3
IOM-A-Deringer 40G/40GX/50G/50GX_6-8
2005
EDP#2916009
© 2020 Watts
Closing Shutoff Valves Prior to Maintenance
1. Slowly rotate shutoff valve #2 handle to the closed
position. Stem concealed (A).
2. Slowly rotate shutoff valve #1 handle to the closed
position. Stem concealed (A).
NOTICE
When the threaded portion of the OS&Y stems are fully exposed above the
handwheel the shutoff valves are in the open position. Before doing any
maintenance be sure to turn the handwheel towards the closed position until
the threaded portion of the OS&Y stems have receded down into the bonnet
indicating the shutoff valves are in the closed position (A).
FLOW
FLOW
A
Closed
Open
Opening Test Cocks and Bleeding All Pressure
from the Line Before Maintenance
NOTE: valve is still under pressure. When opening test cocks,
water will be released. Take precautions to ensure discharging
water does not damage the surrounding area/equipment or
create an unsafe condition.
1.
DO NOT OPEN
Main test cock number 1, as it is still
subject to line pressure.
2. Using the Deringer
TM
test cock wrench or a small adjust-
able wrench open (A) main test cock number 4. (Test cock
is open when wrench flats are parallel to water flow through
test cock)
3. Deringer 50G/50GX Only: Using a #2 flathead screwdriver
open bypass test cock number 2. (Test cock is open when
screwdriver slot is parallel to water flow through test cock (B)
4. Using the Deringer test cock wrench or a small adjustable
wrench open main test cock number 3.
5. Deringer 50G/50GX Only: Using a #2 flathead screwdriver
open bypass test cock number 1.
6. Using the Deringer test cock
wrench or a small adjustable
wrench open main test
cock number 2.
FLOW
B
B
A
A
Bypass Test Cock
Main Test Cock
Closed
Open
Closed
Open