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WCB_D4_D4SL_sch5_US.indd
D4 / D4 SL Schedule 5 Series
Double Seat Mix Proof Valves
Instruction Manual: US - rev. 1
Waukesha Cherry-Burrell
®
brand D4 / D4 SL Schedule 5 Valves
13. Assembly Instructions and Tools for Seals
1.
Provide the seal shoulder with a thin layer of
grease.
2.
Insert the seat seal into the valve shaft;
see to an even inclined position of the seal.
3.
Press the seal circumferentially into the groove
using the seat assembly tool (part no. ) or
a screwdriver with round edges. Place the assembly
tool at the upper seal shoulder. To get an even fit of
the seal, proceed step by step as follows:
3.1.
Press a short piece part of the seal into the groove.
3.2.
With your finger, hold the section of the seal
already pressed in from step 3.1. (This helps pre-
vent loops.) Use the seat assembly tool to press a
short section of the seal in the direction of your fin-
ger. Continue around the circumference to install
the seal into the groove.
4.
Press the seat assembly tool between the seal
shoulder and the groove edge (both sides).
Proceed around the circumference. Then proceed
around the circumference of the lower seal shoul-
der. This is to vent the seal groove and to lock the
seal shoulder.
grease layer
grease layer
upper
valve shaft
lower
valve shaft
Attention!
Shoulders of the seat seals
must be placed evenly
in the seal groove.
seal profile
seal lip
shoulder
seal foot
13.3. Seat seals
VA100-082b
Seat assembly tool,
part no
