Liquid Controls Avery-Hardoll BM Series, Руководство по обслуживанию и список запасных частей

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TP0003B
BM BULKMETER
Chap 5
Page 11
SERVICING
Table 1 - Fits and Clearances
ITEM DESCRIPTION CLEARANCE OR DIMENSION
1 Overall clearance between rotor & inner covers.
Single Capsule 0.10 mm to 0.15 mm (0.004 in. to 0.006 in.)
Double Capsule 0.15 mm to 0.20 mm (0.006 in. to 0.008 in.)
Triple Capsule 0.20 mm to 0.25 mm (0.008 in. to 0.010 in.)
2 Clearance between tip of vane and bore of body. 0.15 mm to 0.25 mm (0.006 in. to 0.010 in.)
3 Clearance between rotor
and bore of body.
BM250, BM950 A
B 0.03 mm to 0.04 mm (0.0015 in. to 0.0017 in.)
0.09 mm to 0.11 mm (0.0035 in. to 0.0043 in.)
See Fig 5.8
Position A --Upper position
BM450, BM550 A
B 0.17 mm to 0.22 mm (0.007 in. to 0.009 in.
0.10 mm to 0.13 mm (0.004 in. to 0.005 in.)
Position A --Upper position
B --Lower
BM650, BM750 A
B 0.07 mm to 0.13 mm (0.003 in. to 0.005 in.)
0.11 mm to 0.14 mm (0.0043 in. to 0.0055 in.)
4 Overall length of vane assembly from vane tip to
vane tip.
207.06 mm (8.152 in.)
5 Internal diameter of gland seal ring. 9.34 mm to 9.36 mm (0.3678 in. to 0.3686 in.)
6 Outside diameter of vane rod. 9.27 mm to 9.29 mm (0.3650 in. to 0.3658 in.)
7 Clearance between gland seal ring. 0.05 mm to 0.90 mm (0.0020 in. to 0.0036 in.)
8 Rotor Compression Spring To give load of 6.3 to 7.2 kg at 15.87 mm
(14 to 16 lbf at 0.625 in.)
9 Vane Compression Spring To give load of 3.2 to 3.4 kg at 6.86 mm
(7 to 7.5 lbf at 0.27 in.)
10.15 Position the clamp plate (32), fit a new tab washer (33) to the securing screw (34).
CAUTION : DO NOT over-tighten the screw and check that the clamp plate will not foul the vane rods
during operation. Secure the clamp plate.
10.16 Ensure that each gland seal ring (30) is a free fit within the gland distance piece (31).
10.17 Locate vane and rods into their correct slot in the rotor, ensuring the recessed face of the vane is
towards the stepped face of the rotor slot.
10.18 Refit the vane washers (41) on the correct rods and refit the opposite vane by repeating paragraphs
10.18 to 10.21. Ensure the vane is seated on the washers by lightly tapping with a rubber mallet.
10.19 Repeat the above procedures for the second vane assembly. Ensure that the assemblies are a free
fit within the rotor by slowly revolving the rotor by hand and allowing each assembly to fall slowly
under its own weight.
10.20 Fit rotor tool TASS 5006 and turn the rotor to fully depress two adjacent vanes against the metering
crescent (smaller radius in body) to aid correct final positioning. The rear ball race should seat evenly
in the rear inner cover and when finally positioned the rotor should revolve freely.