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300 Consult “Precautions” page 327 before use, installation or service of MAC Valves.. Specifications for Intrinsically Safe V alves 301 52 series 304 400 series 304 92 series 305 Page
299
Consult “Precautions” page 327 before use, installation or service of MAC Valves..
Section 5
Intrinsically Safe Valves
300
Consult “Precautions” page 327 before use, installation or service of MAC Valves..
Specifications for Intrinsically Safe Valves
301
52 series
304
400 series
304
92 series
305
Page
301
Consult “Precautions” page 327 before use, installation or service of MAC Valves..
INTRINSICALLY SAFE CIRCUIT
In order to use an intrinsically safe valve in a hazardous location, the installation must be in accordance with the following installation diagram :
Intrinsically Safe Valves
There are 3 basic parts to an intrinsically safe circuit :
1. FIELD DEVICE
This is defined as the device that will be used in the hazardous location. In this case, the field device will be the intrinsically safe valve.
2. ASSOCIATED APPARATUS
This will be an energy limiting device also known as a barrier.
3. FIELD WIRING
Wiring used to connect the two above devices.
When the MAC intrinsically safe valves were tested for approval, they were tested and approved for the following atmospheres.
Class I, II, III
Division 1
Groups ; A, B, C, D, E, F, G
under the following parameters :
Vmax : 30 VDC
Imax : 175 ma
Ci : 0
Li : 0
Hazardous Location
Class I, II & III
Division 1
Group A, B, C, D,
E, F & G
FMRC Approved Single
or Dual Channel Positive
Polarity Intrinsic Safety
Barriers
Approved for
Class I, II, & III
Division 1
Group A, B, C, D,
E, F & G
Vmax = 30 v
Imax = 175 ma
Ci = 0
Li = 0
Control Room
Equipment
+ Red
- Black
Non-Hazardous Location
MAC Valve
Associated Apparatus