48 -- VALVES

Notice Date

November 9, 2001

Contracting Office

U.S. Environmental Protection Agency , 26 W. Martin Luther King Dr., Cincinnati, OH 45268

ZIP Code

45268

Solicitation Number

C700002T1

Response Due

November 26, 2001

Point of Contact

Scott Tharp (513) 487-2092

E-Mail Address

U.S. EPA -- Cincinnati Contracts Management Division (Tharp.Scott@epa.gov)

Description

The U.S. EPA, Office of Transportation and Air Quality in Ann Arbor, MI is seeking to procure one hundred (100) digital hydraulic valves with their electronic drivers. Fifty (5) valves each as a flow rate of 8 -- 12 gallons per minute (GPM), and fifty (50) valves each has a flow rate of 18 -22 GPM. In addition, nine (9) driver systems are needed to operate the valves in sequential and multiple operating modes. Five (5) drivers each has (4) independent signal outputs to drive four (4) digital valves, and four (4) drivers each has eight (8) independent signal outputs to drive (8) valves. The digital valve shall have the following features: consists of a spool, housing and two identical electromagnetic coils, valve injector and automotive hydraulic pump/motor applications. valve's flow passages and metering orifices must ensure a static and dynamic pressure balanced valve, has two opposing electromagnetic coils, which can be used for position sensing by monitoring back-EMF signals and utilizes magnetic latching technology to hold the valve in an open or closed position without additional energy but instead uses residual magnetism to stay latched in position. Capable of consistently controlling a specific rate of hydraulic flow characteristics up to five (5) multiple flow events, and electronically control the start, duration, and rate of flow of multiple events. meets the 10 -- 20 microseconds shot to shot and the 30 -- 40 microseconds valve to valve required by the engine industry (nominal). Hydraulic metering can be varied by controlling the digital valve pulse width and hydraulic supply pressure between 1,000 psi -- 3,200 psi. Response time of the digital valve shall be within 0.2 -- 0.3 milliseconds for the electronic control of pilot timing, duration, dwell, and main events. Hydraulic connections to supply and return oil of the digital valves are external using high pressure positive seal fittings. The driver shall have the following features: connection to 12 -- 15 VDC, 30-amp power supply; four (4) and eight (8) independent output control signals, one for each digital valve with TTL (Transistor-Transistor Logic) signal compatible optically isolated inputs; up to five (5) programmable injection events per delivery control signal input; analog (0 -- 5 volt) rail pressure set point output; feedback control algorithm to enable small consistent pilot injection quantities; serial communications to allow digital valve information to be uploaded from and downloaded to the driver; Windows 95/98/2000/NT applications software to exercise the driver; connect BNC connectors to pulse generator or engine control module and connect to digital valves with cable provided. Bench testing and complete calibration of the digital valves shall be included. The contractor shall supply one (1) set of manuals for each system including: layouts, interface drawings, and driver parameters. For the complete hydraulic digital operating systems, the contractor shall provide ninety (90) days warranty on all parts, labor and materials. This is not a Request for Proposal. Sources wishing to be considered must submit documentation to the: U.S. EPA, 26 W. Martin Luther King Dr., Cincinnati, OH 45268. Documentation must be submitted within 15 days of the date of publication of this notice. Submit your request in writing to Scott Tharp via mail, or fax (513) 487-2107, or email: Tharp.Scott@epa.gov

Web Link

Office of Acquisition Management -- Cincinnati Contracts (http://www.gov/oam/cinn_cmd)

Record

Loren Data Corp. 20011114/48SOL001.HTM (W-313 SN5127J0)