Spirax Sarco PM6 User manual

IM-P373-18 CTLS Issue 5 1
1. Safety information
2. General product and
delivery information
3. Installation
4. Commissioning
5. Maintenance
6. Spare parts
7. Fault finding
© Copyright 2017
Printed in GB
IM-P373-18
CTLS Issue 5
3739350/5
PM6 Stainless Steel
Piston Actuated Modulating Control Valves
Installation and Maintenance Instructions

IM-P373-18 CTLS Issue 52
1. Safety information
marking
The positioner has been tested and approved by a Notified Body with regards to
its compliance with the EN 61326-1:2013 'Electrical equipment for measurement,
control and laboratory use. EMC requirements'.
Attention
This product complies with Electromagnetic Compatibility Directive 2004 / 108 / EC
and all its requirements.
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.
The product listed below complies with the requirements of the European Pressure
Equipment Directive 2014/68/EU and carries the mark when so required.
The product falls within the following Pressure Equipment Directive categories:
Product Group 1
Gases
Group 2
Gases
Group 1
Liquids
Group 2
Liquids
PM6
DN15 - DN25 (PN40) SEP SEP SEP SEP
DN32 - DN40 (PN25) 1SEP SEP SEP
DN50 (PN16) 1SEP SEP SEP
i) The products have been specifically designed for use on steam, water, compressed
air, inert industrial gases and certain oils from Group 2 of the above mentioned
Pressure Equipment Directive. The PM6 can also be used on propane or methane
gases which are in Group 1 of the above 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 over temperature 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.

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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.
1.6 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.

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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 PTFE - Handling precautions
Within its working temperature range PTFE is a completely inert material, but when
heated to its sintering temperature it gives rise to a gaseous decomposition product
or fumes which can produce unpleasant effects if inhaled. The inhalation of these
fumes is easily prevented by applying local exhaust ventilation to atmosphere as
near to their source as possible.
Smoking should be prohibited in workshops where PTFE is handled because tobacco
contaminated with PTFE will during burning give rise to polymer fumes.
It is therefore important to avoid contamination of clothing, especially the pockets,
with PTFE and to maintain a reasonable standard of personal cleanliness by washing
hands and removing any PTFE particles lodged under the fingernails.
1.14 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 180 °C (356 °F).
Many products are not self-draining. Take due care when dismantling or removing
the product from an installation (refer to 'Maintenance instructions').
1.15 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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1.16 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. However, if the valve is fitted with a FKM or PTFE seat,
special care must be taken to avoid potential health hazards associated with
decomposition/burning of these seats.
FKM:
-Can be landfilled, when in compliance with National and Local regulations.
-Can be incinerated, but a scrubber must be used to remove Hydrogen Fluoride,
which is evolved from the product and with compliance to National and Local
regulations.
-Is insoluable in aquatic media.
PTFE:
-Can only be disposed of by approved methods, not incineration.
-Keep PTFE waste in a separate container, do not mix it with other rubbish, and
consign it to a landfill site.
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. General product and delivery
information
2.1 Description
This document is a general installation and maintenance manual intended for the PM6
2-port pneumatically actuated modulating stainless steel control valve. The PM6 has been
designed for use on steam, water, air, oil, gases and vacuum applications. As standard it
is fitted with a PEEK plug seal for operation up to 180 °C (356 °F), and both the body and
shaped-plug have undergone a hardening treatment.
Valves are available with one of two sizes of actuator:
Type 2 (63 mm) and Type 3 (90 mm) with the following action:
-NC (Normally Closed) - Designed for flow under the seat (port 2 to 1).
Valves are available with the following fail safe options:
C - Closed The valve fails in the closed position
M - Maintained The valve fails in the last known operating position
2.2 Equipment delivery, handling and storage
Factory shipment
The product is tested, calibrated and inspected prior to shipment, to ensure reliable
operation.
Receipt of shipment
Each carton should be inspected at the time of delivery for possible external damage. Any
visible damage should be recorded immediately on the carrier’s copy of the delivery slip.
Each carton should be unpacked carefully and its contents checked for damage. If it is
found that some items have been damaged or are missing, notify Spirax Sarco immediately
and provide full details. In addition, damage must be reported to the carrier with a request
for their on-site inspection of the damaged item and its shipping carton.
Storage
If the product is to be stored for a period prior to installation, the environmental storage
conditions should be at a temperature between 0 °C and 65 °C (32 °F and 149 °F), and
between 10% and 90% relative humidity (non-condensing).
Ensure there is no condensation within the unit before installing and connecting the power.

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2.3 Technical details
Leakage PEEK soft seal ASME class VI
Flow characteristic Equal percentage
Flow direction Flow under seat Port 2 to 1
Pilot media Instrument quality air 60 °C maximum
Actuator rotation 360°
Actuator
type and
size
Pilot connection Maximum pilot pressure
Type 2 = 63 mm diameter Push-in type to suit
Ø6 mm pipe 8 bar g
Type 3 = 90 mm diameter Push-in type to suit
Ø6 mm pipe 8 bar g

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2.4 Materials
No. Part Material
1Body Stainless steel AISI 316L
2Bonnet Stainless steel AISI 316L
3Plug Stainless steel AISI 316L
4Valve plug seal PEEK
5Valve stem Stainless steel AISI 316L
6Stem seals PTFE + Carbographite
7Stem 'O' ring (Not shown) FKM
8Actuator housing 30% glass filled polyamide
9Piston Aluminium
10 Piston 'O' ring NBR
11 Gasket PTFE
12 'O' ring FKM
2.5 Kvs values
Size DN15
½"
DN20
¾"
DN25
1"
DN32
1¼"
DN40
1½"
DN50
2"
Kvs 4.5 8.7 12.7 19.8 29.7 36.3
For conversion:
Cv(UK) = Kvx 0.963
Cv(US) = Kvx 1.156

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4
5
11
2
1
612 910 8
Fig. 1 PM6
3

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Temperature °C
Pressure bar g
Steam
saturation
curve
2.6 Pressure / temperature limits
Pressure psi g
Temperature °F
The product must not be used in this region or beyond the body design conditions
quoted in the table below as damage to the internals will occur.
A - APN10 A - CPN50
A - BPN16 and ASME 150 A - D PN40
Body design
conditions
Screwed, butt weld,
socket weld
and flanged EN 1092
DN15 - DN25 (½" - 1") PN40
DN32 and DN40 (1¼" - 1½") PN25
DN50 (2") PN16
Flanged ASME DN15 - DN50 (½" - 2") Class 150
Sanitary clamp
compatible connections DN15 - DN50 PN10
Maximum design pressure Refer to the graph above
Maximum design temperature 180 °C (356 °F)
Minimum design temperature -10 °C (14 °F)
Maximum operating pressure for
saturated steam service 9 bar g @ 180 °C (130.5 psi g @ 356 °F)
Maximum operating temperature 180 °C (356 °F)
Minimum operating temperature -10 °C (14 °F)
Ambient temperature limits -10 °C to +60 °C (14 °F to 140 °F)
Maximum differential pressure (see Section 2.7)
Designed for a maximum cold hydraulic test
pressure of:
1.5 x Maximum design pressure
(PN rating)
Maximum test pressure is equal to the maximum differential pressure