Disclaimer: The key technical parameters in this article are derived from the official technical documents of Ningjin APC Industries, a tier-one fire protection valve manufacturer in China (serving as actual production references for Ningjin APC Industries factory valves and for customers to understand product usage; please consult our professional engineering team for specific inquiries).
1. Advantages of Lever-Operated Grooved Valves in Bulk Procurement
For regional piping distributors, plumbing wholesalers, and mechanical contractors managing compact branch lines, fire water inflow connections, and drain headers, sourcing a GD-381L Lever Operated Grooved Butterfly Valve Wholesale order delivers rapid quarter-turn manual actuation, low profile envelope dimensions, and rugged ductile iron construction.
Ningjin APC Industries operates exclusively on a **made-to-order** manufacturing model without off-the-shelf warehouse inventory, enabling bulk buyers to customize protective epoxy finishes, groove standards, and lead-free potable water certifications directly at the factory level.
2. Core Technical Specifications & Compliance Scope
Key engineering parameters for a GD-381L Lever Operated Grooved Butterfly Valve Wholesale inquiry include:
- Nominal Size Range: 2", 2½", 3", 4", 5", 6", and 8"
- Maximum Working Pressure: 300 PSI (2.1 MPa) continuous service
- Hydrostatic Testing Pressure: 600 PSI factory shell and seat test
- Pressure Design Compliance: Pressure rating conforms to UL 1091, ULC/ORD-C1091, and FM 1112 structural criteria
- Product Certifications: CE certified; certified lead-free options conforming to NSF/ANSI 61 & NSF/ANSI 372 available upon request (Note: Lever-operated butterfly valves do not carry UL or FM listings; for UL/FM listed sprinkler main valves, specify the supervised GD-381X series)
- Groove Standard: ANSI/AWWA C606 or metric standard clear waterway design
- Working Temperature Range: 0 ~ 80°C (32 ~ 176°F)
- Actuation & Top Flange: Heavy-duty malleable iron multi-position lever handle with ISO 5211 top flange
3. Complete Component Bill of Materials (BOM)
Every valve supplied under a GD-381L Lever Operated Grooved Butterfly Valve Wholesale contract incorporates durable, corrosion-resistant metallurgy:
| 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 | Stem Bushing | PTFE / C95400 |
| 9 | O-Ring | EPDM |
| 10 | Lever Handle | Malleable Iron |
4. Frequently Asked Questions (FAQ)
The GD-381L carries CE certification and optional NSF/ANSI 61 & 372 lead-free potable water certification. While its 300 PSI pressure rating conforms to UL 1091 and FM 1112 structural criteria, quarter-turn lever-operated butterfly valves do not hold UL or FM listings.
The GD-381L series is manufactured in nominal pipe diameters ranging from 2" up to 8" (2", 2½", 3", 4", 5", 6", and 8").
The multi-position locking lever handle is constructed from high-strength malleable iron mounted atop an ISO 5211 top flange.
They are widely installed in fire inflow water supply lines, drain piping, HVAC water loops, municipal water distribution, and non-UL/FM mandated fire branch lines up to 300 PSI.
The standard warranty period is generally 18 months. Please verify specific wholesale contract terms with your sales representative.
No off-the-shelf inventory is stocked; all wholesale orders are produced strictly made-to-order with standard production lead times of 6 to 9 weeks.
