Specifications:
The document outlines the specifications for the Roach model 196ZPA, a medium-duty zero pressure live roller accumulator. Key components include tread rollers, pressure rollers, belting, drive and end pulleys, return rollers, squaring rods, and bearings. The tread and pressure rollers are 1.9" in diameter and made of 16-gauge steel. The belting is 6" wide black PVC-120 COS. Drive pulleys are available in 4" or 8" diameters, both crowned and fully lagged. End pulleys are 4" in diameter and crowned. Return rollers are adjustable, and squaring rods are standard on units over 30'.

Procedures:
The conveyor is designed for quiet and safe accumulation of packages with zero back pressure, handling loads up to 125 lbs./ft. Pop-out rollers must be retained in the frame if the unit is elevated to 7'-0" or higher. The conveyor speed is constant at 60 FPM, and pneumatic actuation should not exceed 30 PSI. The unit includes a filter, regulator, and lubricator with 1/4" ports.

Norms and Recommendations:
Optional electrical controls are available, and the unit can be equipped with zone singulation for load accumulation or off-loading. Accumulation zones are available in various lengths and roller centers. The document recommends specifying the desired elevation for installation and provides options for auxiliary take-up, floor supports, ceiling hangers, and guard rails.

Optional Equipment:
Optional equipment includes galvanized rollers, various motor types, and electrical controls such as magnetic starters and push button stations. The document also provides a specification table for conveyor lengths and unit weights, with deductions for different roller centers.

Key Parameters:
- Maximum air line pressure: 30 PSI
- Motor drive: 1/3 HP, 230/460/3, 60 cycle
- Speed: 60 FPM constant
- Belt width: 6"
- Overall width between frames: 1 1/2"

Limitations:
The document notes that capacity changes with speed and provides specific weights for different configurations. It also specifies that units over 50'-0" in length require an 8" diameter drive pulley.