Condensate Drains - Pneumatically Operated - Gardner Denver RHC Series Instruction Manual

4.4 Condensate Drains - Pneumatically Operated

A. Monthly- Flush out accumulated sludge and dirt by
opening manual drain valves.
20
29
26
36
18
15
20
3
7
9
8
10
DETAIL B
14
DETAIL C
16
24
27
28
31 31
See Exploded View
17
16
1
4
5
6
DETAIL A
2
37
11
19
13
38
Seal Ring Retainer
Rod
B. Disassemble and service at least once a year. NOTE:
Before starting the servicing procedure, make sure you
have a repair parts kit on hand.
1. Close valve ahead of drain.
2. Depressurize drain by opening manual drain valve.
3. Disconnect drain lines.
4. Remove shell bolts (27, 28) and detach bottom shell
assembly (26). Remove seal ring retainer (24) and case
seal ring (29).
5. To rebuild drain mechanism:
a. Remove six screws (14) from piston cylinder (38) and
remove cylinder.
b. Remove nut (19), lock washer (11), piston discs (9 &
10), piston seal (8), and key washer (7) from bottom
of valve stem assembly.
c. Remove valve stem assembly (3) from valve body (2)
by lifting valve stem assembly upward.
d. Remove retainer clip (36) and pivot pin (17), and lift
float arm assembly (15) off of valve stem assembly
(3).
e. Remove pilot valve screw assembly (18) from float
arm assembly and replace with a new assembly from
the repair parts kit. Reassemble float arm assembly
to valve stem assembly using new pivot pin and
retainer clip from repair parts kit.
f. Remove valve sleeve (5) from valve stem assembly
and replace valve disc (4) with new disc from repair
parts kit.
g. Replace sleeve seal ("V" ring) (6) on valve sleeve
making sure "V" shape is in the same position as
shown on Detail A on drawing.
h. Reassemble valve sleeve to valve stem assembly as
shown on drawing. Lubricate sleeve seal with lubri-
cant supplied with repair parts kit or petroleum jelly.
i. Reassemble piston, and piston seal ("V" ring) (8) using
new parts from repair parts kit.
j. Reassemble key washer (7), piston assembly, lock
washer (11), and nut (19) to valve stem assembly.
Make sure "V" shape of piston seal is in the same
position as shown on Detail B and that the key on
the key washer is in the hole (37) directly opposite
drain connection on valve body.
k. Lubricate piston seal, and piston cylinder wall with
lubricant supplied in repair parts kit or petroleum
jelly.
l. Reassemble piston cylinder (13) to valve body with
six screws. Make sure bleed hole (38) in piston
cylinder is not plugged up. Raise and lower valve
assembly to make sure it operates freely.