Azbil Micro Flow MQV9005 - Page 81

7-13
Chapter 7. SPECIFICATIONS
z
MQV0050(J, K)/0200/0500
0 40 80 120 160
200
0
100
200
400
300
500
600
(1)
(2)
(3)
(4)
0 20 40 60 80 100 120
0
40
80
120
160
200
240
MQV0200 MQV0500
0 2 4 6 8 10
0
10
20
40
30
50
60
(1)
(2)
(3)
(4)
MQV0050(J, K)
(1)
(2)
(3)
(4)
Dierential pressure [kPa]
Flow rate [L/min(standard)]
Dierential pressure [kPa]
Flow rate [L/min(standard)]
Dierential pressure [kPa]
Flow rate [L/min(standard)]
Outlet pressure condition
(1) 150 kPa(gauge)
(2) 50 kPa(gauge)
(3) 0 kPa(gauge)
(4) –50 kPa(gauge)
Outlet pressure condition
(1) 150 kPa(gauge)
(2) 50 kPa(gauge)
(3) 0 kPa(gauge)
(4) –50 kPa(gauge)
Outlet pressure condition
(1) 150 kPa(gauge)
(2) 50 kPa(gauge)
(3) 0 kPa(gauge)
(4) –50 kPa(gauge)
Handling Precautions
•
If the outlet pressure is different from the values graphed on the previous
page, calculate the flow rate using the appropriate equation below.
(1) When P2 / P1 > 0.53,
Q=C1 (P1-P2) P2
(2) When P2 / P1 0.53,
Q=C2 • P1
P1: Inlet absolute pressure [kPa (abs)]
P2: Outlet absolute pressure [kPa (abs)]
(Absolute pressure = gauge pressure + 101.3 kPa)
Q: Flow rate [L/min (standard)] , ([mL/min (standard)] for MQV9005/9020/9200)
C1 and C2: Constant values by model
• MQV9005: C1= 0.7097, C2=0.4653
• MQV9020: C1= 0.7097, C2=0.4653
• MQV9200: C1= 3.123, C2=1.559
• MQV9500: C1= 0.03123, C2=0.01559
• MQV0002: C1= 0.03123, C2=0.01559
• MQV0005: C1= 0.3123, C2=0.1559
• MQV0020: C1= 0.3123, C2=0.1559
• MQV0050(B, C): C1= 0.5529, C2=0.2760
• MQV0050(J, K): C1= 2.212, C2=1.104
• MQV0200: C1= 2.212, C2=1.104
• MQV0500: C1= 4.115, C2=2.054
≤
•
When used with the gases other than air, convert the flow rate using the
following equation:
Flow rate = Flow rate in air ÷ specic gravity of gas to be controlled
Example: When using the MQV0002 with CO
2
, inlet pressure = 10 kPa (gauge),
and outlet pressure = 0 kPa (gauge),
1.0 L/min (standard)
÷ 1.53 = 0.81 L/min (standard)
Specific gravity of standard compatible gas (air is taken as 1.0)
Gas type Specific gravity
Oxygen 1.11
Argon 1.38
Carbon dioxide (CO
2
) 1.53
Natural gas 13A (LNG) 0.64
Methane 0.56
Propane 1.56
Butane 2.08