NIBCO Check Valve Bronze Swing - Manual (Page 2)

NIBCO Technical Services • Phone: 1.888.446.4224 • Fax: 1.888.336.4224
2
1.0 GENERAL INFORMATION
1.1 SCOPE
These instructions are furnished for use in the installation, operation and maintenance of
NIBCO 1/4” to 3” Class 125, 150, 200 and 300 bronze check valves, with screwed in
bonnet.
1.2 GENERAL
DATA
A. MANUFACTURER
NIBCO INC.
1516 Middlebury Street
Elkhart, IN 46516
Phone: (574) 295-3000
B. FIGURE NUMBERS AND DESCRIPTIONS
Figure
Description
Number (Gate Valves)
T-413 Class 125 threaded end, screw in bonnet,
B – bronze disc, Y – PTFE disc, W – Buna-N disc
S-413 Class 125 solder end, screw in bonnet,
B – bronze disc, Y – PTFE disc, W – Buna-N disc
T-433 Class 125 threaded end, screw in bonnet,
B – bronze disc, Y – PTFE disc
S-433 Class 125 solder end, screw in bonnet,
B – bronze disc, Y – PTFE disc
T-453 Class 200 threaded end, screw in bonnet,
B – bronze disc, Y – PTFE disc
T-473 Class 200 threaded end, screw in bonnet,
B – bronze disc, Y – PTFE disc
All threaded end preparations of valves meet American National Pipe Thread
(N.P.T.) requirements.
All solder end valves meet the requirements of ANSI Standard B16.22.
C. IDENTIFICATION PLATES
Identification of the bronze swing check valves is made by checking for the name
NIBCO cast onto the side of the valve body. The steam rating and WOG rating is
a cross reference with the figure number listed above. These valves are
directional. In order for them to function properly, they must be installed with the
arrow pointing with the direction of flow. The arrow for direction of flow is cast
onto the side of the body. In order to determine the type of seat that is used
within the valve, it is necessary to look into its end and determine the seat type.
The bronze disc will be metallic, the PTFE disc is always white in color and the
Buna-N disc is black and softer than the other two.