Overview
The Coilhose SV804 safety excess flow check valve is a critical safety device for pneumatic systems. Designed with a 1/2″ female NPT thread, this valve automatically shuts off air flow upon a sudden break in the air line, protecting personnel and property from dangerous whipping hoses and uncontrolled air release. The self-resetting design allows normal, unrestricted flow during operation while providing instantaneous protection when a line failure occurs.
Key Features
- Automatic air shutoff on sudden air line break—prevents hose whipping and personnel injury
- Self-resetting design—restores normal operation after line repair
- Aluminum body construction for lightweight, corrosion-resistant performance
- 1/2″ female NPT (FPT) connection standard in pneumatic systems
- Unrestricted flow in normal operation—no pressure drop penalty
Technical Specifications
Thread Size: 1/2″ FPT (Female NPT)
Body Material: Aluminum
Connection Type: Female NPT Thread
Design: Excess Flow Check Valve
Reset Function: Automatic
Typical Applications
- Pneumatic air hose systems in industrial and commercial applications
- Tool and equipment supply lines requiring safety shutoff
- Manufacturing facilities with compressed air distribution
- Workshops, garages, and service facilities with pneumatic tools
- Any system where air line rupture presents personnel hazard
Compatibility & Replacements
Compatible With
- Standard 1/2″ NPT pneumatic systems
- Compressed air distribution networks
- Pneumatic tool and equipment lines
Replaces / Drop-In Replacement For
The SV804 is the 1/2″ FPT model in the Coilhose safety excess flow check valve line. Other models in the series include the SV802 (1/4″ FPT). Verify specific interchangeability with your system requirements.
Works With
- Standard 1/2″ NPT fittings and couplers
- Industrial pneumatic hose and tubing
- Compressed air regulators and manifolds
