Plates

1. Caulked and Gasketed Recessed Cavity Plate
2. Non-Gasketed Recessed Plate
3. Plate and Frame
4. Membrane Plates
5. Back-up Insert Plates

Membrane Plate Systems

Membrane plates may be substituted for the standard polypropylene plates when rapid cycling of impermeable sludgers must be processed. The plate is similar in construction to a standard plate with the exception that a flexible cloth support is added. After the press recessed chambers are filled with solids and before the press is opened, air or water pressure is applied behind the diaphragm forcing them outward, exerting additional “squeeze” pressure on the accumulated filter cake. The high-pressure squeeze not only removes additional moisture but also shrinks the filter cake making it easier to remove from the filter chamber.

Filtration/Compaction Pressure

1. 100 psi = Standard Pressure
2. 225 psi = Considered high pressure used in POTW’S for excess biological
3. Floc, also for Oily waste and Membrane Presses.

Pressure Closure System

1. Pnuematic Hydraulic
2. Electric/Pnuematic Hydraulic
3. Electric Hydraulic
4. Pnuematic Hydraulic – Spring Return
5. Manual Hand Hydraulic Pump

Pumping Systems

1. 100 psi Air Diaphragm Pumps
2. 225 psi Air Diaphragm Pumps
3. 100 psi/225 psi Pump Skid with Interlock

Expansion

1. Built-In Expansion Pieces
2. Back-Up Insert Plate

Plate Spreaders (To assist the Operator)

Manual – Standard Quotation

Semi-Automatic Plate Spreader – An operator activated pneumatic spreader that enables one operator, unassisted, to clean the large presses. A pneumatic driven plate “dog” is inserted between the plates and a pneumatic ram uniformly forces the plates to the “open” position. The system is enclosed in a counsel that rides on stainless steel rods built on the press.

Full Automatic Plate Spreader – A fully automatic plate spreader is moved by electric motor drive, and is positioned by proximity switches. The plates are then automatically spread with pneumatic cylinders.

Manifolds (All HEI units have built-in unitized pneumatic compensators)

1. Manual valve
2. Manual valves with core air blow down – standard
3. Manual valves with reverse core blow down
4. Automatic valves (electric or pneumatic action)
5. Cake wash

Filter Cake Dispostion

1. Under Press – Self Dumping Hopper
2. 55 gallon direct discharge – external legs & chutes
3. Elevated Stand
   1. Roll-Off Container
   2. Large Hopper
4. Cake Conveyor Units
   1. Conveyor Units
   2. Conveyor Screws
5. Motorized Winch Drive (to pull Roll-Off Container)
6. Splash Curtain

Control Systems

1. Standard Pneumatic Control
2. Automatic Three-Stage Pump Control
3. Press Full Indication
4. Full Automatic Programmable Logic Control
   1. Automatic valves
   2. Automatic blow-down
   3. Automatic reverse core blow-down
   4. Automatic pump control
   5. Automatic drip trays
   6. Light curtain
   7. Automatic press full, sequenced blow-down and press open
   8. Automatic membrane squeeze
   9. Automatic pre-coat
   10. Automatic body feed

Drip Trays (leakage containment)

1. Manual drip trays
2. Automatic drip trays
3. Bombay door drip tray

Additional Safety Devices

1. Electronic light curtain – one or two sided
2. Deadman lock-out
3. Hydraulic clamp pressure/seed pump
4. Splash curtain
5. Drip tray interlock

Auxillary Systems

1. Automatic polymer make-up/dilute/age system
2. Diaphragm plate squeeze system
3. Filter cloth pre-coat system
4. Body feed systems
5. Acid cloth wash unit
6. Compacted sludge drying systems
7. Sludge conveyor systems
8. Roll-off container powered winch movement