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SLF & SLFH Unhoused Spring Mounts

Pump with SPring Mount

Mason SLF & SLFH Unhoused Spring Mounts provide the greatest deflection – up to 2″ to ensure excellent isolation. Mason vibration isolation mounts are used to support equipment located on upper building levels where there are wide vibration sensitive spans. For outdoor applications where wind loads may affect lateral stability, see Mason SLR or SLRH restrained spring mounts.

Mason SLF one inch deflection spring mounts provide far greater vibration control than the lower deflection neoprene mounts. Each Powder coated steel spring is in series with neoprene, providing excellent isolation efficiency. The Mason SLFH’s spring serves to isolate a broad range of disturbing vibration frequencies, while the rubber is a high frequency or noise break. Start and stop as well as horizontal wind force will require the use of C, SLR or SSLFH Type mounts that have built-in horizontal limits.

Mason SLFH two inch deflection spring mounts are for use on equipment located on upper level wide building spans, where more than one inch of deflection is needed to cancel the effect of the building span’s deflection. Two inch deflection springs use the same holders as one inch springs.

Product Testing & Information


SLF – Unhoused Spring Mount

SLF Unhoused Spring Mount

SLFH – Unhoused Spring Mount

SLFH Unhoused Spring Mount
Height Saving Bracket

Height Saving Bracket –
Use when equipment cannot be raised to the Mason vibration isolation mount’s free & operating height.

INSTALLATION: Block up equipment to the Mason vibration isolation mount’s required free and operating height (see tables below), then make connections to the unit. Position mounts under unit. Take two turns on each adjustment bolt working around the unit until springs are compressed just enough to remove blocks. Do not “jack up” equipment significantly during spring adjustment. All springs have additional travel to solid equal to 50% of the rated deflection except SLFH-B2-450, which has 38% at rated capacity.

SLF 1″ Deflection Unhoused Spring Mounts
Type & SizeRated CapacityRated DeflectionMount ConstantSpring Color/StripeDimensions
AFree & Oper.
Height
SLF-X-1212 lbs1.25″10 lbs/inOrange2 ″3-3/4″
SLF-X-2323 lbs1.30″18 lbs/inBrown
SLF-X-3333 lbs1.10″30 lbs/inRed
SLF-X-5454 lbs1.20″45 lbs/inWhite
SLF-X-7676 lbs1.02″73 lbs/inBlack
SLF-X-113113 lbs1.00″113 lbs/inYellow
SLF-X-130130 lbs1.00″130 lbs/inPurple
SLF-X-175175 lbs1.00″175 lbs/inSilver
SLF-X-210210 lbs1.00″210 lbs/inBlue
3/4″ Minimum Deflection
SLFH 1″ Unhoused Spring Mounts
Type & SizeRated CapacityRated DeflectionMount ConstantSpring Color/StripeDimensions
CEGFree & Oper. Height
SLFH-A-4545 lbs1.60″28 lbs/inBlue2-1/4″3″3-5/8″4-1/4″
SLFH-A-7575 lbs1.50″50 lbs/inOrange
SLFH-A-125125 lbs1.33″94 lbs/inBrown
SLFH-A-200200 lbs1.15″174 lbs/inBlack
SLFH-A-310310 lbs1.00″310 lbs/inYellow
SLFH-A-400400 lbs1.00″400 lbs/inGreen
SLFH-A-510510 lbs1.00″510 lbs/inRed2-1/4″3″3-5/8″4-5/8″
SLFH-A-625625 lbs1.00″625 lbs/inWhite
1-1/2″ Minimum Deflection
SLFH 2″ Deflection Unhoused Spring Mounts
Type & SizeRated CapacityRated DeflectionMount ConstantSpring Color/StripeDimensions
CEGFree & Oper. Height
SLFH-B-2020 lbs2.40″8 lbs/inTan2-3/4″4-1/4″5-1/8″6″
SLFH-B-2626 lbs2.18″12 lbs/inWhite/Blue
SLFH-B-3535 lbs2.20″16 lbs/inPurple
SLFH-B-5050 lbs2.20″24 lbs/inWhite/Red
SLFH-B-6565 lbs2.10″31 lbs/inBrown
SLFH-B-8585 lbs2.10″40 lbs/inWhite/Black
SLFH-B-115115 lbs2.00″57 lbs/inSilver
SLFH-B-150150 lbs2.00″75 lbs/inOrange
SLFH-B2-210210 lbs2.12″99 lbs/inSilver2-3/4″4-1/8″5-1/4″6-3/4″
SLFH-B2-290290 lbs2.00″144 lbs/inBlue
SLFH-B2-450450 lbs2.00″224 lbs/inTan
1-1/2″ Minimum Deflection