Bardiani Valvole B925 User manual

USE AND MAINTENANCE MANUAL
MIXPROOF Valve B925 - B925B
GB-IST-B925-0910

(GB-IST-B925-0910) 2/35
The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice.
Foreword
This instruction manual is an integral part of the valve delivery.
• To use the Atex valve model is obligatory to consult the appropriate
manual.
• Always read it carefully before using the valve.
• Always keep it for future reference.
All rights are reserved. It is forbidden to reproduce or transit any part of the instruction manual by any means,
either electronic or mechanical, including photo copies, recording or any other memorisation or retrieval system
for purposes other than the exclusively personal use by the purchaser – without prior written permission by the
manufacturer.
This instruction manual is expressly intended for use by technicians. Therefore, some information which can easily
beinferredbyreadingthetextandexaminingtheillustrationsanddrawingshasnotbeenfurtherspecied.The
publisher is not responsible for any consequences of incorrect operations by the user.
Thedataandinformationinthisinstructionmanualaresubjecttomodicationsorupdateswithoutanyfurther
notice or obligations on the part of the manufacturer.
1. Safety/caution signs ...........................................................................................................3
2. General safety precautions.................................................................................................3
3. Receiving/Unpacking/Storage ............................................................................................4
4. Installation ..........................................................................................................................5
5. Operation............................................................................................................................7
6. Troubleshooting..................................................................................................................8
7. Cleaning .............................................................................................................................9
8. General maintenance .........................................................................................................10
9. Planned maintenance.........................................................................................................11
10. Planned maintenance.........................................................................................................12
11. Disassembly of valve type B925 - B925B...........................................................................13
Drawing B925.....................................................................................................................16
Drawing B925B...................................................................................................................17
12. Assembly of valve type B925 - B925B ...............................................................................18
13. Disassembly of divert valve type B925 - B925B.................................................................22
Drawing divert B925 ..........................................................................................................26
Drawing divert B925B.........................................................................................................27
14. Assembly of divert valve type B925 - B925B .....................................................................28
15. Part list.............................................................................................................................. 33
16. Technical data.....................................................................................................................34
Warranty .............................................................................................................................35
Disclaimer...........................................................................................................................35
Index

The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice. (GB-IST-B925-0910) 3/35
2. General Safety Precautions
General WARNING sign, which indicates that special instructions MUST be followed
to avoid serious personal injuries.
General CAUTION sign, which indicates that special instructions MUST be
followed to avoid damage of equipment and environment
Indicates IMPORTANT information, which improves the understanding of the in-
structions.
ALWAYS read the technical data before installation, operation and maintenance.
ALWAYS use authorised personal to install, operate and service the valve. The personal should
know the valve and the instruction manual thoroughly.
ONLY use the valve for the designed purpose.
ALWAYS handle heavy valves carefully and use lifting tools where necessary.
ALWAYS pay attention to possible loose valve parts when unpacking the delivery.
ALWAYS connect air supply carefully and disconnect after use.
ALWAYS connect electrical supply carefully and disconnect after use.
NEVER touch moving valve parts.
NEVER touch a hot valve.
ALWAYS handle cleaning agents carefully.
NEVER remove a valve from piping or disassemble it when the valve or piping are pressurised.
We cannot be held responsible for incorrect
installation, operation and maintenance!
NOTE!
1. Safety/Caution Signs

