Sample Procedure For Setting O 2 Gas Flow Rates On Flow Control Box; Sample Procedure For Setting N 2 Gas Flow Rates On Flow Control Box - ESAB B Series Installation, Operation And Maintenance Manual

SECTION 4
With the completion of the above settings the system is
now ready for operation.
4.3 SAMPLE PROCEDURE FOR
SETTING O GAS FLOW RATES ON
2
FLOW CONTROL BOX (Figure 4-4)
NOTE
This is a sample procedure only and the operator must
refer to the appropriate process data sheet.
SAMPLE SETUP:
Plasma - O , Shield - N
2
A. Place PLASMA GAS select switch SW-2 in O
position.
B. Place SHIELD GAS select switch SW-3 in O
position.
C. Place test switch SW-1 in START position.
D. For setting plasma start gas adjust valve NV-3, read
flow on flowmeter FM-2.
E. For setting shield preflow gas:
Adjust valve NV-6, read flow on flowmeter FM-3.
F. Move test switch SW-1 to CUT position.
G. For setting plasma cut gas adjust valve NV-1, read
flow on flowmeter FM-1.
H. For setting shield and mixing shield cut gas.
(1) Adjust valve NV-5 (N
FM-3.
(2) Adjust valve NV-4 (O
FM-4.
I. Move test switch SW-1 to OPERATE position. Flow
control is now set to operate.
plus O Mix
2 2
+ N
2
), read flow on flowmeter
2
), read flow on flowmeter
2
4.4 SAMPLE PROCEDURE FOR
SETTING N
FLOW CONTROL BOX (Figure 4-4)
This is a sample procedure only and the operator must
refer to the appropriate process data sheet.
SAMPLE SETUP:
Plasma - N or Air, Shield - N
2
gas mix.
To cut with air, connect the air source to the N
2
A. Place PLASMA GAS select switch SW-2 in N
position.
2
B. Place SHIELD GAS select switch SW-3 in N
position.
C. Place test switch SW-1 in START position.
D. For setting plasma start gas adjust valve NV-3, read
flow on flowmeter FM-2.
E. For setting shield preflow gas, adjust valve NV-6, read
flow on flowmeter FM-3.
F. Move test switch SW-1 to CUT position.
G. For setting plasma cut gas adjust valve NV-2, read
flow on flowmeter FM-2.
H. For setting shield and mixing shield cut gas.
(1) Adjust valve NV-5, read flow on flowmeter FM-3.
(2) Adjust valve NV-4, read flow on flowmeter FM-4.
I. Move test switch SW-1 to OPERATE position. Flow
control is now set to operate.
35
OPERATION
GAS FLOW RATES ON
2
NOTE
or Air plus Alternate
2
NOTE
inlet.
2
2
+ ALT
2