TOZEN PTM-C series spring vibration isolators are designed and constructed for high deflection, with laterally stable spring elements and assembled into telescoping cast iron housing. Each cast iron housing is equipped with an 8 mm thick, ribbed, noise absorbing pad that is bonded to the bottom. Each isolator has an internal or external adjusting/leveling bolt as a part of the top assembly. The ribbed, noise absorbing pad has an integrated resilient washer that prevents the transmission of noise and vibration from the contact of the bolt and mounting base plate to the structure. Holes or slots are provided in all of the isolators for bolting the isolator to the structure. Model PTM-C series spring isolators are available in standard deflection of 25 and 50 mm with load capacity from 200 Kgs to 1,400 Kgs (440 to 3080 lbs). Tozen Model PTM-C spring isolators are typically used to isolate vibration produced by mechanical, industrial, or process machinery, where more damping is required and less motion can be tolerated than with free standing spring isolators.


TOZEN Model PTM-C spring isolators are used to isolate high and low frequency vibration generated by floor mounted mechanical equipment located in non-critical and semi-critical areas.

Model PTM-C spring isolators are typically used to isolate the vibration produced by light weight mechanical equipment having the lowest operating speed of 1,200 rpm, located on grade supported slabs, or short structural floor spans, or when the isolator to equipment connection is such that a leveling bolt can be extended above the mount and act as a leveling and attachment bolt for the supporting equipment.


The vibration isolators shall be constructed with cast iron housed steel spring elements, a load cap and rubber sponge snubbers. The snubbers shall be designed to stabilize the isolator and prevent metal on metal contact within the top or bottom of the housed section. The top loading plate shall be constructed with a leveling bolt and lock nut.

The housingユs bottom shall be bonded to an 8 mm thick, ribbed, rubber pad and shall be slotted or drilled to allow for the bolting of the isolator to the supporting structure.

Outside diameter of the spring elements shall be greater than 80% of the compressed height of the spring element at the rated load. All spring elements shall be designed to provide a minimum 50% overload capacity.

Spring shall be selected to provide operating static deflections shown on the Vibration Isolation Schedule or as indicated on the project specifications. Springs shall be color coded or otherwise identified to indicate load capacity.

Vibration isolators shall be Model PTM-C as manufactured by Tozen Sangyo Co.,Ltd.

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