Honeywell S245S Product specification sheet

0035

Construction

The safety valve comprises:

•Housing

• Spring bonnet

• Venting bonnet

• Rubber bellows

• Adjustment spring

Materials

• Brass housing

• Spring bonnet of cast iron, powder coated

• Venting bonnet of polyamid

• Bellows of silicon caoutchouc

• Spring steel adjustment spring

• Disc seal of Viton

S245S

Safety Valve

High performance valve for compressed air

Product specification sheet

Application

Safety valves of this type are direct loaded high performance
safety valves with lifting device. The venting bonnet discharges
the medium downwards.

Safety valves of this type protect fixed vessels containing granular
or powdered materials or silo tank vehicles containing fluids,
granular or powdered materials which are unloaded using
compressed air.

Special Features

• Sturdy metal construction

• Shakeproof lifting mechanism admitting no additional load

• Rubber bellows for protection of moving parts

• Venting bonnet for downwards discharge of fluid

• Approved to AD information sheet A 2 and to VdTÜV informa­tion sheet safety valve 100 for set relief pressure between 0.9
and 4.3 bar

• Set pressure adjustment at factory

• Set pressure settings possible between 0.5 and 30 bar in
steps of 0.1 bar

• Certified to Pressure Equipment Directive 97/23/EC, Refe­rence No. CE 0035

Range of Application

Compressed air for discharge of granular or powdered materials
from fixed vessels and for liquid, granular or powdered materials
from silo tank vehicles.

Technical Data

Operating temperature max. 180 °C
Pressure setting between 0.9 and 4.3 bar

in steps of 0.1 bar

Approval No. TÜV · SV · ..* · 930 · 28 · F/K/S · w · p

P = set pressure

Discharge rate αw = 0.52 (0.9 -1.3 bar)

αw = 0.59 (1.4 - 2.0 bar)
αw = 0.63 (2.1 - 4.3 bar)

Connection size G 1
..* valid Approval No.

1

/4" and G 11/2"

EN0H-1310GE23 R0807 • Subject to change

www.honeywell.com 39

S245S Safety Valve

Method of Operation

Safety valves are direct-acting. The disc seal is pushed up by the
pressure from the system against a spring which is holding the
valve closed. If the opening force exceeds the force exerted by
the spring, the valve disc is lifted off the valve seat and the valve
discharges the medium. In accordance with the requirements of
the standard, the full discharge capacity of the valve will be
achieved when the system pressure climbs to no more than 10%
above the set pressure of the valve. Full shutoff must be achieved
if the system pressure falls to below 90% of the nominal set pres­sure value.

The bellows protect the gliding parts inside the safety valve
against impurities.

Options

S245S- ... Z...= Special setting
Connection size

Set pressure

Ordering Example

S245B-11/4Z2.0 = Safety valve, size 1

1

/4", set pressure

2.0 bar

Connection size G 11/4"1

1

/2"
Weight kg 2.0 2.0
Dimensions mm

D

SW

0

h

H

28
18

258

55

28
20

258

55

40 www.honeywell.com

EN0H-1310GE23 R0807 • Subject to change