Dover OPW 891 Series Quick Start Manual

891 Series Loading-Arm Counterbalance
The 891 Series Hi-Load Counterbalance represents the
best available technology in loading-arm counterbalancing.
Today's applications demand higher spring loads to
accommodate longer reaches and additional equipment
that is commonly specified on loading arms. The 891 delivers
by providing roughly 50% more spring capacity than our
previous counterbalance model.

Benefits

• Easy, Precise Adjustment – A simple turn of the adjustment
bolt provides finite adjustment to tune your loading arm to
the desired balance point.
• No Special Tools Required – Standard socket wrench
• Wide Range of Motion – 80° of motion
(55° up and 25° down)
• Stable Balancing – Through the entire range of motion
• Integral Upward & Downward Travel Stops –
Fully adjustable to limit the range to your application
• Safe, Robust Design – Tested under full-load conditions
for more than 100,000 cycles with no degradation in
performance

Specifications

• Type – Right-Hand/Left-Hand Hi-Load Loading Arm Counterbalance
• Working Temperature Range – -50° F to +176° F
(-46° C to +80° C)

Selection Guide

891 = Series
89 1 D - 48R H - LT
D = 13–16K Swivel
E = 16–19K Size
3 = 3" 3 = 3000
4 = 4" 8 = 8000
6 = 6"
opw-es.com
891 Series
Counterbalance
IMPORTANT: OPW products should be used in compliance
with applicable federal, state, provincial, and local laws and
regulations. Product selection should be based on physical
specifications and limitations and compatibility with the
environment and materials to be handled. OPW MAKES
NO WARRANTY OF FITNESS FOR A PARTICULAR USE.
All illustrations and specifications in this literature are based
on the latest product information available at the time of
publication. OPW reserves the right to make changes at any
time in prices, materials, specifications and models, and to
discontinue models without notice or obligation.
Swivel RH = Right-Handed
Series LH = Left-Handed
ENGINEERING
Low
Temperature