SUMMARY OF MODIFICATIONS

 

Modification

Mark 3, 4, 4A

Mark 5

Mark 6

Commonality of bearings between Rinse Section Pressure Rolls and long Drying Drum Rolls, by replacing roller levers

X

X

X

Commonality of bearings and other parts between Dry Feed Hopper, J-Box Feed and Accumulator Drive by replacing DFH and AD (NEW! DFH replacement for Mark 4/4A is now a bolt-on assembly! While cutting of the J-Box is still required, no field welding is required.)

X

X

X

Replace 30-horsepower, 2-speed start, integral motor English pump with 20-HP, single-speed start American pump with separate, coupled motor

X

(Note 1)

X

(Note 1)

X

(Note 1)

Replace Wash Section Spray Manifolds with 20 total spray jets, 10 per manifold (requires welding of stainless steel pipe)

X

(Note 2)

(Note 3)

(Note 3)

Modify Rinse Section for added strength and easier servicing of rollers and bearings (requires welding of stainless steel to add gussets to Mk. 4 and 4A machines)

X

(Note 4)

(Note 4)

Replace Steam Drums with American-made 78" ASME-rated drums, rated for 100 PSI service, allowing an extra pass over the drums, increasing drying capacity (requires frame modification for Mk. 4/4A)

X

(Note 5)

X

(Note 6)

X

(Note 6)

Steam equipment replaced with U.S.-made equipment

X

X

X

Replace ramp-style clean accumulator with "straight through" Stacker Drive Assembly and "lay down" stainless steel trough, with larger capacity, lower towel tension, and lower potential for injury

X

X

(Note 7)

X

(Note 7)

Most electrical equipment made by Allen-Bradley, although other manufacturers may be substituted at customer’s option

X

X

X

Variable-Frequency Drive to allow gentler starts, reducing tension and shock on the towel, as well as slower "training speeds".

X

X

X

Remotely-variable Steam Drum pressure regulator, for processing both cotton and polyester towels

X

X

X

Midwestern Industries shaker-screen filter to remove more lint from wash water and effluent, keeping the jets and pump clean (requires frame modification; not generally considered "field modifiable")

X

X

(Note 8)

 

Notes:

  1. 16-stage Grunfos pump used on most Mk. 6 machines. Improved filtration required for round-tank machines
  2. Improved filtration required for round-tank machines
  3. Mk. 5 machines use two manifolds with 11 jets per manifold. Mk. 6 machines use four manifolds with 6 jets per manifold
  4. Some Mk. 5 and all Mk. 6 machines are already slotted for easy removal of rollers, but do not have reinforcement bars to prevent flexing and cracking of side walls. These do not require welding to modify.
  5. Mk. 3 and some 4 machines use 72", 60 PSI, non-ASME-rated drums. Later Mk. 4 and all Mk. 4A machines raised the pressure rating to 70 PSI, but were still not ASME rated.
  6. Mk. 5 and 6 use 78" drums with 80 PSI ratings, but only those machines that were ordered with U.S.-made drums have ASME ratings.
  7. Mk. 5 and 6 machines have a fiberglass trough and several variations on the "stacker drive assembly" which have proven troublesome over the years.
  8. Mk. 6 machines use a Sweco shaker-screen filter.