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Flowsafe F84L Series, Installation & Maintenance Manual, Page: 16 / 18

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Flowsafe F84L Series Installation & Maintenance Manual Download Page 16

INSTALLATION, OPERATION, &  

MAINTENANCE MANUAL   

TITLE: 

F84L Series Liquid Relief Valve 

Rev.  J 

Page 16 of 18 

F84L SERIES VALVE 

ASSEMBLY ILLUSTRATION 

F84L-3 / -4 / -8, “X” Body (High Pressure XL, Bolted Bonnet)

See Page 18 for typical lift lever assembly 

SPRING

BONNET 

SPINDLE

SEAT 

(PLASTIC) 

LOCKWIRE / 
LEAD SEAL 

SPRING WASHER

PA SCREW CAP

PRESSURE 
ADJUSTMENT 
(PA) SCREW

PA SCREW 
LOCK NUT

BUSHING 

REAR SEAL

BOLT

SPINDLE / SEAT DETAIL 

F84L-8

RETAINER

SEAT

 (PLASTIC)

RETAINER SCREW 

(-3 / -4 SHOWN)

LOCKING 
THREAD INSERT

SPINDLE

LOCKING 

THREAD INSERT

DRAG SEAL

(ELASTOMER)

BUSHING SEAL

DRAG SEAL

(ELASTOMER)

SPINDLE SEAL

(ELASTOMER)

BONNET BOLT

NUT / 

LOCKWASHER

BODY

SPINDLE SEAL

(ELASTOMER)

Summary of Contents for F84L Series

Page 1: ...RELIEF VALVE PLASTIC SEATED 2 Orifice WITH THREADED BONNET 3 4 8 G J Orifices WITH BOLTED BONNET INSTALLATION OPERATION MAINTENANCE MANUAL Revision J Date of Issue Oct 6 2021 Approved by jwo GG Engin...

Page 2: ...ly 7 3 2 Reassembly 7 4 0 Valve Testing and Adjustment 4 1 Test Equipment 8 4 2 Setting Adjustment Tolerances 8 4 3 Set Pressure Adjustment 9 4 4 Seat Tightness 9 4 5 Lift Lever Operation 10 5 0 Acces...

Page 3: ...ing this allowance is not recommended Cycling the valve at least once a year is considered to be good practice to verify operation and to confirm that parts are not seized 3 When a new valve leaves FL...

Page 4: ...als Orifice sizes are available in 2 3 4 8 G and J with set pressures from 30 to 24 277 psig depending on the orifice size Blowdown is nonadjustable designed to be a maximum of 20 for the 3 4 8 G and...

Page 5: ...sible to the pressure source to minimize pressure losses between the system and the valve This should be in accordance with accepted piping practices as set forth in the API 520 Part II which recommen...

Page 6: ...opened before pressurizing the system This block valve should be locked open during normal system operation Use only the wrench flats on the valve inlet bushing taking care not to make any wrench mark...

Page 7: ...net including attached bonnet base if an older F84L 4 or 8 large body where these two pieces are joined by a retaining ring b F84L 2 Two piece Micro body Unscrew the bonnet from the body Remove spring...

Page 8: ...ly into the body and tighten using the wrench flats 9 Assemble the spring washer s spring and lifting rod subassembly if applicable into the bonnet 10 a For bolted bonnet valve sizes assemble the bonn...

Page 9: ...mbler for the correct parts 1 Remove the PA screw cap if installed loosen the PA screw lock nut and screw the PA screw in clockwise most of the way 2 Increase the inlet pressure to 1 075 1 0 93 of the...

Page 10: ...o be verified 1 With inlet pressure as stated in the above CAUTION rotate the lift lever handle clockwise or counterclockwise until it meets resistance 2 Continue rotating the handle slowly until ther...

Page 11: ...availability of other materials Bushing seal and rear seal are Teflon F84L 2 SGK Contents See page 14 Qty Description 1 Seat 1 Bushing Seal 2 Spindle Seal F84L 3 4 8 G J SGK Contents See pages 15 thro...

Page 12: ...s than 80 85 of set pressures 500 psig for the F84L 2 HP 300 psig for the F84L 2 LP or 100 psig for bolted bonnet sizes The valve leaks through the atmospheric vent hole in bonnet Worn damaged spindle...

Page 13: ...rease inlet pressure Confirm pressure gage is calibrated Isolation valve is closed Open isolation block valve The valve chatters or rapid cycles The valve is oversized for the application Install smal...

Page 14: ...E BUSHING BUSHING SEAL SPINDLE SEALS ELASTOMER SPINDLE SEAT DETAIL F84L 2 LP Retainer seat SPINDLE SEALS ELASTOMER SEAT PLASTIC LOCKING THREAD INSERT RETAINER SCREW PRESSURE ADJUSTMENT PA SCREW SPRING...

Page 15: ...r assembly SEAT PLASTIC PRESSURE ADJUSTMENT PA SCREW SPRING BONNET SPINDLE BUSHING LOCKWIRE LEAD SEAL SPRING WASHER REAR SEAL PA SCREW CAP PA SCREW LOCK NUT RETAINER SCREW 3 4 SHOWN BOLT DRAG SEAL ELA...

Page 16: ...ver assembly SPRING BONNET SPINDLE SEAT PLASTIC LOCKWIRE LEAD SEAL SPRING WASHER PA SCREW CAP PRESSURE ADJUSTMENT PA SCREW PA SCREW LOCK NUT BUSHING REAR SEAL BOLT SPINDLE SEAT DETAIL F84L 8 RETAINER...

Page 17: ...Bonnet See Page 18 for typical lift lever assembly BUSHING REAR SEAL BOLT LOCKING THREAD INSERT DRAG SEAL ELASTOMER BUSHING SEAL BONNET BOLT LOCKWASHER NUT LOCKWASHER BODY SPINDLE SEAL ELASTOMER LOWER...

Page 18: ...HER BUSHING RETAINER SCREW SPINDLE LOCKWIRE LEAD SEAL REAR SEAL BOLT LOCKING THREAD INSERT BUSHING SEAL NUT LOCKWASHER BONNET BOLT BONNET RETAINER SEAT PLASTIC PIPE PLUG HOUSING LIFT NUT LIFTING ROD P...

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