UL FM Gear Operated Butterfly Valve: Ultimate Technical Guide
time：
2026-10-28
Explore Ningjin APC Industries's UL/FM certified Gear Operated Butterfly Valve engineered for 300 PSI fire protection systems with robust ductile iron build.
Disclaimer: The key technical parameters in this article are derived from the official technical documentation of Ningjin APC Industries, a top-tier Chinese UL/FM fire protection valve enterprise (serving as practical manufacturing references and user guidance. For specific inquiries, please consult our professional team).
When designing high-integrity fire suppression networks and commercial plumbing infrastructure, selecting the appropriate flow control mechanism is critical. The Gear Operated Butterfly Valve represents a benchmark in reliable, high-torque actuation, combining quarter-turn operational speed with mechanical advantage for effortless control. Engineered by Ningjin APC Industries, these valves deliver superior sealing and robust durability across diverse industrial layouts.
1. Engineering Principles and Core Technical Specifications
Ningjin APC Industries manufactures a comprehensive range of fire protection valves designed to meet rigorous international standards. A premium Gear Operated Butterfly Valve integrates a self-locking worm gear operator with an internal supervisory signal switch or manual handwheel, ensuring precise valve positioning and clear visual status indication.
- Maximum Working Pressure: 300 PSI (2.07 MPa)
- Maximum Testing Pressure: 600 PSI (4.14 MPa)
- Pressure Standards: Conforms strictly to UL 1091, ULC/ORD-C1091, and FM 1112.
- Working Temperature Range: 0°C to 80°C (32°F to 176°F).
- Top Flange Standard: ISO 5211 compliant for universal actuator mounting.
2. Product Lineup & Configuration Matrix
To accommodate various piping configurations, Ningjin APC Industries offers specialized models including grooved end, wafer end, and grooved flanged end variants with or without internal signal gearboxes. Below is the technical overview of the primary series:
| Model Series | Connection Type | Available Sizes | Key Approvals |
|---|---|---|---|
| GD-381X / HGD-381X | Grooved End c/w Signal Gearbox | 2" to 12" (Model specific) | UL, CUL, FM, NSF/ANSI 61 & 372, VdS, CCC |
| WD-371X | Wafer End c/w Signal Gearbox | 2" to 12" | UL, CUL, FM, NSF/ANSI 61 & 372, VdS, CCC |
| GD-381G / WD-371G | Grooved / Wafer with Standard Gearbox | 2" to 12" | NSF, CE, Standard Fire Compliance |
3. Material Construction and Durability
Durability under corrosive and high-stress environments is achieved through precise metallurgy. A standard Gear Operated Butterfly Valve from APC utilizes high-grade materials to ensure long service life:
- Valve Body: Ductile Iron for superior tensile strength and impact resistance.
- Disc: Ductile Iron encapsulated with EPDM rubber for bubble-tight shutoff.
- Upper & Lower Shafts: 416 Stainless Steel providing excellent corrosion resistance and torsional rigidity.
- Stem Bushing: PTFE or C95400 copper alloy ensuring smooth low-friction rotation.
- Coating: Premium epoxy coated finish or customized coating upon request. Certified lead-free options are available via NSF/ANSI 61 & NSF/ANSI 372 compliance.
4. Typical Applications in Fire Protection Architecture
Designed for versatile deployment, these valves excel in demanding fire safety infrastructure:
- Indoor and Outdoor fire protection layouts.
- Fire inflow water mains and drainage pipe networks.
- High-rising building fire fighting systems requiring reliable zone isolation.
- Industrial factory building fire protection loops.
Frequently Asked Questions (FAQ)
Q1: What are the working conditions and application scenarios for Ningjin APC Industries's Gear Operated Butterfly Valve?
A: They are engineered for indoor and outdoor use, fire inflow water, drain pipes, high-rise building fire fighting systems, and industrial factory building fire protection systems, operating within a temperature range of 0 to 80°C (32 to 176°F) and a maximum working pressure of 300 PSI.
Q2: What certifications has Ningjin APC Industries's Gear Operated Butterfly Valve obtained, and can it pass overseas large-scale fire protection project acceptance?
A: The valves have obtained prestigious global certifications including UL, CUL, FM, NSF/ANSI 61 & NSF/ANSI 372, VdS, CCC, and CE, making them fully compliant with major overseas fire protection project acceptances.
Q3: Can Ningjin APC Industries's Gear Operated Butterfly Valve replace international top brands?
A: Yes, with rigorous compliance to UL 1091, ULC/ORD-C1091, and FM 1112 standards, robust ductile iron construction, EPDM encapsulation, and 600 PSI testing pressure, they offer direct, high-reliability compatibility with leading international valve specifications.
Contact & Corporate Information
Ningjin APC Industries Incorporated Company
No. 18 Taishan Road, Ningjin County, Shandong Province, P.R. China
Website: http://www.apc-valve.com/
Email: njcuishusheng@vip.163.com | rain.cui@apc-valve.com
Customer Service Contact:
Contact Person: Ms. Cui
WeChat: cuiyuying01
Tel: +86 18600252968 / +86 534 5571078
Fax: +86-534-5216766
Recommended Reading
- EPDM Seated Butterfly Valves for Fire Protection Systems: Comprehensive Technical Guide
- UL/FM Ductile Iron Butterfly Valve for Fire Protection Systems
We uphold a rigorous technical attitude. If you have any questions or find any discrepancies regarding the product technical parameters, standards, or descriptions in this article, please feel free to submit your feedback through our dedicated channel:
📧 Technical Correction Feedback Email: weidong@apc-valve.com
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