Honeywell VQ400 Series User manual

CLASS “A” COMBINATION VALVES
PRODUCT HANDBOOK
VQ400 Series
UNIVERSAL GAS VALVES
EN2R--9018 9704R1--NE
model VQ440/50
model VQ420/25
APPLICATION
The VQ400 Series class “A” safety combination valves are
used for control and regulation of gaseous fluids in gas power
burners, atmospheric gas boilers, melting furnaces,
incinerators and other gas consuming appliances.
These combination valves are available in two versions:
model VQ420/25 (pipe sizes 3/4” and 1”)
and model VQ440/50 (pipe sizes 1 1/2” and 2”).
The 1 1/4” connection is obtained by using a DN32 flange kit
on a VQ440 body.
The features and specifications of both models are identical
(unless specified otherwise).
Contents
General
Description 2.......................................
Features 3.........................................
Technical
Specifications 4 -- 5.................................
Performance characteristics 6........................
Capacity curves 7...................................
Dimensional drawings 8 -- 9.........................
Installation and Operation
Installation 10......................................
Adjustments and final checkout 11 -- 12...............
Construction and working principles 13................
Various
Standards and approvals 14..........................
Ordering information 15 -- 16.........................
Standard configurations 17 -- 26......................
Replacement parts and accessories 27................
Subject to change without notice. Printed in the Netherlands.

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DESCRIPTION
The VQ400 Series combination valves are suitable for the
control of gaseous fluids in gas consuming appliances
according to international standards.
The VQ400 Series combination valves meet the class “A”
specification according EN161.
The VQ400 Series combination valves have straight flanged
pipe connection from 3/4” up to 2”.
The VQ400 Series combination valves are standard equipped
with two main valves V1 and V2. Safety valve V1 is always
fast opening/closing. The second valve (V2) can be either fast
(= with flow regulation) or slow (= with flow regulation and
adjustable opening).
At the main body (4) flange connections are provided to
mount either an:
•internal by--pass valve to achieve high--low flame control
•internal or external pilot valve
•vent valve
•pressure switch (Min. or Max.)
•Valve Proving System (VPS) + pressure switch.
These accessories can be mounted on various positions of
the main body of the VQ400.

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FEATURES
•Class “A” safety combination valve for control of
gaseous fluids in gas consuming appliances in
accordance with international standards.
•Main body with two gas valves with single seat.
•Internal by--pass valve to achieve high--low flame
control.
•internal or external pilot valve.
•Vent valve.
•Options for mounting flanged minimum and maximum
pressure switches.
•Valve Proving System (VPS).
•Closing time: < 1 second.
•Coils field replaceable.
•Coils suitable for permanent energization.
•Fine mesh screen between inlet flange and main body.
•Various pressure tap points at main body available,
when no additional valves or pressure switches are
used.
•Second main valve, either with adjustable flow
regulator (fast), or characterized opening mechanism
(slow) with adjustable maximum flow rate and step
pressure.
•Rectifier board with LEDs (VQ440/50 only) to indicate
energization of coil
•Rectifier boards field replaceable.
•Plug connector according to DIN 43650: standard for
VQ440/50, optional for VQ420/25.
•PG11 cable strain relief standard at VQ420/25.
•Optional mounting of Closed Position Indication
switch (CPI) at bottom of safety valve V1.

