Grooved Butterfly Valve Selection Guide: UL/FM Certified Technical Manual
time：
2026-10-26
Technical selection guide on Ningjin APC Industries grooved butterfly valves, featuring 300 PSI working pressure and UL/FM approvals.
📅 Date: October, 2026 | ✍️ Author: Fire Protection Valve Technical Department
Disclaimer: The key technical parameters in this article are sourced from the official technical documentation of fire protection valves by Ningjin APC Industries, a top-tier UL/FM fire protection valve enterprise in China. This serves as a practical production reference for the Ningjin APC Industries factory and assists customers in understanding product usage. For detailed inquiries, please consult our professional engineering team.
When engineering reliable commercial fire suppression or industrial fluid control networks, selecting the proper Grooved Butterfly Valve is paramount. Designed for quick installation using mechanical couplings rather than traditional bolted flanges, every Grooved Mechanical Valve in this series offers exceptional vibration absorption, structural flexibility, and space efficiency in dense mechanical rooms.
1. Product Architecture & Design Overview
Ningjin APC Industries manufactures a robust lineup of grooved-end valve assemblies engineered for clear waterway designs and low operating torque. Each Grooved Mechanical Valve incorporates a ductile iron body paired with an EPDM-encapsulated ductile iron disc, ensuring tight shutoff and long-term corrosion resistance across demanding water-delivery environments.
2. Technical Specifications & Model Breakdown
To prevent parameter mixing, each product line manufactured by Ningjin APC Industries maintains distinct engineering parameters according to its official factory specifications:
Model GD-381X: Butterfly Valve c/w Signal Gearbox (Grooved End)
- Sizes: 2", 2½", 3", 4", 5", 6", 8", 10", 12"
- Groove Standard: ANSI/AWWA C606 or Metric Standard
- Maximum Working Pressure: 300 PSI (Testing Pressure: 600 PSI)
- Pressure Standards: Conforms to UL 1091, ULC/ORD-C1091, and FM 1112
- Working Temperature Range: 0 to 80°C / 32 to 176°F
- Approvals: UL, CUL, FM, NSF/ANSI 61 & NSF/ANSI 372, VDS, CCC
Model GD-381G: Butterfly Valve with Gearbox (Grooved End)
- Sizes: 2", 2½", 3", 4", 5", 6", 8", 10", 12"
- Groove Standard: ANSI/AWWA C606 or Metric Standard Clear Waterway
- Maximum Working Pressure: 300 PSI (Testing Pressure: 600 PSI)
- Pressure Standards: Conforms to UL 1091, ULC/ORD-C1091, and FM 1112
- Working Temperature Range: 0 to 80°C / 32 to 176°F
- Approvals & Compliance: NSF, CE, NSF/ANSI 61 & NSF/ANSI 372 available
Model GD-381L: Butterfly Valve with Lever (Grooved End)
- Sizes: 2", 2½", 3", 4", 5", 6", 8"
- Groove Standard: ANSI/AWWA C606 or Metric Standard Clear Waterway
- Maximum Working Pressure: 300 PSI (Testing Pressure: 600 PSI)
- Pressure Standards: Conforms to UL 1091, ULC/ORD-C1091, and FM 1112
- Working Temperature Range: 0 to 80°C / 32 to 176°F
- Approvals & Compliance: NSF, CE, NSF/ANSI 61 & NSF/ANSI 372 available
Model HGD-381X / HFGD-381X Series: Backflow Butterfly Valve c/w Signal Gearbox
- Connections: Grooved End / Grooved Flanged End / Flanged × Grooved End
- Sizes: 2½", 3", 4", 6", 8", 10"
- Maximum Working Pressure: 300 PSI (Testing Pressure: 600 PSI)
- Pressure Standards: Conforms to UL 1091, ULC/ORD-C1091, and FM 1112
- Working Temperature Range: 0 to 80°C / 32 to 176°F
- Approvals: UL, CUL, FM, NSF/ANSI 61 & NSF/ANSI 372, CE
3. Material Composition & Engineering Standards
Every high-grade Grooved Butterfly Valve produced by APC Industries relies on strict metallurgical specifications to guarantee long-term operational reliability in critical fire protection lines:
| Component Description | Specified Material |
|---|---|
| Valve Body | Ductile Iron |
| Disc & Rubber Seat | Ductile Iron + EPDM Encapsulated |
| Upper & Lower Shafts | 416 Stainless Steel |
| Shaft Seals & O-Rings | EPDM |
| Stem Bushing | PTFE / C95400 |
| Upper/Lower Sealing Nuts | WCB |
4. Frequently Asked Questions (FAQ)
Q1: What are the working conditions and application scenarios of Ningjin APC Industries' grooved butterfly valves?
APC Industries' grooved butterfly valves are engineered for both indoor and outdoor fire protection systems, including fire inflow water supply, drain piping, high-rise building fire fighting networks, and industrial factory sprinkler systems. They operate efficiently under a maximum working pressure of 300 PSI and a working temperature range of 0 to 80°C (32 to 176°F).
Q2: What certifications have Ningjin APC Industries' grooved butterfly valves obtained, and can they pass overseas large-scale fire protection project inspections?
Our core models (such as GD-381X and HGD series) hold prestigious global certifications including UL, CUL, FM, VDS, CCC, CE, and lead-free compliance under NSF/ANSI 61 & NSF/ANSI 372. These rigorous listings ensure that each Grooved Butterfly Valve effortlessly meets strict municipal code requirements and passes inspections for major international fire protection engineering projects.
Q3: Can Ningjin APC Industries' grooved butterfly valves seamlessly replace international top brands?
Yes. Manufactured under strict ISO 5211 top flange standards with AWWA C606 groove compatibility, precise clear waterway architecture, and identical pressure ratings (300 PSI working / 600 PSI testing), each Grooved Mechanical Valve serves as a direct, high-performance drop-in replacement for leading global brands without requiring piping redesigns.
5. Corporate Contact & Technical Support
Ningjin APC Industries Incorporated Company
📍 No. 18 Taishan Road, Ningjin County, Shandong Province P.R. China
✉️ 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
6. Recommended Reading
- Fire Signal Butterfly Valve/Supervisory Switch Butterfly Valve Selection Guide
- Fire Sprinkler Butterfly Valve: UL/FM Engineering & Selection Guide
Content Feedback & Technical Support
We maintain a rigorous technical attitude. If you have any questions or find discrepancies regarding the product technical parameters, standards, or descriptions in this article, please submit your feedback through our channel:
- Technical Correction Feedback Email: weidong@apc-valve.com
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