System Components
UL EX-4510 12-1-01 Page 1-19
Description
The pressure reducer/union is required to restrict the flow
of INERGEN
®
agent thus reducing the agent pressure
down stream of the union. The 3000 psi (206.9 bar)
NSCWP union contains a stainless steel orifice plate which
is drilled to the specific size hole required based on the flow
calculation.* The orifice plate provides readily visible orifice
identification. The orifice union is available in six sizes:
1/2 in., 3/4 in., 1 in., 1 1/4 in., 1 1/2 in., and 2 in. NPT.
All pressure reducer/unions must be installed in the piping
with the orifice identification tab on the pressure inlet side
of the system. The 1 1/4 in., 1 1/2 in. and 2 in. orifice
unions must be installed per the direction of the flow arrow
stamped on the body.
Pressure Reducer/Union
Shipping Assembly
Part No. Description A B C
416677 1/2 in. NPT pressure reducer/union 2.06 in. (5.2 cm) 1.18 in. (2.9 cm) 1.95 in. (4.9 cm)
416678 3/4 in. NPT pressure reducer/union 2.38 in. (6.1 cm) 1.50 in. (3.8 cm) 2.38 in. (6.1 cm)
416679 1 in. NPT pressure reducer/union 2.63 in. (6.7 cm) 1.78 in. (4.5 cm) 2.77 in. (7.0 cm)
416680 1 1/4 in. NPT pressure reducer/union 2.94 in. (7.5 cm) 2.04 in. (5.2 cm) 3.31 in. (8.4 cm)
416681 1 1/2 in. NPT pressure reducer/union 3.31 in. (8.4 cm) 2.31 in. (5.9 cm) 3.70 in. (9.4 cm)
416682 2 in. NPT pressure reducer/union 3.56 in. (9.0 cm) 2.85 in. (7.2 cm) 4.39 in. (11.2 cm)
Component Material Thread Size Approvals
Pressure Reducer/ Body: Forged 1/2, 3/4, 1, UL Listed (EX-4510)
Union Steel 1 1/4, 1 1/2,
2 in. NPT
Orifice Plate:
Stainless
Steel
VISIBLE ORIFICE
IDENTIFICATION
002197
DIRECTION
OF FLOW
ANSUL INCORPORATED, ONE STANTON STREET, MARINETTE, WI 54143-2542 715-735-7411
Form No. F-2001267 ©2001 Ansul Incorporated Litho in U.S.A.
C
A
B
ANSUL and INERGEN are trademarks of Ansul Incorporated or its affiliates.
NOTE: Refer to “Nozzle/Pressure Reducer Range Chart” in
Design Section for detailed orifice range information.
* Orifice diameter must be specified when placing order.
ANSUL
®
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