Spirax Sarco PV4 Manuale utente

IM-IBR-P174-01-EN-ISS1 CMGT 1

IM-IBR-P174-01-EN-ISS1

CMGT (India)

1. Safety information

2. General product

information

3. Installation

4. Commissioning

5. Operation

6. Maintenance

7. Spare parts

Printed in India

PV4 and PV6

Piston Valves

Installation and Maintenance Instructions

IM-IBR-P174-01-EN-ISS1 CMGT2

IM-IBR-P174-01-EN-ISS1 CMGT 3

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 Indian Boiler

Regulations, 1950

i) The PV4 has been specifically designed for use on steam, air or condensate.

The PV4 and PV6 range have been designed for use on steam, air and water

condensate. 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) A number of products are supplied for the intention of the end user (or agent

thereof) modifying the flange configuration from that supplied. It is the

responsibility of the organisation carrying out the modification to do so in

accordance with the internationally recognised flange standards and to ensure

that the design rating and operation of the product are not compromised. Spirax

Sarco will not be held responsible for any unapproved modification or

consequential liability resulting in failure to observe these requirements.

iv) Determine the correct installation situation and direction of fluid flow.

v) 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.

vi) 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.

IM-IBR-P174-01-EN-ISS1 CMGT4

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 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-IBR-P174-01-EN-ISS1 CMGT 5

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 in excess of 425 °C (797 °F) for PV4 and 538 °C (1000 °F)

for PV6.

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-IBR-P174-01-EN-ISS1 CMGT6

2. General product information

Fig. 1 PV with screwed connections

2.1 General description

The PV4 and PV6 are piston isolation valves that have been designed for use on steam,

condensate and other liquid sytems.

Available types:

Screwed, butt weld

and socket weld

connections

PV4 Carbon steel body /bonnet and stainless steel internals

PV6 Stainless steel body / bonnet and internals

Standards

This product fully complies with the requirements of the Indian Boiler Regulations, 1950.

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

Note: For further data regarding the PV range see Technical Information sheet TI-IBR-

P174-02-EN-ISS1.

IM-IBR-P174-01-EN-ISS1 CMGT 7

Date code

Fig. 2 Name plate

2.2 Sizes and pipe connections

½", ¾", 1", 1¼", 1½" and 2"

Butt welded ends to EN 12627:1999BW - ASME B16.25

Screwed BSP (BS 21 / DIN 2999) or NPT to (ASME B1.20.1)

Socket weld ends to ASME B 16.11

Product

material

type

Maximum

allowable

pressure

Maximum

allowable

temperature

Minimum

allowable

temperature

Connection type

to appear here

(see Table 1)

Pressure class

Æ20 area to

be clear of

engraving

Date code to appear here

IM-IBR-P174-01-EN-ISS1 CMGT8

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2.3 PV4 Pressure / temperature limits

The product must not be used in this region.

A - BScrewed, socket weld and butt weld

Body design conditions API Class 800

PMA Maximum allowable pressure 136 bar g @ 38 °C (1 972.5 psi g @ 100 °F)

TMA Maximum allowable temperature 425 °C @ 76 bar g (797 °F @ 1 102 psi g)

Minimum allowable temperature -29 °C (-20 °F)

PMO Maximum operating pressure for

saturated steam service 101 bar g (1 465 psi g)

TMO Maximum operating temperature 425 °C @ 76 bar g (797 °F @ 1 102 psi g)

Minimum operating temperature -29 °C (-20 °F)

Note: For lower operating temperatures consult Spirax Sarco

Designed for a maximum cold hydraulic test pressure: 204 bar g (2 958.8 psi g)

Pressure bar g

Steam

saturation

curve

Temperature °C

Pressure psi g

Temperature °F

IM-IBR-P174-01-EN-ISS1 CMGT 9

2.4 PV6 Pressure / temperature limits

The product must not be used in this region.

A - BScrewed, socket weld and butt weld

Body design conditions API Class 800

PMA Maximum allowable pressure 132 bar g @ 0 °C (1 914.5 psi g @ 32 °F)

TMA Maximum allowable temperature 538 °C @ 67 bar g (1 000.4 °F @ 971.7 psi g)

Minimum allowable temperature -29 °C (-20 °F)

PMO Maximum operating pressure for

saturated steam service 84 bar g (1 218 psi g)

TMO Maximum operating temperature 538 °C @ 67 bar g (1 000.4 °F @ 971.7 psi g)

Minimum operating temperature -29 °C (-20 °F)

Note: For lower operating temperatures consult Spirax Sarco

Designed for a maximum cold hydraulic test pressure: 198 bar g (2 871.8 psi g)

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Pressure bar g

Temperature °C

Steam

saturation

curve

IM-IBR-P174-01-EN-ISS1 CMGT10

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

3. Installation

The valve can be installed

from the vertical to the

horizontal plane.

The valve can be installed

in vertical pipework.

The preferred orientation

for installation.

Fig. 3 Correct orientation for installation

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