9
Maintenance
Required tools for maintenance
▪ a vise to fasten the regulator
▪ pincers to take out the O-rings
▪ a pair of tongs for a retaining ring 8 mm
▪ a torque wrench
▪ a torque wrench hexagon head key 6 (BD10)
▪ a torque wrench hexagon head key 8
▪ a torque wrench “open end insert tool”, 17 mm (BD(H)15)
▪ a torque wrench “open end insert tool”, 32 mm (BD(H)10)
▪ a torque wrench “open end insert tool”, 38 mm (-DP only)
▪ a torque wrench “open end insert tool”, 44 mm (BD(H)15)
▪ an open end wrench, 6 mm (BD10)
▪ an open end wrench, 15 mm (-DP only)
▪ media and temperature compatible lubricant for reassembling threaded parts
▪ media and temperature compatible lubricant for O-rings
▪ Snoop® liquid leak detector
Disassembly
▪ Loosen the hexagon socket head screws and remove the dome, dome plate, diaphragm, body
plate, and valve assembly.
▪ Loosen the retaining screw to remove the valve assembly.
▪ Loosen the bolt or nut from the diaphragm- and dome plate to remove the diaphragm.
▪ Loosen the bodyplug and remove the body plug and seat.
Inspection of disassembled parts
▪ Check all parts for abnormal wear. Replace parts in case of doubt.
Points of attention before assembly
▪ All parts must be clean and undamaged before starting assembly.
▪ Swagelok recommends replacing all O-rings and the diaphragm before assembly.
▪ All threaded parts must be lubricated a little before assembly, this to avoid galling of threads.
▪ All O-rings need to be lubricated a little to improve the lifetime of the O-ring and the performance
of the regulator.
