MIL-T-62032 Trucks, Tank: Fuel Servicing And Aircraft Fuel Servicing, 1,000 To 4,000 Gallon, Diesel And Gasoline Engine Driven, 16,000 To 50,000 Pounds Gvw, 4X2, 4X4, 6X4, And 6X6, Modified CommercialThis specification covers diesel and gasoline engine driven, four-wheel, two- or four-wheel drive, and six-wheel, four- or six-wheel drive, single or dual delivery fuel servicing and aircraft fuel servicing tank trucks, with product capacities from 1,000 to 4,000 gallons, having minimum gross vehicle weights GVW of 16,000 to 50,000 pounds for normal operating conditions. Vehicles procured under this specification are commercial items which are warranted by the manufacturer as specified in acquisition documents.

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MIL-T-62032H

the suction stub. The return line shall be tied in with the bottom loading emergency valve for tank fill shutoff control during defuel operation. The tank return line shall be located downstream of the filter/separator and the contamination monitor.

3.8.5.3 Check valves. The tank return line, as well as any other piping or tubing between the tank and pumping system except the tank-to-pump suction line, shall incorporate check

valves to prevent backflow from the tank. The check valves shall comply with 49 CFR,

section 178.340-8 of MC-306. Check valves or manually controlled valves shall also be located

at the inlet and outlet sides of the filter/separator and the contamination monitor to allow routine servicing and replacement of filter/separator elements and fuel quality monitor elements without draining adjacent piping.

3.8.5.4 Tank-to-pump suction line. The tank-to-pump suction line shall provide for adequate flow and smooth operation of the pump under all conditions. The suction line shall incorporate a line strainer and a tank shutoff valve. A flexible coupling may be provided. The suction line shall terminate in the bottom of the tank (not in the sump area) and shall not have a raised seat that will allow sediment and water to collect in the low point area. The product discharge opening shall be of the emergency flow control type designed in accordance with

49 CFR, section 178.341-5 of MC-306, to assure against the accidental escape of the contents. A

readily accessible tank drain shall be provided in the low point area.

3.8.5.5 Deadman pressure control valve. A deadman pressure control valve shall be furnished as an integral portion of the flow control system to operate in conjunction with the pump bypass valve and line to control flow rate and pressure (see 3.8.9.3.2).

* 3.8.6 Filter/separator. A filter/separator shall be mounted in one of the underslung cabinets in such a manner that water removal and filter/coalescer elements are readily accessible for replacement. The filter/separator unit shall be of aluminum or stainless steel construction and designed for a rated flow capacity of not less than 200 gpm (100 gpm for type I and II vehicles) for fuels as specified in 3.5. The filter/separator unit shall utilize not less than 10 filter/coalescer elements (5 for type I and II vehicles) conforming to MIL-F-52308 at a rating of not more than

20 gpm each. Performance requirements of the filter/separator unit shall be certified by the

filter/separator manufacturer to be in accordance with MIL-F-8901. All aluminum parts shall be anodized in accordance with MIL-A-8625 or coated in accordance with MIL-C-5541, class lA. Inlet and outlet connections shall be not less than 3-inch grooved couplings (Victaulic or equal). The filter/separator shall be so installed in the system that all fuel during fueling and defueling operations will pass through the filter/separator. Fuel shall pass through the filter/separator in one direction only, under all conditions. The filter/separator unit and components shall be mounted to minimize vibration, oscillation or swing of the various components. The air bleed line to the tank shall be compatible with the product fuel.