Elkhart Brass Python 299-11 - Manual (Page 4)

Page 2
II. I
NSTALLATION
I
NSTRUCTIONS
1. NPT Base
Apply an appropriate thread sealant to the NPT nipple. Thread the monitor base onto
the nipple and tighten with pipe wrench.
2. Flat Faced Flange
a) Attach an ANSI pattern companion flange to the water supply pipe.
b) Seal the flange joint with a full face gasket or suitable flange sealant. Most
wafer type butterfly valves have seats that serve as flange gaskets, and
separate gaskets or sealant is not required.
c) Attach the monitor inlet flange to the companion flange on the water supply
pipe with grade 5 carbon steel or stainless steel bolts with nuts. See Table 1
for quantity and size of bolts. If an Elkhart Brass Model 84 butterfly valve is
installed between the monitor and the companion flange, the bolt length should
be 4-½”.
d) Apply Loctite® #242 to the bolt threads, then thread on the nuts, and torque
the flange bolts to 60-70 ft-lbs for ⅝” and 110-120 ft-lbs for ¾” uniformly in
increments of approximately 20 ft-lbs.
Note: Elkhart Brass recommends using part number 81315001 Companion Flange
Kit for a 3” 150# flat face flange and part number 81317001 Companion Flange Kit for
a 4” 150# flat face flange.
Base # Bolts Size of Bolts Minimum Length of Bolts
2
-
½” 150# ANSI Flange 4 ⅝”-11 UNC 2-½”
3” 150# ANSI Flange 4 ⅝”-11 UNC 2-½”
4” 150# ANSI Flange 8 ⅝”-11 UNC 2-½”
6” 150# ANSI Flange 8 ¾”-10 UNC 3”
2
-
½” 300# ANSI Flange 8 ¾”-10 UNC 3”
3” 300# ANSI Flange 8 ¾”-10 UNC 3”
4” 300# ANSI Flange 8 ¾”-10 UNC 3”
Table 1
Warning:
When installing monitor on a raised face companion flange or butterfly
valve, it is critical that bolts be tightened uniformly to prevent cocking of the monitor relative to the
flange or valve. If the monitor becomes cocked, (see Figure 1) the monitor cast flange base will
fracture and fail when the bolts on the "high" side are tightened.
Figure 1
Improper Flange Installation