Overview of Primary Product

V5055A-F INDUSTRIAL GAS VALVES
5 60-2307—16
Approvals:
The following combinations of V5055 Valves (3/4 through 4 in.)
and V4055, V4062 and V9055 Fluid Power Actuators are
approved by these agencies:
Underwriters Laboratories Inc. Listed: (File No. MH1639,
Guide No. YIOZ):
V4055A,B,D,E/V5055A,B,C,D,E,F
V4062/V5055A,B,C,E,F
V9055/V5055A,B,C,E,F
Swiss Re (Formerly GeGap/IRI) Acceptable:
V4055A,B,D,E/V5055A,B,C,D,E,F
V4062/V5055A,B,C,E,F
V9055/V5055A,B,C,E,F
Factory Mutual Approved (Report No. ID9AZ.AF).
CSA File No. 158158-1205788:
V4055A/V5055A,B V4055E/V5055E
V4055B/V5055D V4062/V5055B,C
V4055D/V5055C V9055/V5055B,C
NOTE: CSA does not certify models equipped with
BSP threads.
British Gas Corporation and Dutch Gas Institute Approved:
V4055 or V4062 with V5055A1145, A1152, A1160,
A1178, B1168, B1184, B1192, B1200, B1218.
Australian Gas Association Approved:
V5055B1267, B1275, and B1291.
DIN-DVGW Approved (Germany):
V5055A1145, A1152, A1160, A1178, B1168, B1184, B1192,
B1200, and B1218.
GAS VALVE SIZING
1. Check the burner nameplate for (a) the type of gas used,
and (b) the gas flow capacity. The capacity will
be listed in Btu/h (Btus per hour) or in cf/h (cubic foot per
hour).
2. Call the gas utility for information on (a) the specific grav-
ity (sp gr) and (b) Btu per cubic foot (Btu/cu ft) for type of
gas used.
3. Find the capacity in cf/h. If the capacity is listed in
Btu/h, convert to cfh by the following formula:
Capacity in cf/h = :Btu/h (from burner nameplate)
Btu/cu ft (from gas utility)
4. For gases with specific gravities other than 0.64, multiply
the burner cfh by the proper conversion factor. See Table
6.
Table 6. Gas Conversion Factors.
5. Use the corrected burner capacity in cf/h when
determining the gas valve size in Fig. 1.
6. Determine the maximum pressure drop across the valve
and draw a horizontal line at this pressure in Fig. 1.
7. Draw a vertical line in Fig. 1 at the capacity (cf/h)
previously determined. Use the corrected capacity for
a gas with a specific gravity other than 0.64.
8. Use the valve size at the intersection of the horizontal
and vertical lines. If the intersection is between valve
sizes, use the next higher size to the right.
TO SIZE TWO IDENTICAL VALVES
PIPED IN SERIES
1. Find the cf/h for the type of gas used.
2. Consider both valves as one unit. Determine the total
maximum pressure drop across the unit.
3. Find the pressure drop across the first valve by
assuming it to be 45 percent of the total pressure drop.
4. Find the valve size from Fig. 1.
5. The second valve will be the same size as the first valve.
Type of Gas sp gr (average) Multiply cf/h by:
Manufactured 0.60 0.968
Mixed 0.70 1.046
Propane 1.53 1.546
Butane 1.98 1.759