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|  MIL-V-1558B
3.3.12.2.1 The electrical controls shall provide for opening and closing the pilot
control valve by momentary operation of remote pushbuttons. The controls shall be mechani-
cally latched in such a manner that the position of the pilot valve will not at any time
be affected by the loss of electric power. The control shall incorporate contacts for
operation of a remote 115-volt indicator light to indicate when the pilot control valve is
in the open position. Provision shall be made for emergency manual operation. The manual
operating means shall be so protected as not to be readily operated by unauthorized persons,
but shall be readily accessible to authorized personnel. Sufficient capacity shall be
incorporated in the control to assure positive operation of the pilot valve under all
conditions of service. It is to be expected that a valve (installed on a ship and connected
to a fire main continuously under pressure) may not be operated for a period of six months
and positive operation of the valve on low (80 percent of rated) voltage is required after
such a period of idleness.
3.3.13 Position indicating mechanism. Each main valve shall incorporate a mechanism
for indicating the position of the valve disc.
3.3.14 Shock. The valve shall be designed to meet the shock requirements of MIL-S-
#
901 for grade A, class I, type A equipment.
3.4 Repair parts. Stock repair parts (shore-based] shall be handled in accordance
with procedures of MIL-P-15137 (see 6.2). The following parts of the valves shall be
furnished as onboard repair parts, as specified (one set = 100 percent per valve) (see 6.1):
(a)
Diaphragms.
(b)
Springs.
Seat rings and discs or disc inserts.
(c)
(d)
Compression rings or seals.
(e)
Pilot valve, complete.
Repair parts for electrical control mechanism when
(f)
furnished, shall be in accordance with MIL-C-2212.
#
3.5 Special tools. Special tools for servicing of the valve, when required shall
be furnished in the quantity specified (see 6.1) . Special tools are defined as those tools
not listed in the Federal Supply Catalog (copies of this catalog may be consulted in the
office of the Defense Contract Administration Service (DCAS)) .
#
3.6 Drawings. The contractor shall furnish, prior to production, drawings of the
valve proposed for approval of the command or agency concerned. Drawings shall conform to
categories B, E, G and H, and form 3 of MIL-D-1000 and type II of MIL-D-1000/2.
#
3.7 Technical manuals. One technical manual in accordance with type I of MIL-M-15071
shall be furnished with each valve as specified (see 6.1).
Valves shall be free from defects affecting their appearance or that
3.8 Workmanship.
may affect their operation. Castings shall be clean, sound and free from blow holes, hard
spots, porosity, cracks, and other injurious defects. They shall be smooth and well
cleaned both inside and outside, and all fins and roughness shall be removed. Castings
shall not be repaired, plugged, impregnated, brazed, or burned. The workmanship shall be
first class in every respect.
4.
QUALITY ASSURANCE PROVISIONS
#
4.1 Responsibility for inspection. Unless otherwise specified in the contract or
purchase order, the supplier is responsible for the performance of all inspection require-
ments as specified herein, Except as otherwise specified in the contract or order, the
supplier may use his own or any other facilities suitable for the performance of the in-
spection requirements specified herein, unless disapproved by the Government, The Govern-
ment reserves the right to perform any of the inspections set forth in the specification
where such inspections are deemed necessary to assure supplies and services conform to
prescribed requirements.
#
4.2 Qualification
Qualification tests shall be conducted at a laboratory
satisfactory to the Naval Ship Engineering Center (NAVSEC). Qualification tests shall
consist of the tests specified in 4.2.1.
Application for Qualification tests shall be made in accordance with "Provisions
Governing Qualification SD-6" (see 6.3 and 6.3.1).
5
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