Page: 18
MV & LV SERIES ENGINEERED DRY CHEMICAL FIRE EXTINGUISHING SYSTEM
OPERATION, DESIGN, & SERVICE MANUAL
REV C
Document # DOC324
Issued: April 26, 2018
Revised: March 22, 2022
UL FILE # EX27541
Section 2 System Components and Description
2.2.5 Discharge Connection Fittings
Fittings are used to connect the discharge outlet to its associated piping system in order to accommodate
differences in size, outlet connection, and/or orientation between the discharge outlet and discharge piping.
e fittings used vary according the Series valve.
2.2.5.1 Mv Series Fittings
(See Figure 2.2.5.1 for P/N)
e fittings for the Mv Series discharge
outlet consist of two 2 in (50 mm) grooved
couplings, one 2 in (50 mm) grooved
elbow, and one 2 in (50 mm) grooved to
NPT adapter arranged as shown in Figure
2.2.5.1. ese fittings extend the discharge
outlet and allow for connection of 2 in (50
mm) NPT piping to the 2 in (50 mm)
grooved outlet. Elbow outlets may be
oriented in any direction.
2.2.5.2 Lv Series Fittings
(See Figure 2.2.5.2 for P/N)
e fittings for the Lv Series discharge
outlet consist of one 3 in (80 mm) grooved
coupling and one 3 in (80 mm) grooved
elbow arranged as shown in Figure 2.2.5.2.
ese fittings extend the discharge outlet
and facilitate the attachment of discharge
piping. Elbow outlets may be oriented in
any direction.
Figure 2.2.5.1 Mv Series Fittings
2” Grooved
to NPT Adapter
(50 mm)
P/N 18474
2” Grooved
Coupling
(50 mm)
P/N 18555
2” Grooved
Coupling
(50 mm)
P/N 18555
Shipped with
Cylinder Valve
as part of Anti-
Recoil Safety
Device
2” Grooved
Elbow
(50 mm)
P/N 18551
8.21 in
209 mm
6.0 in
152 mm
Figure 2.2.5.2 Lv Series Fittings
3” Grooved
Coupling
(80 mm)
P/N 18554
Shipped with
Cylinder Valve as part of
Anti-Recoil Safety Device
3” Grooved
Elbow
(80 mm)
P/N 18550
9.84 in
250 mm
4.25 in
108 mm
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