System Components
UL EX-4510 2-1-12 Page 1-7
REV. 3
Description
The corner pulley is required on an INERGEN
® system
whenever a mechanical release pull cable run involves
a change in direction. Corner pulleys are installed as part
of the cable housing (pipe or conduit) and provide 90°
direction changes with minimal force loss and no induced
kinking.
Two types of corner pulleys are available. One is made of
die cast aluminum, has a ball bearing roller, and uses com-
pression fittings for 1/2 in. EMT connections. The second
type is made of forged brass and is threaded for 3/8 in.
NPT pipe. Two styles of forged brass corner pulleys are
available: one with a brass wheel and one with a nylon
wheel. Both styles of brass pulleys are watertight. The
brass wheel corner pulley is designed for location inside or
outside the protected space. The nylon wheel corner pulley
is designed for location only outside the hazard space.
Thread adaptors are available to simplify the installation.
Corner Pulley
Component Material Thread Size/Type Approvals
Corner Pulley Body: 1/2 in. EMT UL Listed (EX-4510);
Aluminum Listed for use with FM Approved systems
Roller:
Stainless
Steel
Corner Pulley Body: 3/8 in. NPT UL Listed (EX-4510);
Brass Listed for use with FM Approved systems
Wheel:
Brass
Corner Pulley Body: 3/8 in. NPT UL Listed (EX-4510);
Brass Listed for use with FM Approved systems
Wheel:
Nylon
Shipping Assembly
Part No. Description
423250 Aluminum corner pulley
842678 Brass corner pulley (nylon wheel)
845515 Brass corner pulley (brass wheel)
840696 Thread adaptor – (brass pulley only)
ANSUL
®
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