Nuclear Products
Qualified to IEEE Specifications

The pioneer and leader in the design and development of solenoid operated valves for the nuclear industry, ASCO offers a complete line of 3- and 4-way nuclear qualified valves, as well as pressure and temperature switches.  ASCO nuclear products are 100% inspected and functionally tested prior to shipment in order to insure that they meet the rigorous demands and high expectations of the nuclear industry.

ASCO nuclear qualified valves are used primarily as pilot valves for handling oil-free instrument air and inert gas in nuclear power plants.  These valves are designed to meet the most stringent environmental conditions encountered in nuclear power generating applications and meet or exceed the following IEEE Standards:

• IEEE-323 - "Standard for Qualifying Class 1E Equipment for Nuclear Power Generating Stations"

• IEEE382 - "Recommended Practices for Seismic Qualification of Class 1E Equipment for Nuclear Power Generating Stations"

• IEEE344 - "Qualification of Actuators for Power Operated Valve Assemblies with Safety-Related Functions for Nuclear Power Plants."

ASCO nuclear qualified pressure and temperature switches for Class 1E service are based on the operating principle of ASCO's Industrial (S-Series) Tri-Point line, which meets or exceeds the IEEE-323 and IEEE-344 Standards.

ASCO assures adherence to these standards by maintaining and extensive in-house testing program that is supplemented by independent outside testing facilities.  Qualification consists of subjecting each solenoid valve, pressure or temperature switch to the following tests as required by the previously noted IEEE specifications:

1. Thermal aging

2. Wear aging

3. Pressurization aging

4. Radiation aging

5. Vibration aging

6. Seismic event simulation

7. Radiation event simulation

8. LOCA/MSLB/HELB environmental simulation

All valves are designed with the following special features:

• Type N construction (NS Series), Class H (NP Series) coil insulation.

• Elastomers (gaskets, O-rings, discs): all materials designed to meet high radiation and high temperature degradation effects.

• Specially designed solenoid enclosures to withstand Loss-of-Coolant-Accident (LOCA) environment.

• Designed to meet seismic loadings.

All pressure and temperature switches are supplied with the following special features:

• Elastomers (gaskets, O-rings): all materials designed to meet high radiation and high temperature degradation effects.

• Elimination of radiation and temperature-affected materials.

• Designed to meet seismic loadings.

For more detailed information, contact us to receive a copy of the ASCO NP-2 Nuclear Products Catalog.

VALVATE ASSOCIATES
15925 Minnesota Ave., Paramount, CA  90723
(562) 633-4300 - (714) 761-3644
FAX: (562) 630-2345
sales@valvate.com

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