating conditions
and not start-up.
TD62LM
Low
capacity
version
8 bar g @ 175 °C (116 psi g @ 347 °F)
TD62M
Standard
version
1.4 bar g @ 126 °C (20 psi g @ 259 °F)
Designed for a maximum cold
hydraulic test pressure of:
ASTM 155 bar g (2 248 psi g)
EN 150 bar g (2 175 psi g)
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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 operating
limit of the product is lower than that of the system in which it is being fitted, ensure that a safety
device is included in the system to prevent overpressurisation.
3.2
Determine the correct installation situation and the direction of fluid flow.
3.3
Remove protective covers from all connections and protective film from all name-plates, where
appropriate, before installation on steam or other high temperature applications.
3.4
The preferred installation is in a horizontal pipe with the insulating cover uppermost (see Figure 3).
The trap will operate in any position, but the service life may be affected.
Note: When a socket weld trap is being installed the welding should be carried out to an approved
procedure of a recognised standard.
3.5
Observe the flow direction markings on the trap body. Stop valves should be installed so as to
permit the isolation of the trap from both supply and return line pressure. If the trap discharges to
atmosphere, the discharge should be directed to a safe place.
Note: the disc and seating surfaces of these traps have been produced to a high degree of flatness
to achieve good shut-off under high pressure conditions. An integral strainer helps prevent dirt and
scale from entering the trap. If particles become entrapped between the disc and seat, the high
flow velocities can cause rapid wear and erosion. A separate strainer and/or dirt pocket will provide
additional protection.
3.6
Access for removal of the integral strainer screen should be provided.
3.7
The insulating cover may be removed to facilitate installation, but it must be replaced before the
trap is put into service.
Note: If the trap is to discharge to atmosphere ensure it is to a safe place, the discharging fluid may be at
a temperature of 100 °C (212 °F).
3. Installation
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Fig. 3 Typical installation
Steam main
Stop valve
Stop valve
TD62LM
or
TD62M
Dirt leg
Drain valve
Strainer
To drain or return
To drain
Alternative layout
Suggested drop leg if the TD62LM or TD62M is located
more than 2 m (6 ft) away from the main drop leg.
Stop valve
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4.1 General information
After installation or maintenance ensure that the system is fully functioning. Carry out tests on any alarms
or protective devices.
4.2 Commissioning with particular reference to venting air
(refer to Figure 4).
With high pressure systems, initial start-up can take several hours (or days) to bring the system to normal
operating pressure and temperature. Even if the trap has replaced another trap while the main system has
remained running, it may still be necessary to vent air from the drop leg. If the trap is some distance from
stop valve 'A', it could be possible to air lock the pipework between valve 'A' and the TD62M or TD62LM
(i.e. the trap closes to air and does not readily allow steam to enter the pipework). To overcome this on
start-up the following procedure should be adopted. With stop valve 'B' closed, drain valve 'C ' open, slowly
and partially open stop valve 'A'. This will discharge the air, condensate and any pipe debris. Valve 'C'
should be fully closed, and valves 'A' and 'B' slowly opened to the fully open position.
When the trap is more than 2 m (6 ft) away from the vertical drain leg, a suitable drop leg at the inlet to the
trap can improve its service life by ensuring that the trap does not see a mixture of steam and condensate.
Important note:
After the trap has been in service at normal operating pressure and temperature for 24 hours, it is
essential that the cover nuts are retightened (see Table 1 page 14 for the recommended tightening
torques). This will ensure the correct compression of the gasket under service conditions.
The TD62LM and TD62M are thermodynamic steam traps 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 (flashing) of hot condensate. Cool
condensate, air and other non-condensible gases enter the trap through the central orifice, lift the disc,
and are discharged through the outlet orifice. When the condensate approaches steam temperature, a
portion of it flashes as it enters the trap. The flash 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 surfaces, stopping the flow. 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 influenced by excessive heat
loss when subjected to low ambient temperatures, wind, rain, etc.
