Control valves

Safety valves

Local regulations may restrict the use of this product to below the conditions quoted.

In the interests of development and improvement of the product, we reserve the right to change the specification without notice.

© Copyright 2014

TI-P316-01

CH Issue 16

SV615

Safety Valve

Description

The SV615 full lift, full nozzle safety valve is suitable for steam,

air, inert industrial gas and non-hazardous liquid service.

Applications

The SV615 is suitable for the protection of steam or hot water boilers,

generators, vessels, receivers and air compressors, autoclaves,

downstream of pressure reducing valves and for general pressure

relief applications.

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 1" 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 is available in Nitrile, EPDM or Viton. Where frequent

washdown occurs or aesthetic appearance is a consideration,

this product can also be supplied with an electroless nickel plated

(ELNP) finish to the body, lever housing (or sealed cap) and lever.

A mechanically fastened stainless steel name-plate can also be

provided - For full details contact Spirax Sarco.

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 European Pressure Equipment Directive

97/23/EC. The Approval Authority and Notified 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 certification in

accordance with EN10204 3.1.

Sizes and end connections

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

Inlet connections

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

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

BS 4825 / ISO 2852 / DIN 32676 - Safety valves with these connections

have a surface finish of 0.8 μm on primary wetted parts.

Outlet connections

Screwed BSP (BS 21 parallel) or NPT female connection.

Pressure/temperature limits

1" Sanitary

clamp version

PN25

18 bar g

14 bar g

0.3 bar g

Minimum

-90°C

Maximum

+230°C

Minimum

-30°C

Maximum

+120°C

Minimum

-50°C

Maximum

+150°C

Minimum

-20°C

Maximum

+200°C

Steam

5%

Gas

10%

Liquid

10%

Steam, gas

10%

Liquids

20%

Steam, gas

0.71

Liquid

0.52

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 steam applications.

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Pressure bar g

Maximum

Minimum

Metal seat

1⁄2" to 11⁄4"

11⁄2" and 2"

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Screwed

female version

Body design conditions

Set pressure range

Temperature

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Steam

saturation

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Nitrile seat *

EPDM seat *

Viton seat *

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Overpressure

The product must not be used in this region.

Maximum operating temperature with metal seat.

Maximum operating temperature with Viton seat.

Maximum operating temperature with EPDM seat.

Maximum operating temperature with Nitrile seat.

Performance data

Maximum permitted backpressure

Blowdown limits

Derated coefficient

of discharge values

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