What is the difference between double compression
Answers were Sorted based on User's Feedback
Answer / shirsendu saha
I don't think any of the above answers are completely correct.
Single compression and double compression glands are used on
the basis of area classification.those who are affiliated
with oil and gas sector they will easily understand about
area classification.in zone 0 where the presence of
hydrocarbon is obvious (IIC)double compression gland is used
because the flame path in case of double compression gland
is much more than in case of single compression gland. the
logic behind this is that if there is any explosion inside
the terminal box of the motor no flame should be able to
come out through the cable gland in order to prevent fire
hazards but where there is no presence of hydrocarbons i.e
no danger of fire hazards (IIA/ IIB)single compression glads
are used. it has nothing to do with mechanical strength.
even in case of lighting fixtures used in IIC zone double
compression glands are used.
|Is This Answer Correct ?||89 Yes||13 No|
The basic diffeance between single and dobble compression
1. Parts of Double comp
a. Gland body
b. Gland body Nut
d. Cone Ring
e. Neopen Rubber seal.
f. Rubber Washer
i. Check Nut.
2. Single Comp Parts
a. Gland body
b. Gland body Nut
c. Neopen Rubber seal.
d. Rubber Washer
e. Check Nut
f. Flat washer
The Basic differance between Single and Double Comp is
1. In Single comp there no cone and cone ring. The
mechanical support for the cable is only Neopen rubber
seal,When u tighting the cable.
2. In double camp gland the mechanical support to the cable
only cone and cone ring. When doing glanding the cable
arrmour sits on the cone and cone ring act as a lock for
|Is This Answer Correct ?||44 Yes||9 No|
Answer / shailendra
Double compression glands provide extra support to the
heavy armoured cables entering or exiting the panel while
single compression glands are used fore light armoured
|Is This Answer Correct ?||42 Yes||12 No|
Answer / nikhil
Double compersion Glands are having always EXd enclosure
providing long fault path and earthing to braid of the
|Is This Answer Correct ?||5 Yes||11 No|
Answer / rajesh nayak
Double compression glands used in FLP motors for intrinsic
safety where as single compression glands used in every motors
|Is This Answer Correct ?||15 Yes||24 No|
Answer / ajay
Although # 4 answer is on right track. But apart from area
classification, mech grip is also equally imp. to Sum up:
Ex'e'(single compression) equal to IP54.(IEC 60079-0,7)
Ex'd' (double compression) equivalent IP66. (IEC 60079-1).
Double is better always... but may not be necessary for all
|Is This Answer Correct ?||1 Yes||10 No|
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