4. Commissioning
5. Operation
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Fig. 4 Typical installation
Steam main
Stop valve
Stop valve
TD62LM
or
TD62M
Dirt leg
Drain valve
Strainer
To drain or return
To drain
Alternative layout
Suggested drop leg if the TD62LM or TD62M is located
more than 2 m (6 ft) away from the main drop leg.
Stop valve
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Note: Before actioning any maintenance programme observe the 'Safety information ' in Section 1.
Warning
The cover gasket contains a thin stainless steel support ring which may cause physical injury if
not handled and disposed of carefully.
6.1 How to fit the disc and seat:
-
Spring off the insulating cover (5), unscrew the four nuts (9) and remove the top cover (2).
-
Lift off the disc (6).
-
Remove the cover gasket (10) and lift out the seat unit (7). The use of 2 screwdrivers inserted into the
groove may ease removal. Ensure that the location ferrule (15) is also removed.
-
Carefully remove the seat gaskets (13 + 14) from the body of the trap. Ensure that no damage is caused
to the trap body.
-
Ensure that the gasket contact surface in the body is clean and fit new seat gaskets (13 + 14).
-
Fit the new seat unit (7) ensuring that the location ferrule (15) is firmly located in the body.
-
Fit the new cover gasket (10) and fit a new disc (6). Ensure that the disc is fitted with the grooves facing
the seat.
-
Replace the top cover (2) ensuring the cover gasket remains in place.
-
Replace the 4 nuts (9).
Tighten the nuts diagonally in sequence to a recommended torque of 45 - 50 N m (33 - 37 lbf ft).
Note: The use of a thread lubricant is recommended. Replace the insulating cover (5).
-
After 24 hours check the torque on the top cover nuts (9).
-
Always open the isolation valves slowly and check for leaks.
6. Maintenance
Table 1 Recommended tightening torques
Item Part
or
mm
N m (lbf ft)
3 Strainer cap 32 A/F 142 - 158 (105 - 107)
8 and 8A Cover studs M10 x 30 20 - 25 (15 - 18)
9 Cover nuts 17 A / F 45 - 50 (33 - 37)
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Fig. 5 Screwed and socket weld
Fig. 6 Flanged
9
6
12
4
8
10
5
3
5
9
14
8
8A
10
6
4
9
10
7 +15
13
2
11
7 + 15
13
14
3
2
11
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6.2 How to clean or replace the strainer screen:
Note: On older models the strainer was a 0.8 mm perforated screen. Newer models use a 100 mesh screen
to provide improved screening. The screens are interchangeable.
Screwed and socket weld connections (Figure 7)
-
Access to the strainer screen can be obtained by removing strainer cap (3).
-
Remove the strainer screen (4).
-
Fit a new or cleaned strainer screen into the recess in the cap (3).
-
A new gasket (12) should be fitted and the cap (3) screwed into the body and tightened to the
recommended torque (see Table 1).
Note: The use of a thread lubricant is recommended.
Flanged connections (Figure 8)
-
Unscrew the four bottom cover nuts (9) and remove the bottom cover (3).
-
Remove the strainer screen (4) and inspect. Locate the new screen or replace a cleaned screen onto
the spigot on the bottom cover (3).
-
Reassemble the cover (3) to the body using a new gasket (10) ensuring that the gasket faces are
perfectly clean.
-
The cover nuts (9) should be tightened to the recommended torque in a diagonally opposite sequence
(see Table 1). After 24 hours in service the cover nuts should be checked for tightness.
Note: The use of a thread lubricant is recommended.
6.3 How to replace the cover studs:
Screwed and socket weld connections (Figure 7)
After removing old cover studs (8), fit new cover studs until the studs bottom out.
Note: The use of a thread lubricant is recommended.
