Attachment 0001 - SOW Paragraph 2.1 Appendix A - Navy Common Actuator System Requirements Document (SRD).pdf

Navy Common Actuator

System Requirements Document

Table of Contents

Program Overview

System Description

Work Breakdown Structure

System Requirements, Criticality, and Safety

Specifications

Program Overview

Existing electric valve actuators throughout the Fleet have consistently been found to be unreliable due to various electro-mechanical issues. Electric valve actuator failures are a common finding during system assessments across all platforms in distributed piping systems. By utilizing contractor design and manufacturing expertise alongside In Service Engineering Agent (ISEA) Subject Matter Expert (SME) deckplate and system experience, the Navy Common Actuator (NCA) program will design, prototype, test, and qualify a new electric valve actuator. By addressing commonly occurring design flaws and implementing ISEA recommendations, the NCA program aims to increase the reliability, supportability, and commonality while reducing the acquisition and operational costs of electric valve actuators in the Fleet.

The NCA will be a Navy-owned design capable of procurement and production via various acquisition strategies. The design will be developed by a contractor with oversight and direction from the valve actuator ISEAs. Design direction and technical guidance will be based on existing standards and specifications with modifications as necessary to meet criteria as defined within this document. The designer shall work closely with the Government technical representatives and SMEs to develop the design for a specific application.

Reliability

The NCA program aims to increase reliability of electric valve actuators by resolving many of the common issues associated with the failure of actuators across a range of manufacturers. ISEA input and technical experience will guide design best practices to avoid the use of parts, systems, and design features which have proven to be unreliable in operation.

Supportability

The NCA design will allow for the incremental upgrade and modification of valve actuator design features to provide improved performance in current shipboard operating environments. The NCA design will also allow the extension to additional systems and services. Modular subsystem design will allow for the procurement of replacement piece parts as needed to support shipboard repairs, as required, and prevention of obsolescence issues regularly experienced with current valve actuators.

Commonality

As the NCA program develops and expands for incorporation into additional systems and services, the commonality gained by the NCA program will ease training burdens for Ships Force, simplify lifecycle logistics management, and provide concise pathways for the repair of the valve actuators.

System Description

This contract will develop the 440VAC quarter-turn Navy Common Actuator design.

Throughout design development, efforts shall be made to select and design components for commonality throughout all proposed NCA models. The designer shall evaluate the suitability of interchangeable parts for use in multiple models of the NCA.

The NCA design shall maximize the use of commercial off the shelf (COTS) products. Commercial products must be evaluated for supportability, availability, and cost effectiveness throughout the lifecycle of the NCA. Commercial products must be verified as being available from, at a minimum, three (3) independent sources. Where three (3) sources are unavailable, the Government may choose at its discretion, to waive this requirement.

Work Breakdown Structure

ID Sub-System

3.0 Navy Common Actuator

3.1.0 General

3.1.1 Housing

3.1.2 Motor

3.1.3 Gearing and Shafting

3.1.4 Electrical and Electronics

3.2.0 Human-Machine Interface

3.2.1 Handwheel

3.2.2 Pushbutton

3.2.3 Position Indication

3.3.0 Interfacing

3.4.0 Environmental

System Requirements, Criticality, and Safety

ID Requirement Criticality Safety

3.0.1 NCA shall be capable of actuating quarter-turn Model "R"

Round and Model "K" Oval Ventilation Closure.

High

3.0.2 NCA shall maximize the use of commercial off the shelf

(COTS) products.

Medium

3.0.3 NCA shall be capable of mounting in any orientation. High

3.0.4 NCA shall maintain safe operating temperature IAW MIL-

STD-1472G.

High Y

3.0.5 NCA shall not utilize any type of microprocessor. High

3.0.6 Installation and maintenance of the NCA shall be

accomplished without the need for special tools.

