Spirax Sarco MSC-125 Manuale utente

IM-P117- 39 CMGT Issue 1

MSC04 shown

1. Safety information

2. General product

information

3. Installation

4. Commissioning

5. Operation

6. Maintenance

7. Spare parts

Printed in GB

IM- P117-39

CMGT Issue 1

1170152/1

MSC-125 and MSC-160 Manifolds for Steam

Distribution and Condensate Collection

Installation and Maintenance Instructions

IM-P117- 39 CMGT Issue 1

1. Safety information

Safe operation of this product can only be guaranteed if it is 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, product markings and

Technical Information Sheet, check that the product is suitable for the intended

use / application.

This product complies with the requirements of the European Pressure Equipment

Directive and falls within Category '1' and therefore carries the mark.

i) This product has 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, 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.

IM-P117- 39 CMGT Issue 1

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 opened and closed

progressively 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.

IM-P117- 39 CMGT Issue 1

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 surface of the product may be very hot. If used at the

maximum permitted operating conditions the surface temperature may reach

temperatures in excess of 425 °C (797 °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 identified as hazardous or potentially hazardous.

IM-P117- 39 CMGT Issue 1

2. General product information

2.1 General description

A range of forged carbon steel compact manifolds with integral piston type stop valves

for steam distribution and condensate collection duty. MSC manifolds can be used for

either steam distribution duty or condensate collection duty depending on the way they

are installed.

Optional extras

The following are available at extra cost:

-Mounting kit comprising of studs,

spacers and nuts.

-Insulating jacket.

-Fitted with steam traps for quick

installation projects.

Fig. 1 Type MSC04 socket weld version shown

Flow direction when

used for condensate

collection duty

Flow direction when

used for steam

distribution duty

Recommended alternatives

Standards

This product fully complies with the

requirements of the European Pressure

Equipment Directive 2014/68/EU.

Certification

The product is available with certification to EN 10204 3.1.

Note: All certification / inspection requirements must be stated at the time of order placement.

IM-P117- 39 CMGT Issue 1

2.2 Available types, sizes and pipe connections

MSC manifolds are available with 4, 8 or 12 connections, with and without integral piston

isolation valves designated:

MSC04-125, MSC08-125 and MSC12-125 with 125mm pitch respectively

DN15 and DN20 screwed BSP, NPT or socket weld to B16.11 Class 3000 tracer ports are

available as standard.

MSC04-160, MSC08-160 and MSC12-160 with 160mm pitch respectively

DN15 and DN20 screwed BSP, NPT or socket weld to B16.11 Class 3000 tracer ports are

available as standard.

The steam main / condensate return connection is DN40 socket weld to ASME B 16.11 as

standard.

Alternative connections, including flanged, are available on request.

IM-P117- 39 CMGT Issue 1

0 10 20

19.6

30 40 50

-46

100

200

300

400

200

400

600

100 200 300 400 500 600 700

2.3 Pressure / temperature limits

The product must not be used in this region.

A - BFlanged ASME Class 300, screwed and socket weld.

A - CFlanged ASME Class 150.

Body design conditions ASME B16.5 Class 300

PMA Maximum allowable pressure 51 bar g @ 38 °C 740 psi g @ 100 °F

TMA Maximum allowable temperature 425 °C @ 28 bar g 797 °F @ 406 psi g

Minimum allowable temperature -46 °C -50 °F

PMO

Maximum

operating

pressure for

saturated steam

service

ASME 150 14 bar g 203 psi g

ASME 300, SW, NPT 602 psi g

TMO

Maximum

operating

temperature

ASME 150 425 °C @ 5.5 bar g 797 °F @ 80 psi g

ASME 300,

SW, NPT 425 °C @ 28 bar g 797 °F @ 406 psi g

Minimum operating temperature 0°C 32 °F

Note: For lower operating temperatures consult Spirax Sarco

Designed for a maximum cold hydraulic test pressure of: 76 bar g 1 102 psi g

2.4 Kvvalues

All sizes Kv 1.8

For conversion:

Cv(UK) = Kvx 0.963

Cv(US) = Kvx 1.156

The Kvstated is for each valve rather than the complete manifold.

Pressure bar g

Temperature °C

C B

Steam

saturation

curve

Pressure psi g

Temperature °F

IM-P117- 39 CMGT Issue 1

3. Installation

Note: Before actioning any installation observe the 'Safety information' in Section 1.

Referring to the Installation and Maintenance Instruction, 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.

Note: If the trap draining the manifold 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).

3.4 General information

The manifold has been designed for vertical installation. Ensure that there is sufficient

access to the handwheel to allow proper operation. The back is provided with threaded

connections M12 for attaching to a supporting structure.

