MIL-V-46727 Valve, Three Position, Four Way, Hydraulic, Manual Use Mil-Dtl-46725This specification covers two types of manually operated, three-position, four-way, hydraulic directional control valves with an operating pressure of 3000 pounds per square inch psi see 6.1.

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MIL-V-46727C(AT)

TABLE. Classification of defects - Continued.

Category

Defect

Method of

examination

Minor

201

202

203

204

205

AQL 2.5% Defective

Dimensions not affecting interchangeability not

within tolerance (see 3.3).

Weight greater than specified (see 3.3.5).

Marking illegible or incorrect (see 3.5). Finish not as specified (see 3.6).

Faulty workmanship (see 3.7)

SIE or Functional SIE

Visual Visual Visual

1/ SIE = Standard Inspection Equipment.

4.5.3 Tests. Each valve selected in accordance with 4.5.1.3 shall be subjected to the quality conformance tests specified in table I, in the order specified using an AQL of 1.0 on the basis of percent defective.

4.6 Failure. Failure of any valve to pass any of the specified quality conformance tests shall be cause for the Government to refuse acceptance of the production quantity represented, until action taken by the contractor to correct defects and prevent recurrence has been approved by the Government.

4.7 Methods of inspection.

4.7.1 Materials and construction. Conformance to 3.2 through 3.3.4 shall be determined by inspection of contractor records providing proof or certification that design, construction, processing, and materials conform to requirements. Applicable records shall include drawings, specifications, design data, receiving inspection records, processing and quality control standards, vendor catalogs and certifications, industry standards, test reports, and rating data.

4.7.2 Defects. Conformance to 3.3, 3.3.3 through 3.3.5 and 3.5 through 3.7, shall be determined by examination for the defects listed in table II. Examination shall be visual, tactile, or by measurement with standard inspection equipment.

4.7.3 Performance. Unless otherwise specified (see 6.2), performance testing shall be conducted under the following conditions:

a. Fluids. All tests shall be performed with hydraulic fluid conforming to MIL-H-5606 or MIL-H-6083. The hydraulic fluid temperature shall be 90° + 20°F.

b. Cleaning. All grease or foreign material shall be removed from interior parts of the valve before testing.

c. Air removal. Air shall be completely removed from all hydraulic portions of the valves prior to tests.