Which close mounting is more efficient Regular arm or Parallel arm

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The 4040 Rw/PA can be mounted 3 different ways. The 4040-18 drop plate is used for the regular pull side mount. The 4040-18TJ drop plate is used for the top jamb push side mount. The 4040-18P...
This can only be done with universal, non-handed closers:  1250, 1260, 1450, 1460, 4030, 4040XP, and 4050.You would need an xxxx-62PA shoe to adapt from regular arm to parallel arm mount&...
When placing an order for a 4041/4040XP Rw/PA with hold open, it would be ordered as a 4041 /4040XP Hw/PA. For an existing Rw/PA requiring the addition of a hold open function, a hold open arm woul...
The 4011 can only mount on the Pull Side of the door and the 4111 can only mount on the Push Side of the door. Differences - The 4011 and the 4111 cylinders are different and the pinion shafts are...
Special Template ST-2795 is used to mount a non-adjustable (solid) regular arm for pull side mounting.   
ST-1630 is required when mounting a 4041 or 4040XP door closer regular (pull/hinge) side with a concealed GJ100 or GJ410 series over head stop.
14" door leaf is the narrowest with standard template.
 Pneumatic Automatic Operators are used in areas where electrically operated devices are not convenient or permitted.  Consists of a modified, heavy-duty door closer for manual oper...
The 40401/4040XP closer with optional EDA arm has to be mounted parallel arm on the push side of the door.
EDA ARM - The EDA arm is a heavy duty parallel arm mount.  The degree of door opening is determined by the template used for mounting. EDA arm closers can only be mounted as a Push Side parallel ar...