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Honeywell VQ400 Series Product Handbook

Universal gas class “a” combination valves
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CLASS "A" COMBINATION VALVES
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).
model VQ440/50
General
Technical
Installation and Operation
Various
Standard configurations
model VQ420/25
UNIVERSAL GAS VALVES
VQ400 Series
PRODUCT HANDBOOK
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EN2R--9018 9704R1--NE
Contents
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4 -- 5
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10
11 -- 12
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17 -- 26
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  Summary of Contents for Honeywell VQ400 Series

  • Page 1: Table Of Contents

    VQ400 Series CLASS “A” COMBINATION VALVES PRODUCT HANDBOOK 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.
  • Page 2: Description

    DESCRIPTION The VQ400 Series combination valves are suitable for the At the main body (4) flange connections are provided to control of gaseous fluids in gas consuming appliances mount either an: according to international standards. • internal by--pass valve to achieve high--low flame control The VQ400 Series combination valves meet the class “A”...
  • Page 3: Features

    FEATURES • Class “A” safety combination valve for control of • Various pressure tap points at main body available, gaseous fluids in gas consuming appliances in when no additional valves or pressure switches are accordance with international standards. used. • Main body with two gas valves with single seat. •...
  • Page 4: Specifications

    SPECIFICATIONS The specifications described in this chapter are related to the Electrical connections main gas valve, by--pass valve and pilot valve (see also VQ420/25: standard plug connection according PG11 on main Performance characteristics on page 6.). gas valves and additional valves. Optional: three pin plug connector (”DIN plug”) on main gas Models valves and additional valves.
  • Page 5 Table 1. Power consumption (W) main valve VQ400 Series 360 mbar 200 mbar Model Model 220 ... 240 Vac 100/110 Vac 24 ... 28 Vdc 220 ... 240 Vac 100/110 Vac 24 ... 28 Vdc VQ420Ax VQ425Ax VQ440Ax VQ450Ax Table 2. Power consumption (W) additional valves...
  • Page 6: Performance Characteristics

    PERFORMANCE CHARACTERISTICS Opening time Maximum working frequency The first valve (V1) opens in less than 1 second. 1 cycle per minute The second valve (V2), by--pass valve (Vb) and pilot valve Duty cycle (Vp) can be either a fast opening valve which opens in less Coil suitable for permanent energization than 1 second or a characterized opening valve which is Operational voltage range...
  • Page 7: Capacity Curves

    3/4” DN20 1” DN25 1 1/4” DN32 1 1/2” DN40 2” DN50 DN50 DN25 DN40 DN32 DN20 Vn (m Air dv=1 40 50 60 Methane dv 0.64 Fig. 1. Capacity curves for VQ400 Series class “A” combination valves EN2R--9018 9704R1--NE...
  • Page 8: Dimensional Drawings

    DIMENSIONAL DRAWINGS 3/4” HONEYWELL Fig. 2. Overall dimensions VQ400 Series (shown 2 valve slow) EN2R--9018 9704R1--NE...
  • Page 9 Table 2. Dimensions VQ400 Series (see also installation drawing). Model Connect. Overall Dimensions (mm) Weight (kg) ( g) (inch) main valve fast slow VQ420Ax 42.5 111.5 157.5 VQ420Bx--Cx--Ex 42.5 VQ420Dx--Fx 42.5 VQ425Ax 42.5 135.5 181.5 64.5 VQ425Bx--Cx--Ex 42.5 64.5 VQ425Dx--Fx 42.5...
  • Page 10: Installation

    INSTALLATION IMPORTANT WARNING Read these instructions carefully. Failure to follow the intructions could damage the product or cause a Tightness test after installation hazardous condition. Spray all pipe connections and gaskets with a Check the ratings given in the instructions and on the good quality gas leak detection spray.
  • Page 11: Adjustments And Final Checkout

    ADJUSTMENTS AND FINAL CHECKOUT The procedures described in this chapter are related to the adjustments on the main gas valve, pilot valve and by--pass valve. For adjustments on the other additional functionalities (e.g. pressure switch), refer to the included instruction sheet of the product in question in the package.
  • Page 12 Opening speed adjustment (see Fig. 9. ) 1. Remove the cap from top of the coil by loosening both screws. 2. Place screw driver in the slot of adjustment screw which is of center line. Flow regulation 3. Turn screw driver counter--clockwise to increase the opening speed and therefore the time till full opening will decrease.
  • Page 13: Construction And Working Principles

