Series 520-50 ASME III excess flow check valves are engineered for liquid or gas applications in the Nuclear Power industry where personnel safety is a prime consideration. They are designed to sense and shut off surging fluid flow caused by a downstream line rupture. Position switches provide remote indication when the valve has closed. An integral solenoid valve provides remote reset capability after restoration of downstream system.

Absolute zero leakage to the local environment is provided by a completely welded construction throughout the pressure envelope.

Extreme reliability is inherent due to rugged design, simplicity of operation and a minimum number of moving parts. Internal parts are contoured to retard buildup of contamination and sludge. Compact, light weight design provides excellent resistance to seismic vibration and shock.

Series 520-50 check valves are qualified to IEEE 323 (1983), 344 (1975) and 382 (1980) and NUREG-0588. Valves are qualified for 40 years depending upon temperature and conditions. Seismic and stress reports are available when required. A completely enclosed and encapsulated coil insures continuous operation during a LOCA event.

Features and Options:

Absolute zero leakage to the environment. Valcor's "through the wall" magnetic principle of operation eliminates all potential leak points such as packings, bellows and diaphragms.
Valve ratings: ANSI class 150 to 2500.
Fluid temperature up to 650° F.
Custom design feature allows slow closing of the disk to prevent water hammer.
Resistant to contamination an sludge buildup.
ASME Section III, Classes 1, 2, and 3.
Stress and Seismic analysis available.
Radiation resistance: 2 x 108 rads.
Solenoid operated reset capability.
Body material: Standard: Stainless Steel.
Stellite or elastomer seats.
Position indication switches for remote status indication.
Line connection: Standard: Socket weld, Optional Butt Weld or Tube Extensions.
Solenoid operator is constructed of Class H materials or better. 120 VAC or 125 VDC. Other voltages available.
All electrical components totally enclosed. Meets minimum of NEMA 4 or better. Qualified to IEEE 323, 382 & 344; Also NUREG-0588 Cat. 1.
Solenoid and switch assemblies readily accessible for removal or maintenance without disturbing the pressure boundary.
 
[ Nuclear Home ] [ Sales Representatives - Valcor Nuclear ] [ BTBA ] [ Data Sheets ] [ What's New - Nuclear ] [ Request Information - Valcor Nuclear ] [ Valcor Nuclear Products ]