11. Service Instructions
11.3. Installation of product-wetted seals and assembly of the valve
Note! Make sure that all seals and bearing surfaces in the product
area are slightly greased before their installation.
1.
(2" and 3" Sh5 only) Install the guide ring (12) in the lower flange of the
housing (1) using a double joint forceps or long nose pliers.
2.
Install the lower shaft seal (11) in the lower housing flange. For the
small size, we recommend using the 2 insertion tools, see chapter 13.
3.
Install the quad ring (14) in the upper shaft (2) and lower shaft (3).
4.
Insert the middle seal (9) in the upper shaft (3) using the assembly tool
(see chapter 13.2).
5.
Insert the 2 seat seals (10) in the grooves of the upper shaft (2) and
lower shaft (3).
6.
Install the shaft seal (11) and the two guide rings (12) in the shaft
bearing (4).
7.
Slide the shaft bearing (4) over the balancer of the upper shaft (2).
8.
Slide the upper shaft (2) and the shaft bearing (4) through the yoke (6)
and actuator (17).
9.
Align the key and fasten the upper valve shaft (2) with the lock washer
(25) and safety nut (24). Hold the lock washer (25) with a SW30
wrench to keep the lock washer from turning.
Tightening torque: 29 ft-lb (40 Nm)
Caution!
Overtightening the safety nut could result in thread
damage on the upper shaft.
10.
Screw the operating cam on the upper shaft.
11.
Ensure the key is secure on the guide rod. Slide in the guide rod (7)
from the top through the actuator (17) until it stops.
12.
Screw in the stop screw (23) until it stops.
Tightening torque: 7 ft-lb (10 Nm).
The stop screw must be flush with the top of the collar (D4) or piston
(D4 SL).
13.
Slide the lower valve shaft (3) on the guide rod (7). Align the lower
shaft to the key on the guide rod and fasten it with the safety nut (15).
Tightening torque: 29 ft-lb (40 Nm)
14.
Fasten the adapter on the actuator with the 4 screws and ensure that
the air fittings on the CU align properly with the air fittings on the D4
valve.
15.
Screw the operating cam on the guide rod (7).
!
fig. 11.3.
operating cam
upper shaft
23
7
25
24
17
6
12
2
detail x
3
15
12
11
operating cam
lower shaft
4 screws
1
11
4
detail x
10
9
10
14
20
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
!
