Spirax Sarco LCV6 Manuale utente

IM-P029-17 ST Issue 4

LCV3, LCV4, LCV6 and LCV7

Lift Check Valves

Installation and Maintenance Instructions

IM-P029-17

ST Issue 4

0290050/4

1. Safety information

2. General

product information

3. Installation

4. Commissioning

5. Operation

6. Spare parts and

Maintenance

Printed in France

IM-P029-17 ST Issue 4

1. Safety information

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. The products listed below comply with the requirements of the

European Pressure Equipment Directive 97 / 23 / EC and carry the mark when so

required. It should be noted that products rated as 'SEP' are required by the Directive

not to carry the mark. The products fall within the following Pressure Equipment

Directive categories:

Unit Sizes Connections Group 1

Gases

Group 2

Gases

Group 1

Liquids

Group 2

Liquids

LCV3

DN15 to DN25 All SEP SEP SEP SEP

DN32 to DN50 All 1SEP SEP SEP

DN65 to DN100 All 2 1 SEP SEP

LCV4

DN15 to DN25 All SEP SEP SEP SEP

DN32 All 2SEP SEP SEP

DN40 to DN50

ASME 150

1SEP SEP SEP

JIS / KS 10

PN25 and PN40

2 1 SEP SEP

JIS / KS 20

Others 2 1 2 SEP

DN65 to DN100 All 2 1 2 SEP

IM-P029-17 ST Issue 4

Unit Sizes Connections Group 1

Gases

Group 2

Gases

Group 1

Liquids

Group 2

Liquids

LCV6

DN15 to DN25 All SEP SEP SEP SEP

DN32 All 2SEP SEP SEP

DN40 to DN50

ASME 150

1SEP SEP SEP

JIS / KS 10

BSP

2 1 SEP SEPPN16, PN25 and PN40

JIS / KS 20

Others 2 1 2 SEP

DN65 to DN100 All SEP 1 2 SEP

LCV7

DN15 to DN25 All SEP SEP SEP SEP

DN32 to DN40

ASME 250

2 1 SEP SEP

NPT

Others 1SEP SEP SEP

DN50 to DN65

ASME 125

1SEP SEP SEP

JIS / KS 10

Others 2 1 SEP SEP

DN80

ASME 250 2 1 2 SEP

Others 2 1 SEP SEP

DN100

ASME 125

2 1 SEP SEPPN16

JIS / KS 10

Others 2 1 2 SEP

IM-P029-17 ST Issue 4

i) Theseproductshavebeenspecicallydesignedforuseonsteam,airorwater/

condensate as stated in Groups 1 and 2 of the above mentioned Pressure

EquipmentDirective.Theproducts’useonotheruidsmaybepossiblebut,if

thisiscontemplated,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 )  R e m o v e  p r o t e c t i o n  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 

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.

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 Isolation

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.

IM-P029-17 ST Issue 4

1.7 Pressure

Before attempting any maintenance consider what is or may have been in the

pipeline. Ensure that any pressure is isolated and safely vented to atmospheric

pressure before attempting to maintain the product, this is easily achieved by

fitting Spirax Sarco depressurisation valves type DV (see separate literature for

details) and consider double isolation (double block and bleed) and the locking or

labelling of closed valves. Do not assume that the system is depressurised even

when a pressure gauge indicates zero.

1.8 Temperature

Allow time for temperature to normalise after isolation to avoid the danger of burns

and consider whether protective clothing (including safety glasses) is required.

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 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').

IM-P029-17 ST Issue 4

Safe Handling

Cast Iron is a brittle material. If the product is dropped

during installation and there is any risk of damage the

product should not be used unless it is fully inspected and

pressure tested by the manufacturer.

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, these

products are recyclable and no ecological hazard is anticipated with their 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.

1.17 Working safely with cast iron products on steam

Cast iron products are commonly found on steam and condensate systems. If

installed correctly using good steam engineering practices, it is perfectly safe.

However, because of its mechanical properties, it is less forgiving compared to other

materials such as SG iron or carbon steel. The following are the good engineering

practices required to prevent waterhammer and ensure safe working conditions on

a steam system.



IM-P029-17 ST Issue 4

Steam

Trap set

Trap set Trap set

Steam

Gradient 1:100

30 - 50 metre intervals

Condensate Condensate

Condensate

Prevention of water hammer

Steam trapping

on steam mains:

Steam Mains - Do's and Don'ts:

Steam 





Steam

Flow Flow

IM-P029-17 ST Issue 4

Prevention of tensile stressing

Pipe misalignment:

Installing products or re-assembling after maintenance:

Thermal expansion:

Do not over tighten.

Use correct torque gures.

4 2

Flange bolts should be gradually tightened across

diameters to ensure even load and alignment.

Guides

Limit

rods

Limit rods

Fixing point

Medium

distance

Small

lateral

movement

Small

lateral

movement

Large

lateral

movement

Large

lateral

movement

Short

distance Fixing point

Axial

movement

Axial movement

Guides



IM-P029-17 ST Issue 4

2. General product information

2.1 General description

The LCV3, LCV4, LCV6 and LCV7 lift check valves are designed in accordance with

EN 12516 and ASME B16.34 to prevent reverse flow in the installations.

Available types:

LCV3 Cast iron bodied with stainless steel internals.

LCV4 Cast steel bodied with stainless steel internals.

LCV6 Stainless steel bodied with stainless steel internals.

LCV7 SG iron bodied with stainless steel internals.

Optional for the LCV4:

High temperature bolting (stainless steel A2-70).

Standards

These products fully comply with the requirements of the European Pressure Equipment

Directive 97/23/EC and carries the mark when so required.

Standard shut-off

This range of lift check valves conform to EN 12266-1: 2003 Rate F.

Certification

With the exception of the LCV3 these products are available with certification to

EN 10204 3.1. Note: All certification / inspection requirements must be stated at the time of

order placement.

Note:

For further information see the following Technical Information Sheet TI-P029-16.

2.2 Sizes and pipe connections

Unit LCV3 LCV4

Connections

PN16

JIS / KS10

ASME 125 BSP

NPT

PN40

JIS / KS 20

ASME 150

ASME 300

NPT SW

DN15 ½" • • • • •

DN20 ¾" • • • • •

DN25 1" • • • • • •

DN32 1¼" • • • •

DN40 1½" • • • • • •

DN50 2" • • • • • •

DN65 2½" • • • •

DN80 3" • • • •

DN100 4" • • • •

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