    CONSTRUCTION AND WORKING PRINCIPLES The VQ400 combination gas valves are 2 x class “A” fail The plunger is gliding on two anti--friction bearings. safe shut--off valves. Flow regulation is done by adjustable plunger stroke. The valve is opened by energizing the direct ON/OFF A strainer made out of steel AISI 303 is incorporated between operator.
  • Page 14: Standards And Approvals

    Regarding electric safety, the VQ400 Series combination valves can be used in appliances according to European The fact that the VQ400 Series combination gas valves are Standard for a household electrical requirements EN60335 certified to European Standard EN161 means that this series series and industrial applications.
  • Page 15: Ordering Information

    The second valve (V2) can be either fast table 3.) (= with flow regulation) or slow (= with flow regulation and For example you want to order a VQ400 Series combination adjustable opening). valve with the following specifications: 1” connection, second At the main body (4) flange connections are provided to valve slow, a pressure switch (Min.) at position V a by--pass...
  • Page 16 Table 3. VQ400 Series positions additional fuctionalities chart cabling specification VQ425AB1009--VWXY--A/B/C O.S. number Position specification Type Code Positions Plug C6058A136 (2.5 ... 50 mbar) C6058A140 (30 ... 150 mbar) By--pass valve External Pilot Internal Pilot Vent Valve A4021A + C6058A C6058A144 (100 ...
  • Page 17 CONFIGURATIONS Symbols and abbreviations main valve V1 -- V2 Closed Position Indication switch (CPI) internal by--pass/ high--low valve Vb pressure tap internal pilot valve Vp flange with pressure tap external pilot valve Vp Inlet strainer vent valve Vv pressure switch min or max Valve Proving System EN2R--9018 9704R1--NE...
  • Page 18 VQ400AA -- VQ400AB series combination valves Suffix Characteristics Fast Fast Fast Slow EN2R--9018 9704R1--NE...
  • Page 19 VQ400BA -- VQ400BB -- VQ400BC -- VQ400BD series combination valves Suffix Characteristics Fast Fast Fast Fast Slow Fast Fast Fast Slow Fast Slow Slow EN2R--9018 9704R1--NE...
  • Page 20 VQ400CA -- VQ400CB series combination valves Suffix Characteristics Fast Fast Fast Slow EN2R--9018 9704R1--NE...
  • Page 21 VQ400DA -- VQ400DB -- VQ400DC -- VQ400DD series combination valves Suffix Characteristics Fast Fast Fast Fast Slow Fast Fast Fast Slow Fast Slow Slow EN2R--9018 9704R1--NE...
  • Page 22 VQ400EA -- VQ400EB series combination valves Suffix Characteristics Fast Fast Fast Slow EN2R--9018 9704R1--NE...
  • Page 23 VQ400FA -- VQ400FB -- VQ400FC -- VQ400FD series combination valves Suffix Characteristics Fast Fast Fast Fast Slow Fast Fast Fast Slow Fast Slow Slow EN2R--9018 9704R1--NE...
  • Page 24 VQ400GA -- VQ400GB -- VQ400GC -- VQ400GD series combination valves Suffix Characteristics Fast Fast Fast Fast Slow Fast Fast Fast Slow Fast Slow Slow EN2R--9018 9704R1--NE...
  • Page 25 VQ400HA -- VQ400HB -- VQ400HC -- VQ400HD series combination valves Suffix Characteristics Fast Fast Slow Fast Fast Slow Slow Slow EN2R--9018 9704R1--NE...
  • Page 26 VQ400JA -- VQ400JB series combination valves Suffix Characteristics Fast Fast Fast Slow EN2R--9018 9704R1--NE...
  • Page 27: Replacement Parts And Accessories

    BB151151 components. BB152806 24 ... 28 Vdc Follow the installation instructions included in the package. Table 5. Rectifier boards for VQ400 Series Check that the selected part, accessory or add on Model O.S. Number Rated Packing component is the correct one for the application in...

This manual is also suitable for:

Vq420Vq440Vq425Vq450