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Buttery valve
series BSV
The buttery valves of the series BSV are DVGW approved to the Norm EN 161 with
cation number.
They are suitable to be used on residential and industrial combustion systems. They are particularly
suitable for both manual and automatic control of
gases belonging to the rst, second and third family
and of air.
Installation with two threaded anges from Rp 3/4
to Rp 2.
product identi-
TECHNICAL FEATURES
Body and anges Aluminium
Stem Stainless steel AISI 303
Buttery disc Aluminium or AISI 304
Threaded anges From Rp 3/4 to Rp 2 according to norms EN 10226
Max. pressure 500 mbar
Temperature -10 ÷ +60°C for gas -10 ÷ +80°C for air
Temperature on request -10 ÷ +110°C or +200°C for air
Control ratio
Valves ow Bidirectional
10:1
FEATURES
• Sturdy, compact construction, especially suitable for industrial applications
• Installation in any position
• Mechanical position indicator
• Lockable rotation angle from 0° to 90°
• Low leakage at valve in closed position 1% of max. kv
• Wide range of accessories on request:
• manual control lever
• 1 o 2 internal reductions with respect to the nominal diameter of the valve
• buttery disc AISI 304 for air temperature up to 200 °C
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FLOW CHART
Molle di taratura pressione
p (mbar)
VN (m3/h)
Aria
Air
Metano
Methane
Gas di città
Town gas
Propano
Propane
Butano
Butane
G.P.L.
L.G.P.
dv=1
dv=0,64
dv=0,45
dv=1,56
dv=2,09
dv=1,70
MODELS
MODEL
BSV25/20.B
BSV/25.B
DN
Connection
Rp
Orice diameter
(mm)
Manual control Free sharft
20 3/4 20 BSV20.A BSV20.B
25 1
20
25
BSV25/20.A
BSV25.A
32 1.1/4
40 1.1/2
50 2
NOTE
For max. temperature of 110 °C add “1” to letters “A” or “B”
For max. temperature of 200 °C add “2” to letters “A” or “B”
20
25
32
25
32
40
32
40
50
BSV32/20.A
BSV32/25.A
BSV32.A
BSV40/25.A
BSV40/32.A
BSV40.A
BSV50/32.A
BSV50/40.A
BSV50.A
BSV32/20.B
BSV32/25.B
BSV32.B
BSV40/25.B
BSV40/32.B
BSV40.B
BSV50/32.B
BSV50/40.B
BSV50.B
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DIMENSIONS
Dimensions in mm
DN F A B C H I L CH Weight Kg
20 Rp 3/4 60 86 22 98,5 42 42,4 42 0,8
25 Rp 1 60 86 22 98,5 42 42,4 42 0,7
32 Rp 1.1/4 90 95 25 128,5 45 70,7 60 1,5
40 Rp 1.1/2 90 95 25 128,5 45 70,7 60 1,4
50 Rp 2 90 95 25 128,5 45 70,7 74 1,6
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INSTALLATION AND OPERATING INSTRUCTIONS
1. WARNING
Installation, adjustment and maintenance of the valve must be carried out exclusively by skilled and authorized ser
vice technicians. Non-proper installation, adjustment, changes, use and maintenance may cause damages to the per
sonnel or to the equipment. Consequently, it is necessary to respect strictly the following instructions and local pre
scriptions for both the installation of electric devices, in case of motorized valves, and of gas systems.
2. INSTALLATION
2.1 Make sure that all operating data indicated on the valve label correspond to those of the system.
2.2 When installing the valve be sure that there is sufcient clearance above the gear cover and that it can be easily accessible in
order to perform manual servicing, automatic servicing by means of a gear motor or servicing by means of levers.
2.3 For the valves of the BSV series proceed as follows:
remove the protection plugs from the threaded anges,
screw the threaded anges to the inlet and outlet pipes, using exclusively sealing materials suitable for gases,
insert the BSV valve between the two anges with “O” rings,
tighten the anges to the valve body by means of the respective bolts.
2.4 The installation of the BSV valves can be performed in any position.
2.5 The valve can be installed in any location except where acid fumes or other deteriorating vapour may attack its metal parts or
where gas leaks or explosive vapours are present in the atmosphere.
2.6 Do not use the valve as a lever.
3. OPERATING
3.1 Before operating the following points must be checked carefully:
tightness of the external gas pipes;
that valve adjustment is performed within the requested angle range;
that mechanical locks or other retainers, which may damage the valve, have been removed.
3.2 Once these preliminary checks have been performed, the main gas tap can be opened and the operation test can be curried
out.
4. MAINTENANCE AND CHECKS
4.1 The BSV valves do not require any particular current maintenance because they do not need lubrication.
4.2 It is recommendable to check at least once a year that the mechanical connections have not been modied, especially in case
of systems, which do not function vibration-free.
5. REPLACEMENT
In case replacement of the BFV valve is necessary, proceed as follows:
5.1 Close the main gas tap.
5.2 Remove the mechanical connections from the valve axis.
5.3 Remove the valve body from the inlet and outlet anges by loosening the fastening screws from the respective nuts.
5.4 Install the new valve proceeding as per instructions reported in the foregoing chapters.
All the reported data are subject to be changed without notice. form140906
Econex s.r.l. - Via Francesco De Sanctis, 53 - I-20141 Milano
Tel. +39 0289502912 - Fax +39 028463084 - www.econex.it - info@econex.it
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