Install Instructions

Document No. 129-233
Installation Instructions
September 29, 2009
Page 2 of 5 Siemens Industry, Inc.
Installation
1/2-inch normally open valves
Removing the Packing and the Stem and Plug
Assembly. (See Figure 1.)
Figure 1. Normally Open 1/2-inch Valve.
1. Remove the actuator by following the
instructions included in the packing cartridge kit.
2. Remove and discard the packing cartridge
using a 1-1/16 inch wrench.
3. Remove and discard the copper gasket (the
gasket cannot be reused). Clean the gasket
surface of the valve.
4. Remove and discard the stem and plug
assembly (the assembly cannot be reused).
5. Examine the valve seat surface for nicks and
scratches. Replace the valve if the seat is
damaged.
Replacing the Stem and Plug Assembly and
Packing
1. Place the new copper gasket on the valve
bonnet.
2. Insert the new stem and plug assembly into the
valve body.
CAUTION:
Be careful not to nick the seat. The valve
must be replaced if the seat is damaged.
3. Insert the new packing cartridge into the valve
bonnet. Use a 1-1/16 inch wrench to tighten the
cartridge applying 35 to 40 lb-ft (47 to 54 Nm)
torque.
4. Assemble the actuator to the valve using the
instructions in the packing cartridge kit.
3/4- to 2-inch normally open valves
Removing the Packing and the Stem and Plug
Assembly. (See Figure 2.)
Figure 2. Normally Open 3/4- to 2-inch Valves.
1. Remove the actuator by following the
instructions included in the packing cartridge kit.
2. Remove and discard the packing cartridge
using a 1-1/16 inch wrench.
3. Remove and discard the copper gasket (the
gasket cannot be reused). Clean the gasket
surface of the valve.
4. Remove and save the bonnet using an
adjustable wrench.