Spirax Sarco SV615 Manuale utente

IM-P316-03 CTLS Issue 14 1

1. Safety information

2. General product information

3. Supply

4. Handling

5. Before tting the valve

6. Installation

7. Damage prevention

8. Commissioning

9. Testing during use

10. Guidelines for setting

11. Maintenance

Printed in GB

3160050/14

SV615

Safety Valve

Installation and Maintenance Instructions

IM-P316-03

CTLS Issue 14

IM-P316-03 CTLS Issue 14

Safe operation of the unit can only be guaranteed if it is properly installed, commissioned and

maintained by a qualified person (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 these Installation and Maintenance Instructions, Name-plate and Technical Information

Sheet, check that the product is suitable for the intended use/application. The requirements of the

Pressure Equipment Directive (PED) have been satisfied and, if applicable, the product accordingly

bears the mark:

i) The product has been specifically designed for use on the fluids specified in the Technical

Information Sheets. (These fluids are in Group 2 of the above mentioned Pressure Equipment

Directive). The product’s 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 occurance, 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 protective 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.

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. Safety information

IM-P316-03 CTLS Issue 14 3

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 any protective clothing is required by yourself and/or others in the vicinity to

protect against the hazards of, for example, chemicals, high/low temperature, 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 these 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

Where the weight of the product exceeds 20 kg it is recommended that suitable lifting equipment

is used to prevent personal injury.

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 200 °C.

Many products are not self-draining. Take due care when dismantling or removing the product from

an installation (refer to Section 11, 'Maintenance').

IM-P316-03 CTLS Issue 14

1.14 Freezing

Provision must be made to protect products which are not self-draining against frost damage if they

are inoperative in environments where they may be exposed to temperatures below freezing point.

1.15 Safety information - Product specific

This product should not be dismantled without first releasing the compression on the control

spring. The soft seal version of this valve (SV615AV and SV615BV) contains a Viton component.

If the valve has been subjected to a temperature approaching 315 °C, the Viton material may have

decomposed and formed hydroflouric acid. Avoid skin contact and inhalation of any dust or fumes

as this acid causes deep burns and damage to the respiratory system.

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 Viton seal, special care must be taken to avoid potential health hazards

associated with decomposition/burning of this item.

Viton:

-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.

1.17 Returning products

Customers and stockists are reminded that under UK and 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.

IM-P316-03 CTLS Issue 14 5

Safety valve

Reducing

valve

Condensate

Steam supply

2.1 Description

The SV615 full lift, full nozzle safety valve is suitable for steam, air, inert industrial gas and non-hazardous

liquid service.

Available types

Valves are available in sizes ranging from DN15 to DN50 and have a bronze body with female screwed

connections and a stainless steel nozzle. There is also the option of a sanitary clamp inlet connection on

the smaller sizes. All valves have a closed bonnet with either a lifting lever or closed cap (gas tight cap

option). An optional soft seal disc is available in Nitrile (for air up to 120 °C), EPDM (for water) or Viton (for

air up to 200 °C).

Standards and approvals

The SV615 complies with the requirements of EN ISO 4126:2004 and carries the mark indicating full

compliance with the requirements of the Pressure Equipment Directive (PED). The Approval Authority and

Notied Body is the Royal and Sun Alliance.

Seat tightness complies with ASME/API STD 527- Revision 2002.

Certification

A manufacturers' Typical Test Report is provided as standard for each valve which will include valve set and

hydraulic test pressure. Also available on request is material certication in accordance with EN 10204 3.1.

2.2 Sizes and end connections

DN15, DN20, DN25, DN32, DN40 and DN50.

Inlet connections

Screwed BSP (BS 21 parallel) female

Screwed NPT female

1" Sanitary clamp compatible (DN15, DN20 and DN25 sizes only)

BS 4825/ISO 2852/DIN 32676

Outlet connections Screwed BSP (BS 21 parallel) or NPT female

Small bore drain

To safe area

2. General product information

Fig. 1

A typical installation of a safety valve, downstream of a pressure reducing valve station

IM-P316-03 CTLS Issue 14

The product must not be used in this region.

A - AMaximum operating temperature with metal seat.

A - BMaximum operating temperature with Viton seat.

A - CMaximum operating temperature with EPDM seat.

A - DMaximum operating temperature with Nitrile seat.

