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2
EXAH - Explosion Resistant Head - Aluminum
Part
Process Conduit Block
Elements Dimensions
Number
Thread Thread Included
Wires
Figure
NEMA Rating
EXAHS08
EXAHD08
EXAHT08
EXAHTR08
NPT
1/2”
1/2”
1/2”
1/2”
NPT
3/4”
3/4”
3/4”
3/4”
EXTS
EXTD
EXTT
AWTR
Single / 2
Double / 4
Triple / 6
RTD / 6
Height
3.75” or
95.25 mm
Width
6.62” or
91.95 mm
Cap Diameter
3.60” or
91.44 mm
NFPA Hazardous
Area Classification
Class I, Division 1,
Group B, C, D
Class II Group E, F, G
Factory Mutual and
CSA Explosion Proof
Approval, NEMA 4
Max Temp. 175° (80°C)
1
EXAH
EXSH - Explosion Resistant Head - 316 Stainless
Part
Process Conduit Block
Elements Dimensions
Number
Thread Thread Included
Wires
Figure
NEMA Rating
EXSTHS08
EXSTHD08
EXSTHT08
NPT
1/2”
1/2”
1/2”
NPT
3/4”
3/4”
3/4”
EXTS
EXTD
EXTT
Single / 2
Double / 4
Triple / 6
Height
3.75” or
95.25 mm
Width
6.62” or
91.95 mm
NFPA Hazardous
Area Classification
Class I, Division 1,
Group B, C, D
Class II Group E, F, G
Factory Mutual and
CSA Explosion Proof
EXSTH
2
3
OTHS
FTHB or FTHW - Plastic Flip -Top Head - Black or FDA Approved White Polypropylene
Part
Process
Conduit
Block
Elements
Dimensions
Number
Thread
Thread Included
Wires
Figure
NEMA Rating
Black:
FTHBS02
FTHBS08
FTHBS12
FTHBD02
FTHBD08
FTHBD12
FTHBT02
FTHBT08
FTHBT12
White:
FTHWS02
NPT
1/8”
1/2”
3/4”
1/8”
1/2”
3/4”
1/8”
1/2”
3/4”
1/8”
NPT
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
AWTS
AWTS
AWTS
AWTD
AWTD
AWTD
AWTT
AWTT
AWTT
AWTS
AWTS
Single / 2
Single / 2
Single / 2
Double / 4
Double / 4
Double / 4
Triple / 6
Triple / 6
Triple / 6
Single / 2
Single / 2
Height
3.25” or 82.6 mm
Width
3.1” or 78.7 mm
Cap Diameter
3” or 76.2 mm
NEMA Rating -
Type 4X
Temperature
Rating - 198ºF
FTHB (Black) - FTHW (White)
3
Heads - Explosion Resistant, Heavy Duty - Aluminum, 316L Stainless Steel
Page 146
Phone: 617.527.4385 Fax: 617.964.3746 Email:
sales@asrichards.com