For ease of insulation it is recommended that spacers are fitted to give the manifold a

stand-off of at least 50 mm.

For convenience the following sets of mounting kit are available:

-A single set comprising 2 off each stud, nut and spacer suitable for installing one MSC04

or MSC08.

-A single set comprising 4 off each stud, nut and spacer suitable for installing one MSC12.

-A multiple set comprising 12 off each stud, nut and spacer suitable for installing 6 x MSC04,

6 x MSC08 or 3 x MSC12.

After installation it is recommended that the manifold is insulated to minimise radiated heat

losses and to protect personnel from burn risks. This is most easily done using the optional

insulating jacket.

3.5 Steam distribution duty

The recommended installation is with the steam inlet connection at the top of the manifold.

A trap set should be fitted to the bottom. The discharge from this trap set should ideally

be returned. If it is to be discharged to atmosphere we recommend that a diffuser is fitted.

3.6 Condensate collection duty

The recommended installation is with the condensate outlet at the top. The bottom of the

manifold should be fitted with a stop valve for blowdown purposes. Again, we recommend

that a diffuser is fitted.

3.7 Pipeline welding

Any welding provided by Spirax Sarco or our nominated sub-vendors will be in accordance

with our latest Weld Procedures and associated documentation. Copies are available, if

required, on request and should be approved before any orders are placed.

Any welding that is not being carried out by Spirax Sarco or their sub-vendors, will remain

the full responsibility of the customer, user or their own appointed contractors / sub-vendors.

IM-P117- 39 CMGT Issue 1

5. Operation

The integral piston valves should be either fully open or fully closed. They are not intended

for throttling duties.

During closing operation the piston ensures a permanent seal by means of the handwheel.

Therefore during service never remove the handwheel from the spindle. Due to the large

sealing area of the piston valve, it is not necessary to use a valve key to ensure leaktight

shut-off.

During opening operation the piston is stopped when the valve is fully open as its top

touches the inside of the bonnet.

Operation of the handwheel should always be light.

After installation or maintenance ensure that the system is fully functioning. Carry out tests

on any alarms or protective devices.

4. Commissioning

Fig. 2 Installation view from above

MSC manifold

M12 stud

M12 Nut

Structural steelwork

Spacer

50 mm

IM-P117- 39 CMGT Issue 1

6. Maintenance

Note: Before actioning any maintenance programme observe the 'Safety information'

in Section 1.

Warning

The graphite stem sealing rings (items 8 and 9) contain thin stainless steel support

rings which may cause physical injury if not handled and disposed of carefully.

6.1 Maintenance in service

After the manifold is first put into service or after a change of sealing rings (8and 9), the

bonnet nuts (4) should be lightly followed up with the valve in the closed position. Ensure

the bonnet (2) is driven down straight during tightening and that care is taken with the

handwheel operation. This operation is to be repeated should any trace of leakage develop.

If perfect sealing cannot be achieved in this way, repack the valve following the procedure

below. The handwheel can be unscrewed from the piston valve assembly following the

removal of the top nut and domed lock-nut, (11). A washer is located under these nuts and

also one between the the handwheel and valve bonnet. During reassembly ensure that

these are refitted in the correct locations, by using a suitable anti-seize compound applied

to the washers and applying the recommended torque to the nuts - See Table 1.

The top nut and domed lock-nut (item 11) should be locked together by unscrewing the top

nut by an th of a turn whilst maintaining the position of the domed lock-nut.

6.2 Preparation of valve dismantling

Before starting work ensure that you have suitable tools and / or consumables available.

Before attempting to carry out any maintenance, ensure that the manifold is fully isolated

and safely depressurised. Do not assume the system is depressurised even when the

pressure gauge indicates zero. If performing maintenance whilst the pipework is hot, wear

appropriate protective clothing. Carefully remove insulation if fitted. When using the optional

insulation jacket, this is easily removed by undoing the fastenings.

6.3 Dismantling the valve:

-Using the handwheel (10), fully open the valve.

-Remove the bonnet nuts (4) and washers (5) from studs (3).

-Carefully turn the handwheel in the closing direction to lift the bonnet (2).

-Rotate the bonnet (2) to ensure that the flange bolt holes are misaligned with the studs (3).

-Turn the handwheel in the opening direction to release the piston (6) from the upper and

lower sealing rings (8and 9) and so release piston / bonnet sub-assembly from the body (1).

-Examine the piston (6) for signs of scoring, corrosion etc. which could affect perfect

tightness of the valve.

-Check other parts for wear / damage and replace if necessary.

Table 1 Recommended tightening torques

Item

N m lbf ft

414 " x 18 UNC 12 8.9

11 10 M6 12 8.9

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