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
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Features
3
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Technical
Specifications
4 -- 5
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Performance characteristics
6
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Capacity curves
7
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Dimensional drawings
8 -- 9
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Installation and Operation
Installation
10
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Adjustments and final checkout
11 -- 12
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Construction and working principles
13
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Various
Standards and approvals
14
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Ordering information
15 -- 16
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Standard configurations
17 -- 26
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Replacement parts and accessories
27
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