275AP-SB13-01
3
Figure 7: 275AF/AP/APF Valve Assemblies
Table 1: Replacement Parts
Description
Part No.
Chamber, Cast Iron (Not shown)
299A
Chamber, Steel (Not shown)
B-10985
Valve Body
270A-VB
Gasket*
73
Cap Screw (6)
325
Float Ball, 275AF/275AP
220A
Float Ball, 275APF
220
Float Rod, 275AF/275AP
343A
Float Rod, 275APF
343D
Float Block
230Z
Float Nut
322
Nut
(275APF - Qty 1, 275AF/275AP - Qty 2)
224
Lock Washer
(275APF - Qty 3, 275AF/275AP - Qty 4)
55
Adjusting Bolt
369
Link
431
Lever Pin
411
Spacer
11S
Roll Pin
211-1/2
Adjusting Nut
204E
Needle and Seat Bushing*
(Must be replaced as matched set)
262403S-1/16
262403S-5/64
262403S-3/32
262A403A-1/8
262A403A-3/16
Mounting Flange (Not shown)
298A
*Spare Parts Kit
(Includes Gasket and Needle and Seat
Bushing)
K275AP1
(1/16
”, 5/64”, 3/32” orifice)
K275AP2
(1/8
”, 3/16” orifice)
SERVICE INSTRUCTIONS
(Needle & seat replacement, c
ont’d)
5. Secure the valve body so the float is approximately
horizontal. Turn the needle in or out of the adjusting nut until
the float is horizontal when the needle is seated in the bushing.
6. Then screw the needle ½-turn into the adjusting nut so the
float is slightly above horizontal when the needle is seated in
the bushing (Figure 8). Tighten the lock nut to secure needle
position.
7. Remove the lever pin and pull the needle from the
bushing. Reassemble the float block to the valve body using
the lever pin and spacers (11S) to ensure the float block
(230Z) is centered on the link (431).
8. Peen the lever pin to retain in place and check for free
movement of the mechanism.
Figure 8: Needle Adjustment
9. With the needle fully seated in the bushing, check to make
sure there is approximately 0.16” (4mm) clearance between
the adjusting bolt head (369) and the valve body. A #20 drill bit
may be used to check this clearance. (See Figure 9.) Setting
the bolt head clearance ensures 0.09” (2mm) of needle travel
when the float drops due to low liquid level.
10. Be sure the lock nut (324) is tightened against the float
block and the entire mechanism pivots smoothly before re-
installing the valve.
Figure 9: Final Adjustment
0.16 [4.1]
0.09 [2.3]
TO SET
NEEDLE
TRAVEL,
ADJUST
BOLT-HEAD
CLEARANCE
FLOAT SHOULD STAND
JUST ABOVE HORIZONTAL
WHEN NEEDLE IS SEATED
220A
322, 55
343A
270A-VB,
325
73
SEAT
BUSHING
NEEDLE
224, 55
204E
431
230Z
411, 11S
211-1/2
324, 55
369, 324
220
275AF & 275AP
275APF
270A-VB,
325
73
343D
55
