Setting Position Limit Stops For Hbc-4 Through -7; Hbc Angular Displacement Tolerances; Figure 2.3 - Hex Nut Type Stop (Hbc-0 Through -3); Table 2.1 - Hbc Angular Displacement Tolerance - Flowserve Limitorque HBC Series User Instructions

Figure 2.3 – Hex nut type stop (HBC-0 through -3)
Limit stop
housing
Hex nut "A"
Cover plate

2.6 Setting Position Limit Stops for HBC-4 through -7

Refer to Figure 4.2.
1. With the valve in the full closed position, remove Stop Screw Cover (piece #16).
2. Remove the Lockscrew (piece #17).
3. Adjust the appropriate Stop Screw (piece #17) based on rotation of the drive sleeve — inward if valve is closed
and stop has not yet been reached, or outward if stop has been reached and valve is not yet fully closed.
4. Once the stop screw is set, lock securely with lockscrew.
5. Operate the valve to fully open position and set open stop in the same manner.

2.7 HBC Angular Displacement Tolerances

Table 2.1 – HBC angular displacement tolerance
Gearbox Size
HBC-0
HBC-1
HBC-2
HBC-3
HBC-4
HBC-5
HBC-6
HBC-7
Note 1: Stops used on HBC-0 through HBC-3 incorporate standard hex nuts. The tolerance listed is ±0.31 from basic size on the
thickness. The data shown above is based on maximum thickness of both nuts.
Note 2: Displacement is based on 45° travel on either side of gear centerline.
Note 3: Gearboxes with serial numbers less than S/N 365365 have 110° gear segments.
Index mark
on drive sleeve
Bolt "C"
Hex nut "B"
Angular Displacement
Stop
105°
1
114°
1
114°
1
114°
1
±7°
2
±6.75°
2
±9°
2
±9°
2
Limitorque HBC Series FCD LMENIM3501-01 – 03/14
Two index marks appear
on housing cover
Bolt "D"
Gear
170° Gear Segment
170° Gear Segment
170° Gear Segment
170° Gear Segment
3
±7°
±6.75°
±9°
±9
Splined Tooth
Space in Degrees
9.00°
6.42°
4.50°
3.46°
3.00°
2.14°
1.80°
N/A
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