Mity Spring

Description – Compression Spring

Compression Springs – Mity-Spring are assembled from components of Type 302 and 304 Stainless Steel. They are used with strapping to accommodate expansion and contraction of large diameter insulated and jacketed piping, tanks, vessels, and equipment. Standard Compression Springs provide 80 lbs. /inch of compression, and can be used with strapping widths up to 3/4″. When excessively high winds are a factor, or compression exceeds 80 lbs. /inch, Super Compression Springs with 300 lbs. /inch of compression and mounting plates for 1-1/4″ strapping widths are available.



3/4″ x 0.5mm Stainless Steel Strapping is slipped through and back over the slots on one end of the flat bottom of the spring. Strapping is secured with a 3/4″ closed seal. Strapping is extended around the object, or to the next spring, and the routine is repeated until the entire circumference has been encircled. (Secure the Super Compression Springs with 1-1/4″ x 0.5mm strapping, and 1-1/4″ Seals.)


To accommodate expected expansion of the object, the number of Compression Springs to be installed is based on a maximum compression of 1-1/2″ per spring. Install one Compression Springs for every 25′ of strapping. When tensioning the strapping, compress each spring unit a total of 1/2″ (1/4″ for each half of the spring unit). Extreme care should be taken to assure that spring compression and strapping stresses are evenly distributed around the object.