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Description
ME990S-2DFM: The ME990S-2DFM double flanged
internal valve is intended for special bobtail truck
applications where the pump must be lowered to clear the
truck frame or other obstacles. A shear section in the
lower body permits the valve to shear off in the event of
an accident, leaving the shutoff within the tank.
ME990S-2F-16: The single flanged ME990S-2F-16 internal
valve is used on transport trucks and eliminates the
threaded tank connection required for threaded valves.
Internal valves can be used with transports and on
stationary storage tanks. The valves can be operated by
cable or with air.
Designed for use with Propane or Anhydrous
Ammonia at ambient temperatures, the valves can be
used on other compressed gases, but the user should
check with the factory to make sure the valves are suitable
for the particular service and application.
Specifications
Specifications
Body Size and End Connection Styles:
ME990S-2F-16, and ME990S-2DFM Inlet:
2-inch CL300 RF Flange
(3 5/8-inch / 92 mm diameter bore)
ME990S-2F-16 Outlet: 2" FNPT
ME990S-2DFM Outlet: 2-inch CL300 RF Flange
Maximum Allowable Inlet Pressure:
500 psig / 34.5 bar WOG
Excess Flow Springs
Half Coupling Flows:
2" (vertical down): 110, 160 & 260 gpm
(416, 606, 984 lpm)
Form #995 ME990S-2F-16 & ME990S-2DFM IOM
ME990S-2F-16 and ME990S-2DFM
Temperature Capabilities:
-20° to 150°F / -29° to 66°C
Approximate weight:
ME990S-2F-16: 20 pounds /9 kg
ME990S-2DFM: 30 pounds / 14 kg
DOT Internal Self-Closing Stop Valve Requirement:
U.S. Department of Transportation (DOT) regulations
49CFR§178.337-8(a)(4) require each liquid or vapor
discharge outlet on cargo tanks (except for cargo tanks
used to transport chlorine, carbon dioxide, refrigerated
liquid, and certain cargo tanks certified prior to January 1,
1995) to be fitted with an internal self-closing stop valve.
MEC ME990S Series internal valves comply with the
internal self-closing stop valve requirement under the DOT
regulations.
Installation
Internal Valve
Coat both sides of the spiral wound gaskets with Dow
Corning
ASME CL300 RF flange with a modified bore (see Figure 1)
must be installed in the tank. Special stud bolts, furnished
with the valve, are assembled into this flange. The internal
valve and the pump or piping flange can then be installed
as shown in Figure 2.
On valves so equipped, the filter screen should be
removed if the valve is to be used for both filling and
withdrawal service or for filling alone. Filling with the filter
screen installed is not recommended.
#111
silicone grease or equivalent. A 2-inch
Rev E 2/3/21
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