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Item
V1
Upstream Valve Volume
V2
Downstream Valve Volume
D
Pipe Size NPT (in.)
L
Pipe Length (ft)
P
Valve Inlet Pressure (psig)
C
Burner Maximum Firing (cf/hr)
a
Divide inches w.c. by 27.7 to get psi.
b
Divide Btuh by 1000 to get cf/hr for natural gas or by 2550 to get cf/hr for LP gas.
Calculation of Valve Train Volume:
X = V1 + V2 + (A x L ÷ 144)
X = 0.0218 + 0.0267 + (3.356 x 1.75 ÷ 144) = 0.0893.
Calculation of Valve Proving Test Time:
Pipe Size NPT
(inches)
V4295
3/8
0.0002
1/2
0.0002
3/4
0.0008
1
0.0009
1-1/4
0.0045
1-1/2
0.0045
2
0.0089
2-1/2
0.0441
3
0.0441
4
—
Pipe Size NPT
(inches)
V4295
3/8
0.0011
1/2
0.0011
3/4
0.0026
1
0.0036
1-1/4
0.0148
1-1/2
0.0148
2
0.0267
2-1/2
0.0554
3
0.0554
4
—
RM7800L1087; RM7840G1022,L1075; EC7840L1014 RELAY MODULES WITH VALVE PROVING
Table 12. VPS Worksheet Example.
Description
a
b
Table 13. V1 Upstream Volumes for Honeywell Valves.
V4297A1013
V4297A1005
—
—
—
—
0.0093
0.0090
0.0093
0.0090
0.0093
0.0090
0.0093
—
0.0093
—
—
—
—
—
—
—
Table 14. V2 Downstream Volumes for Honeywell Valves.
V4297A1013
V4297A1005
—
—
—
—
0.0282
0.0232
0.0282
0.0232
0.0282
0.0232
0.0282
—
0.0282
—
—
—
—
—
—
—
Information
Lookup Table
V5055
12
V4295
13
2 in. NPT
14
1.75 ft
—
2
—
2.5 mbtu
—
Test Time = 187,000 x (P x X ÷ C)
Test Time = 187,000 x (2 x 0.0893 ÷ 2500) = 13.4
seconds.
Round up to 14 seconds; enter 14 seconds into the VPS
Setup.
V48
—
—
—
—
0.0010
0.0046
0.0010
0.0046
0.0035
0.0046
0.0035
0.0218
0.0048
0.0218
0.0048
0.0227
0.0048
0.0227
—
0.0779
V48
—
—
—
—
0.0048
0.0067
0.0048
0.0067
0.0110
0.0067
0.0110
0.0238
0.0184
0.0238
0.0184
0.0245
0.0184
0.0245
—
0.0801
27
Results
0.0218
V1
0.0267
V2
3.356
A
1.75
L
2
P
2500
C
V5055
V5097A1004
—
—
0.0066
0.0066
0.0066
0.0066
0.0066
—
—
—
V5055
V5097A1004
—
—
0.0093
0.0093
0.0093
0.0093
0.0093
—
—
—
Formula Item
V5097A1012
—
—
—
—
—
—
0.0285
0.0285
0.0285
—
V5097A1012
—
—
—
—
—
—
0.0303
0.0303
0.0303
—
66-1162—2
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