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pneumatic tubing Requirements
protective Gas supply Requirements
The protective gas supply to the protection system must
be a clean, instrument quality compressed air or nitrogen
and must contain no more than trace amounts of flammable
gas, vapor or dust.
The protective gas supply compressor intake must originate
in a nonhazardous location. Suction duct passing through
a hazardous location and the protection system tubing
and piping must be fabricated from noncombustible
materials suitable for prevailing hazards and environmental
conditions.
The protective gas supply must originate from a dedicated
instrument quality compressed air header (1/2" pipe or larger),
no farther than twenty (20) feet from the protection system.
Local compressors and gas cylinders should not be used
before consulting with Pepperl+Fuchs.
The protective gas supply to the protection system must
be equipped with a tamper-proof regulator set at 5 psi
maximum.
Exception: If the protected enclosure(s) is equipped with
a Pepperl+Fuchs Enclosure Protection Vent, the protective
gas supply to the protection system must not exceed
120 psi maximum, 5 psi minimum. (See page 4, "System
sC-4
sYstEM sUpplY FIttInGs
EFC-4
EnClosURE sUpplY & REFEREnCE FIttInGs
EpC-10
MUltIplE EnClosURE ConnECtIon FIttInG
RSPSupply - 1-888-532-2706 - www.RSPSupply.com
http://www.RSPSupply.com/p-6798-Hoffman-A1001YZUMC2-Purging-Pressurization-System-10-CF.aspx
1. For system supply, one (1) SC-4 1/4" Male Straight Con-
2. For enclosure supply, one (1) EFC-4 1/4" Flush Connector,
3. For enclosure reference, one (1) EFC-4 1/4" Flush
4. One (1) lot of 1/4" O.D., .035" wall thickness, welded or
5. For multiple enclosure connections, two (2) EPC-10 1/2"
nC-4
1. For system supply on PM configurations, one (1) additional
2. For atmospheric reference, one (1) PRB-4 or equivalent
EBC-4
pneumatic Connection Requirements
ALL FITTINGS MAy BE CUSTOMER OR FACTORy FURNISHED
nector or one (1) NC-4 1/4" Male Elbow Connector or
equivalent fitting per system.
notE: above fitting is required only if protection
system is furnished with an optional In line Filter Kit
(Model IlFK) accessory. see photo on page 9
One (1) Similar fitting which will connect the inert gas
supply tubing to the inert gas supply header connection
point and one (1) lot of 1/4" O.D., .035" wall thickness,
welded or seamless stainless steel tubing.
or one (1) EBC-4 1/4" Feed-Through Connector or
equivalent fitting per system.
Connector, or one (1) EBC-4 1/4" Feed-Through
Connector or equivalent fitting per system.
seamless stainless steel tubing.
notE: above fittings and tubing are not required if
system is furnished with an Enclosure Connection
Kit (Model ECK) accessory. see photo on page 9
Pipe Mounting Hubs or equivalent and 1/2" 150# rated
pipe couplings & unions per interconnection.
One (1) lot 150# rating 1/2" galvanized or aluminum pipe
and fittings, fully reamed and unrestricted.
pM pneumatic Connection Requirements
In addition to item numbers 1, 4 and 5 above, the following
fittings are required for all PM configurations.
EBC-4 or equivalent 1/4" Through Bulkhead Fitting per
system is required.
1/4" female bulkhead fitting and stainless steel sintered
element is required.
pRB-4
sYstEM atMospHERIC REFEREnCE FIttInG
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