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1. Specification Sheet – Hoffman Purge/Pressurization Units
Model No. (Example):
Purge Unit Type
P =
Purge/Pressurization Unit
Purging Method
CF =
Continuous Flow
Mounting Style
B =
Back Plate (Top/Side Mount) 316L
Stainless Steel (NROB finish)
F=
Flush Mount (Side/Front Mount) 316L
Stainless Steel (NROB finish)
Size
1 =
Purge flow rate 8 scfm, 225 Nl / min
For limitations and conditions of use refer to the applicable certificate at the back of this manual.
Supply Pressure :
Flow & Pressure Sensors:
One sensor for both
"Low Pressure and Flow"
Spark Arrestor Unit:
Purge / Dilution Flow Rate
Material
Relief Valve
Opening Pressure:
Material:
Action on "Loss of Pressure":
Alarm Switch (Signals)
P CF B 1 YZ
60 psi / 0.4MPa / 4 barg must be regulated at inlet.
Maximum supply pressure 115 psi / 0.8MPa / 8 barg.
Compressed Air / Nitrogen
1 "WC / 250 Pa ( 2.5 mbarg )
0.4 to 8 scfm / 10 to 225 Nl/min
8 User selectable orifice plates
Stainless Steel
4" WC / 1 kPa (10 mbarg)
316L Stainless Steel, Spark Arrestor: Stainless Steel mesh, Neoprene Gasket
ALARM ONLY
Zone 2 /Division 2
"Alarm": Dry, VFC, SPSTN/O Contact
NI – Ex nA Non-incendive Circuits
V
<254 V ac rms
max
I
< 1 A
max
Zone 1 or 2 / Division 1 or 2
IS – Ex i circuits
U
= 30 Vdc
max
I
0.7 A
max
(Note: Not all codes are applicable)
Approvals / Certifications
Y =
Europe
EN 60079-0, EN 60079-2,
EN 61241-0, EN 61241-4
Sira 14ATEX1045X
0518
II 2 (2) G D
Ex [py] II T6 Gb
Ex [p] IIIC T85ºC Db
Tamb -20ºC +55ºC
IEC
IEC 60079-0, IEC 60079-2,
IEC 61241-4
IECEx SIR14.0019X
Ex [py] II T6 Gb
Ex [p] IIIC T85ºC Db
T
-20ºC +55ºC
amb
USA / Canada NFPA 496
UL E466718
Class I Div 1
Groups A, B, C & D
Hermetically Sealed Switch
Ex m IIC T4 Gc
V
=254 Vac rms
max
I
0.7 A
max
Z =
0518
II 3 (2) G D
Ex [pz Gc] IIC T6 Gb
Ex [p Dc] IIIC T85ºC
Tamb -20ºC +55ºC
Ex [pz Gc] IIC T6 Gb
Ex [p Dc] IIIC T85ºC
T
-20ºC +55ºC
amb
Class I Div 2
Groups A, B, C & D
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