Emerson Fisher T205VB Series Instruction Manual Download Page 3

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ADJUSTING SCREW

CONTROL SPRING

VENT

CONTROL LINE

CONNECTION

PUSHER POST

LEVER

STEM

DIAPHRAGM

VALVE PLUG DISK

ORIFICE

THROAT SEAL

STEM SEAL O-RING

ADJUSTING SCREW

VACUUM

PUMP

CONTROL

SPRING

VENT

PIPE PLUG

PUSHER POST

LEVER

STEM

DIAPHRAGM

VACUUM

BEING

LIMITED

VALVE PLUG DISK

ORIFICE

ADJUSTING SCREW

CONTROL SPRING

VENT

CONTROL LINE

CONNECTION

PUSHER POST

LEVER

STEM

DIAPHRAGM

VALVE PLUG DISK

ORIFICE

THROAT SEAL

STEM SEAL O-RING

ADJUSTING SCREW

CONTROL SPRING

VENT

CONTROL LINE

CONNECTION

PUSHER POST

LEVER

STEM

DIAPHRAGM

VALVE PLUG DISK

ORIFICE

THROAT SEAL

STEM SEAL O-RING

T205VB Series

Figure 2.

T205VB Series Operational Schematic

TYPE T205VBM WITH EXTERNAL PRESSURE REGISTRATION

POSITIVE PRESSURE, ATMOSPHERE, OR A

LESSER VACUUM THAN THE ONE BEING LIMITED

VENT

CONTROL LINE

CONNECTION

PUSHER POST

LEVER

STEM SEAL O-RING

ORIFICE

VALVE PLUG DISK

THROAT SEAL

STEM

DIAPHRAGM

TYPE T205VB WITH INTERNAL PRESSURE REGISTRATION

ADJUSTING SCREW

CONTROL SPRING

CONTROL

SPRING

INLET PRESSURE
CONTROL PRESSURE (OUTLET PRESSURE)
ATMOSPHERIC PRESSURE

PIPE PLUG

VACUUM

BEING

LIMITED

VACUUM

PUMP

POSITIVE PRESSURE, ATMOSPHERE, OR A

LESSER VACUUM THAN THE ONE BEING LIMITED

Summary of Contents for Fisher T205VB Series

Page 1: ...akers Instructions and parts lists for other equipment used with these breakers are found in separate manuals Product Description The T205VB Series vacuum breakers Figure 1 are used for precise control of small capacity low pressure service applications where an increase in vacuum must be limited These direct operated vacuum breakers are available in 3 4 and 1 in DN 20 and 25 body sizes and have 1...

Page 2: ... 7 lbs 8 5 kg 1 The pressure temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded WARNING Failure to follow these instructions or to properly install and maintain this equipment could result in an explosion fire and or chemical contamination causing property damage and personal injury or death Fisher vacuum breakers must be installed o...

Page 3: ...T SEAL STEM SEAL O RING 3 T205VB Series Figure 2 T205VB Series Operational Schematic TYPE T205VBM WITH EXTERNAL PRESSURE REGISTRATION POSITIVE PRESSURE ATMOSPHERE OR A LESSER VACUUM THAN THE ONE BEING LIMITED VENT VENT CONTROL LINE CONNECTION PUSHER POST PUSHER POST LEVER LEVER STEM SEAL O RING ORIFICE ORIFICE VALVE PLUG DISK VALVE PLUG DISK THROAT SEAL STEM STEM DIAPHRAGM DIAPHRAGM TYPE T205VB WI...

Page 4: ...psi 5 2 bar 100 psi 6 9 bar 125 psi 8 6 bar In mm psig bar psig bar psig bar psig bar psig bar psig bar 0 to 4 in w c 0 to 10 mbar 0N039427222 Unpainted 1 4 6 4 4 in w c 10 mbar 4 in w c 10 mbar 3 5 in w c 8 7 mbar 3 in w c 7 5 mbar 2 5 in w c 6 2 mbar 2 in w c 5 mbar 1 2 13 4 in w c 10 mbar 3 in w c 7 5 1 5 in w c 3 7 mbar 0 to 1 0 psig 0 to 69 mbar 0N086127022 Unpainted 1 4 6 4 1 0 07 1 0 07 1 0...

Page 5: ...s required during inspection or maintenance install a three way bypass valve around the equipment 3 To keep the spring case vent key 26 Figure 3 or 4 from being plugged or the spring case from collecting moisture corrosive chemicals or other foreign material point the vent down or otherwise protect it The diaphragm casing key 4 may be rotated in order to obtain desired positioning 4 To remotely ve...

Page 6: ...osion of accumulated gas do not attempt any maintenance or disassembly without first isolating the vacuum breaker from system pressure and relieving all internal pressure from the equipment Vacuum breakers that have been disassembled for repair must be tested for proper operation before being returned to service Only parts manufactured by Emerson should be used for repairing Fisher vacuum breaker ...

Page 7: ... If the only further maintenance is to replace the diaphragm parts skip to step 8 4 To replace the lever assembly key 16 remove the machine screws key 17 5 To replace the valve stem key 14 also perform Body Area maintenance procedure steps 1 through 4 and pull the valve stem out of the guide insert key 18 6 Install the valve stem key 14 into the guide insert key 18 and perform Body Area maintenanc...

Page 8: ...ragm parts onto the lever assembly key 16 10 Install the spring case assembly key 3 and control spring key 6 on the diaphragm casing key 4 so that the vent assembly key 26 is correctly oriented and secure them with the spring case cap screws key 24 and hex nuts key 23 to finger tightness only 11 Install the upper spring seat key 19 and adjusting nut key 20 Turn adjusting nut clockwise until there ...

Page 9: ...sert Stainless steel 27B4028X022 19 Upper Spring Seat Steel 1A201824092 20 Adjusting Nut Brass 17B9740X012 21 Hex Nut Steel 1A345724122 22 Closing Cap Zinc standard 1B541644012 Steel 1K797024092 23 Hex Nut 8 required For WCC Carbon steel or Gray Cast iron casing Steel 1A345724122 For Stainless steel casing Stainless steel 1A3457K0012 24 Cap Screw 8 required For WCC Carbon steel or Gray Cast iron c...

Page 10: ...5 8 16 17 12 11 49 15 13 36 25 19 51 20 6 21 14 18 5 L1 L1 L2 L2 1 Lubricants must be selected such that they meet the temperature requirements 10 T205VB Series APPLY LUBRICANT 1 L1 SILICONE GREASE L2 ANTI SEIZE LUBRICANT Figure 3 Type T205VB Assembly ...

Page 11: ...7 36 25 19 51 20 6 21 14 18 31 34 5 L2 L2 2 1 48 47 3 4 46 23 24 26 22 1 Lubricants must be selected such that they meet the temperature requirements 11 T205VB Series Figure 4 Type T205VBM Assembly APPLY LUBRICANT 1 L1 SILICONE GREASE L2 ANTI SEIZE LUBRICANT ...

Page 12: ... are presented for informational purposes only and while every effort has been made to ensure their accuracy they are not to be construed as warranties or guarantees express or implied regarding the products or services described herein or their use or applicability All sales are governed by our terms and conditions which are available upon request We reserve the right to modify or improve the des...

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