Spirax Sarco SV615 User manual

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
© Copyright 2019
Printed in GB
3160050/14
SV615
Safety Valve
Installation and Maintenance Instructions
IM-P316-03
CTLS Issue 14

IM-P316-03 CTLS Issue 14
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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

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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').

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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.

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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

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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
or
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.
D
C
B
A
C
B
A
Sanitary clamp version
Screwed version
Fig. 2
D Ø
E Ø

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2.5 Materials
No. Part Material
1Body Bronze BS EN 1982 CC491KM
2Nozzle
DN15
and
DN20
Stainless steel BS 970 431 S29
DN25
to
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

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Soft seal disc option
14
Sealed
cap option
15
16
18
4
11
9
7
10
1
3
12
6
5
2
13
17
8
Fig. 3
19
1" Sanitary clamp
version
Screwed version

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2.6 How to select a SV615 safety valve
Model type SV615 SV615
Configuration
A=Closed bonnet/easing lever
A
B=Closed bonnet/sealed cap
Seal material
S=Stainless steel
N
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
x
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.