Bell & Gossett HS 601G Pilot Operated Pressure and/or Temperature Steam Regulators Series 2000 - Manual (Page 21)

Temperature Pilot Repair
1. Put pilot in vise with top up. Remove the bottom plug
(4). The strainer (8), spring (5) and button (6) should
drop out when the bottom plug is removed.
2. Remove the seat (2) using a 9/16" thinwall socket.
The valve plug (9) will drop out also.
3. Clean and inspect all parts, lap plug (9) and seat (2)
with 400 grit lapping compound. Replace if necessary.
4. Apply non-hardening sealant to bottom plug (4)
threads. Reassemble pilot.
5. Retest pilot.
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y
y
y
y
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y
y
y
y yy
y
y
y y y
y
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150…F
70 …C 60 …C 50 …C
125…F
◆ BELLOWS
HOUSING
◆ BULB
◆ ADJUSTMENT KNOB
Temperature Pilot
15. ACTUATOR ASSEMBLY
◆ ALLEN LOCK SCREW
14 .PUSH
ROD
6. BUTTON
3. GASKET
12. ADJUSTMENT
SLEEVE
9. PLUG
10. SEAL
BELLOWS
ASSEMBLY
11. GASKET
✽ 1. BODY
2. SEAT
8. STRAINER
5. SPRING
4. BOTTOM
PLUG
7. GASKET
13. OVERHEAT
ASSEMBLY
◆ CALIBRATION
SET SCREW
Notes: ◆ Assembly not required
in the field.
✽ Numbers indicate
assembly sequence.
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