Flanged connections (Figure 8)
The flanged TD62M and TD62LM are fitted with two different lengths of studs. It is therefore important
that the correct length of stud is fitted into the correct tapped holes in the body. The studs are packed in
separate labelled bags (A, B, C, D), within the spares pack. The stud holes are as marked on the diagrams
in Figure 11. Fit new studs to the recommended torque (see Table 1) until they bottom out.
Note: The use of a thread lubricant is recommended.
Table 1 Recommended tightening torques
Item Part
or
mm
N m (lbf ft)
3 Strainer cap 32 A/F 142 - 158 (105 - 107)
8 and 8A Cover studs M10 x 30 20 - 25 (15 - 18)
9 Cover nuts 17 A / F 45 - 50 (33 - 37)
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Fig. 7 Screwed and socket weld
Fig. 8 Flanged
9
6
12
4
8
10
5
3
5
9
14
8
8A
10
6
4
9
10
7 +15
13
2
11
7 + 15
13
14
3
2
11
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The spare parts available are shown in heavy outline. Parts drawn in a grey line are not supplied as spares
(Figures 9 and 10).
Available spares
Screwed/socket weld
Description Spirax Sarco stock No. Item No.
Insulating cover 0685685 5
Set of cover studs and nuts (set of 4) 0685681 8, 9
Seat and disc assembly
TD62LM 0686581 6, 7, 10, 13, 14, 15
TD62M 0686580 6, 7, 10, 13, 14, 15
Strainer screen 0685682 4
Set of gaskets (packet of 3 sets) 0686582 10, 12, 13, 14
Strainer cap gasket (3 off) 0686584 12
Flanged - ASTM body
Description Spirax Sarco stock No. Item No.
Insulating cover 0685685 5
Set of cover studs and nuts (set of 8) * 0685687 8, 8A, 9
Seat and disc assembly
TD62LM 0686581 6, 7, 10, 13, 14, 15
TD62M 0686580 6, 7, 10, 13, 14, 15
Strainer screen 0685682 4
Set of gaskets (packet of 3 sets) 0686583 10, 13, 14
Cover gasket (3 off) 0686585 10
* Note: There are 2 sets of 4 studs which make-up the cover stud and nut set. They are marked 'T ' for top
studs and 'B' for bottom studs (see Figure 11). Care should be taken to ensure that the correct studs are
fitted into the correct tappings, see Section 6.3 - Flanged connections + Figure 11.
7. Spare parts
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Fig. 9 Screwed and socket weld
5
9
14
8
8A
10
6
4
9
10
7 +15
13
Fig. 10 Flanged
9
6
12
4
8
10
5
3
7 + 15
14
13
B
B
B
B
T
T
T
T
T = Top
B = Bottom
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How to order spares
Always order spares by using the description given in the column headed 'Available spares',
and state the size and type of trap.
Example: 1 - Insulating cover for a DN15, TD62LM thermodynamic steam trap, having a flanged - ASTM
body. Stock No. 0685685.
Flanged - EN body
Description Spirax Sarco stock No. Item No.
Insulating cover 0685685 5
Set of cover studs and nuts (set of 8) 0685688 8, 8A, 9
Seat and disc assembly
TD62LM 0686581 6, 7, 10, 13, 14, 15
TD62M 0686580 6, 7, 10, 13, 14, 15
Strainer screen 0685682 4
Set of gaskets (packet of 3 sets) 0686583 10, 13, 14
Cover gasket (3 off) 0686585 10
* Note: There are 2 sets of 4 studs which make-up the cover stud and nut set. They are marked 'T ' for top
studs and 'B' for bottom studs (see Figure 11). Care should be taken to ensure that the correct studs are
fitted into the correct tappings, see Section 6.3 - Flanged connections + Figure 11.
Fi g . 11
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Fig. 12 Screwed and socket weld Fig. 13 Flanged
5
9
14
8
8A
10
6
4
9
10
7 +15
13
9
6
12
4
8
10
5
3
7 + 15
14
13
B
B
B
B
T
T
T
T
T = Top
B = Bottom
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