Spirax Sarco PM6 Manuale utente

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

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.

IM-P373-18 CTLS Issue 5 3

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.

IM-P373-18 CTLS Issue 54

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.

IM-P373-18 CTLS Issue 5 5

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.

IM-P373-18 CTLS Issue 56

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.

IM-P373-18 CTLS Issue 5 7

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

IM-P373-18 CTLS Issue 58

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

DN32

1¼"

DN40

1½"

DN50

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

IM-P373-18 CTLS Issue 5 9

612 910 8

Fig. 1 PM6

IM-P373-18 CTLS Issue 510

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

Indice

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