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Results listed in this table are for chemicals in a pure state. The degree of corrosion
resistance may differ from this table with the presence of other chemicals, different
concentrations, mixed substances or damage to the nickel surface layer.
46
Options and Technical Data
VFD PACKAGES
Harrington’s standard variable frequency drive packages
for ER hoists include:
• VFD installed in a NEMA 12/13 electrical enclosure
• VFD programmed & tested to customer’s specs
for speed(s) and/or acceleration
• Branch circuit fuses to protect the VFD and the hoist motor
• Mounting bracket for VFD enclosure
• Wiring and hardware
Reduces the potential for making
hazardous, over-capacity lifts.
The load limiter is preset at 115%
of rated capacity and protects the
hoist mechanism from damage
due to overloading. Overloading
the hoist electrically activates the
load limiter, making the hoist
inoperable (load can still be
lowered at any time).
These special premium chains
give the advantage of increased
resistance to corrosion. Ideal for
job sites affected by rain, saltwater,
steam and chemicals.
Both NP (Nickel Plated) and
ND (Nickel Diffused) load chains
offer superior resistance to
corrosive conditions.
Generic design to fit most hooks.
Available in standard steel or
stainless steel. Neck and throat
dimensions can be combined
for proper fit. (Example, neck
size E with throat size L.) Neck
measurement must be diameter—
not circumference. Latch kit
brochures available upon request.
Contact Customer Service for
dimensions not shown.
Corrosion Resistance Test Results for NP and ND Chains
Concentration Resistance to
Substance % Corrosion
Sulfuric Acid 10 Some
Inorganic
Nitric Acid 10 Some
Acids
Hydrochloric Acid 10 Some
Phosphoric Acid 10 Slight
Boric Acid 5 Slight
Organic
Acetic Acid 10 Slight
Acids
Tartaric Acid 10 No
Alkalis
Caustic Soda 10 No
Ammonia Hydroxide 10 Slight
Air-Indoor/Outdoor — No
Others Seawater — Slight
Seasonings — No
Latch Kit Neck Diameter Throat Opening
Product N T
Code (in) (in)
A
9
⁄16 to
5
⁄8 1
1
⁄16 to 1
1
⁄8
B
3
⁄4 to
13
⁄16 1
1
⁄4
C
7
⁄
8 to 1 1
3
⁄
8 to 1
1
⁄
2
D1
1
⁄8 to 1
1
⁄4 1
3
⁄4 to 1
7
⁄8
E1
3
⁄8 to 1
1
⁄2 2
1
⁄16
F1
5
⁄
8 to 1
11
⁄
16 2
1
⁄
4
G1
3
⁄4 to 1
13
⁄16 2
1
⁄2
H1
7
⁄8 to 2 3
J2
1
⁄
16 to 2
1
⁄
8 3
3
⁄
8
K2
3
⁄16 to 2
1
⁄4 3
1
⁄2
L2
5
⁄
16 to 2
3
⁄
8 3
3
⁄
4
M2
7
⁄
16 to 2
3
⁄
4 4
O 3 to 3
1
⁄4 4
1
⁄2
Figure 1—Latch Kits
CORROSION-RESISTANT CHAINS
UNIVERSAL LATCH KITS
LOAD LIMITER