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BP-006 · Cistern token bucket
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A
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D
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F
0
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400
288
241
L=165
25
2
1
22
5
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B
D
C
SECTION A-A
SCALE 1:2.5
Ø3.5
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4
7
8
13
10
DETAIL B
FILL VALVE, JET Ø3.5 · SCALE 2:1
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16
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DETAIL D
DROP VALVE SEAT, LIFT 24 · SCALE 1:1
A
A
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VIEW C
LID 2 REMOVED · SCALE 1:2.5
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86
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113
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139
4
165
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192
0
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TIME t, s (MODEL CLOCK)
TOKENS IN TANK
REQ
L, mm
CAPACITY, FLOAT VALVE SHUT
OVERFLOW CREST
ONE TOKEN: BELOW IT A PULL IS REFUSED
DIAGRAM 1
ACCENT: WATER = TOKENS · ● ACCEPTED · × REFUSED · THIN: LAST CYCLE
TOKEN BUCKET
BUCKET SIZE b
ONE TOKEN
REFILL RATE r
REQUEST
REJECT (HTTP 429)
TOKENS ABOVE b LOST
CISTERN
LEVEL L0 TO FLOAT SHUT-OFF
ONE DOSE, 26.3 mm OF LEVEL
JET 4, Ø3.5 AT 3 bar, LEVEL-FREE
A PULL ON KNOB 26
DOSE FLOAT 21 ON STOP 22, KNOB LOCKED
FLOAT SHUTS; TUBE 19 OVERFLOWS IF HELD
VALUE
4 TOKENS = 6 L
1.5 L
0.097 TOKEN/s
TAKES 1 TOKEN
BELOW 1 TOKEN
CREST 185
TABLE 1 · TOKEN BUCKET ↔ CISTERN
NOTES
1. 1 TOKEN = 1 DOSE = 1.5 L = 26.3 mm OF LEVEL; CAPACITY 4 TOKENS.
2. REFILL THROUGH JET 4, Ø3.5 AT 3 bar: Q = Cd·a·√(2Δp/ρ) = 0.146 L/s.
3. Q DOES NOT DEPEND ON THE LEVEL: ONE TOKEN EVERY 10.3 s. FLOAT SHUTS AT L=165.
4. A PULL IS ACCEPTED ONLY WITH ONE TOKEN IN THE TANK: DOSE FLOAT 21 OFF STOP 22.
5. DOSE DRAINS BY TORRICELLI, Q = Cd·A·√(2gh), Ø44 SEAT. CREST 185: HARD CAP.
ITEM
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DESCRIPTION
CISTERN BODY 380×150 INSIDE
LID
VALVE BODY, SHANK G1/2
NOZZLE, JET Ø3.5 (REFILL ORIFICE)
BACKNUT G1/2
TANK WASHER 1/2"
DIAPHRAGM Ø36×2
DIAPHRAGM CAP WITH FORK
PLUNGER Ø6
PIVOT PIN Ø3×16 ISO 2338
FLOAT ARM
BALL FLOAT Ø70
OUTLET SHROUD
CC BOLT M8×80 ISO 4017, NUT
DROP VALVE HOUSING G2
SEAT WASHER Ø92×3
BACKNUT G2
DOUGHNUT WASHER
PLUG, OVERFLOW TUBE Ø32×2
PLUG SEAL Ø52×4
DOSE FLOAT Ø92, HOLLOW
STOP COLLAR
BRIDGE
PULL ROD Ø6
LID BUSH
PULL KNOB Ø28
MATERIAL
VITREOUS CHINA EN 997
VITREOUS CHINA
POM-C
CuZn39Pb3
PA66
EPDM 70
EPDM 60
POM-C
POM-C
A2 STAINLESS
PA66-GF30
PP
PP
A2-70
PP
EPDM 70
PP
EPDM CELLULAR
PP
NBR 70
PP
POM-C
PP
PA6
POM-C
ABS
QTY
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1
1
1
1
2
1
1
1
1
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1
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1
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TITLE
WC CISTERN · TOKEN BUCKET
DWG NO
BP-006
SCALE
1:2.5
SIZE
A2
SHEET
1 / 1
DRAWN
CLAUDE
DATE
2026-10-15
MATERIAL
SEE PARTS LIST
GENERAL TOL.
ISO 2768-m
UNITS
mm · L · s
LIVE · CLOCK 4× · PULL THE KNOB OR SPACE = REQUEST · H HOLDS FLOAT · R REFILL
Pull the knob ·
Space
request ·
H
hold the float down ·
R
refill ·
S
slow
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