Statement: The key technical parameters in this document are sourced from the official technical documentation for fire butterfly valves published by Ningjin APC Industries, a tier-one Chinese UL/FM fire valve manufacturer. This documentation serves as a production reference for fire valves manufactured at the Ningjin APC Industries plant and as product information for customers; for any detailed questions, please consult our professional team.
1. Application Scope in Industrial Factory Fire Systems
Large-scale industrial manufacturing facilities, logistics hubs, and heavy production plants require dedicated fire suppression infrastructure to safeguard personnel and high-value assets. Specifically engineered for water-based fire protection networks—rather than chemical process lines—an Industrial Plant Fire Protection Butterfly Valve provides reliable shutoff and flow regulation across indoor mechanical pump rooms, overhead sprinkler mains, fire inflow water lines, and outdoor perimeter fire loops.
Designed for both indoor and outdoor installations, these valves maintain zero-leakage performance under continuous static water pressure while integrating seamlessly with facility Fire Alarm Control Panels (FACP) via supervisory tamper switches.
2. Core Technical & Environmental Parameters
To meet the structural and hydraulic demands of sprawling factory fire grids, every Industrial Plant Fire Protection Butterfly Valve adheres to strict international engineering benchmarks:
- Maximum Working Pressure: 300 PSI (2.1 MPa) continuous service
- Maximum Testing Pressure: 600 PSI factory hydrostatic shell and seat test
- Pressure & Structural Compliance: Conforms to UL 1091, ULC/ORD-C1091, and FM 1112
- Working Temperature Range: 0 ~ 80°C (32 ~ 176°F) for non-freezing water service
- External Corrosion Protection: Factory fusion-bonded epoxy coating standard (custom protective coatings available upon request)
- Actuator Interface Standard: ISO 5211 top flange mounting
- Potable & Combined Water Compliance: Certified lead-free construction conforming to NSF/ANSI 61 & NSF/ANSI 372 available for industrial sites utilizing combined domestic and fire water mains
3. Piping Connection Configurations & Model Selection
Industrial plant fire systems utilize diverse piping layouts ranging from long-run grooved steel headers to flanged pump headers. Selecting the appropriate Industrial Plant Fire Protection Butterfly Valve configuration ensures rapid installation and minimal pressure drop:
| Model Series | End Connection Style | Nominal Size Range | Operator Type |
|---|---|---|---|
| GD-381X / HGD-381X | Grooved End (ANSI/AWWA C606 Clear Waterway) | 2" – 12" | Signal Gearbox c/w Switch Assembly |
| WD-371X | Wafer End (ANSI 125/150 & DIN 2501 PN10/16) | 2" – 12" | Signal Gearbox c/w Switch Assembly |
| HGD-381X-175 / HFGD-381X | Grooved × Flanged / Flanged × Grooved Hybrid | 2½" – 10" | Signal Gearbox c/w Switch Assembly |
| GD-381G / WD-371G | Grooved End or Wafer End | 2" – 12" | Standard Worm Gearbox (Non-Signal) |
| GD-381L / WD-371L | Grooved End or Wafer End | 2" – 8" (Grooved) / 2" – 12" (Wafer) | Malleable Iron Manual Lever Handle |
4. Complete Valve Bill of Materials (BOM)
To prevent stem binding and ensure long service life in industrial water networks, each Industrial Plant Fire Protection Butterfly Valve incorporates durable, corrosion-resistant internal components:
| No. | Component Description | Material Specification |
|---|---|---|
| 1 | Upper Shaft Sealing Nut | WCB |
| 2 | Shaft Seal | EPDM |
| 3 | Body | Ductile Iron |
| 4 | Upper Shaft | 416 Stainless Steel |
| 5 | Disc + Rubber Seat | Ductile Iron + EPDM Encapsulated |
| 6 | Lower Shaft | 416 Stainless Steel |
| 7 | Lower Shaft Sealing Nut | WCB |
| 8 | End Face Seal (Wafer) / Stem Bushing | EPDM / PTFE or C95400 |
| 9 | O-Ring / Stem Bushing | EPDM / PTFE or C95400 |
| 10 | Gearbox / Lever / Plug | Ductile Iron / Malleable Iron / C95400 |
5. Signal Gearbox & Tamper Prevention
In sprawling manufacturing complexes, unauthorized valve closure poses a major fire safety risk. Supervised models feature a rugged ductile iron signal gearbox housing factory pre-wired internal micro-switches, nylon clips, and EPDM weatherproofing gaskets. Controlled gear reduction ratios (24:1 for 2"–6", 30:1 for 8"–10", and 80:1 for 12") ensure smooth manual operation while preventing rapid valve closure that could induce destructive water hammer in long factory supply mains.
6. Frequently Asked Questions (FAQ)
They are specifically engineered for indoor and outdoor industrial factory building fire fighting systems, fire inflow water networks, sprinkler mains, and drain piping operating with water media at up to 300 PSI and 0 to 80°C (not intended for chemical process pipelines).
They carry comprehensive international approvals including UL, CUL, FM, VdS, CE, and CCC, alongside optional NSF/ANSI 61 & 372 lead-free certification, ensuring full acceptance by global insurers and Authorities Having Jurisdiction (AHJ).
Yes. Their 300 PSI/600 PSI pressure ratings, 416 stainless steel shafts, EPDM-encapsulated ductile iron discs, and AWWA C606/ANSI/DIN dimensional standards match leading Western brands.
They comply with North American UL 1091 and FM 1112 standards, AWWA C606 grooved specifications, ANSI 125/150 and DIN 2501 PN10/16 flange standards, and ISO 5211 top flange mounting benchmarks.
The standard warranty period is generally 18 months. Please confirm specific project terms with your sales representative.
All units are manufactured on a made-to-order basis tailored to your project specifications, with typical production lead times ranging from 6 to 9 weeks.
