13
13
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 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 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
pneumatic Connection Requirements
ALL FITTINGS MAy BE CUSTOMER OR FACTORy FURNISHED
1. For system supply, one (1) SC-4 1/4" Male Straight Con-
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.
2. For enclosure supply, one (1) EFC-4 1/4" Flush Connector,
or one (1) EBC-4 1/4" Feed-Through Connector or
equivalent fitting per system.
3. For enclosure reference, one (1) EFC-4 1/4" Flush
Connector, or one (1) EBC-4 1/4" Feed-Through
Connector or equivalent fitting per system.
4. One (1) lot of 1/4" O.D., .035" wall thickness, welded or
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
5. For multiple enclosure connections, two (2) EPC-10 1/2"
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.
In addition to item numbers 1, 4 and 5 above, the following
fittings are required for all PM configurations.
1. For system supply on PM configurations, one (1) additional
EBC-4 or equivalent 1/4" Through Bulkhead Fitting per
system is required.
2. For atmospheric reference, one (1) PRB-4 or equivalent
1/4" female bulkhead fitting and stainless steel sintered
element is required.
pM pneumatic Connection Requirements
sC-4
nC-4
EBC-4
EFC-4
EpC-10
pRB-4
sYstEM sUpplY FIttInGs
EnClosURE sUpplY & REFEREnCE FIttInGs
MUltIplE EnClosURE ConnECtIon FIttInG
sYstEM atMospHERIC REFEREnCE FIttInG
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