Honeywell S245B Product specification sheet
Construction
The safety valve comprises:
•Housing
• Spring bonnet
• Valve cone
•Spring
Materials
• Brass housing
• Bonnet of brass (sizes
• Bonnet of cast iron (sizes 1
• Valve cone of brass
• Spring of stainless steel or spring steel
• Disc seal of Viton
1
/2" to 1")
1
/4" to 2"), powder coated
S245B
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. They protect pressurized
compressed air vessels (cylinders, tanks) against excessive pressure.
Safety valves of this type are used for compressors and other
industrial purposes.
Special Features
• Sturdy metal construction
• Shakeproof lifting mechanism admitting no additional load
• Approved by VdTÜV for pressure range from 0.5 - 30.0 bar
• Approved by ASME (American Society of Mechanical Engineers) for pressure range 2.8 - 30.0 bar (41 - 435 PSI)
• Certified to Pressure Equipment Directive 97/23/EC, Reference No. CE 0035
• Set pressure adjustment at factory
• Set pressure settings possible between 0.5 and 30 bar in
steps of 0.1 bar
• Light weight
Range of Application
Compressed air.
Non-toxic, non-corrosive and non inflammable gases which may
be discharged to atmosphere.
Not suitable for oxygen and steam.
Technical Data
Max. operating
temperature
Approval No. TÜV · SV · ..* - 340 D
ASME approval reference 30.492
Discharge rate TÜV αw = 0.73
Connection size G
..* valid Approval No.
180 °C ASME
260 °C TÜV / CE
P = set pressure
D
= nozzle diameter
0
ASME Kd = 0.863
1
/2" - G 2"
D/G 0.73 · p
0
EN0H-1309GE23 R0807 • Subject to change
www.honeywell.com 35
S245B Safety Valve
Connection size R1/2"3/4"1"1 1/4"1 1/2"2"
Weight (kg) 0.4 0.6 0.9 1.7 3.0 8.0
40
32
25
20
15
D
SW
10
h
0
H
12
138
27
15
153
36
16
185
41
18
231
50
20
293
60
22
367
80
Dimensions (mm)
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.
Options
S245B- ... ZA*...= Safety valve, set pressure 1.0 -12.0 bar
S245B- ... ZB*...=Safety valve,
set pressure < 1.0 or > 12.0 bar
Connection size
Set pressure
Ordering Example
S245B-3/4ZA* 5.8 = Safety valve (soft seat version), size
3
/4", set
pressure 5.8 bar
S245B-1ZB* 0.8 = Safety valve (soft seat version), size 1", set
pressure 0.8 bar
Corrective-Factor
36 www.honeywell.com
EN0H-1309GE23 R0807 • Subject to change
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