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11.5EFESI - SS Housed Spring Isolator

Our Stainless Steel Enclosed Spring Isolators are engineered to deliver high-performance vibration isolation in environments where durability, corrosion resistance, and clean aesthetics are essential. These isolators are ideal for mechanical equipment mounted on structural steel, concrete pads, or roof curbs where space constraints, weather exposure, or visible equipment areas require a premium solution. Each unit combines a precision-wound steel spring with a fully enclosed stainless steel housing that protects internal components from debris, corrosion, and mechanical damage. The design minimizes transmitted vibration and structure-borne noise, ensuring quieter and more reliable operation of building systems.

Features:
Fully enclosed 304 stainless steel housing for maximum corrosion resistance and long-term durability
Color-coded steel springs rated for 25 mm (1") to 50 mm (2") deflecon, depending on mode
An-skid neoprene pad base integrated to prevent shifting and absorb high-frequency noise
Built-in vercal limit stop prevents spring over-compression and provides added stability during startup or wind loading
Top-mounted adjustment bolt allows for easy leveling during equipment installaon
Suitable for both floor-mounted and roof-mounted mechanical systems
Supplied preassembled and factory-calibrated to rated load range
Please contact us for larger volume orders as further discounts may apply.
ModelRated Load (lbs)Deflection at Rated Load (in)Spring Rate (lbs/in)Spring ColourShipping Weight (lbs)PriceQuantityTotal
EFESI 25/3066166Yellow      Inquire
EFESI 25/601321132Green      Inquire
EFESI 25/1002201220Blue      Inquire
EFESI 25/1603521352White      Inquire
EFESI 25/2505501550Red      Inquire
EFESI 25/2004401440Red      Inquire
EFESI 25/3006601660Purple      Inquire
EFESI 25/4008801880Grey      Inquire
EFESI 25/500110011100Orange      Inquire
EFESI 25/600132011320Brown      Inquire
EFESI 25/700154011540Orange      Inquire
EFESI 25/800176011760Black      Inquire
2'' DEFLECTION
EFESI 50/1002202220Yellow      Inquire
EFESI 50/2004402440Green      Inquire
EFESI 50/3006602660Blue      Inquire
EFESI 50/4008802880White      Inquire
EFESI 50/500110021100Black      Inquire
Note: When product price is not shown, please call our office for technical consultation prior to place an order

Installation Guidelines

Place isolators under factory-specified support points 

Adjust the top bolt to level the equipment after installation

Do not remove the enclosure or tamper with the internal spring assembly

Ensure isolators are mounted on a stable, level surface

Optional bolt holes provided for anchoring to curbs, frames, or pads

 

Typical Applications 

 

Rootop air handling units (AHUs) 

Packaged rooftop units (RTUs) 

Exhaust and supply fans 

Chillers, compressors, and pumps

Electrical generators and mechanical skids

Isolaon of vibrang equipment on steel or concrete decks

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