Xylem Bell & Gossett Hoffman Speciality Series Engineering Data Manual page 34

Two pipe–
steam trap installations
RETURN RISER
HORIZONTAL BRANCH
PIPES
45° ELBOWS
Connections for upfeed risers
BRANCH
Method of reducing size of main
Two pipe steam systems
convector connections
TRAP
SUPPLY
PITCH DOWN
VALVE
OR UNION
SUPPLY
PITCH DOWN
VALVE
OR UNION
SUPPLY
VALVE
OR UNION
PITCH DOWN
SUPPLY
VALVE PITCH DOWN
OR UNION
SUPPLY RISER
TRAP
DRY RETURN MAIN
Dripping end of supply main into dry return
SUPPLY MAIN
ECCENTRIC REDUCER
Exposed pipe coils–
two pipe steam
Distance from
center of
radiator tapping
to face of sill
must be given
Straight
extended stem
on supply valve
VERTICAL
TRAP
ANGLE
TRAP
ANGLE
TRAP
SWIVEL
TRAP
SUPPLY MAIN
MINIMUM COOLING LEG 5'0" LONG
SAME SIZE AS TRAP
DRY RETURN
DROP RISER OR
END OF MAIN
MINIMUM COOLING LEG 5'0" LONG
SAME SIZE AS TRAP
DRY RETURN
Dripping drop riser or end of main
into dry return
DIRT POCKET
Connections to header coils
of not over 8 pipes
GATE VALVE
DIRT POCKET
TRAP
Connections to header coils
having more than 8 pipes
TRAP
TRAP
TRAP
DIRT
POCKET
35