A
B
(GB-IST-B925-0910) 4/35
The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice.
CAUTION!
1. UNPACK AND CHECK VALVE DELIVERY:
A. Complete valve
B. Instruction manual
2. IDENTIFY VALVE TYPE SUPPLIED:
B925: Valve Mixproof
B925B: Valve Mixproof
3. LIFTING OF HEAVY VALVE:
- Use lifting tool, if necessary.
- Fix valve to lifting tool.
4. HANDLING OF LOOSE VALVE PARTS:
- Avoid falling loose valve parts.
- Assemble and tighten loose parts.
5. PACKING MATERIAL:
- Inspect internal of valve.
- Remove material and dispose
of according to current directives.
6. INSPECTION/CLAIM:
- Inspect valve connections.
- Document /verify damage, missing
or wrong parts.
- Use current claim procedure if
necessary.
7.STORAGE/PROTECTION:
- Avoid dust,humidity,wetareas,he
at and similar.
- Avoid vibration.
- Min.: - 10 °C
- Max.: + 50 °C
3. Receiving/Unpacking/Storage
- Opening
- Air connections
- Electrical connections
(for Giotto-Top®)
Packing
material
Satety valve
protection!
B925 B925BB925
DIVERT
B925B
DIVERT

The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice. (GB-IST-B925-0910) 5/35
1. CONNECTION OF AIR AND ELECTRICITY SUPPLY:
- Use authorised personnel to install/connect the valve.
- Ensure correct air pressure and quality (see page 34).
- Ensure correct electrical supply for Giotto-Top®(see Giotto-Top®instruction manual).
Electrical Connections
Giotto - Top®
2. DISCONNECT SUPPLIES AFTER USE:
- Disconnect air supply.
- Disconnect electrical supply (for Giotto-Top®).
3. MOVING VALVE PARTS:
-Neverstickngersintovalveports.
- Never touch the shaft of the valve whilst it is working
Air
Electrical Connections
Giotto - Top®Air
Air
Air
Air
Air
Air
Air
Air
Support
Risk of
damage!
4. AVOID VALVE OVERLOADING AND COMPENSATE FOR:
- Vibration
- Thermal expansion
5. CORRECT FLOW DIRECTION:
-Ifpossible,haveowagainstvalveclosing
direction to avoid or minimise water
hammer.
Valve
Mixproof
Valve
Mixproof
Divert
4. Installation

A
A
(mm)
DN25--40
DN50
DN65
DN80
DN100
420
450
490
510
600
(GB-IST-B925-0910) 6/35
The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice.
6. VALVE CONNECTIONS/UNIONS:
- Ensure tight connections between valve and piping.
-Remembergasketsandtcorrectly.
-Tightenunionsrmlyandcarefully.
7. WELDING VALVE BODY INTO PIPING:
- Remove inner valve parts.
- Weld body carefully into piping.
- Fit valve.
-Seettinginstructions.
B925 (with Giotto-Top®)
8. INSTALLING VALVE INTO PIPING:
-Ensuresufcientclearanceforvalvedisassembly.
Valve
Dimension
4. Installation

The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice. (GB-IST-B925-0910) 7/35
1. SUPPLYING AIR AND ELECTRICITY TO THE VALVE:
- Use authorised personnel to operate the valve.
- Ensure correct air pressure and quality (see page 34).
- Ensure correct electrical supply for Giotto-Top®(see Giotto-Top®instruction manual).
2. DISCONNECT SUPPLIES AFTER USE:
- Disconnect air supply.
- Disconnect electrical supply for Giotto-Top®.
3. MOVING VALVE PARTS:
-Neverstickngersintovalveports.
- Never touch the shaft of the valve whilst it is working.
4. USE THE VALVE EXCLUSIVELY FOR ITS INTENDED DESIGN USE.
- B925: Valve Mixproof
- B925B: Valve Mixproof
5. HOT VALVE/PIPING:
- Never touch hot valve or piping, if possible.
- Alternatively use protective gloves.
BURN RISK
Air
Air
Air
Air
Air
Air
Electrical Connections
Giotto - Top®
Air
Air
Air
Electrical Connections
Giotto - Top®
5. Operation
B925
DIVERT
B925B
DIVERT
B925 B925B

