FM / UL Certified Fire Protection Butterfly Valve (API 609, Concentric Lug)
Supreme Valves' FM/UL Certified Concentric Lug Type Butterfly Valve (API 609 Category A & NFPA 13/14/20 compliant) is engineered for absolute reliability in fire protection piping and sprinkler networks. Featuring a robust Carbon Steel (ASTM A216 WCB) body, corrosion-resistant Gunmetal/Bronze (LG2) disc, EPDM fire-resistant liner, and a gear operator with a highly visible position indicator.
Key Applications
Industrial Applications & Engineering Problem Solving
The Engineering Challenge
In critical fire protection piping, standby valves remain open and untouched for years, making them highly susceptible to galvanic corrosion, rust seizing, and mechanical binding. When a fire emergency finally occurs, generic valves can jam or leak, dropping critical water pressure to sprinkler risers. Additionally, manual oversight can leave critical supply lines closed without the safety supervisor's knowledge.
The Supreme Valves Engineering Solution
Supreme Valves' FM/UL Approved Butterfly Valve solves this through a heavy-duty BS 1400 Bronze LG2 disc that prevents galvanic scaling and calcium adhesion even in stagnant water. It features a blowout-proof SS410 stem with self-lubricating PTFE bearings for immediate low-torque operation. An integrated tamper supervisory switch feeds directly to the central fire alarm control panel, alerting safety personnel immediately if the valve is closed by even a fraction of a turn.
Operational Use Cases & Scenarios
Sprinkler Riser Main Isolation
Operational Challenge: Maintaining constant water pressure at upper floor sprinkler loops while preventing unauthorized system shutoffs.
Engineering Benefit: Tamper-switch integration ensures immediate alerts to security desks if closed, while FM/UL approvals satisfy municipal building inspector codes.
Deluge Valve Station Manifolds
Operational Challenge: Isolating high-volume deluge water headers in chemical storage yards where chemical exposure and atmospheric weathering are severe.
Engineering Benefit: Fusion-bonded epoxy (FBE) coated ductile iron body resists heavy atmospheric corrosion, ensuring 100% operational readiness.
Technical Specifications
Material of Construction (MOC)
Purchase Options
Features & Benefits
FM/UL Dual Certification
Rigorously tested and certified by Underwriters Laboratories (UL) and Factory Mutual (FM) for fire protection mains.
Zero-Leakage Sealing
EPDM resilient liner compressed against the bronze disc provides bubble-tight zero-leakage shut-off under full system pressure.
Built-In Tamper Switch
Equipped with supervisor tamper switches for remote warning if the valve is partially or fully closed.
Superior Corrosion Resistance
Gunmetal BS 1400 disc prevents rust and scaling even when immersed in stagnant fire main water for long periods.
Frequently Asked Questions
Q Why is FM/UL certification crucial for fire protection butterfly valves?
Fire protection valves must be FM Approved and UL Listed to verify that they can reliably hold bubble-tight sealing during long-term standby, and shut down properly during an emergency. It ensures compliance with municipal building codes and lowers fire insurance premiums.
Q Can these valves be used underground?
Yes, but they must be installed inside accessible pits or chambers. For direct burial, Post Indicator Valves (PIVs) with extension shafts are required.
Q What is the standard test pressure for these valves?
The shell is tested at 1.5 times the working pressure (24 bar / 350 PSI) and the seat at 1.1 times (17.6 bar / 250 PSI) to verify structural and sealing integrity.