High

3.0.7 NCA shall only use lubricants and compounds IAW approved military specifications and standards.

High

3.0.8 NCA shall utilize a modular design for ease of repair. High

3.0.9 NCA design shall limit corrosion due to dissimilar metals. High

3.0.10 NCA shall avoid the use of hazardous materials. High Y

3.0.11 NCA design shall minimize the use of paint or coatings. Medium

3.1.0.1 NCA shall be capable of operating in the torque ranges for the specified closure.

High

3.1.0.2 NCA shall be capable of completing either an open or a close operation within 30 seconds.

Low

3.1.1.1 NCA housing shall be capable of accommodating a future encoder or potentiometer.

Low

3.1.1.2 NCA shall be constructed of corrosion resistant materials. High

3.1.1.3 NCA housing shall be designed to meet IP55 rating. High

3.1.2.1 The NCA motor shall be designed with consideration for ease of replacement.

Low

3.1.2.2 The motor shall not engage or add resistance to manual handwheel operation.

High

3.1.3.1 Gearing and associated mechanisms shall be designed to withstand 150% of the maximum design torque value.

High Y

3.1.3.2 NCA shall not utilize aluminum in its construction. Low

3.1.3.3 NCA shall not utilize set screws as the sole means of maintaining position.

High

3.1.3.4 NCA shall be designed to maintain consistent position accuracy over its entire lifecycle.

Medium

3.1.3.5 Plastic parts shall not be used in the gearing or drivetrain. Low

3.1.3.6 Shafting shall be of solid construction, e.g. no split shafts. Medium

3.1.4.1 NCA shall utilize three-phase 440VAC power. Medium

3.1.4.2 NCA shall be powered by a discrete cable and connector. Medium

3.2.1.1 NCA shall be capable of manual operation via handwheel.

3.2.1.2 The NCA manual handwheel shall close valve by a clockwise rotation.

High

3.2.1.3 Motorized operation, nor the failure thereof, shall not impede manual operation of the handwheel.

Medium

3.2.1.4 Handwheel assembly shall be designed to withstand 150% of the maximum design torque value.

High

3.2.1.5 Direction of operation shall be indicated on the handwheel. High

3.2.2.1 NCA shall be capable of local pushbutton operation. High

3.2.3.1 NCA shall provide local mechanical valve position

indication. The mechanism shall indicate open, shut, and intermediate positions.

High

3.2.3.2 Position measuring devices shall be designed to withstand the NCA's service life without adjustment.

High

3.3.1 NCA shall be controlled via 120 VAC contacts. Medium

3.4.1 NCA shall be designed to meet the vibrations requirements per MIL-STD-167-1.

High

3.4.2 NCA shall be designed to meet the Grade A shock

requirements of MIL-DTL-901E.

High

3.4.3 NCA shall be designed to operate in temperatures ranging from -20 deg F to 149 deg F IAW DOD-V-24657.

Medium

3.4.4 NCA shall be designed to operate in humidity conditions up to 100% relative humidity IAW DOD-V-24657.

High

3.4.5 NCA shall be designed to meet the noise requirements of

MIL-STD-740.

Medium

3.4.6 NCA shall be designed in accordance with the electrical power requirements of MIL-STD-1399.

High

3.4.7 NCA shall be designed to meet the EMI requirements of

MIL-STD-461.

High

Specifications

The NCA shall be designed and constructed in accordance with the following standards and specifications. Any deviation shall be approved in writing and documented by the designer and the Lead System Engineer (LSE).

ID Specification Title

6.1 DOD-STD-1399 Interface Standard for Shipboard Systems

6.2 MIL-STD-167-1 Mechanical Vibrations of Shipboard Equipment

6.3 MIL-S-901

Synchro Phasing Tester

6.4 MIL-STD-740 Airborne and Structureborne Noise Measurements and Acceptance Criteria of Shipboard Equipment

6.5 MIL-HDBK-454 General Guidelines for Electronic Equipment

6.6 MIL-DTL-917 Electric Power Equipment, Basic Requirements for

6.7 MIL-PRF-17331 Lubricating Oil, Steam Turbine and Gear, Moderate Service

6.8 DOD-G-24508 Grease, High Performance, Multipurpose (Metric)

6.9 MIL-PRF-46010 Lubricant, Solid Film, Heat Cured, Corrosion Inhibiting NATO Code - S-1738

6.10 MIL-L-24131 Lubricant, Colloidal Graphite in Isopropanol

6.11 MIL-L-24478 Lubricant, Molybdenum Disulfide in Isopropanol

6.12 A-A-59491

Sealing Compound, Thread and Gasket, Hydrocarbon Fluid and Water Resistant

6.13 SAE-AS8660 SILICONE COMPOUND NATO CODE NUMBER S-736

6.14 A-A-59720

Sealing and Locking Compounds, Single-Component

6.15 MIL-PRF-24548 Penetrating Fluid

6.16 MIL-DTL-1222 Studs, Bolts, Screws and Nuts for Applications where a High Degree of Reliability is Required; General Specification for

6.17 FED-STD-H28 Screw-Thread Standards for Federal Services

6.18 MIL-STD-1472G Human Engineering

6.19 MIL-STD-1310 Shipboard Bonding, Grounding, and other Techniques for Electromagnetic Compatibility, Electromagnetic Pulse (EMP) Mitigation, and Safety

6.20 MIL-STD-5015 Electrical Connections

6.21 MIL-STD-461 Requirements for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipment

System Requirements, Criticality, and Safety

Specifications