(GB-IST-B925-0910) 8/35
The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice.
5. Operation
6. PRE-USE CHECK VALVE BEFORE OPERATION:
- Supply air to the valve.
- Supply electricity to the valve (with Giotto top®).
- Open and close the valve several times.
- Check that the valve functions operate correctly and smoothly.
6. Troubleshooting
2. REPLACING WORN VALVE PARTS:
- See page 12 for spare parts ordering.
1. TROUBLESHOOTING VALVE:
Always study operation and maintenance
instructions carefully before troubleshooting.
Risk of external
or
internal corrosion
Electrical Connections
Giotto - Top®
Air
Air
Air
6. Troubleshooting
Risk of
seal
damage
External leakage
Internal leakage with closed valve,
caused by normal wear
External leakage
Internal leakage with closed valve
occuring earlier than normal wear
rate
Difcultyopeningandclosing
Worn out seal
Excesive pressure
Excesive temperature
Aggressiveuids
Too many controls active
Incorrect elastomer type of seal
Incorrectly positioning of the
actuator
Incorrect operation of actuator
Dirt in the actuator
Incorrect positioning of the valve
body
Replace with seals of a different
elostomer type
Modify operational conditions
Replace with seal of different
elastomer type
Fit the actuator correctly
Change from a normally open (NO)
to normally closed (NC) or
vice versa
Carry out actuator maintenance
Disassemble and reposition the
valve body
Replace seal
PROBLEM POSSIBLE CAUSE POSSIBLE REMEDY

The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice. (GB-IST-B925-0910) 9/35
7. Cleaning
1. CLEANING VALVE WITH CLEANING AGENTS:
- Use authorised personnel to clean the valve.
- Observe concentrations of cleaning agents.
- Follow instructions of cleaning agent suppliers.
- Always use protective goggles and gloves.
BURN RISK
2. HOT VALVE/PIPING:
- Never touch hot valve or piping, if possible.
- Alternatively use protective gloves.
3. HANDLING OF CLEANING AGENTS:
- Dose cleaning agents regularly to avoid excessive concentration.
- Always rinse carefully with clean water after cleaning.
- Check compatibility of valve matter.
Risk of
corrosion
stainless steel
Risk of
seal
damage
Example of suggested CIP
Step Temperature °C Cip product
First rinsing Atmosphere Water without chlorine or
chlorids
Washing 70° Soda (NaOH) at 1%
Intermediate washing Atmosphere Water without chlorine or
chlorids
Washing 70° Nitric acid (HNO3) at 0,5%
Final rinsing Atmosphere Water without chlorine or
chlorids
Recommended claning speed = 2 m/s

(GB-IST-B925-0910) 10/35
The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice.
8. General Maintenance
2. DISCONNECT SUPPLIES AFTER USE:
- Disconnect air supply.
- Disconnect electrical supply for Giotto-Top®
3. MOVING VALVE PARTS:
-Neverstickngersintovalveports.
- Never touch the shaft of the valve whilst it is working.
BURN RISK
Atmospheric
pressure
required!
4. PRESSURISED VALVE/PIPING:
Alwaysreleaseuidpressurefromvalveand
piping before disassembling the valve.
5. HOT VALVE/PIPING:
- Never touch hot valve or piping, if possible.
- Alternatively use protective gloves.
Electrical Connections
Giotto - Top®
Air
Air
Air
Air
Air
Air
1. SUPPLYING AIR AND ELECRICITY TO VALVE:
- Use authorised personnel to service the valve.
- Ensure correct air electrical supply for Giotto-Top®(see Giotto-Top®instruction manual).
- Ensure correct air pressure and quality (see page 34).
Electrical Connections
Giotto - Top®
Air
Air
Air

The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice. (GB-IST-B925-0910) 11/35
Wash and clean
thoroughly!
6. CLEANING OF DEPOSITS:
- Wash and clean all valve parts thoroughly before disassembly and assembly!
-Payattentiontopossibledepositsofcleaningagentsandotheraggressiveuids!
- Always use protective goggles and gloves, if necessary.
9. Planned Maintenance
Planned maintenance Valve gaskets Actuator gaskets
Preventive Replace after 12 months Replace after 24 months
In case of leakage Replace at the end of the
day Replace in case of leakage
Periodical
Check for correct ope-
ration and absence of
leakage
Check for correct operation and
absence of leakage
Record all actions taken Record all actions taken
8. General Maintenance
7. REPLACING WORN VALVE PARTS:
- Always use original spare parts.
- See page 12 for spare parts ordering.
- Dispose of worn parts according to current directives.

