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Brand: Mason Industries
Mason Super W Molded Rubber Vibration Isolation Pad
Description
Molded rubber pad for noise breaks under pumps, chillers and HVAC equipment
The Mason Super W pad is a ribbed (waffle) molded vibration pad used under machines that need “some” isolation or a noise break, or where a resilient friction pad removes the need to bolt equipment down. The standard full sheet measures 18 in. x 18 in. x 3/4 in. (450 x 450 x 20 mm) and consists of 81 modules of 2 in. (50 mm). The modules are joined by a thin web that is easily cut, so installers can make pads of any whole number of squares such as 2 x 2 in., 2 x 4 in., 4 x 4 in. or 6 x 8 in.
Mason describes pads as suited to reducing noise, high-frequency vibration and impact from machines such as chillers, compressors, HVAC units, vent sets, pumps, motor generators, transformers, diesel generators, punch presses, lathes, saws, power presses and drill presses. They are an economical choice in basements and other non-critical areas, and are not a substitute for spring isolators where low frequencies must be controlled.
Technical specifications
| Parameter | Specification |
|---|---|
| Product family sizes | Mini Super W: 2 x 2 x 3/8 in. (50 x 50 x 10 mm); Super W: 2 x 2 x 3/4 in. (50 x 50 x 20 mm); 3×3 Super W: 3 x 3 x 3/4 in. (75 x 75 x 20 mm); Maxi Super W: 4 x 4 x 1 in. (100 x 100 x 25 mm) |
| Full sheet | 2×2 full sheet 18 x 18 x 3/4 in. (450 x 450 x 20 mm), 81 modules of 2 in. (50 mm) |
| Compounds | Natural rubber (maximum resilience and isolation, with anti-oxidants and anti-ozonants); standard neoprene (longer life, moderate oil resistance); bridge-bearing neoprene (maximum life, excellent oil resistance) |
| Stacking | Pads may be stacked with 16 gauge (1.6 mm) shims between layers for increased deflection |
| Load rating basis | Load per square at 15 % deflection; pads should be used in full squares |
| Bulletin reference | SW-16-3 |
| Durometer | Mini 2x2x3/8 in. (lbs / kg per square) | 2x2x3/4 in. (lbs / kg per square) | 3x3x3/4 in. (lbs / kg per square) | Maxi 4x4x1 in. (lbs / kg per square) |
|---|---|---|---|---|
| 30 | 80 / 35 | 80 / 35 | 180 / 81 | 320 / 145 |
| 40 | 120 / 53 | 120 / 53 | 270 / 122 | 480 / 217 |
| 50 | 180 / 80 | 180 / 80 | 420 / 190 | 750 / 340 |
| 60 | 240 / 105 | 240 / 105 | 540 / 244 | 960 / 435 |
| 70 | 360 / 158 | 360 / 158 | 810 / 367 | 1440 / 653 |
Mason notes that the Maxi 4 x 4 x 1 in. values are estimates prior to tooling and testing.
Sizing a pad
Divide the total load by the capacity per square at the chosen durometer and round up to the next whole number of squares. Mason gives an example: a 650 lb load on 40 durometer 2 x 2 in. squares rated at 120 lb gives 5.42, so six squares are used, arranged as 2 x 3 modules (4 x 6 in.) or 1 x 6 modules (2 x 12 in.). Using additional squares gives more conservative loading. Distribute the squares evenly under the equipment base so each carries a similar share.
What to confirm before ordering
Confirm the load per support point, the compound (natural rubber, neoprene or bridge-bearing neoprene), the durometer and the pad size. For equipment that needs a controlled deflection, consider a spring or neoprene mount such as the Mason ND double deflection neoprene mount. Other products are listed under Vibration Isolation.
Documents and quotation
The attached Mason Super W pads bulletin (SW-16-3) contains the sizes, compounds and load tables. State the load per mount, compound and quantity of pads or sheets for a quotation.
Datasheets & Documents
- Datasheet Mason Industries Super W Pads bulletin SW-16-3 (manufacturer) Download
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About brand
Mechanical consultants write Mason Industries type letters straight into their vibration isolation schedules. The company, founded in 1958 and based in Hauppauge, USA, makes vibration isolation and seismic control products. Seven Star LLC lists the Mason SLFH free-standing spring mount with bolt-down baseplate and supplies Mason isolators for building services plant in Oman on inquiry.
Mason SLFH spring mounts
The SLFH is an unhoused spring mount: the spring is free-standing and laterally stable without a housing. A neoprene cup or a 6 mm neoprene acoustical friction pad sits between the baseplate and the supporting structure, and the leveling bolt is fixed rigidly to the equipment. Mason builds single-spring and multiple-spring versions with 1 inch and 2 inch rated deflection, and higher deflection series.
Ordering Mason isolators: what we need
Send the full type and size designation from the schedule, the load at each support point, the required static deflection, the equipment type and speed, and the fixing details for the baseplate. Where GCC project specifications ask for submittal data, we provide the manufacturer sheet showing spring diameter, deflection, compressed height and solid height.
Related products
Frequently Asked Questions
What is the standard Super W sheet size?
18 x 18 x 3/4 in. (450 x 450 x 20 mm), made of 81 modules of 2 in. (50 mm).
What compounds are available?
Natural rubber, standard neoprene and bridge-bearing neoprene.
What load can a 2 x 2 x 3/4 in. square carry?
At 15 % deflection, 120 lb (53 kg) per square in 40 durometer and 360 lb (158 kg) in 70 durometer.
Can the pads be stacked?
Yes, with 16 gauge (1.6 mm) shims between layers for increased deflection.
Which equipment is Super W pad used under?
Chillers, compressors, HVAC units, pumps, motor generators, transformers and diesel generators, among others.
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