MERRICK 100 VOLUMERIK Series, Инструкция по эксплуатации и техническому обслуживанию

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3.3 Motor Control
a. Volumerik Feeders are supplied standard with a high efficiency PWM
(Pulse Width Modulated) DC drive that provides a 50:1 turndown at full
torque. This permits a wide range of metered material with a single size
auger. The high efficiency of the drive (1.05 form factor) extends motor
and brush life. The drive is mounted off the motor flange and can be
mounted in either of three positions in 90
°
increments.
b. The PWM drive is supplied standard with a 0-100% potentiometer and
START-STOP switch. A 4-20mA signal isolator for external control
can be supplied as an option and can be easily installed in the field.
VFD or timer control is also available.
3.4 Seals
a. The Series 100 utilizes a simple but highly effective seal design that
requires no maintenance. The SEAL is comprised of three rings of
pliable, rectangular Teflon rope that is kept under constant compression
via a wave spring.