Body design conditions PN25

Set pressure range

Maximum

½" to 1¼" 18 bar g

1½" and 2" 14 bar g

Minimum 0.3 bar g

Temperature

Metal seat Minimum -90 °C

Maximum +230 °C

Nitrile seat * Minimum -30 °C

Maximum +120 °C

EPDM seat * Minimum -50 °C

Maximum +150 °C

Viton seat * Minimum -20 °C

Maximum +200 °C

Performance data

Overpressure

Steam 5%

Gas 10%

Liquid 10%

Blowdown limits

Steam, gas 10%

Liquids 20%

Derated coefficient of discharge values

Steam, gas 0.71

Liquid 0.52

Maximum permitted backpressure 10% of set pressure

Tested at a maximum inlet cold hydraulic test pressure of: 37.5 bar g

* Note: Soft seal inserts are not suitable for use on steam applications.

2.3 Pressure/temperature limits

Please contact Spirax Sarco,

when so required, for relevant

details regarding the maximum

allowable limits that the shell

can withstand.

Temperature °C

Pressure bar g

Steam

saturation

curve

Maximum set pressure

for 1½" and 2"

SV615

Maximum set pressure

for 1½" and 2"

SV615

IM-P316-03 CTLS Issue 14 7

2.4 Dimensions/weights (approximate) in mm and kg

Connection Flow

Size Inlet Outlet Lift A B C* D Ø E Ø Weight

Screwed

BSPF x BSPF

NPTF x NPTF

DN15 ½" ¾" 340 40 194 12 -1.3

DN20 ¾" 1¼" 555 44 229 20 -2.4

DN25 1" 1½" 660 48 242 24 -2.9

DN32 1¼" 2" 7. 2 5 70 58 279 29 -4.2

DN40 1½" 2½" 9.25 81 67 365 37 -8.8

DN50 2" 3" 11.5 0 96 80 420 46 -13.0

Sanitary clamp

DN15 1" ¾" 340 55 209 12 50.5 1.4

DN20 1" 1¼" 555 60 245 20 50.5 2.6

DN25 1" 1½" 660 64 258 24 50.5 3.1

* Applies to sealed cap and lever designs.

Sanitary clamp version

Screwed version

Fig. 2

D Ø

E Ø

IM-P316-03 CTLS Issue 14

2.5 Materials

No. Part Material

1Body Bronze BS EN 1982 CC491KM

2Nozzle

DN15

and

DN20

Stainless steel BS 970 431 S29

DN25

DN50

Stainless steel BS 3146 Pt2 Gr. ANC2

Sanitary

connection Stainless steel ASTM A276 316L

3Disc Stainless steel ASTM A276 316L

4Lever housing Bronze BS EN 1982 CC491KM

5Spring Chrome-vanadium alloy steel BS 2803 735 A50 HS

6Stem guide Brass BS 2872 CZ 121

7Spring end plate Brass BS EN 12165 - CW617N

8Stem Stainless steel BS 970 431 S29

9Adjustment screw Brass BS 2874 CZ 121

10 Lever Zinc plated SG iron

11 Pivot pin Stainless steel AISI 304

12 Circlip Stainless steel BS 2056 316 S42

13 Adjuster lock-nut Brass BS 2872 CZ 121

14 Soft seal disc

Stainless steel/Nitrile ASTM A276 316 /bonded Nitrile 4490 (90 IRHD)

Stainless steel/EPDM ASTM A276 316 /bonded EPDM 2064 (75 IRHD)

Stainless steel/Viton ASTM A276 316 /bonded Viton F81 (85 IRHD)

15 Sealed cap Bronze BS EN 1982 CC491KM

16 Cap seal Nitrile BS 2874 CZ 121

17 Skirt Brass BS 2874 CZ 121

18 Grub screw Steel

19 Ball Stainless steel

IM-P316-03 CTLS Issue 14 9

Soft seal disc option

Sealed

cap option

Fig. 3

1" Sanitary clamp

version

Screwed version

IM-P316-03 CTLS Issue 14

2.6 How to select a SV615 safety valve

Model type SV615 SV615

Configuration

A=Closed bonnet/easing lever

B=Closed bonnet/sealed cap

Seal material

S=Stainless steel

N=Nitrile

E=EPDM

V=Viton

Finish

P=Electroless nickel plated (ELPN)

Q = ELNP with stainless steel name-plate

Size

DN15, DN20, DN25, DN32, DN40 and DN50 DN15

BSPF xBSPF BSPF

BSPF

Connection

(inlet x Outlet)

NPTF xNPTF

Clamp xBSPF

Selection example Please note if ELNP nish is required, add 'P'.

SV615 A N DN15 BSPF x BSPF

How to order example: 1 o󰀨 Spirax Sarco SV615AN safety valve having DN15 screwed BSPF

x BSPF connection, set at 6 bar g.

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