Instruction Manual

Instruction Manual

D103365X012

51000 Valve

October 2014

2. Gently tap the upper clamp nut (key 10). With slight downward pressure on top of the actuator, unscrew the upper

clamp nut (key 10) completely.

3. The Baumann 16 actuator assembly must be unscrewed from the stem adapter (key 26).

Plug and Packing Replacement

Refer to figures 2 and 3.

CAUTION

When adjusting the valve stem, do not grip the stem directly with pliers or a wrench. This will damage the surface of the

stem, and cause damage to the packing in the valve.

1. For valves supplied with Baumann 16 actuators, remove the travel indicator disc (key 58). With the hex jam nuts

(key 27) still tight, loosen the stem adapter (key 26) from the stem adapter nut (key 31), and unthread the stem

adapter (key 26) from the plug stem (key 4).

For valves with rated Cv's less than 1.0, unscrew the packing nut (key 11) and gently pull the plug (key 4) out through

the top of the bonnet (key 6).

ForvalveswithratedCv'sgreaterthanorequalto1.0,follow the VALVE DISASSEMBLY instructions to first remove the

bonnet (key 6) before removing the plug (key 4).

2. Inspect or replace the packing (key 9) and the stem guide (key 8).

3. Inspect the valve plug (key 4) for wear or particle accumulation.

Valve Disassembly

Refer to figures 2 and 3.

Note

The actuator must be removed from the valve body before valve body disassembly.

The valve packing box may contain process fluids that are pressurized, even when the v alve has been removed from the pipeline.

Process fluids may spray out under pressure when removing the packing hardware or packing rings, or when loosening the packing

box pipe plug.

1. Remove the bonnet hex nuts (key 7) and lift the bonnet (key 6) off the valve body (key 1), which may include the

packing (key 9) and plug assembly (key 4) [For alloy valve bodies, lift the bonnet flange (key 34) off from the bonnet

(key 6) and then lift the bonnet (key 6) off the valve body (key 1)].

2. Remove the bonnet gasket (key 5) and replace.

3. Thecagesubassembly(key3)canberemovedbyunscrewingwith a flat screwdriver, u sing the outer screw slot, and

lifting out of the valve body (key 1). The cage subassembly should be inspected and cleaned with water or an

approved solvent.