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Performance Characteristics - Honeywell VQ400 Series Product Handbook

Universal gas class “a” combination valves
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PERFORMANCE CHARACTERISTICS

Opening time
The first valve (V1) opens in less than 1 second.
The second valve (V2), by--pass valve (Vb) and pilot valve
(Vp) can be either a fast opening valve which opens in less
than 1 second or a characterized opening valve which is
adjustable from 1 up to 30 seconds, at rated capacity.
The opening characteristic is factory set at approximately 6
seconds at the following conditions:
measured at 80 % of rated capacity
30 mbar supply pressure
nominal voltage
E
20
C
2,5 mbar pressure drop
no step pressure
Due to the influence of ambient temperature (--15 ... 60
the adjusted opening time of 6 seconds measured at 80% of
adjusted flow rate can vary
Closing time (V1, V2 , Vb and Vp)
Less than 1 second for all four valves.
+
/
4 seconds.
--
Maximum working frequency
1 cycle per minute
Duty cycle
Coil suitable for permanent energization
Operational voltage range
The combination gas valve will function satisfactory between
85% and 110% of the rated voltage.
Design life
Model
VQ420AA
VQ425AA
E
C)
VQ440AA
VQ450AA
6
Number of Cycles
600,000
600,000
300,000
300,000
EN2R--9018 9704R1--NE

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This manual is also suitable for:

Vq420Vq440Vq425Vq450