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SPECIFICATIONS
The specifications described in this chapter are related to the
main gas valve, by--pass valve and pilot valve (see also
Performance characteristics on page 6.).
Models
VQ420/25 (DN20 and DN25)
VQ440/50 (DN40 and DN50)
NOTE: DN32 connection is obtained with a flange kit on
VQ440 body.
The main gas volume is adjustable at 2nd main valve.
The start flow is adjustable at slow open 2nd main valve.
Dimensions
See dimensional drawings and table on page 8 and 9.
Pipe sizes
Main body :Inlet and outlet straight flange connection 3/4”, 1”,
1 1/4”, 1 1 /2” and 2”.
Pilot valve and vent valve : outlet 3/4” thread.
(all internal pipe thread according to ISO 7--1)
Capacity
Main body : see capacity curves on page 7.
Pilot valve and vent valve on VQ400 DN20 ... 50 : as VE4020
By--pass on VQ400 DN20 ... 40 : as VE4020
By--pass on VQ400 DN50: as VE4025
(see capacity curves VE4000 Series product handbook)
Maximum operating pressure
200 or 360 mbar, depending on the model
Connections
•Pressure taps at inlet and outlet flanges.
•
Optional: 1/4” plug connection for Closed Position
Indication switch (CPI) at bottom of safety valve V1.
At the main body (4) flange connections are provided to
mount either an:
•internal by--pass valve to achieve high--low flame control
•internal or external pilot valve
•vent valve
•pressure switches (Min. or Max.)
•Valve Proving System (VPS).
By--pass valve/high--low valve
Two stage valve 3/4” is used at VQ420/425/440 series valves.
Two stage valve 1” is used at VQ450 series valves.
Torsion and bending stress
Pipe connections meet group 2 according to EN161
requirements.
Supply voltages
Line voltage: 220 ... 240 Vac, 50/60 Hz
200 Vac, 50/60 Hz
100/110 Vac, 50/60 Hz
24 ... 28 Vdc
Other voltages on request.
Electrical equipment
DC current coils with separated rectifier inside the cover.
Electrical connections
VQ420/25: standard plug connection according PG11 on main
gas valves and additional valves.
Optional: three pin plug connector (”DIN plug”) on main gas
valves and additional valves.
VQ440/450: standard three pin plug connector (”DIN plug”) on
main gas valves.
Optional: three pin plug connector (”DIN plug”) on additional
valves.
Ambient temperature range
--15 ... 60 °C
Coilinsulation solenoid valves
Insulation material according class F.
Enclosure
IP 54
IP65 (optional, only for VQ420/25)
Body material
aluminium alloy die cast
Strainer
AISI 303 steel
Closing spring
AISI 302 steel
Valve plunger
Chrome plated Fe 360B steel sliding on anti--friction bearing.
Seals and gaskets
Hydrocarbon resistant NBR rubber type.
Flange kits
There are two different series of kits available:
The first series of kits consist of: 1 flange with sealing plug,
1 O--rings and 4 screws.
O.S. number Size (Rp) Remarks
KTCOMB20 3/4” with plug
KTCOMB25 1” with plug
KTCOMB32 11/4” intended for 440
body, with tap
KTCOMB40 11/2” with tap
KTCOMB50 2” with tap
The second series of kits consist of: 1 flange with sealing plug
or cast pressure tap, 1 strainer, 1 O--rings and 4 screws.
O.S. number Size (Rp) Remarks
KTCOMS20 3/4” with plug
KTCOMS25 1” with plug
KTCOMS32 11/4” intended for 440
body, with tap
KTCOMS40 11/2” with tap
KTCOMS50 2” with tap

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Table 1. Power consumption (W) main valve VQ400 Series
M
o
d
e
l
360 mbar 200 mbar
Model 220 ... 240 Vac 100/110 Vac 24 ... 28 Vdc 220 ... 240 Vac 100/110 Vac 24 ... 28 Vdc
V1 V2 V1 V2 V1 V2 V1 V2 V1 V2 V1 V2
F S F S F S F S F S F S
VQ420Ax 14 14 14 14 14 14 17 17 17 14 14 14 14 14 14 17 17 17
VQ425Ax 20 20 20 18 18 18 24 24 24 20 20 20 18 18 18 24 24 24
VQ440Ax 41 41 41 48 48 48 64 64 64 40 40 40 47 47 47 67 67 67
VQ450Ax 60 60 60 65 65 65 67 67 67 41 41 41 48 48 48 64 64 64
Table 2. Power consumption (W) additional valves
Additional
v
a
l
v
e
360 mbar 200 mbar
valve 220 ... 240 Vac 100/110 Vac 24 ... 28 Vdc 220 ... 240 Vac 100/110 Vac 24 ... 28 Vac
3/4”1” 3/4” 1” 3/4” 1” 3/4” 1” 3/4” 1” 3/4” 1”
by--pass valve 14 20 14 18 17 24 14 20 14 18 17 24
pilot valve 14 -- 14 -- 17 -- 14 -- 14 -- 17 --
vent valve 14 -- 14 -- 17 -- 14 -- 14 -- 17 --

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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
−20
E C
−2,5 mbar pressure drop
−no step pressure
Due to the influence of ambient temperature (--15 ... 60
E C)
the adjusted opening time of 6 seconds measured at 80% of
adjusted flow rate can vary +/-- 4 seconds.
Closing time (V1, V2, Vb and Vp)
Less than 1 second for all four valves.
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 Number of Cycles
VQ420AA 600,000
VQ425AA 600,000
VQ440AA 300,000
VQ450AA 300,000

