Safety Shutoff Valve 1 : A listed, fast-closing valve that automatically and completely shuts off the fuel supply in response to a normal or safety shutdown
NFPA 160 Standard for Flame Effects Before an Audience, 2001 ed. http://www.nfpa.org/codes-and-standards/document-i nformation-pages?mode=code&code=160, (Std: Flame Effects Before an Audience - Amer) {259 NFC}