WTR Series
Installation Instructions
WTR Installation & Maintenance Manual 330-15000 • Revision A • August
4.5 Installing WTR-430 through 575
CAUTION: If the actuator is already mounted to a valve from the manufacturer, verify
that the actuator is mounted according to the following instructions. Failure to follow
the installation procedures could result in personal injury or improper operation and
could damage the equipment.
4.5.1 Two-Piece Drive Sleeve
Install actuator as follows:
NOTE: Piece numbers correspond to piece numbers listed in Figure 6.2.
1. Place valve in MID-TRAVEL position.
2. Place WTR in MID-TRAVEL position. Pointer Cap (piece #7) should be halfway
between open and close position.
3. Install the Splined Adapter (piece #32) on the valve shaft and insert the Key to secure the
Splined Adapter. If the Splined Adapter has been factory-machined, insert and tighten the
Setscrew into the Splined Adapter tapped hole to secure it to the valve stem.
4. Remove Pointer Cap (piece #7) to view the Worm Gear (Drive Sleeve - piece #5) and the
Splined Adapter while mounting onto the valve flange and setting Mechanical Stop
Screws (piece #22) and Nut (piece #24).
5. Align and mount the WTR on the installed Splined Adapter. Once the unit is properly
aligned on the valve Mounting Flange, secure the unit with the required number of
mounting bolts. High strength (minimum SAE-Grade 5) hex head or socket head cap
screws with lockwashers are recommended. The quantity and thread size of the actuator
mounting taps are listed in Table 4.3.
4.5.2 One-Piece Drive Sleeve
Install as follows:
NOTE: Piece numbers correspond to piece numbers listed in Figure 6.2.
1. Place valve in closed position.
2. Remove the Pointer Cap (piece #7) from the actuator.
3. Turn operator input shaft until gear unit is in fully closed position (verify correct rotation).
4. Mount the WTR on the valve Mounting Flange, locating the valve Shaft Key in the
keyway of the operator drive sleeve.
5. Bolt the WTR securely to the Mounting Flange. The quantity and thread size of the
actuator mounting taps are listed in Table 4.3.
Table 4.3 – WTR mounting base tap sizes (430 through 575)
Commercial AWWA Tap size and quantity Standard Flange
Unit size/SGA Unit size/SGA MSS ISO MSS ISO
WTRC-430 WTRA-430 (8) 1 - 8 x 1.3 deep, 14.02 B.C. (8) M30 - 3.5 x 34 deep, 356.00 B.C. FA35 F35
WTRA-450 WTRA-450 (8) 1 - 8 x 1.8 deep, 14.02 B.C. (8) M30 - 3.5 x 34 deep, 356.00 B.C. FA35 F35
WTRA-500 WTRA-500 (8) 1.25 - 7 x 1.97 deep, 16.00 B.C. (8) M36 - 4 x 50 deep, 406.00 B.C. FA40 F40
WTRC-575 WTRA-575 (12) 1.25 - 7 x 2.05 deep, 19.02 B.C. (8) M36 - 4 x 52 deep, 483.00 B.C. FA48 F48
4-5
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