(GB-IST-B925-0910) 12/35
The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice.
10. Spare Parts Ordering
NOTE!
Pleasecopythispage,llitoutandfaxittobelowaddress.
À:
BARDIANIVALVOLESS.P.A.–UfcioRicambi
Fax: [phone]
From:
Valve type:
Valve type:
Shipping instructions:
Month/Year of purchase:
Quantity:
Description:
Position no.:
Quantity:
Description:
Position no.:
Quantity:
Description:
Position no.:
Quantity:
Description:
Position no.:

33
35
42
24
42
1
24
51
1
199
33
52
42
60
50
106
2
14
62
245
70
78
51
94
193
11
58
75
240
242
270
The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice. (GB-IST-B925-0910) 13/35
11. Disassembly of B925 - B925B
2.Removeairpressurefromthecentralairtting(24)
and remove upper body (42) lower body (1).
3.Supplyairtotheupperairtting(75).Unscrew
the lower shutter (51) sujetar the shaft (11) with
an allen wrench.
4. Remove the seal ring (94), the guide bushing (193)
and seal ring (78 not present in to B925B) and
(242 present in to B925B) from the lower shutter
(51).
6. Remove the clamp (199) and the plug (52) from the
body (1). Remove the clamp (33) between upper
(42) and lower (1) body.
5. Unloose the adjusting sleeve (58) using an hand span-
ner, and unscrew pin guide (245) and remove the seal
ring (270 present in to B925B) and then the upper
shutter (2). Remove the sealing ring disc (50) and the
seal rings (60 and 70) and the guide bushing (106).
Remove also the seal rings (14, 62) and (240 present
in to B925B) from the shutter (2).
Air Air
COUNTERHOLD
Air
1.Supplyairtothecentralairtting(24).Remo-
ve the clamp (33) from the upper body (42)
and the assembly (35).

108
52
42 64
69
126
A
101
85
18
A
31
13
66
77
12
11
9
18
31
13
66
18
85
11
(GB-IST-B925-0910) 14/35
The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice.
11. Disassembly of B925 - B925B
7. Remove the sealing ring (108) from the body
(42).
Remove the sealing ring (126 and 69) and the
guide bushing (64) from the plug (52).
COUNTERHOLD
9. Gradually reduce the press force, matching the stop-
per (18) until the complete unloaded of the secondary
spring (85).
This operation must be carried out with great
care by a specialised person.
12. Using a press with a plug specially made for the operation
(A) preload the upper piston (66). Unscrew the nut (77)
using a wrench specially made and mach the piston (66)
until the complete unloaded of the spring (31).
This operation must be carried out with great
care by a specialised person.
11. sujetar with an allen wrench the shaft (11) and
unscrew the spring block.Also remove the seal
ring (12).
8. Using a press with a plug specially made for the opera-
tion (A) preload the stopper (18). Unscrew the socket
screw (101) from the cylinder (9).
This operation must be carried out with great
care by a specialised person.
10. Remove the stopper (18), unthread the shaft (11)
together with piston block (66 and 13) and spring
(31). Also remove the secondary spring (85).

