3
Baumann™51000 Series Instructions
Instruction
51.LF:IM
April 2007
INSTALLATION
1. Before installing the valve in the pipeline,
thoroughly clean the line of all dirt, welding chips,
scale, oil or grease, and other foreign materials.
2. Installvalvesothecontrolledfluidwillflowthrough
the valve body in the direction indicated by the
arrow.
3. A three-valve bypass permits removal of the
control valve from the line without shutting down
the system.
4. In case of a heat-insulated installation, insulate
the valve body only, not the bonnet.
ACTUATOR REMOVAL (Refer to Figures 1, 2, & 6)
1. Forairtoopenactuators,liftactuatortravel with air
to lessen tension on the upper clamp nut (10).
NOTE
For Air-to-Close,
This is NOT required.
2. Gently tap upper clamp nut (10). With slight
downwardpressureontopoftheactuator,unscrew
the upper clamp nut (10) completely.
3. Type 16 actuator assembly must be unscrewed
from stem adapter (26).
PLUG AND PACKING REPLACEMENT
(Refer to Figures 1 and 2)
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. Forvalvessupplied withtype16 actuators,remove
travel indicator disc (58). With hex jam nuts (27)
still tight, loosen stem adapter (26) from stem
adapter nut (31), and unthread stem adapter (26)
from plug stem (4).
For valves with rated Cv’s less than 1.0, unscrew
packingnut(11)andgentlypullplug(4) outthrough
top of bonnet (6).
For valves with rated Cv’s greater than or equal to
1.0,follow theVALVE DISASSEMBLYinstructions
to first remove the bonnet (6) before removing the
plug (4).
2. Inspect or replace packing (9) and stem guide
(8).
3. Inspect valve plug (4) for wear or particle
accumulation.
VALVE DISASSEMBLY (Refer to Figures 1 and 2)
NOTE
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 valve 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 bonnet hex nuts (7) and lift bonnet (6) off
valvebody (1), which may include packing(9)and
plug assembly (4). (For alloy bodies, lift bonnet
flange (34) off from bonnet (6) and then lift bonnet
(6) off valve body (1).)
2. Remove bonnet gasket (5) and replace.
3. The cage subassembly (3) can be removed by
unscrewing with a flat screwdriver, using the
outer screw slot, and lifting out of valve body
(1). The cage subassembly should be inspected
and cleaned with water or an approved solvent.
For valves with rated Cv's >/= 1.0, remove and
inspect plug guide (33) for wear. Replace if
necessary. Replacement of the entire assembly
willbe necessary if excessive leakage or wearhas
occurred in service.
NOTE
The seat cage gasket (2) must be replaced
when the cage subassembly (3) has been
removed. The seat cage will appear
oblong, this is to prevent loosening of the
soft seat.
VALVE REASSEMBLY
1. Place cage gasket (2) and cage subassembly (3)
in body (1).
2. Tighten the cage (3) hand tight plus 1/8 of a turn.
(For valves with rated Cv’s greater than or equal
to 1.0, insert plug guide (33).)
3. Seat plug (4) in body (1).
4. Placebonnetgasket (5)in body(1). Look atbonnet
(6) and body (1) for correct bonnet orientation.
5. Placebonnet(6) on valvebody(1) and secure with
hexnuts(7). Foralloybodies,placebonnet(6)on
valve body (1), then place bonnet flange (34) over
CAUTION
CAUTION
