EN2R--9018 9704R1--NE
15
ORDERING INFORMATION
VQ: class “A” combination gas valve
Additional functionalities
A: no extra (3
rd
) valve
B: internal by--pass/high--low valve
C: vent valve
D: internal by--pass and vent valve
E: external pilot valve
F: external pilot valve and internal
by--pass/high--low valve
G: internal by--pass valve and internal pilot
valve
H: internal by--pass valve and no 1
st
valve
J: external pilot valve and vent valve
4: line voltage
8: low voltage
straight flange connection
20:
DN20 (3/4”)
25:
DN25 (1”)
40:
DN40 (1 1/2”)
50:
DN50 (2”)
Specification number
Ordering Specification number
Characteristics 2
nd
valve and internal
by--pass valve
A: 2
nd
valve fast open and fast open
internal by--pass/high--low valve
B: 2
nd
valve slow open and fast open
internal by--pass/high--low valve
C: 2
nd
valve fast open and slow open
internal by--pass/high--low valve
D: 2
nd
valve slow open and slow open
internal by--pass/high--low valve
VQ 4 xx A A 1xxx -- VWXY A/B/C
Positions additional functionalities
see table 3., page 16
NOTE:
By--pass, internal/external pilot valve and vent
valve are always 3/4” threaded.
Internal by--pass valve have:
−
3/4” seat and coil assy for VQ400
DN20 -- 40
−
1” seat and coil assy for VQ400
DN50
Internal/external pilot valve have:
−
1/2” seat
Flanges to be ordered separately
(see Flange kits on page 4).
Pressure switch (Min.) is standard included
(position has to be specified, see table 3.)
Optional: Cabling (see electrical
connections on page 4.)
A: standard plug connection according
PG11
B: three pin plug connector (”DIN” plug)
C: complete cabling with Valve Proving
System (VPS)
Fig. 12. Ordering information VQ400 Series combination valves
How to select your valve
Standard the VQ400 Series combination valves are 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 pressure switches (Min. or Max.), a by--pass
valve, a pilot valve, a vent valve or a VPS + pressure switch.
These additional functionalities can can be mounted on
various positions of the main body of the VQ400. The
positions are specified by a letter code behind the O.S.
number. With the table below you are able to compose your
own customized combination valve to match your
requirements exactly.
Ordering example
After you have the decided the size and additional
functionalities and their characteristics, continue with
specifying the positions of the additional functionalities (see
table 3.)
For example you want to order a VQ400 Series combination
valve with the following specifications: 1” connection, second
valve slow, a pressure switch (Min.) at position V a by--pass
valve at position Y and DIN plug connections on all valves.
From figure 12. you find i.e. O.S. number VQ425AB1009
Continue with specifying the code behind the O.S number,
starting with position V and end with Y, using the table 3. For
the positions you don’t use, place a 0 (plug). In our example
the code behind the O.S. number is 1003B