18
17
19
16
66
91
90
4
13
9
34
81
58
83
35
121
82
53
61
120
35
58
53
31
13
66
77
154
The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice. (GB-IST-B925-0910) 15/35
15. Remove the seal rings (91 and 90) from the
upper piston (66).
14. Remove the seal rings (16 and 19) and the guide
bushing (17) from the stopper (18).
16. Remove the seal rings (4) from the central piston
(13).
17. Unscrew the socket screw (34), disassemble the
part assembly (35), the lower piston (53), the
adjusting sleeve (58) from the cylinder (9).
18. Remove the seal ring (83) from the adjusting sleeve
(58), seal rings (82 and 61) from the lower piston (53)
and seal rings (81 and 121), the guide bushing (120)
from the part assembly (35).
13. Unthread the upper piston (66), the spring (31),
the nut (77) and gauge (154) [only DN25--40, 65]
from the central piston (13).
11. Disassembly of B925 - B925B

B925
(GB-IST-B925-0910) 16/35
The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice.
11. Disassembly of B925 - B925B

B925B
The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice. (GB-IST-B925-0910) 17/35
11. Disassembly of B925 - B925B

42
108
52
64
126
50
106
70
60
69
81
121
35
120
62
14
2
240
78
51
94
193
242
(GB-IST-B925-0910) 18/35
The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice.
12. Assembly of B925 - B925B
1. Heat up seal rings (14 and 62)* in water to approx
85°C to soften them, insert this seal rings in the
seat in the upper shutter (2), using a cylindrical
object to push this rings in the cross way. Also
insert the seal ring (240 present only into the
B925B)*.
3. Insert the seal rings (69 and 126)* and the
guide bushing (64) in the lower plug (52).
4. Insert the seal ring (108)* in the upper body
(42).
5. Insert the seal rings (60 and 70)* and the guide bushing
(106) in the sealing ring disc (50).
2. Insert the seal ring (94)* into the lower shutter (51)
ttingasdescribedinstep1.Alsoinserttheseal
ring (242 present into the B925B)* and (78 not
present into the B925B)* and the guide bushing
(193).
6. Insert the seal rings (121 and 81) and the guide
bushing (120) in the part assembling (35).
*Lubricate elastomers with a product suitable for food contact

53
82
61
4
13 66
90
91
18
17
19
16
58
83
35
53
58 9
34
35
58
53
The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice. (GB-IST-B925-0910) 19/35
12. Assembly of B925 - B925B
7. Insert the seal rings (61 and 82)
in the lower piston (53).
8. Insert the seal rings (4) in the
central piston (13).
12. Insert the lower piston (53), the adjusting
sleeve (58) into the part assembling (35).
10. Insert the seal rings (16 and 19) and the
guide bushing (17) in the stopper (18).
9. Insert the seal ring (90 and 91) in
the upper piston (66).
11. Insert the seal rings (83) in the adjusting
sleeve (58).
13. Fit the part assembling (35), the lower piston (53)
and the adjusting sleeve (58) in the cylinder (9)
using the socket screw (34). Orient the part as-
sembling so that the tab with BARDIANI symbol
was aligned with the air connections.

A
31
13
66
77
12
11
A
101
31
13
66
77
50
2
58
9
35
154
31
13
66
18
85
11
18
(GB-IST-B925-0910) 20/35
The Company BARDIANI VALVOLE reserves the right to modify its products at any time without prior notice.
12. Assembly of B925 - B925B
COUNTERHOLD
17. Insert the secondary spring (85) in to the
cylinder (9), introduce the shaft (11) comple-
te of the piston (66 and 13) and the spring
(31) in to the cylinder (9). Closed it with the
stopper (18).
14. Prepare the spring block putting gauge (154)
[only DN25--40, 65], the spring (31) and the
upper piston (66) and the nut (77) on the
central piston (13).
15. Using a press with a plug specially made for the operation
(A) preload the upper piston (66). Screw the nut (77)
using a wrench specially made and mach the piston (66)
until the complete unloaded of the spring (31).
This operation must be carried out with great
care by a specialised person.
16. Insert the seal ring (12) on the shaft (11). sujetar
with an allen wrench the shaft (11) and screw
the spring block on it.
18. Using a press with a plug specially made for the ope-
ration (A) preload the stopper (18). Screw the socket
screw (101) in the cylinder (9).
This operation must be carried out with great
care by a specialised person.
19. Introduce the sealing ring disc (50) in to the part
assembling (35) and screw the upper shutter
(2) in the adjustin sleeve (58) .