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CAPACITY CURVES
Capacity curve combination gas valves
Table 1. Capacity in m3/hair at a p=2,5mbar
3/4” DN20 1” DN25 1 1/4” DN32 1 1/2” DN40 2” DN50
811 25 31 40
60
50
40
30
20
10
8
6
5
1
2
4
3
4
3
2
1
0.1
0.2
0.3
0.4
0.5
0.6
0.8
10 20 30 40 50 60 80 200 300
p(kPa)
p (mbar)
Vn (m3/h)
Air dv=1
Methane dv 0.64 100
10865432
1234568
100 300200806050403020
aa
5
6
DN20
DN40
DN50
DN32
DN25
Fig. 1. Capacity curves for VQ400 Series class “A” combination valves

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DIMENSIONAL DRAWINGS
A
A
B
D
DBC
C
HH
HONEYWELL
62
188
3/4”
151
E
Fig. 2. Overall dimensions VQ400 Series (shown 2nd valve slow)

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Table 2. Dimensions VQ400 Series (see also installation drawing).
Model Connect.
(
i
h
)
Overall Dimensions (mm) Weight (kg)
(inch) A B CD E
g
(
g
)
2nd main valve
fast slow
VQ420Ax 3/4 204 42.5 111.5 157.5 60 108 3.5
VQ420Bx--Cx--Ex 3/4 204 42.5 112 157 60 177 4.8
VQ420Dx--Fx 3/4 204 42.5 112 157 60 247 6.1
VQ425Ax 1204 42.5 135.5 181.5 64.5 108 5.0
VQ425Bx--Cx--Ex 1204 42.5 136 181 64.5 177 6.3
VQ425Dx--Fx 1204 42.5 136 181 64.5 247 7.6
VQ440Ax 11/2 297 62 174 228 63.5 119 10.7
VQ440Bx--Cx--Ex 11/2 297 62 174 228 63.5 209 11.9
VQ440Dx--Fx 11/2 297 62 174 174 63.5 300 13.5
VQ450Ax 2297 62 174 (184) 228 (238) 63.5 119 12.1
VQ450Bx--Cx--Ex 2297 62 174 (184) 228 (238) 63.5 209 14.1
VQ450Dx--Fx 2297 62 174 (184) 228 (238) 63.5 300 16.4
(..) 360 mbar versions

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INSTALLATION
IMPORTANT
1. Read these instructions carefully. Failure to follow the
intructions could damage the product or cause a
hazardous condition.
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. The installation has to be carried out by qualified
personel only.
4. Carry out a thorough checkout when installation is
completed.
CAUTION
: Turn off gas supply before installation.
: Disconnect power supply to the valve actuator
before beginning the installation to prevent
electrical shock and damage to the equipment.
: Do not remove the seal over valve inlet and outlet,
until ready to connect piping.
: The valve must be installed so that the arrow on
the valve points in the direction of the gas flow
(gas pressure helps to close the valve).
Mounting position
The gas valve can be mounted plus or minus 90 degrees from
the vertical.
Mounting location
The distance between the gas valve and the wall/ground,
must be at least 30 cm.
Main gas connection
1. Take care that dirt does not enter the gas valve during
handling
2. Remove the flanges from the valve.
3. Use a sound taper fitting with thread according to
ISO 7--1 or new, properly reamed pipe free from swarf.
4. Apply a moderate amount of good quality thread
compound to the pipe for fitting only, leaving the two
end threads bare, PTFE tape may be used as an
alternative.
5. Screw the flanges onto the pipes.
6. Ensure that the inlet and outlet flanges are in line and
separate from each other enough to allow the valve to
be mounted between the flanges without damaging the
O--ring.
7. Place the O--ring. If necessary grease it slightly to keep
it in place.
8. Mount the gas valve between the flanges using the
bolts for each flange.
9. Complete the electrical connections as instructed in the
Electrical Connection section.
WARNING
Tightness test after installation
: Spray all pipe connections and gaskets with a
good quality gas leak detection spray.
: Start the appliance and check for bubbles. If a
leak is found in a pipe connection, remake the
joint.
A gasket leak can usually be stopped by
tightening the mounting screws. Otherwise,
replace the gas valve.
Electrical connection
CAUTION
: Switch off power supply before making electrical
connections.
: All wiring must comply with local codes, ordiances
and regulations.
Use lead wire which can withstand 105 °C ambient.
The electric ON/OFF operator is provided with a terminal
block for electrical connections.
Wiring
Follow the instructions supplied by the appliance
manufacturer. Refer to Fig. 3. and Fig.
21
3
V2
V1 N
Fig. 3. Three pin electrical plug connector according to
ISO 4400.
V1 V2
3
1
2
Fig. 4. Connection diagram VQ400